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NAME

       SoIndexedNurbsCurve -

       The SoIndexedNurbsCurve 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.

SYNOPSIS

       #include <Inventor/nodes/SoIndexedNurbsCurve.h>

       Inherits SoShape.

   Public Member Functions
       SoIndexedNurbsCurve (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 Member Functions
       static void initClass (void)

   Public Attributes
       SoSFInt32 numControlPoints
       SoMFInt32 coordIndex
       SoMFFloat knotVector

   Protected Member Functions
       virtual ~SoIndexedNurbsCurve ()
       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 SoIndexedNurbsCurve 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.

       FILE FORMAT/DEFAULTS:

           IndexedNurbsCurve {
               numControlPoints 0
               coordIndex 0
               knotVector 0
           }

Constructor & Destructor Documentation

   SoIndexedNurbsCurve::SoIndexedNurbsCurve (void) Constructor.
   SoIndexedNurbsCurve::~SoIndexedNurbsCurve () [protected, virtual]
       Destructor.

Member Function Documentation

   void SoIndexedNurbsCurve::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 SoIndexedNurbsCurve::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 SoIndexedNurbsCurve::rayPick (SoRayPickAction * action) [virtual]
       Calculates picked point based on primitives generated by subclasses.
       Reimplemented from SoShape.

   void SoIndexedNurbsCurve::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 SoIndexedNurbsCurve::getBoundingBox (SoGetBoundingBoxAction * action)
       [virtual] Redefined to notify open caches that this shape contains
       lines.
       Reimplemented from SoShape.

   void SoIndexedNurbsCurve::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 SoIndexedNurbsCurve::generatePrimitives (SoAction * action)
       [protected, virtual] The method implements action behavior for shape
       nodes for SoCallbackAction. It is invoked from SoShape::callback().
       (Subclasses should not override SoNode::callback().)
       The subclass implementations uses the convenience methods
       SoShape::beginShape(), SoShape::shapeVertex(), and SoShape::endShape(),
       with SoDetail instances, to pass the primitives making up the shape
       back to the caller.

       Implements SoShape.

   void SoIndexedNurbsCurve::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.
       Implements SoShape.

   SoDetail * SoIndexedNurbsCurve::createLineSegmentDetail (SoRayPickAction *
       action, const SoPrimitiveVertex * v1, const SoPrimitiveVertex * v2,
       SoPickedPoint * pp) [protected, virtual] Will create line detail for a
       SoPickedPoint. This method will only be called internally, when
       generatePrimitives() is used for picking (SoShape::rayPick() is not
       overridden).
       This method returns NULL in Open Inventor, and subclasses will need to
       override this method to create details for a SoPickedPoint.

       This is not necessary with Coin. Of course, if you choose to override
       it, it will work in the same way as Open Inventor.

       For this to work, you must supply a face or line detail when generating
       primitives. If you supply NULL for the detail argument in
       SoShape::beginShape(), you’ll have to override this method.

       Reimplemented from SoShape.

Member Data Documentation

   SoSFInt32 SoIndexedNurbsCurve::numControlPoints Number of control points
       for this curve.
   SoMFInt32 SoIndexedNurbsCurve::coordIndex The control point indices. Supply
       at least numControlPoint indices.
   SoMFFloat SoIndexedNurbsCurve::knotVector The knot vector.

Author

       Generated automatically by Doxygen for Coin from the source code.