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IpeBezier Class Reference
[Ipe Geometry]

A cubic Bezier spline. More...

List of all members.

Public Methods

Static Public Methods


Detailed Description

A cubic Bezier spline.


Constructor & Destructor Documentation

IpeBezier::IpeBezier   [inline]
 

Default constructor, uninitialized curve.

IpeBezier::IpeBezier const IpeVector   p0,
const IpeVector   p1,
const IpeVector   p2,
const IpeVector   p3
[inline]
 

Constructor with four control points.


Member Function Documentation

IpeVector IpeBezier::Point double    t const
 

Return point on curve with parameter t (from 0.0 to 1.0).

double IpeBezier::Distance const IpeVector   v,
double    bound
 

Return distance to Bezier spline.

But may just return bound if actual distance is larger.

bool IpeBezier::Straight double    precision const
 

Returns true if the Bezier curve is nearly identical to the line segment iV[0]..iV[3].

void IpeBezier::Subdivide IpeBezier &    l,
IpeBezier &    r
const
 

Subdivide this Bezier curve in the middle.

void IpeBezier::Approximate double    precision,
std::vector< IpeVector > &    result
const
 

Approximate by a polygonal chain.

result must be empty when calling this.

IpeRect IpeBezier::BBox  
 

Return a tight bounding box (accurate to within 0.5).

IpeBezier IpeBezier::QuadBezier const IpeVector   p0,
const IpeVector   p1,
const IpeVector   p2
[static]
 

Convert a quadratic Bezier-spline to a cubic one.

The quadratic Bezier-spline with control points p0, p1, p2 is identical to the cubic Bezier-spline with control points q0 = p0, q1 = (2p1 + p0)/3, q2 = (2p1 + p2)/3, q3 = p2.

void IpeBezier::Spline int    n,
const IpeVector   v,
std::vector< IpeBezier > &    result
[static]
 

Convert a uniform cubic B-spline to a series of Bezier splines.

First and last control point are given multiplicity 3. Bezier splines are appended to result.

void IpeBezier::ClosedSpline int    n,
const IpeVector   v,
std::vector< IpeBezier > &    result
[static]
 

Convert a closed uniform cubic B-spline to a series of Bezier splines.

Bezier splines are appended to result.


The documentation for this class was generated from the following files: