PLib::NurbsSurfaceSP< T, N > Class Template Reference

A NURBS surface with surface point. More...

#include <nurbsS_sp.h>

Inheritance diagram for PLib::NurbsSurfaceSP< T, N >:

List of all members.

Public Member Functions
	NurbsSurfaceSP (const NurbsSurface< T, N > &nS)
	NurbsSurfaceSP (const NurbsSurfaceSP< T, N > &nS)
	NurbsSurfaceSP (int DegU, int DegV, const Vector< T > &Uk, const Vector< T > &Vk, const Matrix< HPoint_nD< T, N > > &Cp)
	NurbsSurfaceSP (int DegU, int DegV, Vector< T > &Uk, Vector< T > &Vk, Matrix< Point_nD< T, N > > &Cp, Matrix< T > &W)
virtual NurbsSurface< T, N > &	operator= (const NurbsSurface< T, N > &a)
virtual NurbsSurfaceSP< T, N > &	operator= (const NurbsSurfaceSP< T, N > &a)
virtual void	resizeKeep (int Pu, int Pv, int DegU, int DegV)
virtual void	refineKnots (const Vector< T > &nU, const Vector< T > &nV)
virtual void	refineKnotU (const Vector< T > &X)
virtual void	refineKnotV (const Vector< T > &X)
virtual void	mergeKnots (const Vector< T > &nU, const Vector< T > &nV)
virtual void	mergeKnotU (const Vector< T > &X)
virtual void	mergeKnotV (const Vector< T > &X)
virtual int	read (ifstream &fin)
virtual void	degreeElevateU (int tU)
virtual void	degreeElevateV (int tV)
NurbsSurfaceSP< T, N >	generateParallel (T d) const
void	modSurfCPby (int i, int j, const HPoint_nD< T, N > &a)
void	modSurfCP (int i, int j, const HPoint_nD< T, N > &a)
void	modOnlySurfCPby (int i, int j, const HPoint_nD< T, N > &a)
void	modOnlySurfCP (int i, int j, const HPoint_nD< T, N > &a)
T	maxAtUV (int i, int j) const
T	maxAtU (int i) const
T	maxAtV (int i) const
HPoint_nD< T, N >	surfP (int i, int j) const
void	updateMaxUV ()
void	updateMaxU ()
void	updateMaxV ()
int	okMax ()
Protected Attributes
Vector< T >	maxU
Vector< T >	maxV
Vector< T >	maxAtU_
Vector< T >	maxAtV_

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Detailed Description

template<class T, int N>
class PLib::NurbsSurfaceSP< T, N >

A NURBS surface with surface point.

A Nurbs surface with surface point manipulators. This allows someone to modify the point on a surface for which a control point has maximal influence over it. This might provide a more intuitive method to modify a surface.

Author:

Philippe Lavoie

Date:

8 May, 1998

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Member Function Documentation

template<class T, int N> void PLib::NurbsSurfaceSP< T, N >::degreeElevateU (  int  tU  )  [inline, virtual]

Degree elevate the surface in the U direction. Parameters: t  elevate the degree in the u direction by this amount. Author: Philippe Lavoie Date: 24 January, 1997 Reimplemented from PLib::NurbsSurface< T, N >.

template<class T, int N> void PLib::NurbsSurfaceSP< T, N >::degreeElevateV (  int  tV  )  [inline, virtual]

Degree elevate the surface in the V direction. Parameters: t  elevate the degree in the v direction by this amount. Author: Philippe Lavoie Date: 24 January, 1997 Reimplemented from PLib::NurbsSurface< T, N >.

template<class T, int N> NurbsSurfaceSP< T, N > PLib::NurbsSurfaceSP< T, N >::generateParallel (  T  d  )  const

Generate a parallel surface. Generates an offset surface from this surface. An offset surface is a surface wich has its surface parallel to an other one. There is a distance of d between the two parallel surfaces. The algorithm used is very naive. It generates a surface such that a point s_2(u,v) = s(u,v) + d n(u,v) where s_2(u,v,) is the point on the parallel surface at (u,v) , s(u,v) is the point on the original surface at (u,v), d is the offset between the two and n(u,v) is the normal on the surface at the point (u,v). Parameters: d  the distance between the surface and its offset the parallel surface. Author: Philippe Lavoie Date: 8 May, 1998

template<class T, int N> T PLib::NurbsSurfaceSP< T, N >::maxAtU (  int  i  )  const [inline]

< Where is the maximal basis function in U for the control points in row i

template<class T, int N> T PLib::NurbsSurfaceSP< T, N >::maxAtUV (  int  i, int  j )  const [inline]

< The maximal basis function for the control point i,j

template<class T, int N> T PLib::NurbsSurfaceSP< T, N >::maxAtV (  int  i  )  const [inline]

< Where is the maximal basis function in U for the control points in colum i

template<class T, int N> void PLib::NurbsSurfaceSP< T, N >::mergeKnots (  const Vector< T > &  nU, const Vector< T > &  nV )  [inline, virtual]

merges a U and V knot vector with the surface knot vectors Parameters: nU  the U knot vector to merge with nV  the V knot vector to merge with Warning: The nU and nV knot vectors must be compatible with the current vectors Author: Philippe Lavoie Date: 24 January, 1997 Reimplemented from PLib::NurbsSurface< T, N >.

template<class T, int N> void PLib::NurbsSurfaceSP< T, N >::mergeKnotU (  const Vector< T > &  X  )  [inline, virtual]

merges the U knot vector with another one Parameters: X  a knot vector Warning: The knot vector must be compatible with the U knot vector Author: Philippe Lavoie Date: 24 January, 1997 Reimplemented from PLib::NurbsSurface< T, N >.

