16. 3D Vector Graphics |
Module GL |
Not implemented OpenGL methods:
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void GL.glAccum(int op, float value)
The accumulation buffer is an extended-range color buffer. Images are not rendered into it. Rather, images rendered into one of the color buffers are added to the contents of the accumulation buffer after rendering. Effects such as antialiasing (of points, lines, and polygons), motion blur, and depth of field can be created by accumulating images generated with different transformation matrices.
Each pixel in the accumulation buffer consists of red, green, blue, and alpha values. The number of bits per component in the accumulation buffer depends on the implementation. You can examine this number by calling glGetIntegerv four times, with arguments GL_ACCUM_RED_BITS , GL_ACCUM_GREEN_BITS , GL_ACCUM_BLUE_BITS , and GL_ACCUM_ALPHA_BITS . Regardless of the number of bits per component, the range of values stored by each component is [-1, 1]. The accumulation buffer pixels are mapped one-to-one with frame buffer pixels.
glAccum operates on the accumulation buffer. The first argument, op, is a symbolic constant that selects an accumulation buffer operation. The second argument, value, is a floating-point value to be used in that operation. Five operations are specified: GL_ACCUM , GL_LOAD , GL_ADD , GL_MULT , and GL_RETURN .
All accumulation buffer operations are limited to the area of the current scissor box and applied identically to the red, green, blue, and alpha components of each pixel. If a glAccum operation results in a value outside the range [-1, 1], the contents of an accumulation buffer pixel component are undefined.
The operations are as follows:
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To clear the accumulation buffer, call glClearAccum with R, G, B, and A values to set it to, then call glClear with the accumulation buffer enabled.
Specifies the accumulation buffer operation. Symbolic constants GL_ACCUM , GL_LOAD , GL_ADD , GL_MULT , and GL_RETURN are accepted.
Specifies a floating-point value used in the accumulation buffer operation. op determines how value is used.
GL_INVALID_ENUM is generated if op is not an accepted value.
GL_INVALID_OPERATION is generated if there is no accumulation buffer.
GL_INVALID_OPERATION is generated if glAccum is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glAlphaFunc(int func, float ref)
The alpha test discards fragments depending on the outcome of a comparison between an incoming fragment's alpha value and a constant reference value. glAlphaFunc specifies the reference value and the comparison function. The comparison is performed only if alpha testing is enabled. By default, it is not enabled. (See glEnable and glDisable of GL_ALPHA_TEST .)
func and ref specify the conditions under which the pixel is drawn. The incoming alpha value is compared to ref using the function specified by func. If the value passes the comparison, the incoming fragment is drawn if it also passes subsequent stencil and depth buffer tests. If the value fails the comparison, no change is made to the frame buffer at that pixel location. The comparison functions are as follows:
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glAlphaFunc operates on all pixel write operations, including those resulting from the scan conversion of points, lines, polygons, and bitmaps, and from pixel draw and copy operations. glAlphaFunc does not affect screen clear operations.
Specifies the alpha comparison function. Symbolic constants GL_NEVER , GL_LESS , GL_EQUAL , GL_LEQUAL , GL_GREATER , GL_NOTEQUAL , GL_GEQUAL , and GL_ALWAYS are accepted. The initial value is GL_ALWAYS .
Specifies the reference value that incoming alpha values are compared to. This value is clamped to the range 0 through 1, where 0 represents the lowest possible alpha value and 1 the highest possible value. The initial reference value is 0.
GL_INVALID_ENUM is generated if func is not an accepted value.
GL_INVALID_OPERATION is generated if glAlphaFunc is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glArrayElement(int i)
glArrayElement commands are used within glBegin /glEnd pairs to specify vertex and attribute data for point, line, and polygon primitives. If GL_VERTEX_ARRAY is enabled when glArrayElement is called, a single vertex is drawn, using vertex and attribute data taken from location i of the enabled arrays. If GL_VERTEX_ARRAY is not enabled, no drawing occurs but the attributes corresponding to the enabled arrays are modified.
Use glArrayElement to construct primitives by indexing vertex data, rather than by streaming through arrays of data in first-to-last order. Because each call specifies only a single vertex, it is possible to explicitly specify per-primitive attributes such as a single normal per individual triangle.
Changes made to array data between the execution of glBegin and the corresponding execution of glEnd may affect calls to glArrayElement that are made within the same glBegin /glEnd period in non-sequential ways. That is, a call to
glArrayElement that precedes a change to array data may access the changed data, and a call that follows a change to array data may access original data.
Specifies an index into the enabled vertex data arrays.
void GL.glBindTexture(int target, int texture)
glBindTexture lets you create or use a named texture. Calling glBindTexture with
target set to GL_TEXTURE_1D or GL_TEXTURE_2D and texture set to the name of the newtexture binds the texture name to the target. When a texture is bound to a target, the previous binding for that target is automatically broken.
Texture names are unsigned integers. The value zero is reserved to represent the default texture for each texture target. Texture names and the corresponding texture contents are local to the shared display-list space (see glXCreateContext ) of the current GL rendering context; two rendering contexts share texture names only if they also share display lists.
You may use glGenTextures to generate a set of new texture names.
When a texture is first bound, it assumes the dimensionality of its target: A texture first bound to GL_TEXTURE_1D becomes 1-dimensional and a texture first bound to GL_TEXTURE_2D becomes 2-dimensional. The state of a 1-dimensional texture immediately after it is first bound is equivalent to the state of the default GL_TEXTURE_1D at GL initialization, and similarly for 2-dimensional textures.
While a texture is bound, GL operations on the target to which it is bound affect the bound texture, and queries of the target to which it is bound return state from the bound texture. If texture mapping of the dimensionality of the target to which a texture is bound is active, the bound texture is used. In effect, the texture targets become aliases for the textures currently bound to them, and the texture name zero refers to the default textures that were bound to them at initialization.
A texture binding created with glBindTexture remains active until a different texture is bound to the same target, or until the bound texture is deleted with glDeleteTextures .
Once created, a named texture may be re-bound to the target of the matching dimensionality as often as needed. It is usually much faster to use glBindTexture to bind an existing named texture to one of the texture targets than it is to reload the texture image using glTexImage1D or glTexImage2D . For additional control over performance, use glPrioritizeTextures .
glBindTexture is included in display lists.
Specifies the target to which the texture is bound. Must be either GL_TEXTURE_1D or GL_TEXTURE_2D .
Specifies the name of a texture.
GL_INVALID_ENUM is generated if target is not one of the allowable values.
GL_INVALID_OPERATION is generated if texture has a dimensionality which doesn't match that of target.
GL_INVALID_OPERATION is generated if glBindTexture is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glBlendFunc(int sfactor, int dfactor)
In RGBA mode, pixels can be drawn using a function that blends the incoming (source) RGBA values with the RGBA values that are already in the frame buffer (the destination values). Blending is initially disabled. Use glEnable and glDisable with argument GL_BLEND to enable and disable blending.
glBlendFunc defines the operation of blending when it is enabled. sfactor specifies which of nine methods is used to scale the source color components. dfactor specifies which of eight methods is used to scale the destination color components. The eleven possible methods are described in the following table. Each method defines four scale factors, one each for red, green, blue, and alpha.
In the table and in subsequent equations, source and destination color components are referred to as (R sub s , G sub s , B sub s , A sub s ) and (R sub d , G sub d , B sub d , A sub d ). They are understood to have integer values between 0 and (k sub R , k sub G , k sub B , k sub A ), where
.RS .ce k sub c ~=~ 2 sup m sub c - 1 .RE
and (m sub R , m sub G , m sub B , m sub A ) is the number of red, green, blue, and alpha bitplanes.
Source and destination scale factors are referred to as (s sub R , s sub G , s sub B , s sub A ) and (d sub R , d sub G , d sub B , d sub A ). The scale factors described in the table, denoted (f sub R , f sub G , f sub B , f sub A ), represent either source or destination factors. All scale factors have range [0,1].
.TS center box ; ci | ci c | c . parameter (f sub R , ~~ f sub G , ~~ f sub B , ~~ f sub A ) = GL_ZERO (0, ~0, ~0, ~0 ) GL_ONE (1, ~1, ~1, ~1 ) GL_SRC_COLOR (R sub s / k sub R , ~G sub s / k sub G , ~B sub s / k sub B , ~A sub s / k sub A ) GL_ONE_MINUS_SRC_COLOR (1, ~1, ~1, ~1 ) ~-~ (R sub s / k sub R , ~G sub s / k sub G , ~B sub s / k sub B , ~A sub s / k sub A ) GL_DST_COLOR (R sub d / k sub R , ~G sub d / k sub G , ~B sub d / k sub B , ~A sub d / k sub A ) GL_ONE_MINUS_DST_COLOR (1, ~1, ~1, ~1 ) ~-~ (R sub d / k sub R , ~G sub d / k sub G , ~B sub d / k sub B , ~A sub d / k sub A ) GL_SRC_ALPHA (A sub s / k sub A , ~A sub s / k sub A , ~A sub s / k sub A , ~A sub s / k sub A ) GL_ONE_MINUS_SRC_ALPHA (1, ~1, ~1, ~1 ) ~-~ (A sub s / k sub A , ~A sub s / k sub A , ~A sub s / k sub A , ~A sub s / k sub A ) GL_DST_ALPHA (A sub d / k sub A , ~A sub d / k sub A , ~A sub d / k sub A , ~A sub d / k sub A ) GL_ONE_MINUS_DST_ALPHA (1, ~1, ~1, ~1 ) ~-~ (A sub d / k sub A , ~A sub d / k sub A , ~A sub d / k sub A , ~A sub d / k sub A ) GL_SRC_ALPHA_SATURATE (i, ~i, ~i, ~1 ) .TE .sp In the table,
.RS .nf
i ~=~ min (A sub s , ~k sub A - A sub d ) ~/~ k sub A .fi .RE
To determine the blended RGBA values of a pixel when drawing in RGBA mode, the system uses the following equations:
.RS .nf
R sub d ~=~ min ( k sub R , ~~ R sub s s sub R + R sub d d sub R ) G sub d ~=~ min ( k sub G , ~~ G sub s s sub G + G sub d d sub G ) B sub d ~=~ min ( k sub B , ~~ B sub s s sub B + B sub d d sub B ) A sub d ~=~ min ( k sub A , ~~ A sub s s sub A + A sub d d sub A ) .fi .RE
Despite the apparent precision of the above equations, blending arithmetic is not exactly specified, because blending operates with imprecise integer color values. However, a blend factor that should be equal to 1 is guaranteed not to modify its multiplicand, and a blend factor equal to 0 reduces its multiplicand to 0. For example, when sfactor is GL_SRC_ALPHA , dfactor is GL_ONE_MINUS_SRC_ALPHA , and A sub s is equal to k sub A, the equations reduce to simple replacement:
.RS .nf
R sub d ~=~ R sub s G sub d ~=~ G sub s B sub d ~=~ B sub s A sub d ~=~ A sub s .fi .RE
Specifies how the red, green, blue, and alpha source blending factors are computed. Nine symbolic constants are accepted: GL_ZERO , GL_ONE , GL_DST_COLOR , GL_ONE_MINUS_DST_COLOR , GL_SRC_ALPHA , GL_ONE_MINUS_SRC_ALPHA , GL_DST_ALPHA , GL_ONE_MINUS_DST_ALPHA , and GL_SRC_ALPHA_SATURATE . The initial value is GL_ONE .
Specifies how the red, green, blue, and alpha destination blending factors are computed. Eight symbolic constants are accepted: GL_ZERO , GL_ONE , GL_SRC_COLOR , GL_ONE_MINUS_SRC_COLOR , GL_SRC_ALPHA , GL_ONE_MINUS_SRC_ALPHA , GL_DST_ALPHA , and GL_ONE_MINUS_DST_ALPHA . The initial value is GL_ZERO .
GL_INVALID_ENUM is generated if either sfactor or dfactor is not an accepted value.
GL_INVALID_OPERATION is generated if glBlendFunc is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glCallList(int list)
glCallList causes the named display list to be executed. The commands saved in the display list are executed in order, just as if they were called without using a display list. If list has not been defined as a display list, glCallList is ignored.
glCallList can appear inside a display list. To avoid the possibility of infinite recursion resulting from display lists calling one another, a limit is placed on the nesting level of display lists during display-list execution. This limit is at least 64, and it depends on the implementation.
GL state is not saved and restored across a call to glCallList . Thus, changes made to GL state during the execution of a display list remain after execution of the display list is completed. Use glPushAttrib , glPopAttrib , glPushMatrix , and glPopMatrix to preserve GL state across glCallList calls.
Specifies the integer name of the display list to be executed.
void GL.glClear(int mask)
glClear sets the bitplane area of the window to values previously selected by glClearColor , glClearIndex , glClearDepth , glClearStencil , and glClearAccum . Multiple color buffers can be cleared simultaneously by selecting more than one buffer at a time using glDrawBuffer .
The pixel ownership test, the scissor test, dithering, and the buffer writemasks affect the operation of glClear . The scissor box bounds the cleared region. Alpha function, blend function, logical operation, stenciling, texture mapping, and depth-buffering are ignored by glClear .
glClear takes a single argument that is the bitwise OR of several values indicating which buffer is to be cleared.
The values are as follows:
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The value to which each buffer is cleared depends on the setting of the clear value for that buffer.
Bitwise OR of masks that indicate the buffers to be cleared. The four masks are GL_COLOR_BUFFER_BIT , GL_DEPTH_BUFFER_BIT , GL_ACCUM_BUFFER_BIT , and GL_STENCIL_BUFFER_BIT .
GL_INVALID_VALUE is generated if any bit other than the four defined bits is set in mask.
GL_INVALID_OPERATION is generated if glClear is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glClearAccum(float|array(float) red, float|void green, float|void blue, float|void alpha)
glClearAccum specifies the red, green, blue, and alpha values used by glClear to clear the accumulation buffer.
Values specified by glClearAccum are clamped to the range [-1,1].
Specify the red, green, blue, and alpha values used when the accumulation buffer is cleared. The initial values are all 0.
GL_INVALID_OPERATION is generated if glClearAccum is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glClearColor(float|array(float) red, float|void green, float|void blue, float|void alpha)
glClearColor specifies the red, green, blue, and alpha values used by glClear to clear the color buffers. Values specified by glClearColor are clamped to the range [0,1].
Specify the red, green, blue, and alpha values used when the color buffers are cleared. The initial values are all 0.
GL_INVALID_OPERATION is generated if glClearColor is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glClearDepth(float depth)
glClearDepth specifies the depth value used by glClear to clear the depth buffer. Values specified by glClearDepth are clamped to the range [0,1].
Specifies the depth value used when the depth buffer is cleared. The initial value is 1.
GL_INVALID_OPERATION is generated if glClearDepth is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glClearIndex(float c)
glClearIndex specifies the index used by glClear to clear the color index buffers. c is not clamped. Rather, c is converted to a fixed-point value with unspecified precision to the right of the binary point. The integer part of this value is then masked with 2 sup m -1, where m is the number of bits in a color index stored in the frame buffer.
Specifies the index used when the color index buffers are cleared. The initial value is 0.
GL_INVALID_OPERATION is generated if glClearIndex is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glClearStencil(int s)
glClearStencil specifies the index used by glClear to clear the stencil buffer. s is masked with 2 sup m - 1, where m is the number of bits in the stencil buffer.
Specifies the index used when the stencil buffer is cleared. The initial value is 0.
GL_INVALID_OPERATION is generated if glClearStencil is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glColor(float|int red, float|int green, float|int blue, float|int|void alpha)
void GL.glColor(array(float|int) rgb)
The GL stores both a current single-valued color index and a current four-valued RGBA color. If no alpha value has been give, 1.0 (full intensity) is implied.
Current color values are stored in floating-point format, with unspecified mantissa and exponent sizes. Unsigned integer color components, when specified, are linearly mapped to floating-point values such that the largest representable value maps to 1.0 (full intensity), and 0 maps to 0.0 (zero intensity). Signed integer color components, when specified, are linearly mapped to floating-point values such that the most positive representable value maps to 1.0, and the most negative representable value maps to -1.0. (Note that this mapping does not convert 0 precisely to 0.0.) Floating-point values are mapped directly.
Neither floating-point nor signed integer values are clamped to the range [0,1] before the current color is updated. However, color components are clamped to this range before they are interpolated or written into a color buffer.
Specify new red, green, and blue values for the current color.
Specifies a new alpha value for the current color.
void GL.glColorMask(int red, int green, int blue, int alpha)
glColorMask specifies whether the individual color components in the frame buffer can or cannot be written. If red is GL_FALSE , for example, no change is made to the red component of any pixel in any of the color buffers, regardless of the drawing operation attempted.
Changes to individual bits of components cannot be controlled. Rather, changes are either enabled or disabled for entire color components.
Specify whether red, green, blue, and alpha can or cannot be written into the frame buffer. The initial values are all GL_TRUE , indicating that the color components can be written.
GL_INVALID_OPERATION is generated if glColorMask is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glColorMaterial(int face, int mode)
glColorMaterial specifies which material parameters track the current color. When GL_COLOR_MATERIAL is enabled, the material parameter or parameters specified by mode, of the material or materials specified by face, track the current color at all times.
To enable and disable GL_COLOR_MATERIAL , call glEnable and glDisable with argument GL_COLOR_MATERIAL . GL_COLOR_MATERIAL is initially disabled.
Specifies whether front, back, or both front and back material parameters should track the current color. Accepted values are GL_FRONT , GL_BACK , and GL_FRONT_AND_BACK . The initial value is GL_FRONT_AND_BACK .
Specifies which of several material parameters track the current color. Accepted values are GL_EMISSION , GL_AMBIENT , GL_DIFFUSE , GL_SPECULAR , and GL_AMBIENT_AND_DIFFUSE . The initial value is GL_AMBIENT_AND_DIFFUSE .
GL_INVALID_ENUM is generated if face or mode is not an accepted value.
GL_INVALID_OPERATION is generated if glColorMaterial is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glCopyPixels(int x, int y, int width, int height, int type)
glCopyPixels copies a screen-aligned rectangle of pixels from the specified frame buffer location to a region relative to the current raster position. Its operation is well defined only if the entire pixel source region is within the exposed portion of the window. Results of copies from outside the window, or from regions of the window that are not exposed, are hardware dependent and undefined.
x and y specify the window coordinates of the lower left corner of the rectangular region to be copied. width and height specify the dimensions of the rectangular region to be copied. Both width and height must not be negative.
Several parameters control the processing of the pixel data while it is being copied. These parameters are set with three commands: glPixelTransfer , glPixelMap , and glPixelZoom . This reference page describes the effects on glCopyPixels of most, but not all, of the parameters specified by these three commands.
glCopyPixels copies values from each pixel with the lower left-hand corner at (x + i, y + j) for 0\(<=i<width and 0\(<=j<height. This pixel is said to be the ith pixel in the jth row. Pixels are copied in row order from the lowest to the highest row, left to right in each row.
type specifies whether color, depth, or stencil data is to be copied. The details of the transfer for each data type are as follows:
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The rasterization described thus far assumes pixel zoom factors of 1.0. If
glPixelZoom is used to change the x and y pixel zoom factors, pixels are converted to fragments as follows. If (x sub r, y sub r) is the current raster position, and a given pixel is in the ith location in the jth row of the source pixel rectangle, then fragments are generated for pixels whose centers are in the rectangle with corners at
.ce (x sub r + zoom sub x i, y sub r + zoom sub y j) .sp .5 .ce and .sp .5 .ce (x sub r + zoom sub x (i + 1), y sub r + zoom sub y ( j + 1 ))
where zoom sub x is the value of GL_ZOOM_X and zoom sub y is the value of GL_ZOOM_Y .
Specify the window coordinates of the lower left corner of the rectangular region of pixels to be copied.
Specify the dimensions of the rectangular region of pixels to be copied. Both must be nonnegative.
Specifies whether color values, depth values, or stencil values are to be copied. Symbolic constants GL_COLOR , GL_DEPTH , and GL_STENCIL are accepted.
GL_INVALID_ENUM is generated if type is not an accepted value.
GL_INVALID_VALUE is generated if either width or height is negative.
GL_INVALID_OPERATION is generated if type is GL_DEPTH and there is no depth buffer.
GL_INVALID_OPERATION is generated if type is GL_STENCIL and there is no stencil buffer.
GL_INVALID_OPERATION is generated if glCopyPixels is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glCopyTexImage1D(int target, int level, int internalFormat, int x, int y, int width, int border)
glCopyTexImage1D defines a one-dimensional texture image with pixels from the current GL_READ_BUFFER .
The screen-aligned pixel row with left corner at ("x", "y") and with a length of "width"~+~2~*~"border" defines the texture array at the mipmap level specified by level. internalFormat specifies the internal format of the texture array.
The pixels in the row are processed exactly as if glCopyPixels had been called, but the process stops just before final conversion. At this point all pixel component values are clamped to the range [0,\ 1] and then converted to the texture's internal format for storage in the texel array.
Pixel ordering is such that lower x screen coordinates correspond to lower texture coordinates.
If any of the pixels within the specified row of the current GL_READ_BUFFER are outside the window associated with the current rendering context, then the values obtained for those pixels are undefined.
Specifies the target texture. Must be GL_TEXTURE_1D .
Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap reduction image.
Specifies the internal format of the texture. Must be one of the following symbolic constants: GL_ALPHA , GL_ALPHA4 , GL_ALPHA8 , GL_ALPHA12 , GL_ALPHA16 , GL_LUMINANCE , GL_LUMINANCE4 , GL_LUMINANCE8 , GL_LUMINANCE12 , GL_LUMINANCE16 , GL_LUMINANCE_ALPHA , GL_LUMINANCE4_ALPHA4 , GL_LUMINANCE6_ALPHA2 , GL_LUMINANCE8_ALPHA8 , GL_LUMINANCE12_ALPHA4 , GL_LUMINANCE12_ALPHA12 , GL_LUMINANCE16_ALPHA16 , GL_INTENSITY , GL_INTENSITY4 , GL_INTENSITY8 , GL_INTENSITY12 , GL_INTENSITY16 , GL_RGB , GL_R3_G3_B2 , GL_RGB4 , GL_RGB5 , GL_RGB8 , GL_RGB10 , GL_RGB12 , GL_RGB16 , GL_RGBA , GL_RGBA2 , GL_RGBA4 , GL_RGB5_A1 , GL_RGBA8 , GL_RGB10_A2 , GL_RGBA12 , or GL_RGBA16 .
Specify the window coordinates of the left corner of the row of pixels to be copied.
Specifies the width of the texture image. Must be 0 or 2**n ~+~ 2*border for some integer n. The height of the texture image is 1.
Specifies the width of the border. Must be either 0 or 1.
GL_INVALID_ENUM is generated if target is not one of the allowable values.
GL_INVALID_VALUE is generated if level is less than 0. .P GL_INVALID_VALUE may be generated if level is greater than log sub 2 max, where max is the returned value of GL_MAX_TEXTURE_SIZE . .P GL_INVALID_VALUE is generated if internalFormat is not an allowable value.
GL_INVALID_VALUE is generated if width is less than 0 or greater than 2 + GL_MAX_TEXTURE_SIZE , or if it cannot be represented as 2 ** n ~+~ 2~*~("border") for some integer value of n.
GL_INVALID_VALUE is generated if border is not 0 or 1.
GL_INVALID_OPERATION is generated if glCopyTexImage1D is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glCopyTexImage2D(int target, int level, int internalFormat, int x, int y, int width, int height, int border)
glCopyTexImage2D defines a two-dimensional texture image with pixels from the current GL_READ_BUFFER .
The screen-aligned pixel rectangle with lower left corner at (x, y) and with a width of width~+~2~*~border and a height of height~+~2~*~border defines the texture array at the mipmap level specified by level. internalFormat specifies the internal format of the texture array.
The pixels in the rectangle are processed exactly as if glCopyPixels had been called, but the process stops just before final conversion. At this point all pixel component values are clamped to the range [0,1] and then converted to the texture's internal format for storage in the texel array.
Pixel ordering is such that lower x and y screen coordinates correspond to lower s and t texture coordinates.
If any of the pixels within the specified rectangle of the current GL_READ_BUFFER are outside the window associated with the current rendering context, then the values obtained for those pixels are undefined.
Specifies the target texture. Must be GL_TEXTURE_2D .
Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap reduction image.
Specifies the internal format of the texture. Must be one of the following symbolic constants: GL_ALPHA , GL_ALPHA4 , GL_ALPHA8 , GL_ALPHA12 , GL_ALPHA16 , GL_LUMINANCE , GL_LUMINANCE4 , GL_LUMINANCE8 , GL_LUMINANCE12 , GL_LUMINANCE16 , GL_LUMINANCE_ALPHA , GL_LUMINANCE4_ALPHA4 , GL_LUMINANCE6_ALPHA2 , GL_LUMINANCE8_ALPHA8 , GL_LUMINANCE12_ALPHA4 , GL_LUMINANCE12_ALPHA12 , GL_LUMINANCE16_ALPHA16 , GL_INTENSITY , GL_INTENSITY4 , GL_INTENSITY8 , GL_INTENSITY12 , GL_INTENSITY16 , GL_RGB , GL_R3_G3_B2 , GL_RGB4 , GL_RGB5 , GL_RGB8 , GL_RGB10 , GL_RGB12 , GL_RGB16 , GL_RGBA , GL_RGBA2 , GL_RGBA4 , GL_RGB5_A1 , GL_RGBA8 , GL_RGB10_A2 , GL_RGBA12 , or GL_RGBA16 .
Specify the window coordinates of the lower left corner of the rectangular region of pixels to be copied.
Specifies the width of the texture image. Must be 0 or 2**n ~+~ 2*border for some integer n.
Specifies the height of the texture image. Must be 0 or 2**m ~+~ 2*border for some integer m.
Specifies the width of the border. Must be either 0 or 1.
GL_INVALID_ENUM is generated if target is not GL_TEXTURE_2D .
GL_INVALID_VALUE is generated if level is less than 0. .P GL_INVALID_VALUE may be generated if level is greater than log sub 2 max, where max is the returned value of GL_MAX_TEXTURE_SIZE .
GL_INVALID_VALUE is generated if width or height is less than 0, greater than 2~+~GL_MAX_TEXTURE_SIZE , or if width or height cannot be represented as 2**k ~+~ 2~*~border for some integer k.
GL_INVALID_VALUE is generated if border is not 0 or 1.
GL_INVALID_VALUE is generated if internalFormat is not one of the allowable values.
GL_INVALID_OPERATION is generated if glCopyTexImage2D is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glCopyTexSubImage1D(int target, int level, int xoffset, int x, int y, int width)
glCopyTexSubImage1D replaces a portion of a one-dimensional texture image with pixels from the current GL_READ_BUFFER (rather than from main memory, as is the case for glTexSubImage1D ).
The screen-aligned pixel row with left corner at (x,\ y), and with length width replaces the portion of the texture array with x indices xoffset through "xoffset" ~+~ "width" ~-~ 1, inclusive. The destination in the texture array may not include any texels outside the texture array as it was originally specified.
The pixels in the row are processed exactly as if glCopyPixels had been called, but the process stops just before final conversion. At this point all pixel component values are clamped to the range [0,\ 1] and then converted to the texture's internal format for storage in the texel array.
It is not an error to specify a subtexture with zero width, but such a specification has no effect. If any of the pixels within the specified row of the current GL_READ_BUFFER are outside the read window associated with the current rendering context, then the values obtained for those pixels are undefined.
No change is made to the internalformat, width, or border parameters of the specified texture array or to texel values outside the specified subregion.
Specifies the target texture. Must be GL_TEXTURE_1D .
Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap reduction image.
Specifies the texel offset within the texture array.
Specify the window coordinates of the left corner of the row of pixels to be copied.
Specifies the width of the texture subimage.
GL_INVALID_ENUM is generated if target is not GL_TEXTURE_1D .
GL_INVALID_OPERATION is generated if the texture array has not been defined by a previous glTexImage1D or glCopyTexImage1D operation.
GL_INVALID_VALUE is generated if level is less than 0. .P GL_INVALID_VALUE may be generated if level>log sub 2 max, where max is the returned value of GL_MAX_TEXTURE_SIZE .
GL_INVALID_VALUE is generated if y ~<~ ~-b or if width ~<~ ~-b, where b is the border width of the texture array.
GL_INVALID_VALUE is generated if "xoffset" ~<~ ~-b, or ("xoffset"~+~"width") ~>~ (w-b), where w is the GL_TEXTURE_WIDTH , and b is the GL_TEXTURE_BORDER of the texture image being modified. Note that w includes twice the border width.
void GL.glCopyTexSubImage2D(int target, int level, int xoffset, int yoffset, int x, int y, int width, int height)
glCopyTexSubImage2D replaces a rectangular portion of a two-dimensional texture image with pixels from the current GL_READ_BUFFER (rather than from main memory, as is the case for glTexSubImage2D ).
The screen-aligned pixel rectangle with lower left corner at (x,\ y) and with width width and height height replaces the portion of the texture array with x indices xoffset through xoffset~+~width~-~1, inclusive, and y indices yoffset through yoffset~+~height~-~1, inclusive, at the mipmap level specified by level.
