---

SoNurbsCurve Class Reference

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

#include <Inventor/nodes/SoNurbsCurve.h>

Inheritance diagram for SoNurbsCurve::

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 SoDetail *	createLineSegmentDetail (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:

• SoNurbsCurve.cpp
• SoNurbsCurve.h

---