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PLib::NurbsSurfaceSP Class Template Reference

A NURBS surface with surface point. More...

#include <nurbsS_sp.h>

Inheritance diagram for PLib::NurbsSurfaceSP:

PLib::NurbsSurface PLib::ParaSurface List of all members.

Public Methods

 NurbsSurfaceSP ()
 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_

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

Definition at line 49 of file nurbsS_sp.h.

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.

Definition at line 376 of file nurbsS_sp.h.

References updateMaxU.

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.

Definition at line 390 of file nurbsS_sp.h.

References updateMaxV.

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

Definition at line 124 of file nurbsS_sp.cpp.

References maxAtU_, maxAtV_, PLib::NurbsSurface::normal, PLib::NurbsSurface::ok, PLib::NurbsSurface::P, PLib::BasicArray< int >::reset, PLib::NurbsSurface::U, and PLib::NurbsSurface::V.

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.

Definition at line 315 of file nurbsS_sp.h.

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.

Definition at line 331 of file nurbsS_sp.h.

References updateMaxU.

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.

Definition at line 347 of file nurbsS_sp.h.

References updateMaxV.

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.

Definition at line 87 of file nurbsS_sp.h.

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

Definition at line 262 of file nurbsS_sp.cpp.

References PLib::NurbsSurface::degU, PLib::NurbsSurface::degV, maxAtU_, maxAtV_, PLib::NurbsSurface::movePoint, and PLib::NurbsSurface::P.

Referenced by PLib::NurbsSurfaceSP< float, 3 >::modOnlySurfCP.

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

Definition at line 83 of file nurbsS_sp.h.

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

Definition at line 81 of file nurbsS_sp.h.

Referenced by PLib::NurbsSurfaceSP< float, 3 >::modSurfCP.

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.

Definition at line 210 of file nurbsS_sp.h.

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.

Reimplemented in PLib::NurbsSurfaceGL.

Definition at line 361 of file nurbsS_sp.h.

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.

Definition at line 266 of file nurbsS_sp.h.

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.

Definition at line 282 of file nurbsS_sp.h.

References updateMaxU.

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.

Definition at line 298 of file nurbsS_sp.h.

References updateMaxV.

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.

Definition at line 249 of file nurbsS_sp.h.

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

Definition at line 45 of file nurbsS_sp.cpp.

References PLib::NurbsSurface::degU, maxAtU_, maxU, PLib::NurbsSurface::P, and PLib::NurbsSurface::U.

Referenced by degreeElevateU, mergeKnotU, and refineKnotU.

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

Definition at line 80 of file nurbsS_sp.cpp.

References PLib::NurbsSurface::degV, maxAtV_, maxV, PLib::NurbsSurface::P, and PLib::NurbsSurface::V.

Referenced by degreeElevateV, mergeKnotV, and refineKnotV.

The documentation for this class was generated from the following files:
Generated on Tue Jun 24 13:27:01 2003 for NURBS++ by doxygen1.2.14 written by Dimitri van Heesch, © 1997-2002