The pixels in the rectangle are processed exactly as if glCopyPixels had been called, but the process stops just before final conversion. At this point, all pixel component values are clamped to the range [0,\ 1] and then converted to the texture's internal format for storage in the texel array.
The destination rectangle in the texture array may not include any texels outside the texture array as it was originally specified. It is not an error to specify a subtexture with zero width or height, but such a specification has no effect.
If any of the pixels within the specified rectangle of the current GL_READ_BUFFER are outside the read window associated with the current rendering context, then the values obtained for those pixels are undefined.
No change is made to the internalformat, width, height, or border parameters of the specified texture array or to texel values outside the specified subregion.
Specifies the target texture. Must be GL_TEXTURE_2D
Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap reduction image.
Specifies a texel offset in the x direction within the texture array.
Specifies a texel offset in the y direction within the texture array.
Specify the window coordinates of the lower left corner of the rectangular region of pixels to be copied.
Specifies the width of the texture subimage.
Specifies the height of the texture subimage.
GL_INVALID_ENUM is generated if target is not GL_TEXTURE_2D .
GL_INVALID_OPERATION is generated if the texture array has not been defined by a previous glTexImage2D or glCopyTexImage2D operation.
GL_INVALID_VALUE is generated if level is less than 0. .P GL_INVALID_VALUE may be generated if level is greater than log sub 2 max, where max is the returned value of GL_MAX_TEXTURE_SIZE .
GL_INVALID_VALUE is generated if x ~<~ ~-b or if y ~<~ ~-b, where b is the border width of the texture array.
GL_INVALID_VALUE is generated if "xoffset" ~<~ -b, (xoffset~+~width)~>~(w ~-~b), yoffset~<~ ~-b, or (yoffset~+~height)~>~(h ~-~b), where w is the GL_TEXTURE_WIDTH , h is the GL_TEXTURE_HEIGHT , and b is the GL_TEXTURE_BORDER of the texture image being modified. Note that w and h include twice the border width.
GL_INVALID_OPERATION is generated if glCopyTexSubImage2D is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glDeleteLists(int list, int range)
glDeleteLists causes a contiguous group of display lists to be deleted. list is the name of the first display list to be deleted, and range is the number of display lists to delete. All display lists \fId\fP with list \(<= \fId\fP \(<= list + range - 1 are deleted.
All storage locations allocated to the specified display lists are freed, and the names are available for reuse at a later time. Names within the range that do not have an associated display list are ignored. If range is 0, nothing happens.
Specifies the integer name of the first display list to delete.
Specifies the number of display lists to delete.
GL_INVALID_VALUE is generated if range is negative.
GL_INVALID_OPERATION is generated if glDeleteLists is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glDepthMask(int flag)
glDepthMask specifies whether the depth buffer is enabled for writing. If flag is GL_FALSE , depth buffer writing is disabled. Otherwise, it is enabled. Initially, depth buffer writing is enabled.
Specifies whether the depth buffer is enabled for writing. If flag is GL_FALSE , depth buffer writing is disabled. Otherwise, it is enabled. Initially, depth buffer writing is enabled.
GL_INVALID_OPERATION is generated if glDepthMask is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glDepthRange(float zNear, float zFar)
After clipping and division by w, depth coordinates range from -1 to 1, corresponding to the near and far clipping planes. glDepthRange specifies a linear mapping of the normalized depth coordinates in this range to window depth coordinates. Regardless of the actual depth buffer implementation, window coordinate depth values are treated as though they range from 0 through 1 (like color components). Thus, the values accepted by glDepthRange are both clamped to this range before they are accepted.
The setting of (0,1) maps the near plane to 0 and the far plane to 1. With this mapping, the depth buffer range is fully utilized.
Specifies the mapping of the near clipping plane to window coordinates. The initial value is 0.
Specifies the mapping of the far clipping plane to window coordinates. The initial value is 1.
GL_INVALID_OPERATION is generated if glDepthRange is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glDrawArrays(int mode, int first, int count)
glDrawArrays specifies multiple geometric primitives with very few subroutine calls. Instead of calling a GL procedure to pass each individual vertex, normal, texture coordinate, edge flag, or color, you can prespecify separate arrays of vertexes, normals, and colors and use them to construct a sequence of primitives with a single call to glDrawArrays .
When glDrawArrays is called, it uses count sequential elements from each enabled array to construct a sequence of geometric primitives, beginning with element first. mode specifies what kind of primitives are constructed, and how the array elements construct those primitives. If GL_VERTEX_ARRAY is not enabled, no geometric primitives are generated.
Vertex attributes that are modified by glDrawArrays have an unspecified value after glDrawArrays returns. For example, if GL_COLOR_ARRAY is enabled, the value of the current color is undefined after glDrawArrays executes. Attributes that aren't modified remain well defined.
Specifies what kind of primitives to render. Symbolic constants GL_POINTS , GL_LINE_STRIP , GL_LINE_LOOP , GL_LINES , GL_TRIANGLE_STRIP , GL_TRIANGLE_FAN , GL_TRIANGLES , GL_QUAD_STRIP , GL_QUADS , and GL_POLYGON are accepted.
Specifies the starting index in the enabled arrays.
Specifies the number of indices to be rendered.
GL_INVALID_ENUM is generated if mode is not an accepted value.
GL_INVALID_VALUE is generated if count is negative.
GL_INVALID_OPERATION is generated if glDrawArrays is executed between the execution of glBegin and the corresponding glEnd .
void GL.glDrawPixels(object|mapping(string:object) width, object|mapping(string:object) height, object|mapping(string:object) format, object|mapping(string:object) type, array(object|mapping(string:object)) pixels)
glDrawPixels reads pixel data from memory and writes it into the frame buffer relative to the current raster position. Use glRasterPos to set the current raster position; use glGet with argument GL_CURRENT_RASTER_POSITION to query the raster position.
Several parameters define the encoding of pixel data in memory and control the processing of the pixel data before it is placed in the frame buffer. These parameters are set with four commands: glPixelStore , glPixelTransfer , glPixelMap , and glPixelZoom . This reference page describes the effects on glDrawPixels of many, but not all, of the parameters specified by these four commands.
Data is read from pixels as a sequence of signed or unsigned bytes, signed or unsigned shorts, signed or unsigned integers, or single-precision floating-point values, depending on type. Each of these bytes, shorts, integers, or floating-point values is interpreted as one color or depth component, or one index, depending on format. Indices are always treated individually. Color components are treated as groups of one, two, three, or four values, again based on format. Both individual indices and groups of components are referred to as pixels. If type is GL_BITMAP , the data must be unsigned bytes, and format must be either GL_COLOR_INDEX or GL_STENCIL_INDEX . Each unsigned byte is treated as eight 1-bit pixels, with bit ordering determined by GL_UNPACK_LSB_FIRST (see glPixelStore ).
widthtimesheight pixels are read from memory, starting at location pixels. By default, these pixels are taken from adjacent memory locations, except that after all width pixels are read, the read pointer is advanced to the next four-byte boundary. The four-byte row alignment is specified by glPixelStore with argument GL_UNPACK_ALIGNMENT , and it can be set to one, two, four, or eight bytes. Other pixel store parameters specify different read pointer advancements, both before the first pixel is read and after all width pixels are read. See the
glPixelStore reference page for details on these options.
The widthtimesheight pixels that are read from memory are each operated on in the same way, based on the values of several parameters specified by glPixelTransfer and glPixelMap . The details of these operations, as well as the target buffer into which the pixels are drawn, are specific to the format of the pixels, as specified by format. format can assume one of eleven symbolic values:
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.RS .ce x sub n ~=~ x sub r ~+~ n ~ roman mod ~ "width" .sp .ce y sub n ~=~ y sub r ~+~ \(lf ~ n / "width" ~ \(rf .fi .sp .RE
where (x sub r , y sub r) is the current raster position. Only the pixel ownership test, the scissor test, and the stencil writemask affect these write operations.
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.RS .ce x sub n ~=~ x sub r ~+~ n ~ roman mod ~ "width" .sp .ce y sub n ~=~ y sub r ~+~ \(lf ~ n / "width" ~ \(rf .ce 0 .sp .RE
where (x sub r , y sub r) is the current raster position. These pixel fragments are then treated just like the fragments generated by rasterizing points, lines, or polygons. Texture mapping, fog, and all the fragment operations are applied before the fragments are written to the frame buffer.
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.RS .ce x sub n ~=~ x sub r ~+~ n ~ roman mod ~ "width" .sp .ce y sub n ~=~ y sub r ~+~ \(lf ~ n / "width" ~ \(rf .ce 0 .sp .RE
where (x sub r , y sub r) is the current raster position. These pixel fragments are then treated just like the fragments generated by rasterizing points, lines, or polygons. Texture mapping, fog, and all the fragment operations are applied before the fragments are written to the frame buffer.
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The following table summarizes the meaning of the valid constants for the type parameter: .sp 2 .TS center box ; ci | ci c | c . type corresponding type = GL_UNSIGNED_BYTE unsigned 8-bit integer GL_BYTE signed 8-bit integer GL_BITMAP single bits in unsigned 8-bit integers GL_UNSIGNED_SHORT unsigned 16-bit integer GL_SHORT signed 16-bit integer GL_UNSIGNED_INT unsigned 32-bit integer GL_INT 32-bit integer GL_FLOAT single-precision floating-point .TE .sp
The rasterization described so far assumes pixel zoom factors of 1. If
glPixelZoom is used to change the x and y pixel zoom factors, pixels are converted to fragments as follows. If (x sub r, y sub r) is the current raster position, and a given pixel is in the nth column and mth row of the pixel rectangle, then fragments are generated for pixels whose centers are in the rectangle with corners at .sp .RS .ce (x sub r + zoom sub x n, y sub r + zoom sub y m) .sp .ce (x sub r + zoom sub x (n + 1), y sub r + zoom sub y ( m + 1 )) .ce 0 .sp .RE
where zoom sub x is the value of GL_ZOOM_X and zoom sub y is the value of GL_ZOOM_Y .
Specify the dimensions of the pixel rectangle to be written into the frame buffer.
Specifies the format of the pixel data. Symbolic constants GL_COLOR_INDEX , GL_STENCIL_INDEX , GL_DEPTH_COMPONENT , GL_RGBA , GL_RED , GL_GREEN , GL_BLUE , GL_ALPHA , GL_RGB , GL_LUMINANCE , and GL_LUMINANCE_ALPHA are accepted.
Specifies the data type for pixels. Symbolic constants GL_UNSIGNED_BYTE , GL_BYTE , GL_BITMAP , GL_UNSIGNED_SHORT , GL_SHORT , GL_UNSIGNED_INT , GL_INT , and GL_FLOAT are accepted.
Specifies a pointer to the pixel data.
GL_INVALID_VALUE is generated if either width or height is negative.
GL_INVALID_ENUM is generated if format or type is not one of the accepted values.
GL_INVALID_OPERATION is generated if format is GL_RED , GL_GREEN , GL_BLUE , GL_ALPHA , GL_RGB , GL_RGBA , GL_LUMINANCE , or GL_LUMINANCE_ALPHA , and the GL is in color index mode.
GL_INVALID_ENUM is generated if type is GL_BITMAP and format is not either GL_COLOR_INDEX or GL_STENCIL_INDEX .
GL_INVALID_OPERATION is generated if format is GL_STENCIL_INDEX and there is no stencil buffer.
GL_INVALID_OPERATION is generated if glDrawPixels is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glEdgeFlag(int flag)
Each vertex of a polygon, separate triangle, or separate quadrilateral specified between a glBegin /glEnd pair is marked as the start of either a boundary or nonboundary edge. If the current edge flag is true when the vertex is specified, the vertex is marked as the start of a boundary edge. Otherwise, the vertex is marked as the start of a nonboundary edge. glEdgeFlag sets the edge flag bit to GL_TRUE if flag is GL_TRUE , and to GL_FALSE otherwise.
The vertices of connected triangles and connected quadrilaterals are always marked as boundary, regardless of the value of the edge flag.
Boundary and nonboundary edge flags on vertices are significant only if GL_POLYGON_MODE is set to GL_POINT or GL_LINE . See glPolygonMode .
Specifies the current edge flag value, either GL_TRUE or GL_FALSE . The initial value is GL_TRUE .
Specifies a pointer to an array that contains a single boolean element, which replaces the current edge flag value.
void GL.glEvalCoord(float|int|array(float|int) u, float|int|void v)
glEvalCoord evaluates enabled one-dimensional maps at argument u or two-dimensional maps using two domain values, u and v . To define a map, call glMap1 and glMap2 ; to enable and disable it, call glEnable and glDisable .
When one of the glEvalCoord commands is issued, all currently enabled maps of the indicated dimension are evaluated. Then, for each enabled map, it is as if the corresponding GL command had been issued with the computed value. That is, if GL_MAP1_INDEX or GL_MAP2_INDEX is enabled, a glIndex command is simulated. If GL_MAP1_COLOR_4 or GL_MAP2_COLOR_4 is enabled, a glColor command is simulated. If GL_MAP1_NORMAL or GL_MAP2_NORMAL is enabled, a normal vector is produced, and if any of GL_MAP1_TEXTURE_COORD_1 , GL_MAP1_TEXTURE_COORD_2 , GL_MAP1_TEXTURE_COORD_3 , GL_MAP1_TEXTURE_COORD_4 , GL_MAP2_TEXTURE_COORD_1 , GL_MAP2_TEXTURE_COORD_2 , GL_MAP2_TEXTURE_COORD_3 , or GL_MAP2_TEXTURE_COORD_4 is enabled, then an appropriate glTexCoord command is simulated.
For color, color index, normal, and texture coordinates the GL uses evaluated values instead of current values for those evaluations that are enabled, and current values otherwise, However, the evaluated values do not update the current values. Thus, if glVertex commands are interspersed with glEvalCoord commands, the color, normal, and texture coordinates associated with the glVertex commands are not affected by the values generated by the glEvalCoord commands, but only by the most recent glColor , glIndex , glNormal , and glTexCoord commands.
No commands are issued for maps that are not enabled. If more than one texture evaluation is enabled for a particular dimension (for example, GL_MAP2_TEXTURE_COORD_1 and GL_MAP2_TEXTURE_COORD_2 ), then only the evaluation of the map that produces the larger number of coordinates (in this case, GL_MAP2_TEXTURE_COORD_2 ) is carried out. GL_MAP1_VERTEX_4 overrides GL_MAP1_VERTEX_3 , and GL_MAP2_VERTEX_4 overrides GL_MAP2_VERTEX_3 , in the same manner. If neither a three- nor a four-component vertex map is enabled for the specified dimension, the glEvalCoord command is ignored.
If you have enabled automatic normal generation, by calling glEnable with argument GL_AUTO_NORMAL , glEvalCoord generates surface normals analytically, regardless of the contents or enabling of the GL_MAP2_NORMAL map. Let .sp .nf Pp Pp m = -- X -- Pu Pv .sp .fi
Then the generated normal n is
n = m over ~ over { || m || }
.sp
If automatic normal generation is disabled, the corresponding normal map GL_MAP2_NORMAL , if enabled, is used to produce a normal. If neither automatic normal generation nor a normal map is enabled, no normal is generated for glEvalCoord commands.
Specifies a value that is the domain coordinate u to the basis function defined in a previous glMap1 or glMap2 command.
Specifies a value that is the domain coordinate v to the basis function defined in a previous glMap2 command.
Specifies a pointer to an array containing either one or two domain coordinates. The first coordinate is u. The second coordinate is v.
void GL.glEvalPoint(int|array(int) i, int|void j)
glMapGrid and glEvalMesh are used in tandem to efficiently generate and evaluate a series of evenly spaced map domain values. glEvalPoint can be used to evaluate a single grid point in the same gridspace that is traversed by glEvalMesh . Calling glEvalPoint is equivalent to calling .nf
glEvalCoord1(i . DELTA u + u ); 1 where
DELTA u = (u - u ) / n 2 1
and n, u , and u 1 2
.fi are the arguments to the most recent glMapGrid1 command. The one absolute numeric requirement is that if i~=~n, then the value computed from .nf i . DELTA u + u is exactly u . 1 2
.fi
In the two-dimensional case, glEvalPoint , let .nf DELTA u = (u - u )/n 2 1
DELTA v = (v - v )/m 2 1
where n, u , u , m, v , and v 1 2 1 2
.fi are the arguments to the most recent glMapGrid2 command. Then the glEvalPoint command is equivalent to calling .nf
glEvalCoord2(i . DELTA u + u , j . DELTA v + v ); 1 1
.fi The only absolute numeric requirements are that if i~=~n, then the value computed from .nf
i . DELTA u + u is exactly u , 1 2 .fi and if j~=~m, then the value computed from .nf
j cdot DELTA v + v is exactly v . 1 2
Specifies the integer value for grid domain variable i.
Specifies the integer value for grid domain variable j (glEvalPoint only).
void GL.glFog(int pname, float|int|array(float|int) param)
Fog is initially disabled. While enabled, fog affects rasterized geometry, bitmaps, and pixel blocks, but not buffer clear operations. To enable and disable fog, call glEnable and glDisable with argument GL_FOG .
glFog assigns the value or values in params to the fog parameter specified by pname. The following values are accepted for pname:
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Fog blends a fog color with each rasterized pixel fragment's posttexturing color using a blending factor f. Factor f is computed in one of three ways, depending on the fog mode. Let z be the distance in eye coordinates from the origin to the fragment being fogged. The equation for GL_LINEAR fog is .ce
.EQ f ~=~ {end ~-~ z} over {end ~-~ start} .EN
.RE
The equation for GL_EXP fog is .ce
.EQ f ~=~ e ** (-(density ~cdot~ z)) .EN
The equation for GL_EXP2 fog is .ce
.EQ f ~=~ e ** (-(density ~cdot~ z) ** 2) .EN
Regardless of the fog mode, f is clamped to the range [0,1] after it is computed. Then, if the GL is in RGBA color mode, the fragment's color C sub r is replaced by .sp .ce .EQ {C sub r} prime ~=~ f C sub r + (1 - f) C sub f .EN
In color index mode, the fragment's color index i sub r is replaced by .sp .ce .EQ {i sub r} prime ~=~ i sub r + (1 - f) i sub f .EN
Specifies a single-valued fog parameter. GL_FOG_MODE , GL_FOG_DENSITY , GL_FOG_START , GL_FOG_END , and GL_FOG_INDEX are accepted.
Specifies the value that pname will be set to.
Specifies a fog parameter. GL_FOG_MODE , GL_FOG_DENSITY , GL_FOG_START , GL_FOG_END , GL_FOG_INDEX , and GL_FOG_COLOR are accepted.
Specifies the value or values to be assigned to pname. GL_FOG_COLOR requires an array of four values. All other parameters accept an array containing only a single value.
GL_INVALID_ENUM is generated if pname is not an accepted value, or if pname is GL_FOG_MODE and params is not an accepted value.
GL_INVALID_VALUE is generated if pname is GL_FOG_DENSITY , and params is negative.
GL_INVALID_OPERATION is generated if glFog is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glFrustum(float left, float right, float bottom, float top, float zNear, float zFar)
glFrustum describes a perspective matrix that produces a perspective projection. The current matrix (see glMatrixMode ) is multiplied by this matrix and the result replaces the current matrix, as if glMultMatrix were called with the following matrix as its argument:
.sp 5 .ce .EQ down 130 {left ( ~~ matrix { ccol { {{2 ~ "zNear"} over {"right" - "left"}} above 0 above 0 above 0 } ccol { 0 above {{2 ~ "zNear"} over {"top" - "bottom"}} ~ above 0 above 0 } ccol { A ~~~~ above B ~~~~ above C ~~~~ above -1 ~~~~} ccol { 0 above 0 above D above 0} } ~~~ right )} .EN .sp .ce .EQ down 130 {A ~=~ {"right" + "left"} over {"right" - "left"}} .EN .sp .ce .EQ down 130 {B ~=~ {"top" + "bottom"} over {"top" - "bottom"}} .EN .sp .ce .EQ down 130 {C ~=~ -{{"zFar" + "zNear"} over {"zFar" - "zNear"}}} .EN .sp .ce .EQ down 130 {D ~=~ -{{2 ~ "zFar" ~ "zNear"} over {"zFar" - "zNear"}}} .EN .sp
Typically, the matrix mode is GL_PROJECTION , and (left, bottom, -zNear) and (right, top, -zNear) specify the points on the near clipping plane that are mapped to the lower left and upper right corners of the window, assuming that the eye is located at (0, 0, 0). -zFar specifies the location of the far clipping plane. Both zNear and zFar must be positive.
Use glPushMatrix and glPopMatrix to save and restore the current matrix stack.
Specify the coordinates for the left and right vertical clipping planes.
Specify the coordinates for the bottom and top horizontal clipping planes.
Specify the distances to the near and far depth clipping planes. Both distances must be positive.
GL_INVALID_VALUE is generated if zNear or zFar is not positive.
GL_INVALID_OPERATION is generated if glFrustum is executed between the execution of glBegin and the corresponding execution of glEnd .
int GL.glGenLists(int range)
glGenLists has one argument, range. It returns an integer n such that range contiguous empty display lists, named n, n+1, ..., n+range -1, are created. If range is 0, if there is no group of range contiguous names available, or if any error is generated, no display lists are generated, and 0 is returned.
Specifies the number of contiguous empty display lists to be generated.
GL_INVALID_VALUE is generated if range is negative.
GL_INVALID_OPERATION is generated if glGenLists is executed between the execution of glBegin and the corresponding execution of glEnd .
int GL.glGetError()
glGetError returns the value of the error flag. Each detectable error is assigned a numeric code and symbolic name. When an error occurs, the error flag is set to the appropriate error code value. No other errors are recorded until glGetError is called, the error code is returned, and the flag is reset to GL_NO_ERROR . If a call to glGetError returns GL_NO_ERROR , there has been no detectable error since the last call to glGetError , or since the GL was initialized.
To allow for distributed implementations, there may be several error flags. If any single error flag has recorded an error, the value of that flag is returned and that flag is reset to GL_NO_ERROR when glGetError is called. If more than one flag has recorded an error, glGetError returns and clears an arbitrary error flag value. Thus, glGetError should always be called in a loop, until it returns GL_NO_ERROR , if all error flags are to be reset.
Initially, all error flags are set to GL_NO_ERROR .
The following errors are currently defined:
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When an error flag is set, results of a GL operation are undefined only if GL_OUT_OF_MEMORY has occurred. In all other cases, the command generating the error is ignored and has no effect on the GL state or frame buffer contents. If the generating command returns a value, it returns 0. If glGetError itself generates an error, it returns 0.
GL_INVALID_OPERATION is generated if glGetError is executed between the execution of glBegin and the corresponding execution of glEnd . In this case glGetError returns 0.
string GL.glGetString(int name)
glGetString returns a pointer to a static string describing some aspect of the current GL connection. name can be one of the following:
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Because the GL does not include queries for the performance characteristics of an implementation, some applications are written to recognize known platforms and modify their GL usage based on known performance characteristics of these platforms. Strings GL_VENDOR and GL_RENDERER together uniquely specify a platform. They do not change from release to release and should be used by platform-recognition algorithms.
Some applications want to make use of features that are not part of the standard GL. These features may be implemented as extensions to the standard GL. The GL_EXTENSIONS string is a space-separated list of supported GL extensions. (Extension names never contain a space character.)
The GL_VERSION string begins with a version number. The version number uses one of these forms:
major_number.minor_number
major_number.minor_number.release_number
Vendor-specific information may follow the version number. Its format depends on the implementation, but a space always separates the version number and the vendor-specific information.
All strings are null-terminated.
Specifies a symbolic constant, one of GL_VENDOR , GL_RENDERER , GL_VERSION , or GL_EXTENSIONS .
GL_INVALID_ENUM is generated if name is not an accepted value.
GL_INVALID_OPERATION is generated if glGetString is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glHint(int target, int mode)
Certain aspects of GL behavior, when there is room for interpretation, can be controlled with hints. A hint is specified with two arguments. target is a symbolic constant indicating the behavior to be controlled, and mode is another symbolic constant indicating the desired behavior. The initial value for each target is GL_DONT_CARE . mode can be one of the following:
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Though the implementation aspects that can be hinted are well defined, the interpretation of the hints depends on the implementation. The hint aspects that can be specified with target, along with suggested semantics, are as follows:
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Specifies a symbolic constant indicating the behavior to be controlled. GL_FOG_HINT , GL_LINE_SMOOTH_HINT , GL_PERSPECTIVE_CORRECTION_HINT , GL_POINT_SMOOTH_HINT , and GL_POLYGON_SMOOTH_HINT are accepted.
Specifies a symbolic constant indicating the desired behavior. GL_FASTEST , GL_NICEST , and GL_DONT_CARE are accepted.
GL_INVALID_ENUM is generated if either target or mode is not an accepted value.
GL_INVALID_OPERATION is generated if glHint is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glIndex(float|int c)
glIndex updates the current (single-valued) color index. It takes one argument, the new value for the current color index.
The current index is stored as a floating-point value. Integer values are converted directly to floating-point values, with no special mapping. The initial value is 1.
Index values outside the representable range of the color index buffer are not clamped. However, before an index is dithered (if enabled) and written to the frame buffer, it is converted to fixed-point format. Any bits in the integer portion of the resulting fixed-point value that do not correspond to bits in the frame buffer are masked out.
Specifies the new value for the current color index.
Specifies a pointer to a one-element array that contains the new value for the current color index.
void GL.glIndexMask(int mask)
glIndexMask controls the writing of individual bits in the color index buffers. The least significant n bits of mask, where n is the number of bits in a color index buffer, specify a mask. Where a 1 (one) appears in the mask, it's possible to write to the corresponding bit in the color index buffer (or buffers). Where a 0 (zero) appears, the corresponding bit is write-protected.
This mask is used only in color index mode, and it affects only the buffers currently selected for writing (see glDrawBuffer ). Initially, all bits are enabled for writing.
Specifies a bit mask to enable and disable the writing of individual bits in the color index buffers. Initially, the mask is all 1's.
GL_INVALID_OPERATION is generated if glIndexMask is executed between the execution of glBegin and the corresponding execution of glEnd .
int GL.glIsEnabled(int cap)
glIsEnabled returns GL_TRUE if cap is an enabled capability and returns GL_FALSE otherwise. Initially all capabilities except GL_DITHER are disabled; GL_DITHER is initially enabled.
The following capabilities are accepted for cap:
.TS lb lb l l l. Constant See _
GL_ALPHA_TEST glAlphaFunc GL_AUTO_NORMAL glEvalCoord GL_BLEND glBlendFunc , glLogicOp GL_CLIP_PLANE iglClipPlane GL_COLOR_ARRAY glColorPointer GL_COLOR_LOGIC_OP glLogicOp GL_COLOR_MATERIAL glColorMaterial GL_CULL_FACE glCullFace GL_DEPTH_TEST glDepthFunc , glDepthRange GL_DITHER glEnable GL_EDGE_FLAG_ARRAY glEdgeFlagPointer GL_FOG glFog GL_INDEX_ARRAY glIndexPointer GL_INDEX_LOGIC_OP glLogicOp GL_LIGHT iglLightModel , glLight GL_LIGHTING glMaterial , glLightModel , glLight GL_LINE_SMOOTH glLineWidth GL_LINE_STIPPLE glLineStipple GL_MAP1_COLOR_4 glMap1 , glMap2 GL_MAP2_TEXTURE_COORD_2 glMap2 GL_MAP2_TEXTURE_COORD_3 glMap2 GL_MAP2_TEXTURE_COORD_4 glMap2 GL_MAP2_VERTEX_3 glMap2 GL_MAP2_VERTEX_4 glMap2 GL_NORMAL_ARRAY glNormalPointer GL_NORMALIZE glNormal GL_POINT_SMOOTH glPointSize GL_POLYGON_SMOOTH glPolygonMode GL_POLYGON_OFFSET_FILL glPolygonOffset GL_POLYGON_OFFSET_LINE glPolygonOffset GL_POLYGON_OFFSET_POINT glPolygonOffset GL_POLYGON_STIPPLE glPolygonStipple GL_SCISSOR_TEST glScissor GL_STENCIL_TEST glStencilFunc , glStencilOp GL_TEXTURE_1D glTexImage1D GL_TEXTURE_2D glTexImage2D GL_TEXTURE_COORD_ARRAY glTexCoordPointer GL_TEXTURE_GEN_Q glTexGen GL_TEXTURE_GEN_R glTexGen GL_TEXTURE_GEN_S glTexGen GL_TEXTURE_GEN_T glTexGen GL_VERTEX_ARRAY glVertexPointer .TE
Specifies a symbolic constant indicating a GL capability.
GL_INVALID_ENUM is generated if cap is not an accepted value.
GL_INVALID_OPERATION is generated if glIsEnabled is executed between the execution of glBegin and the corresponding execution of glEnd .
int GL.glIsList(int list)
glIsList returns GL_TRUE if list is the name of a display list and returns GL_FALSE otherwise.
Specifies a potential display-list name.
