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SoNurbsCurve Class Reference

The SoNurbsCurve class is a node for representing smooth curves. More...

#include <Inventor/nodes/SoNurbsCurve.h>

Inheritance diagram for SoNurbsCurve::

SoShape SoNode SoFieldContainer SoBase List of all members.

Public Methods

 SoNurbsCurve (void)
virtual void GLRender (SoGLRenderAction *action)
virtual void rayPick (SoRayPickAction *action)
virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)
virtual void getBoundingBox (SoGetBoundingBoxAction *action)
void sendPrimitive (SoAction *, SoPrimitiveVertex *)

Static Public Methods

void initClass (void)

Public Attributes

SoSFInt32 numControlPoints
SoMFFloat knotVector

Protected Methods

virtual ~SoNurbsCurve ()
virtual void generatePrimitives (SoAction *action)
virtual void computeBBox (SoAction *action, SbBox3f &box, SbVec3f &center)
virtual SoDetailcreateLineSegmentDetail (SoRayPickAction *action, const SoPrimitiveVertex *v1, const SoPrimitiveVertex *v2, SoPickedPoint *pp)

Detailed Description

The SoNurbsCurve class is a node for representing smooth curves.

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.


Constructor & Destructor Documentation

SoNurbsCurve::SoNurbsCurve void   
 

Constructor.

SoNurbsCurve::~SoNurbsCurve   [protected, virtual]
 

Destructor.


Member Function Documentation

void SoNurbsCurve::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 SoNurbsCurve::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 SoNurbsCurve::rayPick SoRayPickAction   action [virtual]
 

Calculates picked point based on primitives generated by subclasses.

Reimplemented from SoShape.

void SoNurbsCurve::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 SoNurbsCurve::getBoundingBox SoGetBoundingBoxAction   action [virtual]
 

Redefined to notify open caches that this shape contains lines.

Reimplemented from SoShape.

void SoNurbsCurve::sendPrimitive SoAction   a,
SoPrimitiveVertex   p
 

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 SoNurbsCurve::generatePrimitives SoAction   action [protected, virtual]
 

For internal use only.

Reimplemented from SoShape.

void SoNurbsCurve::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 * SoNurbsCurve::createLineSegmentDetail SoRayPickAction   action,
const SoPrimitiveVertex   v1,
const SoPrimitiveVertex   v2,
SoPickedPoint   pp
[protected, virtual]
 

Overloaded to return NULL.

Reimplemented from SoShape.


Member Data Documentation

SoSFInt32 SoNurbsCurve::numControlPoints
 

Number of control points to use in this NURBS curve.

SoMFFloat SoNurbsCurve::knotVector
 

The knot vector.


The documentation for this class was generated from the following files:
Generated on Sat Jan 12 11:41:11 2002 for Coin by doxygen1.2.12 written by Dimitri van Heesch, © 1997-2001