Detailed Description

Description:: This class is available in release 2.0 and later only.

This class describes the properties of a NURBS curve. This includes its number of trim points and its open/closed state. The Evaluate() method is used to compute points on the curve.

All methods of this class are implemented by the system.

Data Members:: protected:

int mMatID;

This data member is available in release 3.0 and later only.

The material ID for the curve.

#include <surf_api.h>

Inheritance diagram for NURBSCurve:

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Public Member Functions
DllExport	NURBSCurve (void)
virtual DllExport	~NURBSCurve (void)
DllExport NURBSCurve &	operator= (const NURBSCurve &curve)
DllExport BOOL	IsClosed (void)
DllExport int	NumTrimPoints ()
DllExport NURBSTrimPoint	GetTrimPoint (TimeValue t, int i)
DllExport BOOL	Evaluate (TimeValue t, double u, Point3 &pt, Point3 &tangent)
DllExport void	GetParameterRange (TimeValue t, double &uMin, double &uMax)
DllExport BOOL	GetNURBSData (TimeValue t, int &degree, int &numCVs, NURBSCVTab &cvs, int &numKnots, NURBSKnotTab &knots)
DllExport int	MatID ()
DllExport void	MatID (int id)
Protected Attributes
int	mMatID
Friends
class	NURBSCVCurve
class	NURBSPointCurve
class	NURBSBlendCurve
class	NURBSOffsetCurve
class	NURBSXFormCurve
class	NURBSMirrorCurve
class	NURBSFilletCurve
class	NURBSChamferCurve
class	NURBSIsoCurve
class	NURBSSurfaceEdgeCurve
class	NURBSProjectVectorCurve
class	NURBSProjectNormalCurve
class	NURBSSurfaceNormalCurve
class	NURBSNBlendSurface
class	NURBSRuledSurface
class	NURBSULoftSurface
class	NURBSUVLoftSurface
class	NURBSExtrudeSurface
class	NURBSLatheSurface
class	NURBSCapSurface
class	NURBS1RailSweepSurface
class	NURBS2RailSweepSurface
class	NURBSMultiCurveTrimSurface

Constructor & Destructor Documentation

DllExport NURBSCurve ( void )

Remarks:: Constructor. The data members are initialized as follows:

mKind = kNURBSCurve;

mMatID = 1;

virtual DllExport ~NURBSCurve ( void ) [virtual]

DllExport NURBSCurve& operator= ( const NURBSCurve & curve )

DllExport BOOL IsClosed ( void )

DllExport int NumTrimPoints ( )

DllExport NURBSTrimPoint GetTrimPoint	(	TimeValue	t,
		int	i
	)

Parameters:: TimeValue t

The time to retrieve the trim point.

int i

The zero based index of the trim point to return.

Remarks:: Retrieves the point along the curve at the specified point and the tangent at that point.

Parameters:: TimeValue t

The time to evaluate the curve.

double u

Specifies the point along the curve to evaluate. This value must be between the uMin and uMax as returned from GetParameterRange().

Point3& pt

The point along the curve is returned here.

Point3& tangent

The tangent at the specified point is returned here.

Returns:: TRUE if the method was able to evaluate the curve; otherwise FALSE.

DllExport void GetParameterRange	(	TimeValue	t,
		double &	uMin,
		double &	uMax
	)

Remarks:: Retrieves the minimum and maximum valid values for u as passed to Evaluate().

Parameters:: TimeValue t

The time to get the parameter range of the curve.

double& uMin

The minimum value is returned here.

double& uMax

The maximum value is returned here.

DllExport BOOL GetNURBSData	(	TimeValue	t,
		int &	degree,
		int &	numCVs,
		NURBSCVTab &	cvs,
		int &	numKnots,
		NURBSKnotTab &	knots
	)

Parameters:: TimeValue t

The time at which to get the NURBS information.

int& degree

The degree of the curve.

int& numCVs

The number of CVs.

NURBSCVTab& cvs

The table of CVs. Note: typedef Tab<NURBSControlVertex> NURBSCVTab;

int& numKnots

The number of knots.

NURBSKnotTab knots

A table of knots in U. Note: typedef Tab<double> NURBSKnotTab;