GL_INVALID_OPERATION is generated if glIsList is executed between the execution of glBegin and the corresponding execution of glEnd .
int GL.glIsTexture(int texture)
glIsTexture returns GL_TRUE if texture is currently the name of a texture. If texture is zero, or is a non-zero value that is not currently the name of a texture, or if an error occurs, glIsTexture returns GL_FALSE .
Specifies a value that may be the name of a texture.
GL_INVALID_OPERATION is generated if glIsTexture is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glLight(int light, int pname, float|int|array(float|int) param)
glLight sets the values of individual light source parameters. light names the light and is a symbolic name of the form GL_LIGHT i, where 0 \(<= i < GL_MAX_LIGHTS . pname specifies one of ten light source parameters, again by symbolic name. params is either a single value or a pointer to an array that contains the new values.
To enable and disable lighting calculation, call glEnable and glDisable with argument GL_LIGHTING . Lighting is initially disabled. When it is enabled, light sources that are enabled contribute to the lighting calculation. Light source i is enabled and disabled using glEnable and glDisable with argument GL_LIGHT i.
The ten light parameters are as follows:
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Specifies a light. The number of lights depends on the implementation, but at least eight lights are supported. They are identified by symbolic names of the form GL_LIGHT i where 0 \(<= i < GL_MAX_LIGHTS .
Specifies a single-valued light source parameter for light. GL_SPOT_EXPONENT , GL_SPOT_CUTOFF , GL_CONSTANT_ATTENUATION , GL_LINEAR_ATTENUATION , and GL_QUADRATIC_ATTENUATION are accepted.
Specifies the value that parameter pname of light source light will be set to.
Specifies a light. The number of lights depends on the implementation, but at least eight lights are supported. They are identified by symbolic names of the form GL_LIGHT i where 0 \(<= i < GL_MAX_LIGHTS .
Specifies a light source parameter for light. GL_AMBIENT , GL_DIFFUSE , GL_SPECULAR , GL_POSITION , GL_SPOT_CUTOFF , GL_SPOT_DIRECTION , GL_SPOT_EXPONENT , GL_CONSTANT_ATTENUATION , GL_LINEAR_ATTENUATION , and GL_QUADRATIC_ATTENUATION are accepted.
Specifies a pointer to the value or values that parameter pname of light source light will be set to.
GL_INVALID_ENUM is generated if either light or pname is not an accepted value.
GL_INVALID_VALUE is generated if a spot exponent value is specified outside the range [0,128], or if spot cutoff is specified outside the range [0,90] (except for the special value 180), or if a negative attenuation factor is specified.
GL_INVALID_OPERATION is generated if glLight is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glLightModel(int pname, float|int|array(float|int) param)
glLightModel sets the lighting model parameter. pname names a parameter and params gives the new value. There are three lighting model parameters:
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In RGBA mode, the lighted color of a vertex is the sum of the material emission intensity, the product of the material ambient reflectance and the lighting model full-scene ambient intensity, and the contribution of each enabled light source. Each light source contributes the sum of three terms: ambient, diffuse, and specular. The ambient light source contribution is the product of the material ambient reflectance and the light's ambient intensity. The diffuse light source contribution is the product of the material diffuse reflectance, the light's diffuse intensity, and the dot product of the vertex's normal with the normalized vector from the vertex to the light source. The specular light source contribution is the product of the material specular reflectance, the light's specular intensity, and the dot product of the normalized vertex-to-eye and vertex-to-light vectors, raised to the power of the shininess of the material. All three light source contributions are attenuated equally based on the distance from the vertex to the light source and on light source direction, spread exponent, and spread cutoff angle. All dot products are replaced with 0 if they evaluate to a negative value.
The alpha component of the resulting lighted color is set to the alpha value of the material diffuse reflectance.
In color index mode, the value of the lighted index of a vertex ranges from the ambient to the specular values passed to glMaterial using GL_COLOR_INDEXES . Diffuse and specular coefficients, computed with a (.30, .59, .11) weighting of the lights' colors, the shininess of the material, and the same reflection and attenuation equations as in the RGBA case, determine how much above ambient the resulting index is.
Specifies a single-valued lighting model parameter. GL_LIGHT_MODEL_LOCAL_VIEWER and GL_LIGHT_MODEL_TWO_SIDE are accepted.
Specifies the value that param will be set to.
Specifies a lighting model parameter. GL_LIGHT_MODEL_AMBIENT , GL_LIGHT_MODEL_LOCAL_VIEWER , and GL_LIGHT_MODEL_TWO_SIDE are accepted.
Specifies a pointer to the value or values that params will be set to.
GL_INVALID_ENUM is generated if pname is not an accepted value.
GL_INVALID_OPERATION is generated if glLightModel is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glLineStipple(int factor, int pattern)
Line stippling masks out certain fragments produced by rasterization; those fragments will not be drawn. The masking is achieved by using three parameters: the 16-bit line stipple pattern pattern, the repeat count factor, and an integer stipple counter s.
Counter s is reset to 0 whenever glBegin is called, and before each line segment of a glBegin (GL_LINES )/glEnd sequence is generated. It is incremented after each fragment of a unit width aliased line segment is generated, or after each i fragments of an i width line segment are generated. The i fragments associated with count s are masked out if .sp .ce pattern bit (s ~/~ "factor") ~roman mod~ 16 .sp is 0, otherwise these fragments are sent to the frame buffer. Bit zero of pattern is the least significant bit.
Antialiased lines are treated as a sequence of 1 times width rectangles for purposes of stippling. Whether rectagle s is rasterized or not depends on the fragment rule described for aliased lines, counting rectangles rather than groups of fragments.
To enable and disable line stippling, call glEnable and glDisable with argument GL_LINE_STIPPLE . When enabled, the line stipple pattern is applied as described above. When disabled, it is as if the pattern were all 1's. Initially, line stippling is disabled.
Specifies a multiplier for each bit in the line stipple pattern. If factor is 3, for example, each bit in the pattern is used three times before the next bit in the pattern is used. factor is clamped to the range [1, 256] and defaults to 1.
Specifies a 16-bit integer whose bit pattern determines which fragments of a line will be drawn when the line is rasterized. Bit zero is used first; the default pattern is all 1's.
GL_INVALID_OPERATION is generated if glLineStipple is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glLineWidth(float width)
glLineWidth specifies the rasterized width of both aliased and antialiased lines. Using a line width other than 1 has different effects, depending on whether line antialiasing is enabled. To enable and disable line antialiasing, call glEnable and glDisable with argument GL_LINE_SMOOTH . Line antialiasing is initially disabled.
If line antialiasing is disabled, the actual width is determined by rounding the supplied width to the nearest integer. (If the rounding results in the value 0, it is as if the line width were 1.) If .nf | DELTA x | >= | DELTA y |, .fi i pixels are filled in each column that is rasterized, where i is the rounded value of width. Otherwise, i pixels are filled in each row that is rasterized.
If antialiasing is enabled, line rasterization produces a fragment for each pixel square that intersects the region lying within the rectangle having width equal to the current line width, length equal to the actual length of the line, and centered on the mathematical line segment. The coverage value for each fragment is the window coordinate area of the intersection of the rectangular region with the corresponding pixel square. This value is saved and used in the final rasterization step.
Not all widths can be supported when line antialiasing is enabled. If an unsupported width is requested, the nearest supported width is used. Only width 1 is guaranteed to be supported; others depend on the implementation. To query the range of supported widths and the size difference between supported widths within the range, call glGet with arguments GL_LINE_WIDTH_RANGE and GL_LINE_WIDTH_GRANULARITY .
Specifies the width of rasterized lines. The initial value is 1.
GL_INVALID_VALUE is generated if width is less than or equal to 0.
GL_INVALID_OPERATION is generated if glLineWidth is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glListBase(int base)
glCallLists specifies an array of offsets. Display-list names are generated by adding base to each offset. Names that reference valid display lists are executed; the others are ignored.
Specifies an integer offset that will be added to glCallLists offsets to generate display-list names. The initial value is 0.
GL_INVALID_OPERATION is generated if glListBase is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glLoadMatrix(array(array(float|int)) m)
glLoadMatrix replaces the current matrix with the one whose elements are specified by m. The current matrix is the projection matrix, modelview matrix, or texture matrix, depending on the current matrix mode (see glMatrixMode ).
The current matrix, M, defines a transformation of coordinates. For instance, assume M refers to the modelview matrix. If v ~=~ (v[0], v[1], v[2], v[3]) is the set of object coordinates of a vertex, and m points to an array of 16 single- or double-precision floating-point values m[0], m[1],. . .,m[15], then the modelview transformation M(v) does the following:
.ce .EQ down 130 {M(v) ~ = ~ {{ left ( matrix { ccol { ~m[0] above m[1] above m[2] above m[3] ~} ccol { ~m[4] above m[5] above m[6] above m[7] ~} ccol { ~m[8] above m[9] above m[10] above m[11] ~} ccol { ~m[12]~ above m[13]~ above m[14]~ above m[15]~} } right ) } ~~ times ~~ {left ( matrix { ccol { ~v[0]~ above ~v[1]~ above ~v[2]~ above ~v[3]~ } } right )} }} .EN
.sp
Where 'times' denotes matrix multiplication.
Projection and texture transformations are similarly defined.
Specifies a pointer to 16 consecutive values, which are used as the elements of a 4 times 4 column-major matrix.
GL_INVALID_OPERATION is generated if glLoadMatrix is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glLoadName(int name)
The name stack is used during selection mode to allow sets of rendering commands to be uniquely identified. It consists of an ordered set of unsigned integers. glLoadName causes name to replace the value on the top of the name stack, which is initially empty.
The name stack is always empty while the render mode is not GL_SELECT . Calls to glLoadName while the render mode is not GL_SELECT are ignored.
Specifies a name that will replace the top value on the name stack.
GL_INVALID_OPERATION is generated if glLoadName is called while the name stack is empty.
GL_INVALID_OPERATION is generated if glLoadName is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glMaterial(int face, int pname, float|int|array(float|int) param)
glMaterial assigns values to material parameters. There are two matched sets of material parameters. One, the front-facing set, is used to shade points, lines, bitmaps, and all polygons (when two-sided lighting is disabled), or just front-facing polygons (when two-sided lighting is enabled). The other set, back-facing, is used to shade back-facing polygons only when two-sided lighting is enabled. Refer to the glLightModel reference page for details concerning one- and two-sided lighting calculations.
glMaterial takes three arguments. The first, face, specifies whether the GL_FRONT materials, the GL_BACK materials, or both GL_FRONT_AND_BACK materials will be modified. The second, pname, specifies which of several parameters in one or both sets will be modified. The third, params, specifies what value or values will be assigned to the specified parameter.
Material parameters are used in the lighting equation that is optionally applied to each vertex. The equation is discussed in the glLightModel reference page. The parameters that can be specified using glMaterial , and their interpretations by the lighting equation, are as follows:
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Specifies which face or faces are being updated. Must be one of GL_FRONT , GL_BACK , or GL_FRONT_AND_BACK .
Specifies the single-valued material parameter of the face or faces that is being updated. Must be GL_SHININESS .
Specifies the value that parameter GL_SHININESS will be set to.
Specifies which face or faces are being updated. Must be one of GL_FRONT , GL_BACK , or GL_FRONT_AND_BACK .
Specifies the material parameter of the face or faces that is being updated. Must be one of GL_AMBIENT , GL_DIFFUSE , GL_SPECULAR , GL_EMISSION , GL_SHININESS , GL_AMBIENT_AND_DIFFUSE , or GL_COLOR_INDEXES .
Specifies a pointer to the value or values that pname will be set to.
GL_INVALID_ENUM is generated if either face or pname is not an accepted value.
GL_INVALID_VALUE is generated if a specular exponent outside the range [0,128] is specified.
void GL.glMultMatrix(array(array(float|int)) m)
glMultMatrix multiplies the current matrix with the one specified using m, and replaces the current matrix with the product.
The current matrix is determined by the current matrix mode (see glMatrixMode ). It is either the projection matrix, modelview matrix, or the texture matrix.
Points to 16 consecutive values that are used as the elements of a 4 times 4 column-major matrix.
GL_INVALID_OPERATION is generated if glMultMatrix is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glNewList(int list, int mode)
Display lists are groups of GL commands that have been stored for subsequent execution. Display lists are created with glNewList . All subsequent commands are placed in the display list, in the order issued, until glEndList is called.
glNewList has two arguments. The first argument, list, is a positive integer that becomes the unique name for the display list. Names can be created and reserved with glGenLists and tested for uniqueness with glIsList . The second argument, mode, is a symbolic constant that can assume one of two values:
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Certain commands are not compiled into the display list but are executed immediately, regardless of the display-list mode. These commands are glColorPointer , glDeleteLists , glDisableClientState , glEdgeFlagPointer , glEnableClientState , glFeedbackBuffer , glFinish , glFlush , glGenLists , glIndexPointer , glInterleavedArrays , glIsEnabled , glIsList , glNormalPointer , glPopClientAttrib , glPixelStore , glPushClientAttrib , glReadPixels , glRenderMode , glSelectBuffer , glTexCoordPointer , glVertexPointer , and all of the glGet commands.
Similarly, glTexImage2D and glTexImage1D are executed immediately and not compiled into the display list when their first argument is GL_PROXY_TEXTURE_2D or GL_PROXY_TEXTURE_1D , respectively.
When glEndList is encountered, the display-list definition is completed by associating the list with the unique name list (specified in the glNewList command). If a display list with name list already exists, it is replaced only when glEndList is called.
Specifies the display-list name.
Specifies the compilation mode, which can be GL_COMPILE or GL_COMPILE_AND_EXECUTE .
GL_INVALID_VALUE is generated if list is 0.
GL_INVALID_ENUM is generated if mode is not an accepted value.
GL_INVALID_OPERATION is generated if glEndList is called without a preceding glNewList , or if glNewList is called while a display list is being defined.
GL_INVALID_OPERATION is generated if glNewList or glEndList is executed between the execution of glBegin and the corresponding execution of glEnd .
GL_OUT_OF_MEMORY is generated if there is insufficient memory to compile the display list. If the GL version is 1.1 or greater, no change is made to the previous contents of the display list, if any, and no other change is made to the GL state. (It is as if no attempt had been made to create the new display list.)
void GL.glNormal(float|int|array(float|int) nx, float|int|void ny, float|int|void nz)
The current normal is set to the given coordinates whenever glNormal is issued. Byte, short, or integer arguments are converted to floating-point format with a linear mapping that maps the most positive representable integer value to 1.0, and the most negative representable integer value to -1.0.
Normals specified with glNormal need not have unit length. If normalization is enabled, then normals specified with glNormal are normalized after transformation. To enable and disable normalization, call glEnable and glDisable with the argument GL_NORMALIZE . Normalization is initially disabled.
Specify the x, y, and z coordinates of the new current normal. The initial value of the current normal is the unit vector, (0, 0, 1).
Specifies a pointer to an array of three elements: the x, y, and z coordinates of the new current normal.
void GL.glOrtho(float left, float right, float bottom, float top, float zNear, float zFar)
glOrtho describes a transformation that produces a parallel projection. The current matrix (see glMatrixMode ) is multiplied by this matrix and the result replaces the current matrix, as if glMultMatrix were called with the following matrix as its argument: .sp .ce .EQ left ( matrix { ccol { {2 over {"right" - "left"}} above 0 above 0 above 0 } ccol { 0 above {2 over {"top" - "bottom"}} above 0 above 0 } ccol { 0 above 0 above {-2 over {"zFar" - "zNear"}} above 0 } ccol { {t sub x}~ above {t sub y}~ above {t sub z}~ above 1~ } } right ) .EN
where .ce .EQ t sub x ~=~ -{{"right" + "left"} over {"right" - "left"}} .EN
.ce .EQ t sub y ~=~ -{{"top" + "bottom"} over {"top" - "bottom"}} .EN
.ce .EQ t sub z ~=~ -{{"zFar" + "zNear"} over {"zFar" - "zNear"}} .EN
.RE
Typically, the matrix mode is GL_PROJECTION , and (left, bottom, -zNear) and (right, top, -zNear) specify the points on the near clipping plane that are mapped to the lower left and upper right corners of the window, respectively, assuming that the eye is located at (0, 0, 0). -zFar specifies the location of the far clipping plane. Both zNear and zFar can be either positive or negative.
Use glPushMatrix and glPopMatrix to save and restore the current matrix stack.
Specify the coordinates for the left and right vertical clipping planes.
Specify the coordinates for the bottom and top horizontal clipping planes.
Specify the distances to the nearer and farther depth clipping planes. These values are negative if the plane is to be behind the viewer.
GL_INVALID_OPERATION is generated if glOrtho is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glPassThrough(float token)
Feedback is a GL render mode. The mode is selected by calling glRenderMode with GL_FEEDBACK . When the GL is in feedback mode, no pixels are produced by rasterization. Instead, information about primitives that would have been rasterized is fed back to the application using the GL. See the glFeedbackBuffer reference page for a description of the feedback buffer and the values in it.
glPassThrough inserts a user-defined marker in the feedback buffer when it is executed in feedback mode. token is returned as if it were a primitive; it is indicated with its own unique identifying value: GL_PASS_THROUGH_TOKEN . The order of glPassThrough commands with respect to the specification of graphics primitives is maintained.
Specifies a marker value to be placed in the feedback buffer following a GL_PASS_THROUGH_TOKEN .
GL_INVALID_OPERATION is generated if glPassThrough is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glPixelZoom(float xfactor, float yfactor)
glPixelZoom specifies values for the x and y zoom factors. During the execution of glDrawPixels or glCopyPixels , if (xr , yr ) is the current raster position, and a given element is in the mth row and nth column of the pixel rectangle, then pixels whose centers are in the rectangle with corners at .sp .ce (xr ~+~ n cdot "xfactor", yr ~+~ m cdot "yfactor") .sp .ce (xr ~+~ (n+1) cdot "xfactor", yr ~+~ (m+1) cdot "yfactor") .sp are candidates for replacement. Any pixel whose center lies on the bottom or left edge of this rectangular region is also modified.
Pixel zoom factors are not limited to positive values. Negative zoom factors reflect the resulting image about the current raster position.
Specify the x and y zoom factors for pixel write operations.
GL_INVALID_OPERATION is generated if glPixelZoom is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glPointSize(float size)
glPointSize specifies the rasterized diameter of both aliased and antialiased points. Using a point size other than 1 has different effects, depending on whether point antialiasing is enabled. To enable and disable point antialiasing, call glEnable and glDisable with argument GL_POINT_SMOOTH . Point antialiasing is initially disabled.
If point antialiasing is disabled, the actual size is determined by rounding the supplied size to the nearest integer. (If the rounding results in the value 0, it is as if the point size were 1.) If the rounded size is odd, then the center point ( x , y ) of the pixel fragment that represents the point is computed as .sp .ce ( \(lf ~ x sub w ~ \(rf ~+~ .5 , \(lf ~ y sub w ~ \(rf ~+~ .5 ) .sp where w subscripts indicate window coordinates. All pixels that lie within the square grid of the rounded size centered at ( x , y ) make up the fragment. If the size is even, the center point is .sp .ce ( \(lf ~ x sub w ~+~ .5 ~ \(rf, \(lf ~ y sub w ~+~ .5 ~ \(rf ) .sp and the rasterized fragment's centers are the half-integer window coordinates within the square of the rounded size centered at ( x , y ). All pixel fragments produced in rasterizing a nonantialiased point are assigned the same associated data, that of the vertex corresponding to the point.
If antialiasing is enabled, then point rasterization produces a fragment for each pixel square that intersects the region lying within the circle having diameter equal to the current point size and centered at the point's ( x sub w , y sub w ). The coverage value for each fragment is the window coordinate area of the intersection of the circular region with the corresponding pixel square. This value is saved and used in the final rasterization step. The data associated with each fragment is the data associated with the point being rasterized.
Not all sizes are supported when point antialiasing is enabled. If an unsupported size is requested, the nearest supported size is used. Only size 1 is guaranteed to be supported; others depend on the implementation. To query the range of supported sizes and the size difference between supported sizes within the range, call glGet with arguments GL_POINT_SIZE_RANGE and GL_POINT_SIZE_GRANULARITY .
Specifies the diameter of rasterized points. The initial value is 1.
GL_INVALID_VALUE is generated if size is less than or equal to 0.
GL_INVALID_OPERATION is generated if glPointSize is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glPolygonMode(int face, int mode)
glPolygonMode controls the interpretation of polygons for rasterization. face describes which polygons mode applies to: front-facing polygons (GL_FRONT ), back-facing polygons (GL_BACK ), or both (GL_FRONT_AND_BACK ). The polygon mode affects only the final rasterization of polygons. In particular, a polygon's vertices are lit and the polygon is clipped and possibly culled before these modes are applied.
Three modes are defined and can be specified in mode:
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Specifies the polygons that mode applies to. Must be GL_FRONT for front-facing polygons, GL_BACK for back-facing polygons, or GL_FRONT_AND_BACK for front- and back-facing polygons.
Specifies how polygons will be rasterized. Accepted values are GL_POINT , GL_LINE , and GL_FILL . The initial value is GL_FILL for both front- and back-facing polygons.
GL_INVALID_ENUM is generated if either face or mode is not an accepted value.
GL_INVALID_OPERATION is generated if glPolygonMode is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glPolygonOffset(float factor, float units)
When GL_POLYGON_OFFSET is enabled, each fragment's depth value will be offset after it is interpolated from the depth values of the appropriate vertices. The value of the offset is "factor" ~*~ DZ ~~+~~ r ~*~ "units", where DZ~ is a measurement of the change in depth relative to the screen area of the polygon, and r is the smallest value that is guaranteed to produce a resolvable offset for a given implementation. The offset is added before the depth test is performed and before the value is written into the depth buffer.
glPolygonOffset is useful for rendering hidden-line images, for applying decals to surfaces, and for rendering solids with highlighted edges.
Specifies a scale factor that is used to create a variable depth offset for each polygon. The initial value is 0.
Is multiplied by an implementation-specific value to create a constant depth offset. The initial value is 0.
GL_INVALID_OPERATION is generated if glPolygonOffset is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glPushAttrib(int mask)
glPushAttrib takes one argument, a mask that indicates which groups of state variables to save on the attribute stack. Symbolic constants are used to set bits in the mask. mask is typically constructed by ORing several of these constants together. The special mask GL_ALL_ATTRIB_BITS can be used to save all stackable states.
The symbolic mask constants and their associated GL state are as follows (the second column lists which attributes are saved):
.TS ; l l . GL_ACCUM_BUFFER_BIT Accumulation buffer clear value
GL_COLOR_BUFFER_BIT GL_ALPHA_TEST enable bit Alpha test function and reference value GL_BLEND enable bit Blending source and destination functions Constant blend color Blending equation GL_DITHER enable bit GL_DRAW_BUFFER setting GL_COLOR_LOGIC_OP enable bit GL_INDEX_LOGIC_OP enable bit Logic op function Color mode and index mode clear values Color mode and index mode writemasks
GL_CURRENT_BIT Current RGBA color Current color index Current normal vector Current texture coordinates Current raster position GL_CURRENT_RASTER_POSITION_VALID flag RGBA color associated with current raster position Color index associated with current raster position Texture coordinates associated with current raster position GL_EDGE_FLAG flag
GL_DEPTH_BUFFER_BIT GL_DEPTH_TEST enable bit Depth buffer test function Depth buffer clear value GL_DEPTH_WRITEMASK enable bit
GL_ENABLE_BIT GL_ALPHA_TEST flag GL_AUTO_NORMAL flag GL_BLEND flag Enable bits for the user-definable clipping planes GL_COLOR_MATERIAL GL_CULL_FACE flag GL_DEPTH_TEST flag GL_DITHER flag GL_FOG flag GL_LIGHT i where 0\ <= i<GL_MAX_LIGHTS GL_LIGHTING flag GL_LINE_SMOOTH flag GL_LINE_STIPPLE flag GL_COLOR_LOGIC_OP flag GL_INDEX_LOGIC_OP flag GL_MAP1_ x where x is a map type GL_MAP2_ x where x is a map type GL_NORMALIZE flag GL_POINT_SMOOTH flag GL_POLYGON_OFFSET_LINE flag GL_POLYGON_OFFSET_FILL flag GL_POLYGON_OFFSET_POINT flag GL_POLYGON_SMOOTH flag GL_POLYGON_STIPPLE flag GL_SCISSOR_TEST flag GL_STENCIL_TEST flag GL_TEXTURE_1D flag GL_TEXTURE_2D flag Flags GL_TEXTURE_GEN_ x where x is S, T, R, or Q
GL_EVAL_BIT GL_MAP1_ x enable bits, where x is a map type GL_MAP2_ x enable bits, where x is a map type 1D grid endpoints and divisions 2D grid endpoints and divisions GL_AUTO_NORMAL enable bit
GL_FOG_BIT GL_FOG enable bit Fog color Fog density Linear fog start Linear fog end Fog index GL_FOG_MODE value
GL_HINT_BIT GL_PERSPECTIVE_CORRECTION_HINT setting GL_POINT_SMOOTH_HINT setting GL_LINE_SMOOTH_HINT setting GL_POLYGON_SMOOTH_HINT setting GL_FOG_HINT setting
GL_LIGHTING_BIT GL_COLOR_MATERIAL enable bit GL_COLOR_MATERIAL_FACE value Color material parameters that are tracking the current color Ambient scene color GL_LIGHT_MODEL_LOCAL_VIEWER value GL_LIGHT_MODEL_TWO_SIDE setting GL_LIGHTING enable bit Enable bit for each light Ambient, diffuse, and specular intensity for each light Direction, position, exponent, and cutoff angle for each light Constant, linear, and quadratic attenuation factors for each light Ambient, diffuse, specular, and emissive color for each material Ambient, diffuse, and specular color indices for each material Specular exponent for each material GL_SHADE_MODEL setting
GL_LINE_BIT GL_LINE_SMOOTH flag GL_LINE_STIPPLE enable bit Line stipple pattern and repeat counter Line width
GL_LIST_BIT GL_LIST_BASE setting
GL_PIXEL_MODE_BIT GL_RED_BIAS and GL_RED_SCALE settings GL_GREEN_BIAS and GL_GREEN_SCALE values GL_BLUE_BIAS and GL_BLUE_SCALE GL_ALPHA_BIAS and GL_ALPHA_SCALE GL_DEPTH_BIAS and GL_DEPTH_SCALE GL_INDEX_OFFSET and GL_INDEX_SHIFT values GL_MAP_COLOR and GL_MAP_STENCIL flags GL_ZOOM_X and GL_ZOOM_Y factors GL_READ_BUFFER setting
GL_POINT_BIT GL_POINT_SMOOTH flag Point size
GL_POLYGON_BIT GL_CULL_FACE enable bit GL_CULL_FACE_MODE value GL_FRONT_FACE indicator GL_POLYGON_MODE setting GL_POLYGON_SMOOTH flag GL_POLYGON_STIPPLE enable bit GL_POLYGON_OFFSET_FILL flag GL_POLYGON_OFFSET_LINE flag GL_POLYGON_OFFSET_POINT flag GL_POLYGON_OFFSET_FACTOR GL_POLYGON_OFFSET_UNITS
GL_POLYGON_STIPPLE_BIT Polygon stipple image
GL_SCISSOR_BIT GL_SCISSOR_TEST flag Scissor box
GL_STENCIL_BUFFER_BIT GL_STENCIL_TEST enable bit Stencil function and reference value Stencil value mask Stencil fail, pass, and depth buffer pass actions Stencil buffer clear value Stencil buffer writemask
GL_TEXTURE_BIT Enable bits for the four texture coordinates Border color for each texture image Minification function for each texture image Magnification function for each texture image Texture coordinates and wrap mode for each texture image Color and mode for each texture environment Enable bits GL_TEXTURE_GEN_ x, x is S, T, R, and Q GL_TEXTURE_GEN_MODE setting for S, T, R, and Q glTexGen plane equations for S, T, R, and Q Current texture bindings (for example, GL_TEXTURE_2D_BINDING )
GL_TRANSFORM_BIT Coefficients of the six clipping planes Enable bits for the user-definable clipping planes GL_MATRIX_MODE value GL_NORMALIZE flag
GL_VIEWPORT_BIT Depth range (near and far) Viewport origin and extent .TE
glPopAttrib restores the values of the state variables saved with the last
glPushAttrib command. Those not saved are left unchanged.
It is an error to push attributes onto a full stack, or to pop attributes off an empty stack. In either case, the error flag is set and no other change is made to GL state.
Initially, the attribute stack is empty.
Specifies a mask that indicates which attributes to save. Values for mask are listed below.
GL_STACK_OVERFLOW is generated if glPushAttrib is called while the attribute stack is full.
GL_STACK_UNDERFLOW is generated if glPopAttrib is called while the attribute stack is empty.
GL_INVALID_OPERATION is generated if glPushAttrib or glPopAttrib is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glPushClientAttrib(int mask)
glPushClientAttrib takes one argument, a mask that indicates which groups of client-state variables to save on the client attribute stack. Symbolic constants are used to set bits in the mask. mask is typically constructed by OR'ing several of these constants together. The special mask GL_CLIENT_ALL_ATTRIB_BITS can be used to save all stackable client state.
