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SoNurbsSurface Class Reference

The SoNurbsSurface class is used to render smooth surfaces. More...

#include <Inventor/nodes/SoNurbsSurface.h>

Inheritance diagram for SoNurbsSurface::

List of all members.

Public Methods
	SoNurbsSurface (void)
virtual void	GLRender (SoGLRenderAction *action)
virtual void	rayPick (SoRayPickAction *action)
virtual void	getPrimitiveCount (SoGetPrimitiveCountAction *action)
void	sendPrimitive (SoAction *, SoPrimitiveVertex *)
Static Public Methods
void	initClass (void)
Public Attributes
SoSFInt32	numUControlPoints
SoSFInt32	numVControlPoints
SoSFInt32	numSControlPoints
SoSFInt32	numTControlPoints
SoMFFloat	uKnotVector
SoMFFloat	vKnotVector
SoMFFloat	sKnotVector
SoMFFloat	tKnotVector
Protected Methods
virtual	~SoNurbsSurface ()
virtual void	generatePrimitives (SoAction *action)
virtual void	computeBBox (SoAction *action, SbBox3f &box, SbVec3f &center)
SoDetail *	createTriangleDetail (SoRayPickAction *action, const SoPrimitiveVertex *v1, const SoPrimitiveVertex *v2, const SoPrimitiveVertex *v3, SoPickedPoint *pp)

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Detailed Description

The SoNurbsSurface class is used to render smooth surfaces.

Explaining NURBS is beyond the scope of this documentation. If you are unfamiliar with the principles of representing smooth curves and surfaces when doing 3D visualization, we recommend finding a good book on the subject.

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Constructor & Destructor Documentation

SoNurbsSurface::SoNurbsSurface (  void )

Constructor.

SoNurbsSurface::~SoNurbsSurface (  )  [protected, virtual]

Destructor.

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Member Function Documentation

void SoNurbsSurface::initClass (  void )  [static]

Sets up initialization for data common to all instances of this class, like submitting necessary information to the Coin type system. Reimplemented from SoShape.

void SoNurbsSurface::GLRender (  SoGLRenderAction * action )  [virtual]

Action method for the SoGLRenderAction. This is called during rendering traversals. Nodes influencing the rendering state in any way or who wants to throw geometry primitives at OpenGL overrides this method. Reimplemented from SoShape.

void SoNurbsSurface::rayPick (  SoRayPickAction * action )  [virtual]

Calculates picked point based on primitives generated by subclasses. Reimplemented from SoShape.

void SoNurbsSurface::getPrimitiveCount (  SoGetPrimitiveCountAction * action )  [virtual]

Action method for the SoGetPrimitiveCountAction. Calculates the number of triangle, line segment and point primitives for the node and adds these to the counters of the action. Nodes influencing how geometry nodes calculates their primitive count also overrides this method to change the relevant state variables. Reimplemented from SoShape.

void SoNurbsSurface::sendPrimitive (  SoAction * , SoPrimitiveVertex * )

This method is part of the original SGI Inventor API, but not implemented in Coin, as it looks like a method that should probably have been private in Open Inventor.

void SoNurbsSurface::generatePrimitives (  SoAction * action )  [protected, virtual]

For internal use only. Reimplemented from SoShape.

void SoNurbsSurface::computeBBox (  SoAction * action, SbBox3f & box, SbVec3f & center )  [protected, virtual]

Calculates the bounding box of all control points, and sets the center to the average of these points. Reimplemented from SoShape.

SoDetail * SoNurbsSurface::createTriangleDetail (  SoRayPickAction * action, const SoPrimitiveVertex * v1, const SoPrimitiveVertex * v2, const SoPrimitiveVertex * v3, SoPickedPoint * pp )  [protected, virtual]

Overloaded to return NULL. Reimplemented from SoShape.

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Member Data Documentation

SoSFInt32 SoNurbsSurface::numUControlPoints

Number of control points in the U direction.

SoSFInt32 SoNurbsSurface::numVControlPoints

Number of control points in the V direction.

SoSFInt32 SoNurbsSurface::numSControlPoints

Number of control points in the S direction.

SoSFInt32 SoNurbsSurface::numTControlPoints

Number of control points in the T direction.

SoMFFloat SoNurbsSurface::uKnotVector

The Bezier knot vector for the U direction.

SoMFFloat SoNurbsSurface::vKnotVector

The Bezier knot vector for the V direction.

SoMFFloat SoNurbsSurface::sKnotVector

The Bezier knot vector for the S direction.

SoMFFloat SoNurbsSurface::tKnotVector

The Bezier knot vector for the T direction.

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

• SoNurbsSurface.cpp
• SoNurbsSurface.h

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