template<class T, int N> void PLib::NurbsSurfaceSP< T, N >::mergeKnotV (  const Vector< T > &  X  )  [inline, virtual]

merges the V knot vector with another one Parameters: X  a knot vector Warning: The knot vector must be compatible with the V knot vector Author: Philippe Lavoie Date: 24 January, 1997 Reimplemented from PLib::NurbsSurface< T, N >.

template<class T, int N> void PLib::NurbsSurfaceSP< T, N >::modOnlySurfCP (  int  i, int  j, const HPoint_nD< T, N > &  a )  [inline]

Parameters: a  Changes only the the surface point near a control point, the other surface point will not be moved.

template<class T, int N> void PLib::NurbsSurfaceSP< T, N >::modOnlySurfCPby (  int  i, int  j, const HPoint_nD< T, N > &  a )

Move the surface point only. Moves only the specified surface point. The other surface points normally affected by moving this point are {not} moved. The point a is in the 4D homogenous space, but only the x,y,z value are used. The weight is not moved by this function. Parameters: i  the row of the surface point to move j  the column of the surface point to move a  move that surface point by that amount. Author: Philippe Lavoie Date: 7 June, 1998

template<class T, int N> void PLib::NurbsSurfaceSP< T, N >::modSurfCP (  int  i, int  j, const HPoint_nD< T, N > &  a )  [inline]

Parameters: a  Moves a surface point to a value

template<class T, int N> void PLib::NurbsSurfaceSP< T, N >::modSurfCPby (  int  i, int  j, const HPoint_nD< T, N > &  a )  [inline]

Parameters: a  Moves a surface point by a value

template<class T, int N> NurbsSurface< T, N > & PLib::NurbsSurfaceSP< T, N >::operator= (  const NurbsSurface< T, N > &  nS  )  [inline, virtual]

NurbsSurface<T,N> assignment. Parameters: nS  the NURBS surface to copy Author: Philippe Lavoie Date: 24 January, 1997 Reimplemented from PLib::NurbsSurface< T, N >.

template<class T, int N> int PLib::NurbsSurfaceSP< T, N >::read (  ifstream &  fin  )  [inline, virtual]

Read a surface from an input stream. Parameters: fin  the input file stream Returns: 0 if an error occurs, 1 otherwise Author: Philippe Lavoie Date: 24 January, 1997 Reimplemented from PLib::NurbsSurface< T, N >. Reimplemented in PLib::NurbsSurfaceGL.

template<class T, int N> void PLib::NurbsSurfaceSP< T, N >::refineKnots (  const Vector< T > &  nU, const Vector< T > &  nV )  [inline, virtual]

Refine both knot vectors. Parameters: nU  the U knot vector to refine from nV  the V knot vector to refine from Author: Philippe Lavoie Date: 24 January, 1997 Reimplemented from PLib::NurbsSurface< T, N >.

template<class T, int N> void PLib::NurbsSurfaceSP< T, N >::refineKnotU (  const Vector< T > &  X  )  [inline, virtual]

Refines the U knot vector. Parameters: X  the knot vector to refine from Author: Philippe Lavoie Date: 24 January, 1997 Reimplemented from PLib::NurbsSurface< T, N >.

template<class T, int N> void PLib::NurbsSurfaceSP< T, N >::refineKnotV (  const Vector< T > &  X  )  [inline, virtual]

Refines the V knot vector. Parameters: X  the knot vector to refine from Author: Philippe Lavoie Date: 24 January, 1997 Reimplemented from PLib::NurbsSurface< T, N >.

template<class T, int N> void PLib::NurbsSurfaceSP< T, N >::resizeKeep (  int  Pu, int  Pv, int  DegU, int  DegV )  [inline, virtual]

Resize the surface while keeping the old values. Parameters: Pu  the number of control points in the U direction Pv  the number of control points in the V direction DegU  the degree of the surface in the U direction DegV  the degree of the surface in the V direction Author: Philippe Lavoie Date: 24 January, 1997 Reimplemented from PLib::NurbsSurface< T, N >.

template<class T, int N> HPoint_nD<T,N> PLib::NurbsSurfaceSP< T, N >::surfP (  int  i, int  j )  const [inline]

< the surface point for the control point at i,j

template<class T, int N> void PLib::NurbsSurfaceSP< T, N >::updateMaxU (   )

Updates the basis value for the U direction. Updates the basis value at which a control point has maximal influence. It also finds where the control point has maximal influence. Warning: The degree in U of the surface must be of 3 or less. Author: Philippe Lavoie Date: 8 May, 1998

template<class T, int N> void PLib::NurbsSurfaceSP< T, N >::updateMaxV (   )

Updates the basis value for the V direction. Updates the basis value at which a control point has maximal influence. It also finds where the control point has maximal influence. Warning: The degree in V of the surface must be of 3 or less. Author: Philippe Lavoie Date: 8 May, 1998

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Member Data Documentation

template<class T, int N> Vector<T> PLib::NurbsSurfaceSP< T, N >::maxAtU_ [protected]

The vector identifiying where is the maximal basis function in U.

template<class T, int N> Vector<T> PLib::NurbsSurfaceSP< T, N >::maxAtV_ [protected]

The vector identifiying where is the maximal basis function in V.

template<class T, int N> Vector<T> PLib::NurbsSurfaceSP< T, N >::maxU [protected]

The vector of maximal basis function value in U.

template<class T, int N> Vector<T> PLib::NurbsSurfaceSP< T, N >::maxV [protected]

The vector of maximal basis function value in V.

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

• nurbsS_sp.h
• nurbsS_sp.cpp

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