The symbolic mask constants and their associated GL client state are as follows (the second column lists which attributes are saved):
GL_CLIENT_PIXEL_STORE_BIT Pixel storage modes
GL_CLIENT_VERTEX_ARRAY_BIT Vertex arrays (and enables)
glPopClientAttrib restores the values of the client-state variables saved with the last glPushClientAttrib . Those not saved are left unchanged.
It is an error to push attributes onto a full client attribute stack, or to pop attributes off an empty stack. In either case, the error flag is set, and no other change is made to GL state.
Initially, the client attribute stack is empty.
Specifies a mask that indicates which attributes to save. Values for mask are listed below.
GL_STACK_OVERFLOW is generated if glPushClientAttrib is called while the attribute stack is full.
GL_STACK_UNDERFLOW is generated if glPopClientAttrib is called while the attribute stack is empty.
void GL.glPushName(int name)
The name stack is used during selection mode to allow sets of rendering commands to be uniquely identified. It consists of an ordered set of unsigned integers and is initially empty.
glPushName causes name to be pushed onto the name stack. glPopName pops one name off the top of the stack.
The maximum name stack depth is implementation-dependent; call GL_MAX_NAME_STACK_DEPTH to find out the value for a particular implementation. It is an error to push a name onto a full stack, or to pop a name off an empty stack. It is also an error to manipulate the name stack between the execution of glBegin and the corresponding execution of glEnd . In any of these cases, the error flag is set and no other change is made to GL state.
The name stack is always empty while the render mode is not GL_SELECT . Calls to glPushName or glPopName while the render mode is not GL_SELECT are ignored.
Specifies a name that will be pushed onto the name stack.
GL_STACK_OVERFLOW is generated if glPushName is called while the name stack is full.
GL_STACK_UNDERFLOW is generated if glPopName is called while the name stack is empty.
GL_INVALID_OPERATION is generated if glPushName or glPopName is executed between a call to glBegin and the corresponding call to glEnd .
void GL.glRasterPos(float|int x, float|int y, float|int|void z, float|int|void w)
void GL.glRasterPos(array(float|int) pos)
The GL maintains a 3D position in window coordinates. This position, called the raster position, is used to position pixel and bitmap write operations. It is maintained with subpixel accuracy. See glBitmap , glDrawPixels , and glCopyPixels .
The current raster position consists of three window coordinates (x, y, z), a clip coordinate value (w), an eye coordinate distance, a valid bit, and associated color data and texture coordinates. The w coordinate is a clip coordinate, because w is not projected to window coordinates. The variable z defaults to 0 and w defaults to 1.
The object coordinates presented by glRasterPos are treated just like those of a glVertex command: They are transformed by the current modelview and projection matrices and passed to the clipping stage. If the vertex is not culled, then it is projected and scaled to window coordinates, which become the new current raster position, and the GL_CURRENT_RASTER_POSITION_VALID flag is set. If the vertex .I is culled, then the valid bit is cleared and the current raster position and associated color and texture coordinates are undefined.
The current raster position also includes some associated color data and texture coordinates. If lighting is enabled, then GL_CURRENT_RASTER_COLOR (in RGBA mode) or GL_CURRENT_RASTER_INDEX (in color index mode) is set to the color produced by the lighting calculation (see glLight , glLightModel , and
glShadeModel ). If lighting is disabled, current color (in RGBA mode, state variable GL_CURRENT_COLOR ) or color index (in color index mode, state variable GL_CURRENT_INDEX ) is used to update the current raster color.
Likewise, GL_CURRENT_RASTER_TEXTURE_COORDS is updated as a function of GL_CURRENT_TEXTURE_COORDS , based on the texture matrix and the texture generation functions (see glTexGen ). Finally, the distance from the origin of the eye coordinate system to the vertex as transformed by only the modelview matrix replaces GL_CURRENT_RASTER_DISTANCE .
Initially, the current raster position is (0, 0, 0, 1), the current raster distance is 0, the valid bit is set, the associated RGBA color is (1, 1, 1, 1), the associated color index is 1, and the associated texture coordinates are (0, 0, 0, 1). In RGBA mode, GL_CURRENT_RASTER_INDEX is always 1; in color index mode, the current raster RGBA color always maintains its initial value.
Specify the x, y, z, and w object coordinates (if present) for the raster position.
Specifies a pointer to an array of two, three, or four elements, specifying x, y, z, and w coordinates, respectively.
GL_INVALID_OPERATION is generated if glRasterPos is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glRotate(float|int|array(float|int) angle, float|int|void x, float|int|void y, float|int|void z)
glRotate produces a rotation of angle degrees around the vector ("x", "y", "z"). The current matrix (see glMatrixMode ) is multiplied by a rotation matrix with the product replacing the current matrix, as if glMultMatrix were called with the following matrix as its argument:
.ce .EQ left ( ~ down 20 matrix { ccol { "x" "x" (1 - c)+ c above "y" "x" (1 - c)+ "z" s above "x" "z" (1 - c)-"y" s above ~0 } ccol {"x" "y" (1 - c)-"z" s above "y" "y" (1 - c)+ c above "y" "z" (1 - c)+ "x" s above ~0 } ccol { "x" "z" (1 - c)+ "y" s above "y" "z" (1 - c)- "x" s above "z" "z" (1 - c) + c above ~0 } ccol { ~0 above ~0 above ~0 above ~1} } ~~ right ) .EN
.sp Where c ~=~ cos("angle"), s ~=~ sine("angle"), and ||(~"x", "y", "z"~)|| ~=~ 1 (if not, the GL will normalize this vector). .sp .sp
If the matrix mode is either GL_MODELVIEW or GL_PROJECTION , all objects drawn after glRotate is called are rotated. Use glPushMatrix and glPopMatrix to save and restore the unrotated coordinate system.
Specifies the angle of rotation, in degrees.
Specify the x, y, and z coordinates of a vector, respectively.
GL_INVALID_OPERATION is generated if glRotate is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glScale(float|int|array(float|int) x, float|int|void y, float|int|void z)
glScale produces a nonuniform scaling along the x, y, and z axes. The three parameters indicate the desired scale factor along each of the three axes.
The current matrix (see glMatrixMode ) is multiplied by this scale matrix, and the product replaces the current matrix as if glScale were called with the following matrix as its argument:
.ce .EQ left ( ~ down 20 matrix { ccol { ~"x" above ~0 above ~0 above ~0 } ccol { ~0 above ~"y" above ~0 above ~0 } ccol { ~0 above ~0 above ~"z" above ~0 } ccol { ~0 above ~0 above ~0 above ~1} } ~~ right ) .EN .sp If the matrix mode is either GL_MODELVIEW or GL_PROJECTION , all objects drawn after glScale is called are scaled.
Use glPushMatrix and glPopMatrix to save and restore the unscaled coordinate system.
Specify scale factors along the x, y, and z axes, respectively.
GL_INVALID_OPERATION is generated if glScale is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glScissor(int x, int y, int width, int height)
glScissor defines a rectangle, called the scissor box, in window coordinates. The first two arguments, x and y, specify the lower left corner of the box. width and height specify the width and height of the box.
To enable and disable the scissor test, call glEnable and glDisable with argument GL_SCISSOR_TEST . The test is initially disabled. While the test is enabled, only pixels that lie within the scissor box can be modified by drawing commands. Window coordinates have integer values at the shared corners of frame buffer pixels. \f7glScissor(0,0,1,1)\fP allows modification of only the lower left pixel in the window, and \f7glScissor(0,0,0,0)\fP doesn't allow modification of any pixels in the window.
When the scissor test is disabled, it is as though the scissor box includes the entire window.
Specify the lower left corner of the scissor box. Initially (0, 0).
Specify the width and height of the scissor box. When a GL context is first attached to a window, width and height are set to the dimensions of that window.
GL_INVALID_VALUE is generated if either width or height is negative.
GL_INVALID_OPERATION is generated if glScissor is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glStencilFunc(int func, int ref, int mask)
Stenciling, like depth-buffering, enables and disables drawing on a per-pixel basis. You draw into the stencil planes using GL drawing primitives, then render geometry and images, using the stencil planes to mask out portions of the screen. Stenciling is typically used in multipass rendering algorithms to achieve special effects, such as decals, outlining, and constructive solid geometry rendering.
The stencil test conditionally eliminates a pixel based on the outcome of a comparison between the reference value and the value in the stencil buffer. To enable and disable the test, call glEnable and glDisable with argument GL_STENCIL_TEST . To specify actions based on the outcome of the stencil test, call glStencilOp .
func is a symbolic constant that determines the stencil comparison function. It accepts one of eight values, shown in the following list. ref is an integer reference value that is used in the stencil comparison. It is clamped to the range [0,2 sup n - 1], where n is the number of bitplanes in the stencil buffer. mask is bitwise ANDed with both the reference value and the stored stencil value, with the ANDed values participating in the comparison. .P If stencil represents the value stored in the corresponding stencil buffer location, the following list shows the effect of each comparison function that can be specified by func. Only if the comparison succeeds is the pixel passed through to the next stage in the rasterization process (see glStencilOp ). All tests treat stencil values as unsigned integers in the range [0,2 sup n - 1], where n is the number of bitplanes in the stencil buffer.
The following values are accepted by func:
|
Specifies the test function. Eight tokens are valid: GL_NEVER , GL_LESS , GL_LEQUAL , GL_GREATER , GL_GEQUAL , GL_EQUAL , GL_NOTEQUAL , and GL_ALWAYS . The initial value is GL_ALWAYS .
Specifies the reference value for the stencil test. ref is clamped to the range [0,2 sup n - 1], where n is the number of bitplanes in the stencil buffer. The initial value is 0.
Specifies a mask that is ANDed with both the reference value and the stored stencil value when the test is done. The initial value is all 1's.
GL_INVALID_ENUM is generated if func is not one of the eight accepted values.
GL_INVALID_OPERATION is generated if glStencilFunc is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glStencilMask(int mask)
glStencilMask controls the writing of individual bits in the stencil planes. The least significant n bits of mask, where n is the number of bits in the stencil buffer, specify a mask. Where a 1 appears in the mask, it's possible to write to the corresponding bit in the stencil buffer. Where a 0 appears, the corresponding bit is write-protected. Initially, all bits are enabled for writing.
Specifies a bit mask to enable and disable writing of individual bits in the stencil planes. Initially, the mask is all 1's.
GL_INVALID_OPERATION is generated if glStencilMask is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glStencilOp(int fail, int zfail, int zpass)
Stenciling, like depth-buffering, enables and disables drawing on a per-pixel basis. You draw into the stencil planes using GL drawing primitives, then render geometry and images, using the stencil planes to mask out portions of the screen. Stenciling is typically used in multipass rendering algorithms to achieve special effects, such as decals, outlining, and constructive solid geometry rendering.
The stencil test conditionally eliminates a pixel based on the outcome of a comparison between the value in the stencil buffer and a reference value. To enable and disable the test, call glEnable and glDisable with argument GL_STENCIL_TEST ; to control it, call glStencilFunc .
glStencilOp takes three arguments that indicate what happens to the stored stencil value while stenciling is enabled. If the stencil test fails, no change is made to the pixel's color or depth buffers, and fail specifies what happens to the stencil buffer contents. The following six actions are possible.
|
Stencil buffer values are treated as unsigned integers. When incremented and decremented, values are clamped to 0 and 2 sup n - 1, where n is the value returned by querying GL_STENCIL_BITS .
The other two arguments to glStencilOp specify stencil buffer actions that depend on whether subsequent depth buffer tests succeed (zpass) or fail (zfail) (see
glDepthFunc ). The actions are specified using the same six symbolic constants as fail. Note that zfail is ignored when there is no depth buffer, or when the depth buffer is not enabled. In these cases, fail and zpass specify stencil action when the stencil test fails and passes, respectively.
Specifies the action to take when the stencil test fails. Six symbolic constants are accepted: GL_KEEP , GL_ZERO , GL_REPLACE , GL_INCR , GL_DECR , and GL_INVERT . The initial value is GL_KEEP .
Specifies the stencil action when the stencil test passes, but the depth test fails. zfail accepts the same symbolic constants as fail. The initial value is GL_KEEP .
Specifies the stencil action when both the stencil test and the depth test pass, or when the stencil test passes and either there is no depth buffer or depth testing is not enabled. zpass accepts the same symbolic constants as fail. The initial value is GL_KEEP .
GL_INVALID_ENUM is generated if fail, zfail, or zpass is any value other than the six defined constant values.
GL_INVALID_OPERATION is generated if glStencilOp is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glTexCoord(float|int|array(float|int) s, float|int|void t, float|int|void r, float|int|void q)
glTexCoord specifies texture coordinates in one, two, three, or four dimensions. glTexCoord1 sets the current texture coordinates to (s, 0, 0, 1); a call to
glTexCoord2 sets them to (s, t, 0, 1). Similarly, glTexCoord3 specifies the texture coordinates as (s, t, r, 1), and glTexCoord4 defines all four components explicitly as (s, t, r, q).
The current texture coordinates are part of the data that is associated with each vertex and with the current raster position. Initially, the values for s, t, r, and q are (0, 0, 0, 1).
Specify s, t, r, and q texture coordinates. Not all parameters are present in all forms of the command.
Specifies a pointer to an array of one, two, three, or four elements, which in turn specify the s, t, r, and q texture coordinates.
void GL.glTexEnv(int target, int pname, float|int|array(float|int) param)
A texture environment specifies how texture values are interpreted when a fragment is textured. target must be GL_TEXTURE_ENV . pname can be either GL_TEXTURE_ENV_MODE or GL_TEXTURE_ENV_COLOR .
If pname is GL_TEXTURE_ENV_MODE , then params is (or points to) the symbolic name of a texture function. Four texture functions may be specified: GL_MODULATE , GL_DECAL , GL_BLEND , and GL_REPLACE .
A texture function acts on the fragment to be textured using the texture image value that applies to the fragment (see glTexParameter ) and produces an RGBA color for that fragment. The following table shows how the RGBA color is produced for each of the three texture functions that can be chosen. C is a triple of color values (RGB) and A is the associated alpha value. RGBA values extracted from a texture image are in the range [0,1]. The subscript f refers to the incoming fragment, the subscript t to the texture image, the subscript c to the texture environment color, and subscript v indicates a value produced by the texture function.
A texture image can have up to four components per texture element (see glTexImage1D , glTexImage2D , glCopyTexImage1D , and glCopyTexImage2D ). In a one-component image, L sub t indicates that single component. A two-component image uses L sub t and A sub t. A three-component image has only a color value, C sub t. A four-component image has both a color value C sub t and an alpha value A sub t.
.ne .TS center box tab(:) ; ci || ci s s s ci || c c c c c || c | c | c | c. Base internal:Texture functions format:GL_MODULATE :GL_DECAL :GL_BLEND :GL_REPLACE = GL_ALPHA :C sub v = C sub f:undefined:C sub v = C sub f:C sub v = C sub f \^ :A sub v = A sub f A sub t:\^:A sub v = A sub f:A sub v = A sub t _ GL_LUMINANCE :C sub v = L sub t C sub f:undefined:C sub v = ( 1 - L sub t ) C sub f:C sub v = L sub t 1: : :+ L sub t C sub c: : : : : : A sub v = A sub f:\^: A sub v = A sub f:A sub v = A sub f _ GL_LUMINANCE :C sub v = L sub t C sub f:undefined:C sub v = ( 1 - L sub t ) C sub f :C sub v = L sub t \_ALPHA : : : + L sub t C sub c 2: : : : :A sub v = A sub t A sub f:\^:A sub v = A sub t A sub f:A sub v = A sub t _ GL_INTENSITY :C sub v = C sub f I sub t:undefined:C sub v = ( 1 - I sub t ) C sub f :C sub v = I sub t : : :+ I sub t C sub c : : : : \^ :A sub v = A sub f I sub t:\^:A sub v = ( 1 - I sub t ) A sub f :A sub v = I sub t : : :+ I sub t A sub c: _ GL_RGB :C sub v = C sub t C sub f:C sub v = C sub t:C sub v = (1 - C sub t) C sub f :C sub v = C sub t 3: : : + C sub t C sub c : : : : :A sub v = A sub f:A sub v = A sub f:A sub v = A sub f:A sub v = A sub f _ GL_RGBA :C sub v = C sub t C sub f:C sub v = ( 1 - A sub t ) C sub f :C sub v = (1 - C sub t) C sub f :C sub v = C sub t 4: :+ A sub t C sub t: + C sub t C sub c : : : : :A sub v = A sub t A sub f:A sub v = A sub f:A sub v = A sub t A sub f:A sub v = A sub t .TE .sp If pname is GL_TEXTURE_ENV_COLOR , params is a pointer to an array that holds an RGBA color consisting of four values. Integer color components are interpreted linearly such that the most positive integer maps to 1.0, and the most negative integer maps to -1.0. The values are clamped to the range [0,1] when they are specified. C sub c takes these four values.
GL_TEXTURE_ENV_MODE defaults to GL_MODULATE and GL_TEXTURE_ENV_COLOR defaults to (0, 0, 0, 0).
Specifies a texture environment. Must be GL_TEXTURE_ENV .
Specifies the symbolic name of a single-valued texture environment parameter. Must be GL_TEXTURE_ENV_MODE .
Specifies a single symbolic constant, one of GL_MODULATE , GL_DECAL , GL_BLEND , or GL_REPLACE .
Specifies a texture environment. Must be GL_TEXTURE_ENV .
Specifies the symbolic name of a texture environment parameter. Accepted values are GL_TEXTURE_ENV_MODE and GL_TEXTURE_ENV_COLOR .
Specifies a pointer to a parameter array that contains either a single symbolic constant or an RGBA color.
GL_INVALID_ENUM is generated when target or pname is not one of the accepted defined values, or when params should have a defined constant value (based on the value of pname) and does not.
GL_INVALID_OPERATION is generated if glTexEnv is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glTexGen(int coord, int pname, float|int|array(float|int) param)
glTexGen selects a texture-coordinate generation function or supplies coefficients for one of the functions. coord names one of the (s, t, r, q) texture coordinates; it must be one of the symbols GL_S , GL_T , GL_R , or GL_Q . pname must be one of three symbolic constants: GL_TEXTURE_GEN_MODE , GL_OBJECT_PLANE , or GL_EYE_PLANE . If pname is GL_TEXTURE_GEN_MODE , then params chooses a mode, one of GL_OBJECT_LINEAR , GL_EYE_LINEAR , or GL_SPHERE_MAP . If pname is either GL_OBJECT_PLANE or GL_EYE_PLANE , params contains coefficients for the corresponding texture generation function. .P If the texture generation function is GL_OBJECT_LINEAR , the function
.ce g = p sub 1 x sub o + p sub 2 y sub o + p sub 3 z sub o + p sub 4 w sub o
is used, where g is the value computed for the coordinate named in coord, p sub 1, p sub 2, p sub 3, and p sub 4 are the four values supplied in params, and x sub o, y sub o, z sub o, and w sub o are the object coordinates of the vertex. This function can be used, for example, to texture-map terrain using sea level as a reference plane (defined by p sub 1, p sub 2, p sub 3, and p sub 4). The altitude of a terrain vertex is computed by the GL_OBJECT_LINEAR coordinate generation function as its distance from sea level; that altitude can then be used to index the texture image to map white snow onto peaks and green grass onto foothills.
If the texture generation function is GL_EYE_LINEAR , the function
.ce g = {p sub 1} sup prime ~x sub e + {p sub 2} sup prime ~y sub e + {p sub 3} sup prime ~z sub e + {p sub 4} sup prime ~w sub e
is used, where
.ce $( {p sub 1} sup prime ~~{p sub 2} sup prime~~{p sub 3} sup prime~~ {{p sub 4}sup prime}) = ( p sub 1~~ p sub 2~~ p sub 3~~ p sub 4 ) ~M sup -1$
and x sub e, y sub e, z sub e, and w sub e are the eye coordinates of the vertex, p sub 1, p sub 2, p sub 3, and p sub 4 are the values supplied in params, and M is the modelview matrix when glTexGen is invoked. If M is poorly conditioned or singular, texture coordinates generated by the resulting function may be inaccurate or undefined.
Note that the values in params define a reference plane in eye coordinates. The modelview matrix that is applied to them may not be the same one in effect when the polygon vertices are transformed. This function establishes a field of texture coordinates that can produce dynamic contour lines on moving objects.
If pname is GL_SPHERE_MAP and coord is either GL_S or GL_T , s and t texture coordinates are generated as follows. Let u be the unit vector pointing from the origin to the polygon vertex (in eye coordinates). Let n sup prime be the current normal, after transformation to eye coordinates. Let
.ce f ~=~ ( f sub x~~f sub y~~f sub z ) sup T be the reflection vector such that
.ce f ~=~ u ~-~ 2 n sup prime n sup prime sup T u
Finally, let m ~=~ 2 sqrt { f sub x sup {~2} + f sub y sup {~2} + (f sub z + 1 ) sup 2}. Then the values assigned to the s and t texture coordinates are
.ce 1 s ~=~ f sub x over m ~+~ 1 over 2 .sp .ce 1 t ~=~ f sub y over m ~+~ 1 over 2
To enable or disable a texture-coordinate generation function, call glEnable or glDisable with one of the symbolic texture-coordinate names (GL_TEXTURE_GEN_S , GL_TEXTURE_GEN_T , GL_TEXTURE_GEN_R , or GL_TEXTURE_GEN_Q ) as the argument. When enabled, the specified texture coordinate is computed according to the generating function associated with that coordinate. When disabled, subsequent vertices take the specified texture coordinate from the current set of texture coordinates. Initially, all texture generation functions are set to GL_EYE_LINEAR and are disabled. Both s plane equations are (1, 0, 0, 0), both t plane equations are (0, 1, 0, 0), and all r and q plane equations are (0, 0, 0, 0).
Specifies a texture coordinate. Must be one of GL_S , GL_T , GL_R , or GL_Q .
Specifies the symbolic name of the texture-coordinate generation function. Must be GL_TEXTURE_GEN_MODE .
Specifies a single-valued texture generation parameter, one of GL_OBJECT_LINEAR , GL_EYE_LINEAR , or GL_SPHERE_MAP .
Specifies a texture coordinate. Must be one of GL_S , GL_T , GL_R , or GL_Q .
Specifies the symbolic name of the texture-coordinate generation function or function parameters. Must be GL_TEXTURE_GEN_MODE , GL_OBJECT_PLANE , or GL_EYE_PLANE .
Specifies a pointer to an array of texture generation parameters. If pname is GL_TEXTURE_GEN_MODE , then the array must contain a single symbolic constant, one of GL_OBJECT_LINEAR , GL_EYE_LINEAR , or GL_SPHERE_MAP . Otherwise, params holds the coefficients for the texture-coordinate generation function specified by pname.
GL_INVALID_ENUM is generated when coord or pname is not an accepted defined value, or when pname is GL_TEXTURE_GEN_MODE and params is not an accepted defined value.
GL_INVALID_ENUM is generated when pname is GL_TEXTURE_GEN_MODE , params is GL_SPHERE_MAP , and coord is either GL_R or GL_Q .
GL_INVALID_OPERATION is generated if glTexGen is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glTexImage2D(int target, int level, int internalformat, object|mapping(string:object) width, object|mapping(string:object) height, int border, object|mapping(string:object) format, object|mapping(string:object) type, array(object|mapping(string:object)) pixels)
Texturing maps a portion of a specified texture image onto each graphical primitive for which texturing is enabled. To enable and disable two-dimensional texturing, call glEnable and glDisable with argument GL_TEXTURE_2D .
To define texture images, call glTexImage2D . The arguments describe the parameters of the texture image, such as height, width, width of the border, level-of-detail number (see glTexParameter ), and number of color components provided. The last three arguments describe how the image is represented in memory; they are identical to the pixel formats used for glDrawPixels .
If target is GL_PROXY_TEXTURE_2D , no data is read from pixels, but all of the texture image state is recalculated, checked for consistency, and checked against the implementation's capabilities. If the implementation cannot handle a texture of the requested texture size, it sets all of the image state to 0, but does not generate an error (see glGetError ). To query for an entire mipmap array, use an image array level greater than or equal to 1. .P If target is GL_TEXTURE_2D , data is read from pixels as a sequence of signed or unsigned bytes, shorts, or longs, or single-precision floating-point values, depending on type. These values are grouped into sets of one, two, three, or four values, depending on format, to form elements. If type is GL_BITMAP , the data is considered as a string of unsigned bytes (and format must be GL_COLOR_INDEX ). Each data byte is treated as eight 1-bit elements, with bit ordering determined by GL_UNPACK_LSB_FIRST (see glPixelStore ).
The first element corresponds to the lower left corner of the texture image. Subsequent elements progress left-to-right through the remaining texels in the lowest row of the texture image, and then in successively higher rows of the texture image. The final element corresponds to the upper right corner of the texture image.
format determines the composition of each element in pixels. It can assume one of nine symbolic values:
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Refer to the glDrawPixels reference page for a description of the acceptable values for the type parameter.
If an application wants to store the texture at a certain resolution or in a certain format, it can request the resolution and format with internalformat. The GL will choose an internal representation that closely approximates that requested by internalformat, but it may not match exactly. (The representations specified by GL_LUMINANCE , GL_LUMINANCE_ALPHA , GL_RGB , and GL_RGBA must match exactly. The numeric values 1, 2, 3, and 4 may also be used to specify the above representations.)
Use the GL_PROXY_TEXTURE_2D target to try out a resolution and format. The implementation will update and recompute its best match for the requested storage resolution and format. To then query this state, call glGetTexLevelParameter . If the texture cannot be accommodated, texture state is set to 0.
A one-component texture image uses only the red component of the RGBA color extracted from pixels. A two-component image uses the R and A values. A three-component image uses the R, G, and B values. A four-component image uses all of the RGBA components.
Specifies the target texture. Must be GL_TEXTURE_2D or GL_PROXY_TEXTURE_2D .
Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap reduction image.
Specifies the number of color components in the texture. Must be 1, 2, 3, or 4, or one of the following symbolic constants: GL_ALPHA , GL_ALPHA4 , GL_ALPHA8 , GL_ALPHA12 , GL_ALPHA16 , GL_LUMINANCE , GL_LUMINANCE4 , GL_LUMINANCE8 , GL_LUMINANCE12 , GL_LUMINANCE16 , GL_LUMINANCE_ALPHA , GL_LUMINANCE4_ALPHA4 , GL_LUMINANCE6_ALPHA2 , GL_LUMINANCE8_ALPHA8 , GL_LUMINANCE12_ALPHA4 , GL_LUMINANCE12_ALPHA12 , GL_LUMINANCE16_ALPHA16 , GL_INTENSITY , GL_INTENSITY4 , GL_INTENSITY8 , GL_INTENSITY12 , GL_INTENSITY16 , GL_R3_G3_B2 , GL_RGB , GL_RGB4 , GL_RGB5 , GL_RGB8 , GL_RGB10 , GL_RGB12 , GL_RGB16 , GL_RGBA , GL_RGBA2 , GL_RGBA4 , GL_RGB5_A1 , GL_RGBA8 , GL_RGB10_A2 , GL_RGBA12 , or GL_RGBA16 .
Specifies the width of the texture image. Must be 2 sup n + 2 ( "border" ) for some integer n. All implementations support texture images that are at least 64 texels wide.
Specifies the height of the texture image. Must be 2 sup m + 2 ( "border" ) for some integer m. All implementations support texture images that are at least 64 texels high.
Specifies the width of the border. Must be either 0 or 1.
Specifies the format of the pixel data. The following symbolic values are accepted: GL_COLOR_INDEX , GL_RED , GL_GREEN , GL_BLUE , GL_ALPHA , GL_RGB , GL_RGBA , GL_LUMINANCE , and GL_LUMINANCE_ALPHA .
Specifies the data type of the pixel data. The following symbolic values are accepted: GL_UNSIGNED_BYTE , GL_BYTE , GL_BITMAP , GL_UNSIGNED_SHORT , GL_SHORT , GL_UNSIGNED_INT , GL_INT , and GL_FLOAT .
Specifies a pointer to the image data in memory.
GL_INVALID_ENUM is generated if target is not GL_TEXTURE_2D or GL_PROXY_TEXTURE_2D .
GL_INVALID_ENUM is generated if format is not an accepted format constant. Format constants other than GL_STENCIL_INDEX and GL_DEPTH_COMPONENT are accepted.
GL_INVALID_ENUM is generated if type is not a type constant.
GL_INVALID_ENUM is generated if type is GL_BITMAP and format is not GL_COLOR_INDEX .
GL_INVALID_VALUE is generated if level is less than 0. .P .P GL_INVALID_VALUE may be generated if level is greater than $log sub 2$max, where max is the returned value of GL_MAX_TEXTURE_SIZE .
GL_INVALID_VALUE is generated if internalformat is not 1, 2, 3, 4, or one of the accepted resolution and format symbolic constants.
GL_INVALID_VALUE is generated if width or height is less than 0 or greater than 2 + GL_MAX_TEXTURE_SIZE , or if either cannot be represented as 2 sup k + 2("border") for some integer value of k.
GL_INVALID_VALUE is generated if border is not 0 or 1.
GL_INVALID_OPERATION is generated if glTexImage2D is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glTexParameter(int target, int pname, float|int|array(float|int) param)
Texture mapping is a technique that applies an image onto an object's surface as if the image were a decal or cellophane shrink-wrap. The image is created in texture space, with an (s, t) coordinate system. A texture is a one- or two-dimensional image and a set of parameters that determine how samples are derived from the image.
glTexParameter assigns the value or values in params to the texture parameter specified as pname. target defines the target texture, either GL_TEXTURE_1D or GL_TEXTURE_2D . The following symbols are accepted in pname:
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.RE
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Specifies the target texture, which must be either GL_TEXTURE_1D or GL_TEXTURE_2D .
Specifies the symbolic name of a single-valued texture parameter. pname can be one of the following: GL_TEXTURE_MIN_FILTER , GL_TEXTURE_MAG_FILTER , GL_TEXTURE_WRAP_S , GL_TEXTURE_WRAP_T , or GL_TEXTURE_PRIORITY .
Specifies the value of pname.
Specifies the target texture, which must be either GL_TEXTURE_1D or GL_TEXTURE_2D .
Specifies the symbolic name of a texture parameter. pname can be one of the following: GL_TEXTURE_MIN_FILTER , GL_TEXTURE_MAG_FILTER , GL_TEXTURE_WRAP_S , GL_TEXTURE_WRAP_T , GL_TEXTURE_BORDER_COLOR , or GL_TEXTURE_PRIORITY .
Specifies a pointer to an array where the value or values of pname are stored.
GL_INVALID_ENUM is generated if target or pname is not one of the accepted defined values.
GL_INVALID_ENUM is generated if params should have a defined constant value (based on the value of pname) and does not.
GL_INVALID_OPERATION is generated if glTexParameter is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glTexSubImage2D(int target, int level, int xoffset, int yoffset, object|mapping(string:object) width, object|mapping(string:object) height, object|mapping(string:object) format, object|mapping(string:object) type, array(object|mapping(string:object)) pixels)
Texturing maps a portion of a specified texture image onto each graphical primitive for which texturing is enabled. To enable and disable two-dimensional texturing, call glEnable and glDisable with argument GL_TEXTURE_2D .
glTexSubImage2D redefines a contiguous subregion of an existing two-dimensional texture image. The texels referenced by pixels replace the portion of the existing texture array with x indices xoffset and "xoffset"~+~"width"~-~1, inclusive, and y indices yoffset and "yoffset"~+~"height"~-~1, inclusive. This region may not include any texels outside the range of the texture array as it was originally specified. It is not an error to specify a subtexture with zero width or height, but such a specification has no effect.
Specifies the target texture. Must be GL_TEXTURE_2D .
Specifies the level-of-detail number. Level 0 is the base image level. Level n is the nth mipmap reduction image.
Specifies a texel offset in the x direction within the texture array.
Specifies a texel offset in the y direction within the texture array.
Specifies the width of the texture subimage.
Specifies the height of the texture subimage.
Specifies the format of the pixel data. The following symbolic values are accepted: GL_COLOR_INDEX , GL_RED , GL_GREEN , GL_BLUE , GL_ALPHA , GL_RGB , GL_RGBA , GL_LUMINANCE , and GL_LUMINANCE_ALPHA .
Specifies the data type of the pixel data. The following symbolic values are accepted: GL_UNSIGNED_BYTE , GL_BYTE , GL_BITMAP , GL_UNSIGNED_SHORT , GL_SHORT , GL_UNSIGNED_INT , GL_INT , and GL_FLOAT .
Specifies a pointer to the image data in memory.
GL_INVALID_ENUM is generated if target is not GL_TEXTURE_2D .
GL_INVALID_OPERATION is generated if the texture array has not been defined by a previous glTexImage2D operation.
GL_INVALID_VALUE is generated if level is less than 0. .P P GL_INVALID_VALUE may be generated if level is greater than log sub 2max, where max is the returned value of GL_MAX_TEXTURE_SIZE .
GL_INVALID_VALUE is generated if "xoffset" ~<~ ~-b, ("xoffset"~+~"width") ~>~ (w~-~b), "yoffset" ~<~ ~-b, or ("yoffset" ~+~ "height") ~>~ (h~-~b). Where w is the GL_TEXTURE_WIDTH , h is the GL_TEXTURE_HEIGHT , and b is the border width of the texture image being modified. Note that w and h include twice the border width.
GL_INVALID_VALUE is generated if width or height is less than 0.
GL_INVALID_ENUM is generated if format is not an accepted format constant.
GL_INVALID_ENUM is generated if type is not a type constant.
GL_INVALID_ENUM is generated if type is GL_BITMAP and format is not GL_COLOR_INDEX .
GL_INVALID_OPERATION is generated if glTexSubImage2D is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glTranslate(float|int|array(float|int) x, float|int|void y, float|int|void z)
glTranslate produces a translation by ("x","y","z"). The current matrix (see
glMatrixMode ) is multiplied by this translation matrix, with the product replacing the current matrix, as if glMultMatrix were called with the following matrix for its argument: .sp .ce .EQ left ( ~ down 20 matrix { ccol { 1~~ above 0~~ above 0~~ above 0~~ } ccol { 0~~ above 1~~ above 0~~ above 0~~ } ccol { 0~~ above 0~~ above 1~~ above 0~~ } ccol { "x"~ above "y"~ above "z"~ above 1} } ~~right ) .EN .sp .RE If the matrix mode is either GL_MODELVIEW or GL_PROJECTION , all objects drawn after a call to glTranslate are translated.
Use glPushMatrix and glPopMatrix to save and restore the untranslated coordinate system.
Specify the x, y, and z coordinates of a translation vector.
GL_INVALID_OPERATION is generated if glTranslate is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glVertex(float|int|array(float|int) x, float|int|void y, float|int|void z, float|int|void w)
glVertex commands are used within glBegin /glEnd pairs to specify point, line, and polygon vertices. The current color, normal, and texture coordinates are associated with the vertex when glVertex is called.
When only x and y are specified, z defaults to 0 and w defaults to 1. When x, y, and z are specified, w defaults to 1.
Specify x, y, z, and w coordinates of a vertex. Not all parameters are present in all forms of the command.
Specifies a pointer to an array of two, three, or four elements. The elements of a two-element array are x and y; of a three-element array, x, y, and z; and of a four-element array, x, y, z, and w.
void GL.glViewport(int x, int y, int width, int height)
glViewport specifies the affine transformation of x and y from normalized device coordinates to window coordinates. Let (x sub nd, y sub nd) be normalized device coordinates. Then the window coordinates (x sub w, y sub w) are computed as follows: .sp .ce .EQ x sub w ~=~ ( x sub nd + 1 ) left ( "width" over 2 right ) ~+~ "x" .EN .sp .ce .EQ y sub w ~=~ ( y sub nd + 1 ) left ( "height" over 2 right ) ~+~ "y" .EN .RE
Viewport width and height are silently clamped to a range that depends on the implementation. To query this range, call glGet with argument GL_MAX_VIEWPORT_DIMS .
Specify the lower left corner of the viewport rectangle, in pixels. The initial value is (0,0).
Specify the width and height of the viewport. When a GL context is first attached to a window, width and height are set to the dimensions of that window.
GL_INVALID_VALUE is generated if either width or height is negative.
GL_INVALID_OPERATION is generated if glViewport is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glEnd()
glBegin and glEnd delimit the vertices that define a primitive or a group of like primitives. glBegin accepts a single argument that specifies in which of ten ways the vertices are interpreted. Taking n as an integer count starting at one, and N as the total number of vertices specified, the interpretations are as follows:
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Only a subset of GL commands can be used between glBegin and glEnd . The commands are glVertex , glColor , glIndex , glNormal , glTexCoord , glEvalCoord , glEvalPoint , glArrayElement , glMaterial , and glEdgeFlag . Also, it is acceptable to use glCallList or glCallLists to execute display lists that include only the preceding commands. If any other GL command is executed between glBegin and glEnd , the error flag is set and the command is ignored.
Regardless of the value chosen for mode, there is no limit to the number of vertices that can be defined between glBegin and glEnd . Lines, triangles, quadrilaterals, and polygons that are incompletely specified are not drawn. Incomplete specification results when either too few vertices are provided to specify even a single primitive or when an incorrect multiple of vertices is specified. The incomplete primitive is ignored; the rest are drawn.
The minimum specification of vertices for each primitive is as follows: 1 for a point, 2 for a line, 3 for a triangle, 4 for a quadrilateral, and 3 for a polygon. Modes that require a certain multiple of vertices are GL_LINES (2), GL_TRIANGLES (3), GL_QUADS (4), and GL_QUAD_STRIP (2).
Specifies the primitive or primitives that will be created from vertices presented between glBegin and the subsequent glEnd . Ten symbolic constants are accepted: GL_POINTS , GL_LINES , GL_LINE_STRIP , GL_LINE_LOOP , GL_TRIANGLES , GL_TRIANGLE_STRIP , GL_TRIANGLE_FAN , GL_QUADS , GL_QUAD_STRIP , and GL_POLYGON .
GL_INVALID_ENUM is generated if mode is set to an unaccepted value.
GL_INVALID_OPERATION is generated if glBegin is executed between a glBegin and the corresponding execution of glEnd .
GL_INVALID_OPERATION is generated if glEnd is executed without being preceded by a glBegin .
GL_INVALID_OPERATION is generated if a command other than glVertex , glColor , glIndex , glNormal , glTexCoord , glEvalCoord , glEvalPoint , glArrayElement , glMaterial , glEdgeFlag , glCallList , or glCallLists is executed between the execution of glBegin and the corresponding execution glEnd .
Execution of glEnableClientState , glDisableClientState , glEdgeFlagPointer , glTexCoordPointer , glColorPointer , glIndexPointer , glNormalPointer ,
glVertexPointer , glInterleavedArrays , or glPixelStore is not allowed after a call to glBegin and before the corresponding call to glEnd , but an error may or may not be generated.
void GL.glEndList()
Display lists are groups of GL commands that have been stored for subsequent execution. Display lists are created with glNewList . All subsequent commands are placed in the display list, in the order issued, until glEndList is called.
glNewList has two arguments. The first argument, list, is a positive integer that becomes the unique name for the display list. Names can be created and reserved with glGenLists and tested for uniqueness with glIsList . The second argument, mode, is a symbolic constant that can assume one of two values:
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Certain commands are not compiled into the display list but are executed immediately, regardless of the display-list mode. These commands are glColorPointer , glDeleteLists , glDisableClientState , glEdgeFlagPointer , glEnableClientState , glFeedbackBuffer , glFinish , glFlush , glGenLists , glIndexPointer , glInterleavedArrays , glIsEnabled , glIsList , glNormalPointer , glPopClientAttrib , glPixelStore , glPushClientAttrib , glReadPixels , glRenderMode , glSelectBuffer , glTexCoordPointer , glVertexPointer , and all of the glGet commands.
Similarly, glTexImage2D and glTexImage1D are executed immediately and not compiled into the display list when their first argument is GL_PROXY_TEXTURE_2D or GL_PROXY_TEXTURE_1D , respectively.
When glEndList is encountered, the display-list definition is completed by associating the list with the unique name list (specified in the glNewList command). If a display list with name list already exists, it is replaced only when glEndList is called.
Specifies the display-list name.
Specifies the compilation mode, which can be GL_COMPILE or GL_COMPILE_AND_EXECUTE .
GL_INVALID_VALUE is generated if list is 0.
GL_INVALID_ENUM is generated if mode is not an accepted value.
GL_INVALID_OPERATION is generated if glEndList is called without a preceding glNewList , or if glNewList is called while a display list is being defined.
GL_INVALID_OPERATION is generated if glNewList or glEndList is executed between the execution of glBegin and the corresponding execution of glEnd .
GL_OUT_OF_MEMORY is generated if there is insufficient memory to compile the display list. If the GL version is 1.1 or greater, no change is made to the previous contents of the display list, if any, and no other change is made to the GL state. (It is as if no attempt had been made to create the new display list.)
void GL.glFinish()
glFinish does not return until the effects of all previously called GL commands are complete. Such effects include all changes to GL state, all changes to connection state, and all changes to the frame buffer contents.
GL_INVALID_OPERATION is generated if glFinish is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glFlush()
Different GL implementations buffer commands in several different locations, including network buffers and the graphics accelerator itself. glFlush empties all of these buffers, causing all issued commands to be executed as quickly as they are accepted by the actual rendering engine. Though this execution may not be completed in any particular time period, it does complete in finite time.
Because any GL program might be executed over a network, or on an accelerator that buffers commands, all programs should call glFlush whenever they count on having all of their previously issued commands completed. For example, call glFlush before waiting for user input that depends on the generated image.
GL_INVALID_OPERATION is generated if glFlush is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glInitNames()
The name stack is used during selection mode to allow sets of rendering commands to be uniquely identified. It consists of an ordered set of unsigned integers. glInitNames causes the name stack to be initialized to its default empty state.
The name stack is always empty while the render mode is not GL_SELECT . Calls to glInitNames while the render mode is not GL_SELECT are ignored.
GL_INVALID_OPERATION is generated if glInitNames is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glLoadIdentity()
glLoadIdentity replaces the current matrix with the identity matrix. It is semantically equivalent to calling glLoadMatrix with the identity matrix
.ce
.EQ left ( down 20 { ~ matrix { ccol { 1 above 0 above 0 above 0~ } ccol { 0 above 1 above 0 above 0~ } ccol { 0 above 0 above 1 above 0~ } ccol { 0 above 0 above 0 above 1 } } } ~~ right ) .EN
but in some cases it is more efficient.
GL_INVALID_OPERATION is generated if glLoadIdentity is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glPopAttrib()
glPushAttrib takes one argument, a mask that indicates which groups of state variables to save on the attribute stack. Symbolic constants are used to set bits in the mask. mask is typically constructed by ORing several of these constants together. The special mask GL_ALL_ATTRIB_BITS can be used to save all stackable states.
The symbolic mask constants and their associated GL state are as follows (the second column lists which attributes are saved):
.TS ; l l . GL_ACCUM_BUFFER_BIT Accumulation buffer clear value
GL_COLOR_BUFFER_BIT GL_ALPHA_TEST enable bit Alpha test function and reference value GL_BLEND enable bit Blending source and destination functions Constant blend color Blending equation GL_DITHER enable bit GL_DRAW_BUFFER setting GL_COLOR_LOGIC_OP enable bit GL_INDEX_LOGIC_OP enable bit Logic op function Color mode and index mode clear values Color mode and index mode writemasks
GL_CURRENT_BIT Current RGBA color Current color index Current normal vector Current texture coordinates Current raster position GL_CURRENT_RASTER_POSITION_VALID flag RGBA color associated with current raster position Color index associated with current raster position Texture coordinates associated with current raster position GL_EDGE_FLAG flag
GL_DEPTH_BUFFER_BIT GL_DEPTH_TEST enable bit Depth buffer test function Depth buffer clear value GL_DEPTH_WRITEMASK enable bit
GL_ENABLE_BIT GL_ALPHA_TEST flag GL_AUTO_NORMAL flag GL_BLEND flag Enable bits for the user-definable clipping planes GL_COLOR_MATERIAL GL_CULL_FACE flag GL_DEPTH_TEST flag GL_DITHER flag GL_FOG flag GL_LIGHT i where 0\ <= i<GL_MAX_LIGHTS GL_LIGHTING flag GL_LINE_SMOOTH flag GL_LINE_STIPPLE flag GL_COLOR_LOGIC_OP flag GL_INDEX_LOGIC_OP flag GL_MAP1_ x where x is a map type GL_MAP2_ x where x is a map type GL_NORMALIZE flag GL_POINT_SMOOTH flag GL_POLYGON_OFFSET_LINE flag GL_POLYGON_OFFSET_FILL flag GL_POLYGON_OFFSET_POINT flag GL_POLYGON_SMOOTH flag GL_POLYGON_STIPPLE flag GL_SCISSOR_TEST flag GL_STENCIL_TEST flag GL_TEXTURE_1D flag GL_TEXTURE_2D flag Flags GL_TEXTURE_GEN_ x where x is S, T, R, or Q
GL_EVAL_BIT GL_MAP1_ x enable bits, where x is a map type GL_MAP2_ x enable bits, where x is a map type 1D grid endpoints and divisions 2D grid endpoints and divisions GL_AUTO_NORMAL enable bit
GL_FOG_BIT GL_FOG enable bit Fog color Fog density Linear fog start Linear fog end Fog index GL_FOG_MODE value
GL_HINT_BIT GL_PERSPECTIVE_CORRECTION_HINT setting GL_POINT_SMOOTH_HINT setting GL_LINE_SMOOTH_HINT setting GL_POLYGON_SMOOTH_HINT setting GL_FOG_HINT setting
GL_LIGHTING_BIT GL_COLOR_MATERIAL enable bit GL_COLOR_MATERIAL_FACE value Color material parameters that are tracking the current color Ambient scene color GL_LIGHT_MODEL_LOCAL_VIEWER value GL_LIGHT_MODEL_TWO_SIDE setting GL_LIGHTING enable bit Enable bit for each light Ambient, diffuse, and specular intensity for each light Direction, position, exponent, and cutoff angle for each light Constant, linear, and quadratic attenuation factors for each light Ambient, diffuse, specular, and emissive color for each material Ambient, diffuse, and specular color indices for each material Specular exponent for each material GL_SHADE_MODEL setting
GL_LINE_BIT GL_LINE_SMOOTH flag GL_LINE_STIPPLE enable bit Line stipple pattern and repeat counter Line width
GL_LIST_BIT GL_LIST_BASE setting
GL_PIXEL_MODE_BIT GL_RED_BIAS and GL_RED_SCALE settings GL_GREEN_BIAS and GL_GREEN_SCALE values GL_BLUE_BIAS and GL_BLUE_SCALE GL_ALPHA_BIAS and GL_ALPHA_SCALE GL_DEPTH_BIAS and GL_DEPTH_SCALE GL_INDEX_OFFSET and GL_INDEX_SHIFT values GL_MAP_COLOR and GL_MAP_STENCIL flags GL_ZOOM_X and GL_ZOOM_Y factors GL_READ_BUFFER setting
GL_POINT_BIT GL_POINT_SMOOTH flag Point size
GL_POLYGON_BIT GL_CULL_FACE enable bit GL_CULL_FACE_MODE value GL_FRONT_FACE indicator GL_POLYGON_MODE setting GL_POLYGON_SMOOTH flag GL_POLYGON_STIPPLE enable bit GL_POLYGON_OFFSET_FILL flag GL_POLYGON_OFFSET_LINE flag GL_POLYGON_OFFSET_POINT flag GL_POLYGON_OFFSET_FACTOR GL_POLYGON_OFFSET_UNITS
GL_POLYGON_STIPPLE_BIT Polygon stipple image
GL_SCISSOR_BIT GL_SCISSOR_TEST flag Scissor box
GL_STENCIL_BUFFER_BIT GL_STENCIL_TEST enable bit Stencil function and reference value Stencil value mask Stencil fail, pass, and depth buffer pass actions Stencil buffer clear value Stencil buffer writemask
GL_TEXTURE_BIT Enable bits for the four texture coordinates Border color for each texture image Minification function for each texture image Magnification function for each texture image Texture coordinates and wrap mode for each texture image Color and mode for each texture environment Enable bits GL_TEXTURE_GEN_ x, x is S, T, R, and Q GL_TEXTURE_GEN_MODE setting for S, T, R, and Q glTexGen plane equations for S, T, R, and Q Current texture bindings (for example, GL_TEXTURE_2D_BINDING )
GL_TRANSFORM_BIT Coefficients of the six clipping planes Enable bits for the user-definable clipping planes GL_MATRIX_MODE value GL_NORMALIZE flag
GL_VIEWPORT_BIT Depth range (near and far) Viewport origin and extent .TE
glPopAttrib restores the values of the state variables saved with the last
glPushAttrib command. Those not saved are left unchanged.
It is an error to push attributes onto a full stack, or to pop attributes off an empty stack. In either case, the error flag is set and no other change is made to GL state.
Initially, the attribute stack is empty.
Specifies a mask that indicates which attributes to save. Values for mask are listed below.
GL_STACK_OVERFLOW is generated if glPushAttrib is called while the attribute stack is full.
GL_STACK_UNDERFLOW is generated if glPopAttrib is called while the attribute stack is empty.
GL_INVALID_OPERATION is generated if glPushAttrib or glPopAttrib is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glPopClientAttrib()
glPushClientAttrib takes one argument, a mask that indicates which groups of client-state variables to save on the client attribute stack. Symbolic constants are used to set bits in the mask. mask is typically constructed by OR'ing several of these constants together. The special mask GL_CLIENT_ALL_ATTRIB_BITS can be used to save all stackable client state.
The symbolic mask constants and their associated GL client state are as follows (the second column lists which attributes are saved):
GL_CLIENT_PIXEL_STORE_BIT Pixel storage modes
GL_CLIENT_VERTEX_ARRAY_BIT Vertex arrays (and enables)
glPopClientAttrib restores the values of the client-state variables saved with the last glPushClientAttrib . Those not saved are left unchanged.
It is an error to push attributes onto a full client attribute stack, or to pop attributes off an empty stack. In either case, the error flag is set, and no other change is made to GL state.
Initially, the client attribute stack is empty.
Specifies a mask that indicates which attributes to save. Values for mask are listed below.
GL_STACK_OVERFLOW is generated if glPushClientAttrib is called while the attribute stack is full.
GL_STACK_UNDERFLOW is generated if glPopClientAttrib is called while the attribute stack is empty.
void GL.glPopMatrix()
There is a stack of matrices for each of the matrix modes. In GL_MODELVIEW mode, the stack depth is at least 32. In the other two modes, GL_PROJECTION and GL_TEXTURE , the depth is at least 2. The current matrix in any mode is the matrix on the top of the stack for that mode.
glPushMatrix pushes the current matrix stack down by one, duplicating the current matrix. That is, after a glPushMatrix call, the matrix on top of the stack is identical to the one below it.
glPopMatrix pops the current matrix stack, replacing the current matrix with the one below it on the stack.
Initially, each of the stacks contains one matrix, an identity matrix.
It is an error to push a full matrix stack, or to pop a matrix stack that contains only a single matrix. In either case, the error flag is set and no other change is made to GL state.
GL_STACK_OVERFLOW is generated if glPushMatrix is called while the current matrix stack is full.
GL_STACK_UNDERFLOW is generated if glPopMatrix is called while the current matrix stack contains only a single matrix.
GL_INVALID_OPERATION is generated if glPushMatrix or glPopMatrix is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glPopName()
The name stack is used during selection mode to allow sets of rendering commands to be uniquely identified. It consists of an ordered set of unsigned integers and is initially empty.
glPushName causes name to be pushed onto the name stack. glPopName pops one name off the top of the stack.
The maximum name stack depth is implementation-dependent; call GL_MAX_NAME_STACK_DEPTH to find out the value for a particular implementation. It is an error to push a name onto a full stack, or to pop a name off an empty stack. It is also an error to manipulate the name stack between the execution of glBegin and the corresponding execution of glEnd . In any of these cases, the error flag is set and no other change is made to GL state.
The name stack is always empty while the render mode is not GL_SELECT . Calls to glPushName or glPopName while the render mode is not GL_SELECT are ignored.
Specifies a name that will be pushed onto the name stack.
GL_STACK_OVERFLOW is generated if glPushName is called while the name stack is full.
GL_STACK_UNDERFLOW is generated if glPopName is called while the name stack is empty.
GL_INVALID_OPERATION is generated if glPushName or glPopName is executed between a call to glBegin and the corresponding call to glEnd .
void GL.glPushMatrix()
There is a stack of matrices for each of the matrix modes. In GL_MODELVIEW mode, the stack depth is at least 32. In the other two modes, GL_PROJECTION and GL_TEXTURE , the depth is at least 2. The current matrix in any mode is the matrix on the top of the stack for that mode.
glPushMatrix pushes the current matrix stack down by one, duplicating the current matrix. That is, after a glPushMatrix call, the matrix on top of the stack is identical to the one below it.
glPopMatrix pops the current matrix stack, replacing the current matrix with the one below it on the stack.
Initially, each of the stacks contains one matrix, an identity matrix.
It is an error to push a full matrix stack, or to pop a matrix stack that contains only a single matrix. In either case, the error flag is set and no other change is made to GL state.
GL_STACK_OVERFLOW is generated if glPushMatrix is called while the current matrix stack is full.
GL_STACK_UNDERFLOW is generated if glPopMatrix is called while the current matrix stack contains only a single matrix.
GL_INVALID_OPERATION is generated if glPushMatrix or glPopMatrix is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glBegin(int mode)
glBegin and glEnd delimit the vertices that define a primitive or a group of like primitives. glBegin accepts a single argument that specifies in which of ten ways the vertices are interpreted. Taking n as an integer count starting at one, and N as the total number of vertices specified, the interpretations are as follows:
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Only a subset of GL commands can be used between glBegin and glEnd . The commands are glVertex , glColor , glIndex , glNormal , glTexCoord , glEvalCoord , glEvalPoint , glArrayElement , glMaterial , and glEdgeFlag . Also, it is acceptable to use glCallList or glCallLists to execute display lists that include only the preceding commands. If any other GL command is executed between glBegin and glEnd , the error flag is set and the command is ignored.
Regardless of the value chosen for mode, there is no limit to the number of vertices that can be defined between glBegin and glEnd . Lines, triangles, quadrilaterals, and polygons that are incompletely specified are not drawn. Incomplete specification results when either too few vertices are provided to specify even a single primitive or when an incorrect multiple of vertices is specified. The incomplete primitive is ignored; the rest are drawn.
The minimum specification of vertices for each primitive is as follows: 1 for a point, 2 for a line, 3 for a triangle, 4 for a quadrilateral, and 3 for a polygon. Modes that require a certain multiple of vertices are GL_LINES (2), GL_TRIANGLES (3), GL_QUADS (4), and GL_QUAD_STRIP (2).
Specifies the primitive or primitives that will be created from vertices presented between glBegin and the subsequent glEnd . Ten symbolic constants are accepted: GL_POINTS , GL_LINES , GL_LINE_STRIP , GL_LINE_LOOP , GL_TRIANGLES , GL_TRIANGLE_STRIP , GL_TRIANGLE_FAN , GL_QUADS , GL_QUAD_STRIP , and GL_POLYGON .
GL_INVALID_ENUM is generated if mode is set to an unaccepted value.
GL_INVALID_OPERATION is generated if glBegin is executed between a glBegin and the corresponding execution of glEnd .
GL_INVALID_OPERATION is generated if glEnd is executed without being preceded by a glBegin .
GL_INVALID_OPERATION is generated if a command other than glVertex , glColor , glIndex , glNormal , glTexCoord , glEvalCoord , glEvalPoint , glArrayElement , glMaterial , glEdgeFlag , glCallList , or glCallLists is executed between the execution of glBegin and the corresponding execution glEnd .
Execution of glEnableClientState , glDisableClientState , glEdgeFlagPointer , glTexCoordPointer , glColorPointer , glIndexPointer , glNormalPointer ,
glVertexPointer , glInterleavedArrays , or glPixelStore is not allowed after a call to glBegin and before the corresponding call to glEnd , but an error may or may not be generated.
void GL.glCullFace(int mode)
glCullFace specifies whether front- or back-facing facets are culled (as specified by mode) when facet culling is enabled. Facet culling is initially disabled. To enable and disable facet culling, call the glEnable and glDisable commands with the argument GL_CULL_FACE . Facets include triangles, quadrilaterals, polygons, and rectangles.
glFrontFace specifies which of the clockwise and counterclockwise facets are front-facing and back-facing. See glFrontFace .
Specifies whether front- or back-facing facets are candidates for culling. Symbolic constants GL_FRONT , GL_BACK , and GL_FRONT_AND_BACK are accepted. The initial value is GL_BACK .
GL_INVALID_ENUM is generated if mode is not an accepted value.
GL_INVALID_OPERATION is generated if glCullFace is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glDepthFunc(int func)
glDepthFunc specifies the function used to compare each incoming pixel depth value with the depth value present in the depth buffer. The comparison is performed only if depth testing is enabled. (See glEnable and glDisable of GL_DEPTH_TEST .)
func specifies the conditions under which the pixel will be drawn. The comparison functions are as follows:
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The initial value of func is GL_LESS . Initially, depth testing is disabled. .NOTES Even if the depth buffer exists and the depth mask is non-zero, the depth buffer is not updated if the depth test is disabled.
Specifies the depth comparison function. Symbolic constants GL_NEVER , GL_LESS , GL_EQUAL , GL_LEQUAL , GL_GREATER , GL_NOTEQUAL , GL_GEQUAL , and GL_ALWAYS are accepted. The initial value is GL_LESS .
GL_INVALID_ENUM is generated if func is not an accepted value.
