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PLib::NurbsCurveSP Class Template Reference

A NURBS curve with surface point. More...

#include <nurbs_sp.h>

Inheritance diagram for PLib::NurbsCurveSP:

Public Methods
	NurbsCurveSP ()
	NurbsCurveSP (const NurbsCurve< T, N > &nurb)
	NurbsCurveSP (const NurbsCurveSP< T, N > &nurb)
	NurbsCurveSP (const Vector< HPoint_nD< T, N > > &P1, const Vector< T > &U1, int degree=3)
	NurbsCurveSP (const Vector< Point_nD< T, N > > &P1, const Vector< T > &W, const Vector< T > &U1, int degree=3)
virtual void	reset (const Vector< HPoint_nD< T, N > > &P1, const Vector< T > &U1, int degree)
virtual NurbsCurve< T, N > &	operator= (const NurbsCurve< T, N > &a)
NurbsCurveSP< T, N > &	operator= (const NurbsCurveSP< T, N > &a)
virtual void	modKnot (const Vector< T > &knot)
virtual void	removeKnot (int r, int s, int num)
virtual void	removeKnotsBound (const Vector< T > &ub, Vector< T > &ek, T E)
virtual void	refineKnotVector (const Vector< T > &X)
virtual void	mergeKnotVector (const Vector< T > &Um)
virtual void	knotInsertion (T u, int r, NurbsCurveSP< T, N > &nc)
virtual void	degreeElevate (int t)
int	read (ifstream &fin)
void	modSurfCPby (int i, const HPoint_nD< T, N > &a)
void	modSurfCP (int i, const HPoint_nD< T, N > &a)
void	modOnlySurfCPby (int i, const HPoint_nD< T, N > &a)
void	modOnlySurfCP (int i, const HPoint_nD< T, N > &a)
T	maxAt (int i) const
HPoint_nD< T, N >	surfP (int i) const
void	updateMaxU ()
int	okMax ()
Protected Attributes
Vector< T >	maxU
Vector< T >	maxAt_

Detailed Description

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

A NURBS curve with surface point.

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

Author:: Philippe Lavoie

Date:: 7 May, 1998

Definition at line 47 of file nurbs_sp.h.

Member Function Documentation

template<class T, int N>

void PLib::NurbsCurveSP< T, N >::modOnlySurfCPby ( int i,

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 surface point to move

a move that surface point by that amount.

Warning:
The degree of the curve must be of 3 or less.
Author:
Philippe Lavoie
Date:
7 June, 1998

Definition at line 104 of file nurbs_sp.cpp.

template<class T, int N>

NurbsCurve< T, N > & PLib::NurbsCurveSP< T, N >::operator= ( const NurbsCurve< T, N > & a ) [inline, virtual]

The assignment operator for a NURBS curve.

Parameters:

curve the NURBS curve to copy

Returns:
A reference to itself
Warning:
The curve being copied must be valid, otherwise strange results might occur.
Author:
Philippe Lavoie
Date:
24 January 1997

Reimplemented from PLib::NurbsCurve.
Definition at line 138 of file nurbs_sp.h.
References updateMaxU.

template<class T, int N>

void PLib::NurbsCurveSP< T, N >::removeKnot ( int r,

int s,

int num

) [inline, virtual]

Removes an internal knot from a curve. This is A5.8 on p185 from the NURB book modified to not check for tolerance before removing the knot.

Parameters:

r the knot to remove

s the multiplicity of the knot

num the number of times to try to remove the knot

Warning:
r must be an internal knot.
Author:
Philippe Lavoie
Date:
24 January 1997

Reimplemented from PLib::NurbsCurve.
Definition at line 159 of file nurbs_sp.h.
References updateMaxU.

template<class T, int N>

void PLib::NurbsCurveSP< T, N >::removeKnotsBound ( const Vector< T > & ub,

Vector< T > & ek,

T E

) [inline, virtual]

Remove knots from a curve without exceeding an error bound.

For more information about the algorithm, see A9.9 on p429 of the NURB book.
Parameters:

ub the knot coefficients

ek the error after removing

Author:
Philippe Lavoie
Date:
24 January 1997

Reimplemented from PLib::NurbsCurve.
Definition at line 165 of file nurbs_sp.h.
References updateMaxU.

template<class T, int N>

void PLib::NurbsCurveSP< T, N >::reset ( const Vector< HPoint_nD< T, N > > & P1,

const Vector< T > & U1,

int degree

) [inline, virtual]

Resets a NURBS curve to new values.

Parameters:

P1 the new values for the control points

U1 the new values for the knot vector

Degree the new degree of the curve

Warning:
The size of P1,U1 and Degree must agree: P.n()+degree+1=U.n()
Author:
Philippe Lavoie
Date:
24 January 1997

Reimplemented from PLib::NurbsCurve.
Definition at line 132 of file nurbs_sp.h.
References PLib::NurbsCurve::degree, and updateMaxU.

template<class T, int N>

void PLib::NurbsCurveSP< T, N >::updateMaxU ( )

Updates the basis value.

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 of the curve must be of 3 or less.
Author:
Philippe Lavoie
Date:
7 May, 1998

Definition at line 49 of file nurbs_sp.cpp.
References PLib::NurbsCurve::basisFun.
Referenced by operator=, removeKnot, removeKnotsBound, and reset.

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

Generated on Tue Jun 24 13:27:00 2003 for NURBS++ by

PLib::NurbsCurveSP Class Template Reference

Public Methods

Protected Attributes

Detailed Description

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

Member Function Documentation

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