GL_INVALID_OPERATION is generated if glDepthFunc is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glDisable(int cap)
glEnable and glDisable enable and disable various capabilities. Use glIsEnabled or glGet to determine the current setting of any capability. The initial value for each capability with the exception of GL_DITHER is GL_FALSE . The initial value for GL_DITHER is GL_TRUE .
Both glEnable and glDisable take a single argument, cap, which can assume one of the following values:
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Specifies a symbolic constant indicating a GL capability.
Specifies a symbolic constant indicating a GL capability.
GL_INVALID_ENUM is generated if cap is not one of the values listed previously.
GL_INVALID_OPERATION is generated if glEnable or glDisable is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glDisableClientState(int cap)
glEnableClientState and glDisableClientState enable or disable individual client-side capabilities. By default, all client-side capabilities are disabled. Both glEnableClientState and glDisableClientState take a single argument, cap, which can assume one of the following values:
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Specifies the capability to enable. Symbolic constants GL_COLOR_ARRAY , GL_EDGE_FLAG_ARRAY , GL_INDEX_ARRAY , GL_NORMAL_ARRAY , GL_TEXTURE_COORD_ARRAY , and GL_VERTEX_ARRAY are accepted.
Specifies the capability to disable.
GL_INVALID_ENUM is generated if cap is not an accepted value.
glEnableClientState is not allowed between the execution of glBegin and the corresponding glEnd , but an error may or may not be generated. If no error is generated, the behavior is undefined.
void GL.glDrawBuffer(int mode)
When colors are written to the frame buffer, they are written into the color buffers specified by glDrawBuffer . The specifications are as follows:
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If more than one color buffer is selected for drawing, then blending or logical operations are computed and applied independently for each color buffer and can produce different results in each buffer.
Monoscopic contexts include only .I left buffers, and stereoscopic contexts include both .I left and .I right buffers. Likewise, single-buffered contexts include only .I front buffers, and double-buffered contexts include both .I front and .I back buffers. The context is selected at GL initialization.
Specifies up to four color buffers to be drawn into. Symbolic constants GL_NONE , GL_FRONT_LEFT , GL_FRONT_RIGHT , GL_BACK_LEFT , GL_BACK_RIGHT , GL_FRONT , GL_BACK , GL_LEFT , GL_RIGHT , GL_FRONT_AND_BACK , and GL_AUXi, where i is between 0 and ``GL_AUX_BUFFERS '' -1, are accepted (GL_AUX_BUFFERS is not the upper limit; use glGet to query the number of available aux buffers.) The initial value is GL_FRONT for single-buffered contexts, and GL_BACK for double-buffered contexts.
GL_INVALID_ENUM is generated if mode is not an accepted value.
GL_INVALID_OPERATION is generated if none of the buffers indicated by mode exists.
GL_INVALID_OPERATION is generated if glDrawBuffer is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glEnable(int cap)
glEnable and glDisable enable and disable various capabilities. Use glIsEnabled or glGet to determine the current setting of any capability. The initial value for each capability with the exception of GL_DITHER is GL_FALSE . The initial value for GL_DITHER is GL_TRUE .
Both glEnable and glDisable take a single argument, cap, which can assume one of the following values:
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Specifies a symbolic constant indicating a GL capability.
Specifies a symbolic constant indicating a GL capability.
GL_INVALID_ENUM is generated if cap is not one of the values listed previously.
GL_INVALID_OPERATION is generated if glEnable or glDisable is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glEnableClientState(int cap)
glEnableClientState and glDisableClientState enable or disable individual client-side capabilities. By default, all client-side capabilities are disabled. Both glEnableClientState and glDisableClientState take a single argument, cap, which can assume one of the following values:
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Specifies the capability to enable. Symbolic constants GL_COLOR_ARRAY , GL_EDGE_FLAG_ARRAY , GL_INDEX_ARRAY , GL_NORMAL_ARRAY , GL_TEXTURE_COORD_ARRAY , and GL_VERTEX_ARRAY are accepted.
Specifies the capability to disable.
GL_INVALID_ENUM is generated if cap is not an accepted value.
glEnableClientState is not allowed between the execution of glBegin and the corresponding glEnd , but an error may or may not be generated. If no error is generated, the behavior is undefined.
void GL.glFrontFace(int mode)
In a scene composed entirely of opaque closed surfaces, back-facing polygons are never visible. Eliminating these invisible polygons has the obvious benefit of speeding up the rendering of the image. To enable and disable elimination of back-facing polygons, call glEnable and glDisable with argument GL_CULL_FACE .
The projection of a polygon to window coordinates is said to have clockwise winding if an imaginary object following the path from its first vertex, its second vertex, and so on, to its last vertex, and finally back to its first vertex, moves in a clockwise direction about the interior of the polygon. The polygon's winding is said to be counterclockwise if the imaginary object following the same path moves in a counterclockwise direction about the interior of the polygon. glFrontFace specifies whether polygons with clockwise winding in window coordinates, or counterclockwise winding in window coordinates, are taken to be front-facing. Passing GL_CCW to mode selects counterclockwise polygons as front-facing; GL_CW selects clockwise polygons as front-facing. By default, counterclockwise polygons are taken to be front-facing.
Specifies the orientation of front-facing polygons. GL_CW and GL_CCW are accepted. The initial value is GL_CCW .
GL_INVALID_ENUM is generated if mode is not an accepted value.
GL_INVALID_OPERATION is generated if glFrontFace is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glLogicOp(int opcode)
glLogicOp specifies a logical operation that, when enabled, is applied between the incoming color index or RGBA color and the color index or RGBA color at the corresponding location in the frame buffer. To enable or disable the logical operation, call glEnable and glDisable using the symbolic constant GL_COLOR_LOGIC_OP for RGBA mode or GL_INDEX_LOGIC_OP for color index mode. The initial value is disabled for both operations.
.ne .TS center box ; ci | ci c | c . opcode resulting value = GL_CLEAR 0 GL_SET 1 GL_COPY s GL_COPY_INVERTED ~s GL_NOOP d GL_INVERT ~d GL_AND s & d GL_NAND ~(s & d) GL_OR s | d GL_NOR ~(s | d) GL_XOR s ^ d GL_EQUIV ~(s ^ d) GL_AND_REVERSE s & ~d GL_AND_INVERTED ~s & d GL_OR_REVERSE s | ~d GL_OR_INVERTED ~s | d .TE
opcode is a symbolic constant chosen from the list above. In the explanation of the logical operations, s represents the incoming color index and d represents the index in the frame buffer. Standard C-language operators are used. As these bitwise operators suggest, the logical operation is applied independently to each bit pair of the source and destination indices or colors.
Specifies a symbolic constant that selects a logical operation. The following symbols are accepted: GL_CLEAR , GL_SET , GL_COPY , GL_COPY_INVERTED , GL_NOOP , GL_INVERT , GL_AND , GL_NAND , GL_OR , GL_NOR , GL_XOR , GL_EQUIV , GL_AND_REVERSE , GL_AND_INVERTED , GL_OR_REVERSE , and GL_OR_INVERTED . The initial value is GL_COPY .
GL_INVALID_ENUM is generated if opcode is not an accepted value.
GL_INVALID_OPERATION is generated if glLogicOp is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glMatrixMode(int mode)
glMatrixMode sets the current matrix mode. mode can assume one of three values:
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To find out which matrix stack is currently the target of all matrix operations, call glGet with argument GL_MATRIX_MODE . The initial value is GL_MODELVIEW .
Specifies which matrix stack is the target for subsequent matrix operations. Three values are accepted: GL_MODELVIEW , GL_PROJECTION , and GL_TEXTURE . The initial value is GL_MODELVIEW .
GL_INVALID_ENUM is generated if mode is not an accepted value.
GL_INVALID_OPERATION is generated if glMatrixMode is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glReadBuffer(int mode)
glReadBuffer specifies a color buffer as the source for subsequent glReadPixels , glCopyTexImage1D , glCopyTexImage2D , glCopyTexSubImage1D , glCopyTexSubImage2D , and glCopyPixels commands. mode accepts one of twelve or more predefined values. (GL_AUX0 through GL_AUX3 are always defined.) In a fully configured system, GL_FRONT , GL_LEFT , and GL_FRONT_LEFT all name the front left buffer, GL_FRONT_RIGHT and GL_RIGHT name the front right buffer, and GL_BACK_LEFT and GL_BACK name the back left buffer.
Nonstereo double-buffered configurations have only a front left and a back left buffer. Single-buffered configurations have a front left and a front right buffer if stereo, and only a front left buffer if nonstereo. It is an error to specify a nonexistent buffer to glReadBuffer .
mode is initially GL_FRONT in single-buffered configurations, and GL_BACK in double-buffered configurations.
Specifies a color buffer. Accepted values are GL_FRONT_LEFT , GL_FRONT_RIGHT , GL_BACK_LEFT , GL_BACK_RIGHT , GL_FRONT , GL_BACK , GL_LEFT , GL_RIGHT , and GL_AUXi, where i is between 0 and GL_AUX_BUFFERS -1.
GL_INVALID_ENUM is generated if mode is not one of the twelve (or more) accepted values.
GL_INVALID_OPERATION is generated if mode specifies a buffer that does not exist.
GL_INVALID_OPERATION is generated if glReadBuffer is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glRenderMode(int mode)
glRenderMode sets the rasterization mode. It takes one argument, mode, which can assume one of three predefined values:
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The return value of glRenderMode is determined by the render mode at the time glRenderMode is called, rather than by mode. The values returned for the three render modes are as follows:
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See the glSelectBuffer and glFeedbackBuffer reference pages for more details concerning selection and feedback operation.
Specifies the rasterization mode. Three values are accepted: GL_RENDER , GL_SELECT , and GL_FEEDBACK . The initial value is GL_RENDER .
GL_INVALID_ENUM is generated if mode is not one of the three accepted values.
GL_INVALID_OPERATION is generated if glSelectBuffer is called while the render mode is GL_SELECT , or if glRenderMode is called with argument GL_SELECT before glSelectBuffer is called at least once.
GL_INVALID_OPERATION is generated if glFeedbackBuffer is called while the render mode is GL_FEEDBACK , or if glRenderMode is called with argument GL_FEEDBACK before glFeedbackBuffer is called at least once.
GL_INVALID_OPERATION is generated if glRenderMode is executed between the execution of glBegin and the corresponding execution of glEnd .
void GL.glShadeModel(int mode)
GL primitives can have either flat or smooth shading. Smooth shading, the default, causes the computed colors of vertices to be interpolated as the primitive is rasterized, typically assigning different colors to each resulting pixel fragment. Flat shading selects the computed color of just one vertex and assigns it to all the pixel fragments generated by rasterizing a single primitive. In either case, the computed color of a vertex is the result of lighting if lighting is enabled, or it is the current color at the time the vertex was specified if lighting is disabled.
Flat and smooth shading are indistinguishable for points. Starting when glBegin is issued and counting vertices and primitives from 1, the GL gives each flat-shaded line segment i the computed color of vertex i + 1, its second vertex. Counting similarly from 1, the GL gives each flat-shaded polygon the computed color of the vertex listed in the following table. This is the last vertex to specify the polygon in all cases except single polygons, where the first vertex specifies the flat-shaded color. .sp .TS center box; l | c . primitive type of polygon i vertex = Single polygon ( i == 1 ) 1 Triangle strip i + 2 Triangle fan i + 2 Independent triangle 3 i Quad strip 2 i + 2 Independent quad 4 i .TE .sp Flat and smooth shading are specified by glShadeModel with mode set to GL_FLAT and GL_SMOOTH , respectively.
Specifies a symbolic value representing a shading technique. Accepted values are GL_FLAT and GL_SMOOTH . The initial value is GL_SMOOTH .
GL_INVALID_ENUM is generated if mode is any value other than GL_FLAT or GL_SMOOTH .
GL_INVALID_OPERATION is generated if glShadeModel is executed between the execution of glBegin and the corresponding execution of glEnd .
constant GL.GL_2D
Used in glFeedbackBuffer
constant GL.GL_2_BYTES
Used in glCallLists
constant GL.GL_3D
Used in glFeedbackBuffer
constant GL.GL_3D_COLOR
Used in glFeedbackBuffer
constant GL.GL_3D_COLOR_TEXTURE
Used in glFeedbackBuffer
constant GL.GL_3_BYTES
Used in glCallLists
constant GL.GL_4D_COLOR_TEXTURE
Used in glFeedbackBuffer
constant GL.GL_4_BYTES
Used in glCallLists
constant GL.GL_ABGR_EXT
constant GL.GL_ACCUM
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv , glAccum , glGetDoublev and glClear
constant GL.GL_ACCUM_ALPHA_BITS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glAccum and glGetDoublev
constant GL.GL_ACCUM_BLUE_BITS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glAccum and glGetDoublev
constant GL.GL_ACCUM_BUFFER_BIT
Used in glPopAttrib , glPushAttrib and glClear
constant GL.GL_ACCUM_CLEAR_VALUE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_ACCUM_GREEN_BITS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glAccum and glGetDoublev
constant GL.GL_ACCUM_RED_BITS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glAccum and glGetDoublev
constant GL.GL_ADD
Used in glAccum
constant GL.GL_ALL_ATTRIB_BITS
Used in glPopAttrib and glPushAttrib
constant GL.GL_ALPHA
Used in glIsEnabled , glTexEnv , glGetIntegerv , glDrawPixels , glDisable , glCopyTexImage1D , glTexSubImage2D , glPopAttrib , glEnable , glPixelTransfer , glGetBooleanv , glGetTexImage , glPushAttrib , glGetFloatv , glGetDoublev , glAlphaFunc , glReadPixels , glCopyTexImage2D , glTexImage2D , glTexSubImage1D and glTexImage1D
constant GL.GL_ALPHA12
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_ALPHA16
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_ALPHA4
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_ALPHA8
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_ALPHA_BIAS
Used in glGetIntegerv , glPopAttrib , glPixelTransfer , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_ALPHA_BITS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_ALPHA_SCALE
Used in glGetIntegerv , glPopAttrib , glPixelTransfer , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_ALPHA_TEST
Used in glIsEnabled , glGetIntegerv , glDisable , glPopAttrib , glEnable , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glAlphaFunc
constant GL.GL_ALPHA_TEST_FUNC
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_ALPHA_TEST_REF
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_ALWAYS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev , glAlphaFunc , glDepthFunc and glStencilFunc
constant GL.GL_AMBIENT
Used in glGetIntegerv , glColorMaterial , glGetLight , glGetBooleanv , glGetFloatv , glMaterial , glGetDoublev , glLight and glGetMaterial
constant GL.GL_AMBIENT_AND_DIFFUSE
Used in glGetIntegerv , glColorMaterial , glGetBooleanv , glGetFloatv , glMaterial and glGetDoublev
constant GL.GL_AND
Used in glLogicOp
constant GL.GL_AND_INVERTED
Used in glLogicOp
constant GL.GL_AND_REVERSE
Used in glLogicOp
constant GL.GL_ATTRIB_STACK_DEPTH
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_AUTO_NORMAL
Used in glIsEnabled , glGetIntegerv , glDisable , glPopAttrib , glEnable , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glEvalCoord
constant GL.GL_AUX0
Used in glReadBuffer
constant GL.GL_AUX1
constant GL.GL_AUX2
constant GL.GL_AUX3
Used in glReadBuffer
constant GL.GL_AUX_BUFFERS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glReadBuffer , glGetDoublev and glDrawBuffer
constant GL.GL_AVERAGE_EXT
constant GL.GL_BACK
Used in glGetIntegerv , glColorMaterial , glCullFace , glPolygonMode , glGetBooleanv , glGetFloatv , glReadBuffer , glMaterial , glGetDoublev , glDrawBuffer and glGetMaterial
constant GL.GL_BACK_LEFT
Used in glReadBuffer and glDrawBuffer
constant GL.GL_BACK_RIGHT
Used in glReadBuffer and glDrawBuffer
constant GL.GL_BGR
constant GL.GL_BGRA
constant GL.GL_BITMAP
Used in glDrawPixels , glTexSubImage2D , glGetTexImage , glReadPixels , glTexImage2D , glFeedbackBuffer , glGetPolygonStipple , glBitmap , glTexSubImage1D , glTexImage1D and glPolygonStipple
constant GL.GL_BITMAP_TOKEN
Used in glFeedbackBuffer
constant GL.GL_BLEND
Used in glIsEnabled , glTexEnv , glGetIntegerv , glBlendColorEXT , glBlendFunc , glDisable , glPopAttrib , glEnable , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_BLEND_COLOR_EXT
Used in glGetIntegerv , glBlendColorEXT , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_BLEND_DST
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_BLEND_EQUATION_EXT
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_BLEND_SRC
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_BLUE
Used in glGetIntegerv , glDrawPixels , glTexSubImage2D , glPopAttrib , glPixelTransfer , glGetBooleanv , glGetTexImage , glPushAttrib , glGetFloatv , glGetDoublev , glReadPixels , glTexImage2D , glTexSubImage1D and glTexImage1D
constant GL.GL_BLUE_BIAS
Used in glGetIntegerv , glPopAttrib , glPixelTransfer , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_BLUE_BITS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_BLUE_SCALE
Used in glGetIntegerv , glPopAttrib , glPixelTransfer , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_BYTE
Used in glDrawPixels , glColorPointer , glTexSubImage2D , glNormalPointer , glGetTexImage , glCallLists , glReadPixels , glTexImage2D , glTexSubImage1D and glTexImage1D
constant GL.GL_C3F_V3F
Used in glInterleavedArrays
constant GL.GL_C4F_N3F_V3F
Used in glInterleavedArrays
constant GL.GL_C4UB_V2F
Used in glInterleavedArrays
constant GL.GL_C4UB_V3F
Used in glInterleavedArrays
constant GL.GL_CCW
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glFrontFace
constant GL.GL_CLAMP
Used in glTexParameter
constant GL.GL_CLEAR
Used in glLogicOp
constant GL.GL_CLIENT_ALL_ATTRIB_BITS
Used in glPopClientAttrib and glPushClientAttrib
constant GL.GL_CLIENT_ATTRIB_STACK_DEPTH
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_CLIENT_PIXEL_STORE_BIT
Used in glPopClientAttrib and glPushClientAttrib
constant GL.GL_CLIENT_VERTEX_ARRAY_BIT
Used in glPopClientAttrib and glPushClientAttrib
constant GL.GL_CLIP_PLANE0
constant GL.GL_CLIP_PLANE1
constant GL.GL_CLIP_PLANE2
constant GL.GL_CLIP_PLANE3
constant GL.GL_CLIP_PLANE4
constant GL.GL_CLIP_PLANE5
constant GL.GL_COEFF
Used in glGetMap
constant GL.GL_COLOR
Used in glIsEnabled , glGetIntegerv , glDrawElements , glDrawArrays , glColorMaterial , glDrawPixels , glDisable , glColorPointer , glTexSubImage2D , glPopAttrib , glEnable , glEnableClientState , glGetPointerv , glPixelTransfer , glLogicOp , glGetBooleanv , glGetTexImage , glPushAttrib , glGetFloatv , glMaterial , glGetDoublev , glReadPixels , glTexImage2D , glGetPolygonStipple , glBitmap , glCopyPixels , glLightModel , glDisableClientState , glTexSubImage1D , glTexImage1D , glGetMaterial , glClear and glPolygonStipple
constant GL.GL_COLOR_ARRAY
Used in glIsEnabled , glGetIntegerv , glDrawElements , glDrawArrays , glColorPointer , glEnableClientState , glGetPointerv , glGetBooleanv , glGetFloatv , glGetDoublev and glDisableClientState
constant GL.GL_COLOR_ARRAY_POINTER
Used in glGetPointerv
constant GL.GL_COLOR_ARRAY_SIZE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_COLOR_ARRAY_STRIDE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_COLOR_ARRAY_TYPE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_COLOR_BUFFER_BIT
Used in glPopAttrib , glPushAttrib and glClear
constant GL.GL_COLOR_CLEAR_VALUE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_COLOR_INDEX
Used in glDrawPixels , glTexSubImage2D , glPixelTransfer , glGetTexImage , glMaterial , glReadPixels , glTexImage2D , glGetPolygonStipple , glBitmap , glLightModel , glTexSubImage1D , glTexImage1D , glGetMaterial and glPolygonStipple
constant GL.GL_COLOR_INDEXES
Used in glMaterial , glLightModel and glGetMaterial
constant GL.GL_COLOR_LOGIC_OP
Used in glIsEnabled , glGetIntegerv , glDisable , glPopAttrib , glEnable , glLogicOp , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_COLOR_MATERIAL
Used in glIsEnabled , glGetIntegerv , glColorMaterial , glDisable , glPopAttrib , glEnable , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_COLOR_MATERIAL_FACE
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_COLOR_MATERIAL_PARAMETER
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_COLOR_TABLE_ALPHA_SIZE_SGI
constant GL.GL_COLOR_TABLE_BIAS_SGI
constant GL.GL_COLOR_TABLE_BLUE_SIZE_SGI
constant GL.GL_COLOR_TABLE_FORMAT_SGI
constant GL.GL_COLOR_TABLE_GREEN_SIZE_SGI
constant GL.GL_COLOR_TABLE_INTENSITY_SIZE_SGI
constant GL.GL_COLOR_TABLE_LUMINANCE_SIZE_SGI
constant GL.GL_COLOR_TABLE_RED_SIZE_SGI
constant GL.GL_COLOR_TABLE_SCALE_SGI
constant GL.GL_COLOR_TABLE_SGI
constant GL.GL_COLOR_TABLE_WIDTH_SGI
constant GL.GL_COLOR_WRITEMASK
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_COMPILE
Used in glNewList and glEndList
constant GL.GL_COMPILE_AND_EXECUTE
Used in glNewList and glEndList
constant GL.GL_COMPRESSED_GEOM_ACCELERATED_SUNX
constant GL.GL_COMPRESSED_GEOM_VERSION_SUNX
constant GL.GL_CONSTANT_ALPHA_EXT
constant GL.GL_CONSTANT_ATTENUATION
Used in glGetLight and glLight
constant GL.GL_CONSTANT_BORDER_HP
constant GL.GL_CONSTANT_COLOR_EXT
constant GL.GL_CONVOLUTION_1D_EXT
constant GL.GL_CONVOLUTION_2D_EXT
constant GL.GL_CONVOLUTION_BORDER_COLOR_HP
constant GL.GL_CONVOLUTION_BORDER_MODE_EXT
constant GL.GL_CONVOLUTION_FILTER_BIAS_EXT
constant GL.GL_CONVOLUTION_FILTER_SCALE_EXT
constant GL.GL_CONVOLUTION_FORMAT_EXT
constant GL.GL_CONVOLUTION_HEIGHT_EXT
constant GL.GL_CONVOLUTION_WIDTH_EXT
constant GL.GL_COPY
Used in glGetIntegerv , glLogicOp , glGetBooleanv , glGetFloatv , glGetDoublev and glFeedbackBuffer
constant GL.GL_COPY_INVERTED
Used in glLogicOp
constant GL.GL_COPY_PIXEL_TOKEN
Used in glFeedbackBuffer
constant GL.GL_CUBIC_EXT
constant GL.GL_CULL_FACE
Used in glIsEnabled , glGetIntegerv , glCullFace , glDisable , glPopAttrib , glEnable , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glFrontFace
constant GL.GL_CULL_FACE_MODE
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_CURRENT_BIT
Used in glPopAttrib and glPushAttrib
constant GL.GL_CURRENT_COLOR
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glRasterPos
constant GL.GL_CURRENT_INDEX
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glRasterPos
constant GL.GL_CURRENT_NORMAL
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_CURRENT_RASTER_COLOR
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glRasterPos
constant GL.GL_CURRENT_RASTER_DISTANCE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glRasterPos
constant GL.GL_CURRENT_RASTER_INDEX
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glRasterPos
constant GL.GL_CURRENT_RASTER_POSITION
Used in glGetIntegerv , glDrawPixels , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glRasterPos
constant GL.GL_CURRENT_RASTER_POSITION_VALID
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glRasterPos
constant GL.GL_CURRENT_RASTER_TEXTURE_COORDS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glRasterPos
constant GL.GL_CURRENT_TEXTURE_COORDS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glRasterPos
constant GL.GL_CW
Used in glFrontFace
constant GL.GL_DECAL
Used in glTexEnv
constant GL.GL_DECR
Used in glStencilOp
constant GL.GL_DEPTH
Used in glIsEnabled , glGetIntegerv , glDrawPixels , glDisable , glPopAttrib , glEnable , glPixelTransfer , glGetBooleanv , glGetTexImage , glPushAttrib , glGetFloatv , glGetDoublev , glReadPixels , glTexImage2D , glCopyPixels , glDepthFunc , glTexImage1D and glClear
constant GL.GL_DEPTH_BIAS
Used in glGetIntegerv , glDrawPixels , glPopAttrib , glPixelTransfer , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev , glReadPixels and glCopyPixels
constant GL.GL_DEPTH_BITS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_DEPTH_BUFFER_BIT
Used in glPopAttrib , glPushAttrib and glClear
constant GL.GL_DEPTH_CLEAR_VALUE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_DEPTH_COMPONENT
Used in glDrawPixels , glGetTexImage , glReadPixels , glTexImage2D and glTexImage1D
constant GL.GL_DEPTH_FUNC
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_DEPTH_RANGE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_DEPTH_SCALE
Used in glGetIntegerv , glDrawPixels , glPopAttrib , glPixelTransfer , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev , glReadPixels and glCopyPixels
constant GL.GL_DEPTH_TEST
Used in glIsEnabled , glGetIntegerv , glDisable , glPopAttrib , glEnable , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glDepthFunc
constant GL.GL_DEPTH_WRITEMASK
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_DIFFUSE
Used in glColorMaterial , glGetLight , glMaterial , glLight and glGetMaterial
constant GL.GL_DITHER
Used in glIsEnabled , glGetIntegerv , glDisable , glPopAttrib , glEnable , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_DOMAIN
Used in glGetMap
constant GL.GL_DONT_CARE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glHint
constant GL.GL_DOUBLE
Used in glGetIntegerv , glVertexPointer , glColorPointer , glNormalPointer , glGetBooleanv , glGetFloatv , glGetDoublev , glTexCoordPointer and glIndexPointer
constant GL.GL_DOUBLEBUFFER
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_DRAW_BUFFER
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_DRAW_PIXEL_TOKEN
Used in glFeedbackBuffer
constant GL.GL_DST_ALPHA
Used in glBlendFunc
constant GL.GL_DST_COLOR
Used in glBlendFunc
constant GL.GL_EDGE_FLAG
Used in glIsEnabled , glGetIntegerv , glPopAttrib , glEnableClientState , glGetPointerv , glGetBooleanv , glPushAttrib , glGetFloatv , glEdgeFlagPointer , glGetDoublev and glDisableClientState
constant GL.GL_EDGE_FLAG_ARRAY
Used in glIsEnabled , glGetIntegerv , glEnableClientState , glGetPointerv , glGetBooleanv , glGetFloatv , glEdgeFlagPointer , glGetDoublev and glDisableClientState
constant GL.GL_EDGE_FLAG_ARRAY_POINTER
Used in glGetPointerv
constant GL.GL_EDGE_FLAG_ARRAY_STRIDE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_EMISSION
Used in glColorMaterial , glMaterial and glGetMaterial
constant GL.GL_ENABLE_BIT
Used in glPopAttrib and glPushAttrib
constant GL.GL_EQUAL
Used in glAlphaFunc , glDepthFunc and glStencilFunc
constant GL.GL_EQUIV
Used in glLogicOp
constant GL.GL_EVAL_BIT
Used in glPopAttrib and glPushAttrib
constant GL.GL_EXP
Used in glFog , glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_EXP2
Used in glFog
constant GL.GL_EXTENSIONS
Used in glGetString
constant GL.GL_EXT_abgr
constant GL.GL_EXT_blend_color
constant GL.GL_EXT_blend_minmax
constant GL.GL_EXT_blend_subtract
constant GL.GL_EXT_convolution
constant GL.GL_EXT_histogram
constant GL.GL_EXT_pixel_transform
constant GL.GL_EXT_rescale_normal
constant GL.GL_EXT_texture3D
constant GL.GL_EYE_LINEAR
Used in glGetTexGen and glTexGen
constant GL.GL_EYE_PLANE
Used in glGetTexGen and glTexGen
constant GL.GL_FALSE
Used in glIsEnabled , glDepthMask , glIsList , glAreTexturesResident , glGetIntegerv , glIsTexture , glDisable , glEdgeFlag , glEnable , glColorMask , glGetBooleanv , glGetFloatv , glGetDoublev and glEdgeFlagv
constant GL.GL_FASTEST
Used in glHint
constant GL.GL_FEEDBACK
Used in glRenderMode , glPassThrough , glGetPointerv and glFeedbackBuffer
constant GL.GL_FEEDBACK_BUFFER_POINTER
Used in glGetPointerv
constant GL.GL_FEEDBACK_BUFFER_SIZE
constant GL.GL_FEEDBACK_BUFFER_TYPE
constant GL.GL_FILL
Used in glGetIntegerv , glDisable , glEnable , glPolygonMode , glGetBooleanv , glGetFloatv , glGetDoublev and glEvalMesh
constant GL.GL_FLAT
Used in glShadeModel
constant GL.GL_FLOAT
Used in glGetIntegerv , glDrawPixels , glVertexPointer , glColorPointer , glTexSubImage2D , glNormalPointer , glGetBooleanv , glGetTexImage , glGetFloatv , glGetDoublev , glCallLists , glReadPixels , glTexImage2D , glTexCoordPointer , glIndexPointer , glTexSubImage1D and glTexImage1D
constant GL.GL_FOG
Used in glIsEnabled , glFog , glGetIntegerv , glDisable , glPopAttrib , glEnable , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glHint
constant GL.GL_FOG_BIT
Used in glPopAttrib and glPushAttrib
constant GL.GL_FOG_COLOR
Used in glFog , glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_FOG_DENSITY
Used in glFog , glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_FOG_END
Used in glFog , glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_FOG_HINT
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glHint
constant GL.GL_FOG_INDEX
Used in glFog , glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_FOG_MODE
Used in glFog , glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_FOG_START
Used in glFog , glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_FRONT
Used in glGetIntegerv , glColorMaterial , glCullFace , glPopAttrib , glPolygonMode , glGetBooleanv , glPushAttrib , glGetFloatv , glReadBuffer , glMaterial , glGetDoublev , glDrawBuffer and glGetMaterial
constant GL.GL_FRONT_AND_BACK
Used in glGetIntegerv , glColorMaterial , glCullFace , glPolygonMode , glGetBooleanv , glGetFloatv , glMaterial , glGetDoublev and glDrawBuffer
constant GL.GL_FRONT_FACE
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_FRONT_LEFT
Used in glReadBuffer and glDrawBuffer
constant GL.GL_FRONT_RIGHT
Used in glReadBuffer and glDrawBuffer
constant GL.GL_FUNC_ADD_EXT
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_FUNC_REVERSE_SUBTRACT_EXT
constant GL.GL_FUNC_SUBTRACT_EXT
constant GL.GL_GEQUAL
Used in glAlphaFunc , glDepthFunc and glStencilFunc
constant GL.GL_GREATER
Used in glAlphaFunc , glDepthFunc and glStencilFunc
constant GL.GL_GREEN
Used in glGetIntegerv , glDrawPixels , glTexSubImage2D , glPopAttrib , glPixelTransfer , glGetBooleanv , glGetTexImage , glPushAttrib , glGetFloatv , glGetDoublev , glReadPixels , glTexImage2D , glTexSubImage1D and glTexImage1D
constant GL.GL_GREEN_BIAS
Used in glGetIntegerv , glPopAttrib , glPixelTransfer , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_GREEN_BITS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_GREEN_SCALE
Used in glGetIntegerv , glPopAttrib , glPixelTransfer , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_HINT_BIT
Used in glPopAttrib and glPushAttrib
constant GL.GL_HISTOGRAM_ALPHA_SIZE_EXT
constant GL.GL_HISTOGRAM_BLUE_SIZE_EXT
constant GL.GL_HISTOGRAM_EXT
constant GL.GL_HISTOGRAM_FORMAT_EXT
constant GL.GL_HISTOGRAM_GREEN_SIZE_EXT
constant GL.GL_HISTOGRAM_LUMINANCE_SIZE_EXT
constant GL.GL_HISTOGRAM_RED_SIZE_EXT
constant GL.GL_HISTOGRAM_SINK_EXT
constant GL.GL_HISTOGRAM_WIDTH_EXT
constant GL.GL_HP_convolution_border_modes
constant GL.GL_HP_occlusion_test
constant GL.GL_IGNORE_BORDER_HP
constant GL.GL_INCR
Used in glStencilOp
constant GL.GL_INDEX_ARRAY
Used in glIsEnabled , glGetIntegerv , glEnableClientState , glGetPointerv , glGetBooleanv , glGetFloatv , glGetDoublev , glIndexPointer and glDisableClientState
constant GL.GL_INDEX_ARRAY_POINTER
Used in glGetPointerv
constant GL.GL_INDEX_ARRAY_STRIDE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_INDEX_ARRAY_TYPE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_INDEX_BITS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_INDEX_CLEAR_VALUE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_INDEX_LOGIC_OP
Used in glIsEnabled , glGetIntegerv , glDisable , glPopAttrib , glEnable , glLogicOp , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_INDEX_MODE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_INDEX_OFFSET
Used in glGetIntegerv , glDrawPixels , glPopAttrib , glPixelTransfer , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev , glReadPixels , glTexImage2D , glCopyPixels and glTexImage1D
constant GL.GL_INDEX_SHIFT
Used in glGetIntegerv , glDrawPixels , glPopAttrib , glPixelTransfer , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev , glReadPixels , glTexImage2D , glCopyPixels and glTexImage1D
constant GL.GL_INDEX_WRITEMASK
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_INT
Used in glTexEnv , glDrawPixels , glVertexPointer , glColorPointer , glCopyTexImage1D , glTexSubImage2D , glNormalPointer , glGetTexImage , glCallLists , glReadPixels , glCopyTexImage2D , glTexImage2D , glTexCoordPointer , glIndexPointer , glTexSubImage1D and glTexImage1D
constant GL.GL_INTENSITY
Used in glTexEnv , glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_INTENSITY12
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_INTENSITY16
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_INTENSITY4
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_INTENSITY8
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_INVALID_ENUM
Used in glMatrixMode , glPixelStore , glIsEnabled , glGetTexLevelParameter , glFog , glTexEnv , glMap1 , glRenderMode , glGetTexGen , glGetIntegerv , glEnd , glDrawElements , glDrawArrays , glCopyTexSubImage2D , glColorMaterial , glBindTexture , glGetClipPlane , glCullFace , glGetError , glClipPlane , glDrawPixels , glBlendFunc , glVertexPointer , glGetLight , glDisable , glMap2 , glColorPointer , glCopyTexImage1D , glGetPixelMap , glTexSubImage2D , glNormalPointer , glEnable , glEnableClientState , glGetPointerv , glPixelTransfer , glPolygonMode , glGetTexParameter , glLogicOp , glGetBooleanv , glGetTexImage , glPixelMap , glGetFloatv , glGetMap , glAccum , glReadBuffer , glMaterial , glEdgeFlagPointer , glGetDoublev , glCallLists , glInterleavedArrays , glAlphaFunc , glShadeModel , glNewList , glReadPixels , glCopyTexImage2D , glTexImage2D , glGetTexEnv , glFeedbackBuffer , glEndList , glBegin , glLight , glStencilOp , glTexCoordPointer , glCopyPixels , glDepthFunc , glLightModel , glIndexPointer , glGetString , glTexParameter , glDisableClientState , glTexSubImage1D , glDrawBuffer , glHint , glTexImage1D , glStencilFunc , glGetMaterial , glCopyTexSubImage1D , glFrontFace , glEvalMesh and glTexGen
constant GL.GL_INVALID_OPERATION
Used in glPolygonOffset , glPushMatrix , glMatrixMode , glLoadName , glPixelStore , glIsEnabled , glGetTexLevelParameter , glGenTextures , glFog , glTexEnv , glClearColor , glMap1 , glPrioritizeTextures , glDepthMask , glPushName , glRenderMode , glMultMatrix , glIsList , glFrustum , glDepthRange , glAreTexturesResident , glDeleteTextures , glGetTexGen , glGetIntegerv , glEnd , glIsTexture , glDrawElements , glGenLists , glBlendColorEXT , glViewport , glDrawArrays , glCopyTexSubImage2D , glColorMaterial , glBindTexture , glGetClipPlane , glFinish , glCullFace , glGetError , glStencilMask , glClipPlane , glDrawPixels , glBlendFunc , glSelectBuffer , glGetLight , glInitNames , glPassThrough , glDisable , glMap2 , glLineStipple , glCopyTexImage1D , glGetPixelMap , glTexSubImage2D , glPopAttrib , glEnable , glListBase , glColorMask , glPixelTransfer , glPolygonMode , glGetTexParameter , glPopName , glLogicOp , glIndexMask , glGetBooleanv , glGetTexImage , glPixelMap , glTranslate , glPushAttrib , glGetFloatv , glGetMap , glAccum , glReadBuffer , glGetDoublev , glClearDepth , glRasterPos , glAlphaFunc , glShadeModel , glNewList , glReadPixels , glCopyTexImage2D , glRect , glTexImage2D , glGetTexEnv , glClearIndex , glFeedbackBuffer , glRotate , glEndList , glBegin , glLight , glGetPolygonStipple , glStencilOp , glClearStencil , glBitmap , glScale , glCopyPixels , glFlush , glOrtho , glDepthFunc , glMapGrid , glLightModel , glGetString , glTexParameter , glScissor , glTexSubImage1D , glLoadIdentity , glPixelZoom , glDrawBuffer , glLineWidth , glHint , glTexImage1D , glStencilFunc , glGetMaterial , glClear , glCopyTexSubImage1D , glPopMatrix , glPointSize , glPolygonStipple , glFrontFace , glLoadMatrix , glEvalMesh , glTexGen , glClearAccum and glDeleteLists
constant GL.GL_INVALID_VALUE
Used in glPixelStore , glGetTexLevelParameter , glGenTextures , glFog , glMap1 , glPrioritizeTextures , glFrustum , glAreTexturesResident , glDeleteTextures , glDrawElements , glGenLists , glViewport , glDrawArrays , glCopyTexSubImage2D , glGetError , glDrawPixels , glVertexPointer , glSelectBuffer , glMap2 , glColorPointer , glCopyTexImage1D , glTexSubImage2D , glNormalPointer , glGetTexImage , glPixelMap , glMaterial , glCallLists , glInterleavedArrays , glNewList , glReadPixels , glCopyTexImage2D , glTexImage2D , glFeedbackBuffer , glEndList , glLight , glBitmap , glTexCoordPointer , glCopyPixels , glMapGrid , glIndexPointer , glScissor , glTexSubImage1D , glLineWidth , glTexImage1D , glClear , glCopyTexSubImage1D , glPointSize and glDeleteLists
constant GL.GL_INVERT
Used in glLogicOp and glStencilOp
constant GL.GL_KEEP
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glStencilOp
constant GL.GL_LARGE_SUNX
constant GL.GL_LEFT
Used in glReadBuffer and glDrawBuffer
constant GL.GL_LEQUAL
Used in glAlphaFunc , glDepthFunc and glStencilFunc
constant GL.GL_LESS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev , glAlphaFunc , glDepthFunc and glStencilFunc
constant GL.GL_LIGHT0
Used in glGetLight and glLight
constant GL.GL_LIGHT1
constant GL.GL_LIGHT2
constant GL.GL_LIGHT3
constant GL.GL_LIGHT4
constant GL.GL_LIGHT5
constant GL.GL_LIGHT6
constant GL.GL_LIGHT7
constant GL.GL_LIGHTING
Used in glIsEnabled , glGetIntegerv , glDisable , glPopAttrib , glEnable , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glLight
constant GL.GL_LIGHTING_BIT
Used in glPopAttrib and glPushAttrib
constant GL.GL_LIGHT_MODEL_AMBIENT
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glLightModel
constant GL.GL_LIGHT_MODEL_LOCAL_VIEWER
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glLightModel
constant GL.GL_LIGHT_MODEL_TWO_SIDE
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glLightModel
constant GL.GL_LINE
Used in glIsEnabled , glFog , glGetIntegerv , glEnd , glDrawElements , glDrawArrays , glGetLight , glDisable , glLineStipple , glEdgeFlag , glPopAttrib , glEnable , glPolygonMode , glGetTexParameter , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev , glFeedbackBuffer , glBegin , glLight , glTexParameter , glLineWidth , glHint , glEdgeFlagv and glEvalMesh
constant GL.GL_LINEAR
Used in glFog , glGetLight , glGetTexParameter , glLight and glTexParameter
constant GL.GL_LINEAR_ATTENUATION
Used in glGetLight and glLight
constant GL.GL_LINEAR_MIPMAP_LINEAR
Used in glTexParameter
constant GL.GL_LINEAR_MIPMAP_NEAREST
Used in glTexParameter
constant GL.GL_LINES
Used in glEnd , glDrawElements , glDrawArrays , glLineStipple , glBegin and glEvalMesh
constant GL.GL_LINE_BIT
Used in glPopAttrib and glPushAttrib
constant GL.GL_LINE_LOOP
Used in glEnd , glDrawElements , glDrawArrays and glBegin
constant GL.GL_LINE_RESET_TOKEN
Used in glFeedbackBuffer
constant GL.GL_LINE_SMOOTH
Used in glIsEnabled , glGetIntegerv , glDisable , glPopAttrib , glEnable , glPolygonMode , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev , glLineWidth and glHint
constant GL.GL_LINE_SMOOTH_HINT
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glHint
constant GL.GL_LINE_STIPPLE
Used in glIsEnabled , glGetIntegerv , glDisable , glLineStipple , glPopAttrib , glEnable , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_LINE_STIPPLE_PATTERN
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_LINE_STIPPLE_REPEAT
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_LINE_STRIP
Used in glEnd , glDrawElements , glDrawArrays , glBegin and glEvalMesh
constant GL.GL_LINE_TOKEN
Used in glFeedbackBuffer
constant GL.GL_LINE_WIDTH
Used in glGetIntegerv , glPolygonMode , glGetBooleanv , glGetFloatv , glGetDoublev and glLineWidth
constant GL.GL_LINE_WIDTH_GRANULARITY
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glLineWidth
constant GL.GL_LINE_WIDTH_RANGE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glLineWidth
constant GL.GL_LIST_BASE
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_LIST_BIT
Used in glPopAttrib and glPushAttrib
constant GL.GL_LIST_INDEX
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_LIST_MODE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_LOAD
Used in glAccum
constant GL.GL_LOGIC_OP
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_LOGIC_OP_MODE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_LUMINANCE
Used in glTexEnv , glDrawPixels , glCopyTexImage1D , glTexSubImage2D , glGetTexImage , glReadPixels , glCopyTexImage2D , glTexImage2D , glTexSubImage1D and glTexImage1D
constant GL.GL_LUMINANCE12
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_LUMINANCE12_ALPHA12
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_LUMINANCE12_ALPHA4
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_LUMINANCE16
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_LUMINANCE16_ALPHA16
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_LUMINANCE4
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_LUMINANCE4_ALPHA4
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_LUMINANCE6_ALPHA2
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_LUMINANCE8
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_LUMINANCE8_ALPHA8
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_LUMINANCE_ALPHA
Used in glDrawPixels , glCopyTexImage1D , glTexSubImage2D , glGetTexImage , glReadPixels , glCopyTexImage2D , glTexImage2D , glTexSubImage1D and glTexImage1D
constant GL.GL_MAP1_COLOR_4
Used in glIsEnabled , glMap1 , glGetIntegerv , glDisable , glEnable , glGetBooleanv , glGetFloatv , glGetMap , glGetDoublev and glEvalCoord
constant GL.GL_MAP1_GRID_DOMAIN
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_MAP1_GRID_SEGMENTS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_MAP1_INDEX
Used in glMap1 , glGetIntegerv , glDisable , glEnable , glGetBooleanv , glGetFloatv , glGetMap , glGetDoublev and glEvalCoord
constant GL.GL_MAP1_NORMAL
Used in glMap1 , glGetIntegerv , glDisable , glEnable , glGetBooleanv , glGetFloatv , glGetMap , glGetDoublev and glEvalCoord
constant GL.GL_MAP1_TEXTURE_COORD_1
Used in glMap1 , glGetIntegerv , glDisable , glEnable , glGetBooleanv , glGetFloatv , glGetMap , glGetDoublev and glEvalCoord
constant GL.GL_MAP1_TEXTURE_COORD_2
Used in glMap1 , glGetIntegerv , glDisable , glEnable , glGetBooleanv , glGetFloatv , glGetMap , glGetDoublev and glEvalCoord
constant GL.GL_MAP1_TEXTURE_COORD_3
Used in glMap1 , glGetIntegerv , glDisable , glEnable , glGetBooleanv , glGetFloatv , glGetMap , glGetDoublev and glEvalCoord
constant GL.GL_MAP1_TEXTURE_COORD_4
Used in glMap1 , glGetIntegerv , glDisable , glEnable , glGetBooleanv , glGetFloatv , glGetMap , glGetDoublev and glEvalCoord
constant GL.GL_MAP1_VERTEX_3
Used in glMap1 , glGetIntegerv , glDisable , glEnable , glGetBooleanv , glGetFloatv , glGetMap , glGetDoublev and glEvalCoord
constant GL.GL_MAP1_VERTEX_4
Used in glMap1 , glGetIntegerv , glDisable , glEnable , glGetBooleanv , glGetFloatv , glGetMap , glGetDoublev and glEvalCoord
constant GL.GL_MAP2_COLOR_4
Used in glGetIntegerv , glDisable , glMap2 , glEnable , glGetBooleanv , glGetFloatv , glGetMap , glGetDoublev and glEvalCoord
constant GL.GL_MAP2_GRID_DOMAIN
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_MAP2_GRID_SEGMENTS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_MAP2_INDEX
Used in glGetIntegerv , glDisable , glMap2 , glEnable , glGetBooleanv , glGetFloatv , glGetMap , glGetDoublev and glEvalCoord
constant GL.GL_MAP2_NORMAL
Used in glGetIntegerv , glDisable , glMap2 , glEnable , glGetBooleanv , glGetFloatv , glGetMap , glGetDoublev and glEvalCoord
constant GL.GL_MAP2_TEXTURE_COORD_1
Used in glGetIntegerv , glDisable , glMap2 , glEnable , glGetBooleanv , glGetFloatv , glGetMap , glGetDoublev and glEvalCoord
constant GL.GL_MAP2_TEXTURE_COORD_2
Used in glIsEnabled , glGetIntegerv , glDisable , glMap2 , glEnable , glGetBooleanv , glGetFloatv , glGetMap , glGetDoublev and glEvalCoord
constant GL.GL_MAP2_TEXTURE_COORD_3
Used in glIsEnabled , glGetIntegerv , glDisable , glMap2 , glEnable , glGetBooleanv , glGetFloatv , glGetMap , glGetDoublev and glEvalCoord
constant GL.GL_MAP2_TEXTURE_COORD_4
Used in glIsEnabled , glGetIntegerv , glDisable , glMap2 , glEnable , glGetBooleanv , glGetFloatv , glGetMap , glGetDoublev and glEvalCoord
constant GL.GL_MAP2_VERTEX_3
Used in glIsEnabled , glGetIntegerv , glDisable , glMap2 , glEnable , glGetBooleanv , glGetFloatv , glGetMap , glGetDoublev and glEvalCoord
constant GL.GL_MAP2_VERTEX_4
Used in glIsEnabled , glGetIntegerv , glDisable , glMap2 , glEnable , glGetBooleanv , glGetFloatv , glGetMap , glGetDoublev and glEvalCoord
constant GL.GL_MAP_COLOR
Used in glGetIntegerv , glDrawPixels , glPopAttrib , glPixelTransfer , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev , glReadPixels and glCopyPixels
constant GL.GL_MAP_STENCIL
Used in glGetIntegerv , glDrawPixels , glPopAttrib , glPixelTransfer , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev , glReadPixels and glCopyPixels
constant GL.GL_MATRIX_MODE
Used in glMatrixMode , glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_MAX_3D_TEXTURE_SIZE_EXT
constant GL.GL_MAX_ATTRIB_STACK_DEPTH
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_MAX_CLIENT_ATTRIB_STACK_DEPTH
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_MAX_CLIP_PLANES
Used in glGetIntegerv , glGetClipPlane , glClipPlane , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_MAX_CONVOLUTION_HEIGHT_EXT
constant GL.GL_MAX_CONVOLUTION_WIDTH_EXT
constant GL.GL_MAX_EVAL_ORDER
Used in glMap1 , glGetIntegerv , glMap2 , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_MAX_EXT
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_MAX_LIGHTS
Used in glGetIntegerv , glGetLight , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glLight
constant GL.GL_MAX_LIST_NESTING
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_MAX_MODELVIEW_STACK_DEPTH
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_MAX_NAME_STACK_DEPTH
Used in glPushName , glGetIntegerv , glPopName , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_MAX_PIXEL_MAP_TABLE
Used in glGetIntegerv , glGetBooleanv , glPixelMap , glGetFloatv and glGetDoublev
constant GL.GL_MAX_PIXEL_TRANSFORM_2D_STACK_DEPTH_EXT
constant GL.GL_MAX_PROJECTION_STACK_DEPTH
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_MAX_TEXTURE_SIZE
Used in glGetTexLevelParameter , glGetIntegerv , glCopyTexSubImage2D , glCopyTexImage1D , glTexSubImage2D , glGetBooleanv , glGetTexImage , glGetFloatv , glGetDoublev , glCopyTexImage2D , glTexImage2D , glTexSubImage1D , glTexImage1D and glCopyTexSubImage1D
constant GL.GL_MAX_TEXTURE_STACK_DEPTH
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_MAX_VIEWPORT_DIMS
Used in glGetIntegerv , glViewport , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_MINMAX_EXT
constant GL.GL_MINMAX_FORMAT_EXT
constant GL.GL_MINMAX_SINK_EXT
constant GL.GL_MIN_EXT
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_MODELVIEW
Used in glPushMatrix , glMatrixMode , glGetIntegerv , glGetBooleanv , glTranslate , glGetFloatv , glGetDoublev , glRotate , glScale and glPopMatrix
constant GL.GL_MODELVIEW_MATRIX
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_MODELVIEW_STACK_DEPTH
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_MODULATE
Used in glTexEnv and glGetTexEnv
constant GL.GL_MULT
Used in glAccum
constant GL.GL_N3F_V3F
Used in glInterleavedArrays
constant GL.GL_NAME_STACK_DEPTH
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_NAND
Used in glLogicOp
constant GL.GL_NEAREST
Used in glGetTexParameter and glTexParameter
constant GL.GL_NEAREST_MIPMAP_LINEAR
Used in glGetTexParameter and glTexParameter
constant GL.GL_NEAREST_MIPMAP_NEAREST
Used in glTexParameter
constant GL.GL_NEVER
Used in glAlphaFunc , glDepthFunc and glStencilFunc
constant GL.GL_NICEST
Used in glHint
constant GL.GL_NONE
Used in glDrawBuffer
constant GL.GL_NOOP
Used in glLogicOp
constant GL.GL_NOR
Used in glIsEnabled , glGetIntegerv , glDisable , glNormalPointer , glPopAttrib , glEnable , glEnableClientState , glGetPointerv , glLogicOp , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev , glNormal and glDisableClientState
constant GL.GL_NORMALIZE
Used in glIsEnabled , glGetIntegerv , glDisable , glPopAttrib , glEnable , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glNormal
constant GL.GL_NORMAL_ARRAY
Used in glIsEnabled , glGetIntegerv , glNormalPointer , glEnableClientState , glGetPointerv , glGetBooleanv , glGetFloatv , glGetDoublev and glDisableClientState
constant GL.GL_NORMAL_ARRAY_POINTER
Used in glGetPointerv
constant GL.GL_NORMAL_ARRAY_STRIDE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_NORMAL_ARRAY_TYPE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_NOTEQUAL
Used in glAlphaFunc , glDepthFunc and glStencilFunc
constant GL.GL_NO_ERROR
Used in glGetError
constant GL.GL_OBJECT_LINEAR
Used in glTexGen
constant GL.GL_OBJECT_PLANE
Used in glGetTexGen and glTexGen
constant GL.GL_OCCLUSION_RESULT_HP
constant GL.GL_OCCLUSION_TEST_HP
constant GL.GL_ONE
Used in glGetIntegerv , glBlendFunc , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_ONE_MINUS_CONSTANT_ALPHA_EXT
constant GL.GL_ONE_MINUS_CONSTANT_COLOR_EXT
constant GL.GL_ONE_MINUS_DST_ALPHA
Used in glBlendFunc
constant GL.GL_ONE_MINUS_DST_COLOR
Used in glBlendFunc
constant GL.GL_ONE_MINUS_SRC_ALPHA
Used in glBlendFunc
constant GL.GL_ONE_MINUS_SRC_COLOR
Used in glBlendFunc
constant GL.GL_OR
Used in glLogicOp and glGetMap
constant GL.GL_ORDER
Used in glGetMap
constant GL.GL_OR_INVERTED
Used in glLogicOp
constant GL.GL_OR_REVERSE
Used in glLogicOp
constant GL.GL_OUT_OF_MEMORY
Used in glGetError , glNewList and glEndList
constant GL.GL_PACK_ALIGNMENT
Used in glPixelStore , glGetIntegerv , glGetBooleanv , glGetTexImage , glGetFloatv and glGetDoublev
constant GL.GL_PACK_IMAGE_HEIGHT_EXT
constant GL.GL_PACK_LSB_FIRST
Used in glPixelStore , glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glReadPixels
constant GL.GL_PACK_ROW_LENGTH
Used in glPixelStore , glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_PACK_SKIP_IMAGES_EXT
constant GL.GL_PACK_SKIP_PIXELS
Used in glPixelStore , glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_PACK_SKIP_ROWS
Used in glPixelStore , glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_PACK_SWAP_BYTES
Used in glPixelStore , glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glReadPixels
constant GL.GL_PASS_THROUGH_TOKEN
Used in glPassThrough and glFeedbackBuffer
constant GL.GL_PERSPECTIVE_CORRECTION_HINT
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glHint
constant GL.GL_PIXEL_CUBIC_WEIGHT_EXT
constant GL.GL_PIXEL_MAG_FILTER_EXT
constant GL.GL_PIXEL_MAP_A_TO_A
Used in glGetIntegerv , glGetPixelMap , glPixelTransfer , glGetBooleanv , glPixelMap , glGetFloatv and glGetDoublev
constant GL.GL_PIXEL_MAP_A_TO_A_SIZE
Used in glGetIntegerv , glPixelTransfer , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_PIXEL_MAP_B_TO_B
Used in glGetIntegerv , glGetPixelMap , glPixelTransfer , glGetBooleanv , glPixelMap , glGetFloatv and glGetDoublev
constant GL.GL_PIXEL_MAP_B_TO_B_SIZE
Used in glGetIntegerv , glPixelTransfer , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_PIXEL_MAP_G_TO_G
Used in glGetIntegerv , glGetPixelMap , glPixelTransfer , glGetBooleanv , glPixelMap , glGetFloatv and glGetDoublev
constant GL.GL_PIXEL_MAP_G_TO_G_SIZE
Used in glGetIntegerv , glPixelTransfer , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_PIXEL_MAP_I_TO_A
Used in glGetIntegerv , glDrawPixels , glGetPixelMap , glPixelTransfer , glGetBooleanv , glPixelMap , glGetFloatv , glGetDoublev , glReadPixels , glTexImage2D and glTexImage1D
constant GL.GL_PIXEL_MAP_I_TO_A_SIZE
Used in glGetIntegerv , glPixelTransfer , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_PIXEL_MAP_I_TO_B
Used in glGetIntegerv , glDrawPixels , glGetPixelMap , glPixelTransfer , glGetBooleanv , glPixelMap , glGetFloatv , glGetDoublev , glReadPixels , glTexImage2D and glTexImage1D
constant GL.GL_PIXEL_MAP_I_TO_B_SIZE
Used in glGetIntegerv , glPixelTransfer , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_PIXEL_MAP_I_TO_G
Used in glGetIntegerv , glDrawPixels , glGetPixelMap , glPixelTransfer , glGetBooleanv , glPixelMap , glGetFloatv , glGetDoublev , glReadPixels , glTexImage2D and glTexImage1D
constant GL.GL_PIXEL_MAP_I_TO_G_SIZE
Used in glGetIntegerv , glPixelTransfer , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_PIXEL_MAP_I_TO_I
Used in glGetIntegerv , glDrawPixels , glGetPixelMap , glPixelTransfer , glGetBooleanv , glPixelMap , glGetFloatv , glGetDoublev , glReadPixels and glCopyPixels
constant GL.GL_PIXEL_MAP_I_TO_I_SIZE
Used in glGetIntegerv , glPixelTransfer , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_PIXEL_MAP_I_TO_R
Used in glGetIntegerv , glDrawPixels , glGetPixelMap , glPixelTransfer , glGetBooleanv , glPixelMap , glGetFloatv , glGetDoublev , glReadPixels , glTexImage2D and glTexImage1D
constant GL.GL_PIXEL_MAP_I_TO_R_SIZE
Used in glGetIntegerv , glPixelTransfer , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_PIXEL_MAP_R_TO_R
Used in glGetIntegerv , glGetPixelMap , glPixelTransfer , glGetBooleanv , glPixelMap , glGetFloatv and glGetDoublev
constant GL.GL_PIXEL_MAP_R_TO_R_SIZE
Used in glGetIntegerv , glPixelTransfer , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_PIXEL_MAP_S_TO_S
Used in glGetIntegerv , glDrawPixels , glGetPixelMap , glPixelTransfer , glGetBooleanv , glPixelMap , glGetFloatv , glGetDoublev , glReadPixels and glCopyPixels
constant GL.GL_PIXEL_MAP_S_TO_S_SIZE
Used in glGetIntegerv , glPixelTransfer , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_PIXEL_MIN_FILTER_EXT
constant GL.GL_PIXEL_MODE_BIT
Used in glPopAttrib and glPushAttrib
constant GL.GL_PIXEL_TRANSFORM_2D_EXT
constant GL.GL_PIXEL_TRANSFORM_2D_MATRIX_EXT
constant GL.GL_PIXEL_TRANSFORM_2D_STACK_DEPTH_EXT
constant GL.GL_PIXEL_TRANSFORM_COLOR_TABLE_EXT
constant GL.GL_POINT
Used in glIsEnabled , glGetIntegerv , glEnd , glDrawElements , glDrawArrays , glDisable , glEdgeFlag , glPopAttrib , glEnable , glPolygonMode , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev , glFeedbackBuffer , glBegin , glHint , glEdgeFlagv , glPointSize and glEvalMesh
constant GL.GL_POINTS
Used in glEnd , glDrawElements , glDrawArrays , glBegin and glEvalMesh
constant GL.GL_POINT_BIT
Used in glPopAttrib and glPushAttrib
constant GL.GL_POINT_SIZE
Used in glGetIntegerv , glPolygonMode , glGetBooleanv , glGetFloatv , glGetDoublev and glPointSize
constant GL.GL_POINT_SIZE_GRANULARITY
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glPointSize
constant GL.GL_POINT_SIZE_RANGE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glPointSize
constant GL.GL_POINT_SMOOTH
Used in glIsEnabled , glGetIntegerv , glDisable , glPopAttrib , glEnable , glPolygonMode , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev , glHint and glPointSize
constant GL.GL_POINT_SMOOTH_HINT
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glHint
constant GL.GL_POINT_TOKEN
Used in glFeedbackBuffer
constant GL.GL_POLYGON
Used in glPolygonOffset , glIsEnabled , glGetIntegerv , glEnd , glDrawElements , glDrawArrays , glDisable , glEdgeFlag , glPopAttrib , glEnable , glPolygonMode , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev , glRect , glFeedbackBuffer , glBegin , glHint , glEdgeFlagv and glPolygonStipple
constant GL.GL_POLYGON_BIT
Used in glPopAttrib and glPushAttrib
constant GL.GL_POLYGON_MODE
Used in glGetIntegerv , glEdgeFlag , glPopAttrib , glPolygonMode , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glEdgeFlagv
constant GL.GL_POLYGON_OFFSET_FACTOR
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_POLYGON_OFFSET_FILL
Used in glIsEnabled , glGetIntegerv , glDisable , glPopAttrib , glEnable , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_POLYGON_OFFSET_LINE
Used in glIsEnabled , glGetIntegerv , glDisable , glPopAttrib , glEnable , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_POLYGON_OFFSET_POINT
Used in glIsEnabled , glGetIntegerv , glDisable , glPopAttrib , glEnable , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_POLYGON_OFFSET_UNITS
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_POLYGON_SMOOTH
Used in glIsEnabled , glGetIntegerv , glDisable , glPopAttrib , glEnable , glPolygonMode , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glHint
constant GL.GL_POLYGON_SMOOTH_HINT
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glHint
constant GL.GL_POLYGON_STIPPLE
Used in glIsEnabled , glGetIntegerv , glDisable , glPopAttrib , glEnable , glPolygonMode , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glPolygonStipple
constant GL.GL_POLYGON_STIPPLE_BIT
Used in glPopAttrib and glPushAttrib
constant GL.GL_POLYGON_TOKEN
Used in glFeedbackBuffer
constant GL.GL_POSITION
Used in glGetLight and glLight
constant GL.GL_POST_CONVOLUTION_ALPHA_BIAS_EXT
constant GL.GL_POST_CONVOLUTION_ALPHA_SCALE_EXT
constant GL.GL_POST_CONVOLUTION_BLUE_BIAS_EXT
constant GL.GL_POST_CONVOLUTION_BLUE_SCALE_EXT
constant GL.GL_POST_CONVOLUTION_COLOR_TABLE_SGI
constant GL.GL_POST_CONVOLUTION_GREEN_BIAS_EXT
constant GL.GL_POST_CONVOLUTION_GREEN_SCALE_EXT
constant GL.GL_POST_CONVOLUTION_RED_BIAS_EXT
constant GL.GL_POST_CONVOLUTION_RED_SCALE_EXT
constant GL.GL_PROJECTION
Used in glPushMatrix , glMatrixMode , glFrustum , glGetIntegerv , glGetBooleanv , glTranslate , glGetFloatv , glGetDoublev , glRotate , glScale , glOrtho and glPopMatrix
constant GL.GL_PROJECTION_MATRIX
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_PROJECTION_STACK_DEPTH
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_PROXY_COLOR_TABLE_SGI
constant GL.GL_PROXY_HISTOGRAM_EXT
constant GL.GL_PROXY_PIXEL_TRANSFORM_COLOR_TABLE_EXT
constant GL.GL_PROXY_POST_CONVOLUTION_COLOR_TABLE_SGI
constant GL.GL_PROXY_TEXTURE_1D
Used in glGetTexLevelParameter , glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev , glNewList , glEndList and glTexImage1D
constant GL.GL_PROXY_TEXTURE_2D
Used in glGetTexLevelParameter , glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev , glNewList , glTexImage2D and glEndList
constant GL.GL_PROXY_TEXTURE_3D_EXT
constant GL.GL_PROXY_TEXTURE_COLOR_TABLE_SGI
constant GL.GL_Q
Used in glGetTexGen , glEnd , glDrawElements , glDrawArrays , glGetLight , glBegin , glLight , glEvalMesh and glTexGen
constant GL.GL_QUADRATIC_ATTENUATION
Used in glGetLight and glLight
constant GL.GL_QUADS
Used in glEnd , glDrawElements , glDrawArrays and glBegin
constant GL.GL_QUAD_STRIP
Used in glEnd , glDrawElements , glDrawArrays , glBegin and glEvalMesh
constant GL.GL_R
Used in glPixelStore , glTexEnv , glRenderMode , glGetTexGen , glGetIntegerv , glCopyTexSubImage2D , glDrawPixels , glCopyTexImage1D , glTexSubImage2D , glPopAttrib , glPixelTransfer , glGetTexParameter , glGetBooleanv , glGetTexImage , glPushAttrib , glGetFloatv , glAccum , glReadBuffer , glGetDoublev , glReadPixels , glCopyTexImage2D , glTexImage2D , glStencilOp , glGetString , glTexParameter , glTexSubImage1D , glDrawBuffer , glTexImage1D , glCopyTexSubImage1D and glTexGen
constant GL.GL_R3_G3_B2
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_READ_BUFFER
Used in glGetIntegerv , glCopyTexSubImage2D , glCopyTexImage1D , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev , glCopyTexImage2D and glCopyTexSubImage1D
constant GL.GL_RED
Used in glGetIntegerv , glDrawPixels , glTexSubImage2D , glPopAttrib , glPixelTransfer , glGetBooleanv , glGetTexImage , glPushAttrib , glGetFloatv , glGetDoublev , glReadPixels , glTexImage2D , glTexSubImage1D and glTexImage1D
constant GL.GL_REDUCE_EXT
constant GL.GL_RED_BIAS
Used in glGetIntegerv , glPopAttrib , glPixelTransfer , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_RED_BITS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_RED_SCALE
Used in glGetIntegerv , glPopAttrib , glPixelTransfer , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_RENDER
Used in glRenderMode , glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glGetString
constant GL.GL_RENDERER
Used in glGetString
constant GL.GL_RENDER_MODE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_REPEAT
Used in glGetTexParameter and glTexParameter
constant GL.GL_REPLACE
Used in glTexEnv and glStencilOp
constant GL.GL_REPLICATE_BORDER_HP
constant GL.GL_RESCALE_NORMAL_EXT
constant GL.GL_RETURN
Used in glAccum
constant GL.GL_RGB
Used in glPixelStore , glTexEnv , glGetIntegerv , glDrawPixels , glCopyTexImage1D , glTexSubImage2D , glGetBooleanv , glGetTexImage , glGetFloatv , glGetDoublev , glReadPixels , glCopyTexImage2D , glTexImage2D , glTexSubImage1D and glTexImage1D
constant GL.GL_RGB10
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_RGB10_A2
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_RGB12
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_RGB16
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_RGB4
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_RGB5
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_RGB5_A1
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_RGB8
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_RGBA
Used in glTexEnv , glGetIntegerv , glDrawPixels , glCopyTexImage1D , glTexSubImage2D , glGetBooleanv , glGetTexImage , glGetFloatv , glGetDoublev , glReadPixels , glCopyTexImage2D , glTexImage2D , glTexSubImage1D and glTexImage1D
constant GL.GL_RGBA12
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_RGBA16
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_RGBA2
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_RGBA4
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_RGBA8
Used in glCopyTexImage1D , glCopyTexImage2D , glTexImage2D and glTexImage1D
constant GL.GL_RGBA_MODE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_RIGHT
Used in glReadBuffer and glDrawBuffer
constant GL.GL_S
Used in glPushMatrix , glLoadName , glIsEnabled , glPushName , glRenderMode , glGetTexGen , glGetIntegerv , glColorMaterial , glGetError , glDrawPixels , glBlendFunc , glVertexPointer , glSelectBuffer , glGetLight , glInitNames , glDisable , glColorPointer , glTexSubImage2D , glNormalPointer , glPopAttrib , glEnable , glGetPointerv , glPopName , glLogicOp , glGetBooleanv , glGetTexImage , glPushAttrib , glGetFloatv , glMaterial , glGetDoublev , glCallLists , glShadeModel , glReadPixels , glTexImage2D , glLight , glPopClientAttrib , glStencilOp , glTexCoordPointer , glCopyPixels , glIndexPointer , glPushClientAttrib , glScissor , glTexSubImage1D , glTexImage1D , glStencilFunc , glGetMaterial , glClear , glPopMatrix and glTexGen
constant GL.GL_SCISSOR_BIT
Used in glPopAttrib and glPushAttrib
constant GL.GL_SCISSOR_BOX
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_SCISSOR_TEST
Used in glIsEnabled , glGetIntegerv , glDisable , glPopAttrib , glEnable , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glScissor
constant GL.GL_SELECT
Used in glLoadName , glPushName , glRenderMode , glSelectBuffer , glInitNames , glGetPointerv and glPopName
constant GL.GL_SELECTION_BUFFER_POINTER
Used in glGetPointerv
constant GL.GL_SELECTION_BUFFER_SIZE
constant GL.GL_SEPARABLE_2D_EXT
constant GL.GL_SET
Used in glLogicOp
constant GL.GL_SGI_color_table
constant GL.GL_SGI_texture_color_table
constant GL.GL_SHADE_MODEL
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_SHININESS
Used in glMaterial and glGetMaterial
constant GL.GL_SHORT
Used in glDrawPixels , glVertexPointer , glColorPointer , glTexSubImage2D , glNormalPointer , glGetTexImage , glCallLists , glReadPixels , glTexImage2D , glTexCoordPointer , glIndexPointer , glTexSubImage1D and glTexImage1D
constant GL.GL_SMOOTH
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glShadeModel
constant GL.GL_SPECULAR
Used in glColorMaterial , glGetLight , glMaterial , glLight and glGetMaterial
constant GL.GL_SPHERE_MAP
Used in glTexGen
constant GL.GL_SPOT_CUTOFF
Used in glGetLight and glLight
constant GL.GL_SPOT_DIRECTION
Used in glGetLight and glLight
constant GL.GL_SPOT_EXPONENT
Used in glGetLight and glLight
constant GL.GL_SRC_ALPHA
Used in glBlendFunc
constant GL.GL_SRC_ALPHA_SATURATE
Used in glBlendFunc
constant GL.GL_SRC_COLOR
Used in glBlendFunc
constant GL.GL_STACK_OVERFLOW
Used in glPushMatrix , glPushName , glGetError , glPopAttrib , glPopName , glPushAttrib , glPopClientAttrib , glPushClientAttrib and glPopMatrix
constant GL.GL_STACK_UNDERFLOW
Used in glPushMatrix , glPushName , glGetError , glPopAttrib , glPopName , glPushAttrib , glPopClientAttrib , glPushClientAttrib and glPopMatrix
constant GL.GL_STENCIL
Used in glIsEnabled , glGetIntegerv , glDrawPixels , glDisable , glPopAttrib , glEnable , glGetBooleanv , glGetTexImage , glPushAttrib , glGetFloatv , glGetDoublev , glReadPixels , glTexImage2D , glStencilOp , glCopyPixels , glTexImage1D , glStencilFunc and glClear
constant GL.GL_STENCIL_BITS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glStencilOp
constant GL.GL_STENCIL_BUFFER_BIT
Used in glPopAttrib , glPushAttrib and glClear
constant GL.GL_STENCIL_CLEAR_VALUE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_STENCIL_FAIL
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_STENCIL_FUNC
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_STENCIL_INDEX
Used in glDrawPixels , glGetTexImage , glReadPixels , glTexImage2D and glTexImage1D
constant GL.GL_STENCIL_PASS_DEPTH_FAIL
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_STENCIL_PASS_DEPTH_PASS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_STENCIL_REF
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_STENCIL_TEST
Used in glIsEnabled , glGetIntegerv , glDisable , glPopAttrib , glEnable , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev , glStencilOp and glStencilFunc
constant GL.GL_STENCIL_VALUE_MASK
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_STENCIL_WRITEMASK
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_STEREO
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_SUBPIXEL_BITS
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_SUNX_geometry_compression
constant GL.GL_SUNX_surface_hint
constant GL.GL_SUN_convolution_border_modes
constant GL.GL_SUN_multi_draw_arrays
constant GL.GL_SURFACE_SIZE_HINT_SUNX
constant GL.GL_T
Used in glPushMatrix , glMatrixMode , glIsEnabled , glGetTexLevelParameter , glTexEnv , glIsList , glAreTexturesResident , glGetTexGen , glGetIntegerv , glEnd , glIsTexture , glDrawElements , glDrawArrays , glCopyTexSubImage2D , glBindTexture , glDisable , glCopyTexImage1D , glTexSubImage2D , glEdgeFlag , glPopAttrib , glEnable , glColorMask , glEnableClientState , glGetPointerv , glGetTexParameter , glGetBooleanv , glGetTexImage , glPushAttrib , glGetFloatv , glGetDoublev , glInterleavedArrays , glReadPixels , glCopyTexImage2D , glTexImage2D , glGetTexEnv , glBegin , glTexCoordPointer , glTexParameter , glDisableClientState , glTexSubImage1D , glEdgeFlagv , glTexImage1D , glCopyTexSubImage1D , glPopMatrix and glTexGen
constant GL.GL_T2F_C3F_V3F
Used in glInterleavedArrays
constant GL.GL_T2F_C4F_N3F_V3F
Used in glInterleavedArrays
constant GL.GL_T2F_C4UB_V3F
Used in glInterleavedArrays
constant GL.GL_T2F_N3F_V3F
Used in glInterleavedArrays
constant GL.GL_T2F_V3F
Used in glInterleavedArrays
constant GL.GL_T4F_C4F_N3F_V4F
Used in glInterleavedArrays
constant GL.GL_T4F_V4F
Used in glInterleavedArrays
constant GL.GL_TABLE_TOO_LARGE_EXT
constant GL.GL_TEXTURE
Used in glPushMatrix , glMatrixMode , glIsEnabled , glGetTexLevelParameter , glTexEnv , glAreTexturesResident , glGetTexGen , glGetIntegerv , glCopyTexSubImage2D , glBindTexture , glDisable , glCopyTexImage1D , glTexSubImage2D , glPopAttrib , glEnable , glEnableClientState , glGetPointerv , glGetTexParameter , glGetBooleanv , glGetTexImage , glPushAttrib , glGetFloatv , glGetDoublev , glCopyTexImage2D , glTexImage2D , glGetTexEnv , glTexCoordPointer , glTexParameter , glDisableClientState , glTexSubImage1D , glTexImage1D , glCopyTexSubImage1D , glPopMatrix and glTexGen
constant GL.GL_TEXTURE_1D
Used in glIsEnabled , glGetTexLevelParameter , glGetIntegerv , glBindTexture , glDisable , glCopyTexImage1D , glPopAttrib , glEnable , glGetTexParameter , glGetBooleanv , glGetTexImage , glPushAttrib , glGetFloatv , glGetDoublev , glTexParameter , glTexSubImage1D , glTexImage1D and glCopyTexSubImage1D
constant GL.GL_TEXTURE_2D
Used in glIsEnabled , glGetTexLevelParameter , glGetIntegerv , glCopyTexSubImage2D , glBindTexture , glDisable , glTexSubImage2D , glPopAttrib , glEnable , glGetTexParameter , glGetBooleanv , glGetTexImage , glPushAttrib , glGetFloatv , glGetDoublev , glCopyTexImage2D , glTexImage2D and glTexParameter
constant GL.GL_TEXTURE_3D_EXT
constant GL.GL_TEXTURE_ALPHA_SIZE
Used in glGetTexLevelParameter
constant GL.GL_TEXTURE_BINDING_1D
constant GL.GL_TEXTURE_BINDING_2D
constant GL.GL_TEXTURE_BIT
Used in glPopAttrib and glPushAttrib
constant GL.GL_TEXTURE_BLUE_SIZE
Used in glGetTexLevelParameter
constant GL.GL_TEXTURE_BORDER
Used in glGetTexLevelParameter , glCopyTexSubImage2D , glGetTexParameter , glTexParameter , glTexSubImage1D and glCopyTexSubImage1D
constant GL.GL_TEXTURE_BORDER_COLOR
Used in glGetTexParameter and glTexParameter
constant GL.GL_TEXTURE_COLOR_TABLE_SGI
constant GL.GL_TEXTURE_COMPONENTS
constant GL.GL_TEXTURE_COORD_ARRAY
Used in glIsEnabled , glGetIntegerv , glEnableClientState , glGetPointerv , glGetBooleanv , glGetFloatv , glGetDoublev , glTexCoordPointer and glDisableClientState
constant GL.GL_TEXTURE_COORD_ARRAY_POINTER
Used in glGetPointerv
constant GL.GL_TEXTURE_COORD_ARRAY_SIZE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_TEXTURE_COORD_ARRAY_STRIDE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_TEXTURE_COORD_ARRAY_TYPE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_TEXTURE_DEPTH_EXT
constant GL.GL_TEXTURE_ENV
Used in glTexEnv and glGetTexEnv
constant GL.GL_TEXTURE_ENV_COLOR
Used in glTexEnv and glGetTexEnv
constant GL.GL_TEXTURE_ENV_MODE
Used in glTexEnv and glGetTexEnv
constant GL.GL_TEXTURE_GEN_MODE
Used in glGetTexGen , glPopAttrib , glPushAttrib and glTexGen
constant GL.GL_TEXTURE_GEN_Q
Used in glIsEnabled , glGetIntegerv , glDisable , glEnable , glGetBooleanv , glGetFloatv , glGetDoublev and glTexGen
constant GL.GL_TEXTURE_GEN_R
Used in glIsEnabled , glGetIntegerv , glDisable , glEnable , glGetBooleanv , glGetFloatv , glGetDoublev and glTexGen
constant GL.GL_TEXTURE_GEN_S
Used in glIsEnabled , glGetIntegerv , glDisable , glEnable , glGetBooleanv , glGetFloatv , glGetDoublev and glTexGen
constant GL.GL_TEXTURE_GEN_T
Used in glIsEnabled , glGetIntegerv , glDisable , glEnable , glGetBooleanv , glGetFloatv , glGetDoublev and glTexGen
constant GL.GL_TEXTURE_GREEN_SIZE
Used in glGetTexLevelParameter
constant GL.GL_TEXTURE_HEIGHT
Used in glGetTexLevelParameter , glCopyTexSubImage2D and glTexSubImage2D
constant GL.GL_TEXTURE_INTENSITY_SIZE
Used in glGetTexLevelParameter
constant GL.GL_TEXTURE_INTERNAL_FORMAT
Used in glGetTexLevelParameter
constant GL.GL_TEXTURE_LUMINANCE_SIZE
Used in glGetTexLevelParameter
constant GL.GL_TEXTURE_MAG_FILTER
Used in glGetTexParameter and glTexParameter
constant GL.GL_TEXTURE_MATRIX
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_TEXTURE_MIN_FILTER
Used in glGetTexParameter and glTexParameter
constant GL.GL_TEXTURE_PRIORITY
Used in glGetTexParameter and glTexParameter
constant GL.GL_TEXTURE_RED_SIZE
Used in glGetTexLevelParameter
constant GL.GL_TEXTURE_RESIDENT
Used in glAreTexturesResident and glGetTexParameter
constant GL.GL_TEXTURE_STACK_DEPTH
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_TEXTURE_WIDTH
Used in glGetTexLevelParameter , glCopyTexSubImage2D , glTexSubImage2D , glTexSubImage1D and glCopyTexSubImage1D
constant GL.GL_TEXTURE_WRAP_R_EXT
constant GL.GL_TEXTURE_WRAP_S
Used in glGetTexParameter and glTexParameter
constant GL.GL_TEXTURE_WRAP_T
Used in glGetTexParameter and glTexParameter
constant GL.GL_TRANSFORM_BIT
Used in glPopAttrib and glPushAttrib
constant GL.GL_TRIANGLES
Used in glEnd , glDrawElements , glDrawArrays and glBegin
constant GL.GL_TRIANGLE_FAN
Used in glEnd , glDrawElements , glDrawArrays and glBegin
constant GL.GL_TRIANGLE_STRIP
Used in glEnd , glDrawElements , glDrawArrays and glBegin
constant GL.GL_TRUE
Used in glIsEnabled , glIsList , glAreTexturesResident , glGetIntegerv , glIsTexture , glDisable , glEdgeFlag , glEnable , glColorMask , glGetTexParameter , glGetBooleanv , glGetFloatv , glGetDoublev , glReadPixels and glEdgeFlagv
constant GL.GL_UNPACK_ALIGNMENT
Used in glPixelStore , glGetIntegerv , glDrawPixels , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_UNPACK_IMAGE_HEIGHT_EXT
constant GL.GL_UNPACK_LSB_FIRST
Used in glPixelStore , glGetIntegerv , glDrawPixels , glGetBooleanv , glGetFloatv , glGetDoublev , glTexImage2D , glTexImage1D and glPolygonStipple
constant GL.GL_UNPACK_ROW_LENGTH
Used in glPixelStore , glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_UNPACK_SKIP_IMAGES_EXT
constant GL.GL_UNPACK_SKIP_PIXELS
Used in glPixelStore , glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_UNPACK_SKIP_ROWS
Used in glPixelStore , glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_UNPACK_SWAP_BYTES
Used in glPixelStore , glGetIntegerv , glGetBooleanv , glGetFloatv , glGetDoublev and glPolygonStipple
constant GL.GL_UNSIGNED_BYTE
Used in glDrawElements , glDrawPixels , glColorPointer , glTexSubImage2D , glGetTexImage , glCallLists , glReadPixels , glTexImage2D , glIndexPointer , glTexSubImage1D and glTexImage1D
constant GL.GL_UNSIGNED_INT
Used in glDrawElements , glDrawPixels , glColorPointer , glTexSubImage2D , glGetTexImage , glCallLists , glReadPixels , glTexImage2D , glTexSubImage1D and glTexImage1D
constant GL.GL_UNSIGNED_INT_8_8_8_8
constant GL.GL_UNSIGNED_INT_8_8_8_8_REV
constant GL.GL_UNSIGNED_SHORT
Used in glDrawElements , glDrawPixels , glColorPointer , glTexSubImage2D , glGetTexImage , glCallLists , glReadPixels , glTexImage2D , glTexSubImage1D and glTexImage1D
constant GL.GL_V2F
Used in glInterleavedArrays
constant GL.GL_V3F
Used in glInterleavedArrays
constant GL.GL_VENDOR
Used in glGetString
constant GL.GL_VERSION
Used in glGetString
constant GL.GL_VERSION_1_1
constant GL.GL_VERTEX_ARRAY
Used in glIsEnabled , glArrayElement , glGetIntegerv , glDrawElements , glDrawArrays , glVertexPointer , glEnableClientState , glGetPointerv , glGetBooleanv , glGetFloatv , glGetDoublev and glDisableClientState
constant GL.GL_VERTEX_ARRAY_POINTER
Used in glGetPointerv
constant GL.GL_VERTEX_ARRAY_SIZE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_VERTEX_ARRAY_STRIDE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_VERTEX_ARRAY_TYPE
Used in glGetIntegerv , glGetBooleanv , glGetFloatv and glGetDoublev
constant GL.GL_VIEWPORT
Used in glGetIntegerv , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv and glGetDoublev
constant GL.GL_VIEWPORT_BIT
Used in glPopAttrib and glPushAttrib
constant GL.GL_WRAP_BORDER_SUN
constant GL.GL_XOR
Used in glLogicOp
constant GL.GL_ZERO
Used in glGetIntegerv , glBlendFunc , glGetBooleanv , glGetFloatv , glGetDoublev and glStencilOp
constant GL.GL_ZOOM_X
Used in glGetIntegerv , glDrawPixels , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glCopyPixels
constant GL.GL_ZOOM_Y
Used in glGetIntegerv , glDrawPixels , glPopAttrib , glGetBooleanv , glPushAttrib , glGetFloatv , glGetDoublev and glCopyPixels
Module GLU |
The GL Utilities module is a partial implementation of the GLU library. This module only contains functions that someone at some point actually needed to get his work done. If you need a GLU function that isn't in here, copy the C code from the GLU library (Mesa was used last time), tweak it so that it compiles as Pike code and then check it in into the CVS.
void GLU.gluLookAt(float eyex, float eyey, float eyez, float centerx, float centery, float centerz, float upx, float upy, float upz)
void GLU.gluLookAt(Math.Matrix eye, Math.Matrix center, Math.Matrix up)
gluLookAt creates a viewing matrix derived from an eye point, a reference point indicating the center of the scene, and an up vector. The matrix maps the reference point to the negative z axis and the eye point to the origin, so that, when a typical projection matrix is used, the center of the scene maps to the center of the viewport. Similarly, the direction described by the up vector projected onto the viewing plane is mapped to the positive y axis so that it points upward in the viewport. The up vector must not be parallel to the line of sight from the eye to the reference point.
The matrix generated by gluLookAt postmultiplies the current matrix.
The relation between the matrix objects and the float values are
Math.Matrix eye = Math.Matrix( ({ eyex, eyey, eyez }) );
GL.glFrustum , gluPerspective
void GLU.gluOrtho2D(float left, float right, float bottom, float top)
gluOrtho2D sets up a two-dimensional orthographic viewing region. This is equivalent to calling
glOrtho(left, right, bottom, top, -1.0, 1.0);
The GLU manual says glOrtho(a,b,c,d, 0, 1)
.
GL.glOrtho , gluPerspective
void GLU.gluPerspective(float fovy, float aspect, float zNear, float zFar)
gluPerspective specifies a viewing frustum into the world coordinate system. In general, the aspect ratio in gluPerspective should match the aspect ratio of the associated viewport. For example, aspect = 2.0 means the viewer's angle of view is twice as wide in x as it is in y. If the viewport is twice as wide as it is tall, it displays the image without distortion.
The matrix generated by gluPerspective is multipled by the current matrix, just as if GL.glMultMatrix were called with the generated matrix. To load the perspective matrix onto the current matrix stack instead, precede the call to gluPerspective with a call to GL.glLoadIdentity .
void GLU.gluPickMatrix(float x, float y, float width, float height, array(int) viewport)
gluPickMatrix creates a projection matrix that can be used to restrict drawing to a small region of the viewport. This is typically useful to determine what objects are being drawn near the cursor. Use gluPickMatrix to restrict drawing to a small region around the cursor. Then, enter selection mode (with GL.glRenderMode and rerender the scene. All primitives that would have been drawn near the cursor are identified and stored in the selection buffer.
The matrix created by gluPickMatrix is multiplied by the current matrix just as if GL.glMultMatrix is called with the generated matrix. To effectively use the generated pick matrix for picking, first call GL.glLoadIdentity to load an identity matrix onto the perspective matrix stack. Then call gluPickMatrix, and finally, call a command (such as gluPerspective ) to multiply the perspective matrix by the pick matrix.
When using gluPickMatrix to pick NURBS, be careful to turn off the NURBS property GLU_AUTO_LOAD_MATRIX. If GLU_AUTO_LOAD_MATRIX is not turned off, then any NURBS surface rendered is subdivided differently with the pick matrix than the way it was subdivided without the pick matrix.
The viewport is an array with four integers.
Does the NURB remark apply?
GL.glGet , gluLoadIdentity , gluMultMatrix , gluRenderMode , gluPerspective
array(float) GLU.gluProject(float objx, float objy, float objz, array(float) model, array(float) proj, array(int) viewport)
gluProject transforms the specified object coordinates into window coordinates using model , proj , and viewport . The result is returned in a three valued array.