Provided by: libcoin60-doc_3.1.3-2_all bug

NAME

       SoIndexedNurbsSurface -

       The SoIndexedNurbsSurface class can be used to render NURBS surfaces.

       It is very similar to the SoNurbsSurface class, but controlpoints can be specified using
       indices.

SYNOPSIS

       #include <Inventor/nodes/SoIndexedNurbsSurface.h>

       Inherits SoShape.

   Public Member Functions
       SoIndexedNurbsSurface (void)
       virtual void GLRender (SoGLRenderAction *action)
       virtual void rayPick (SoRayPickAction *action)
       virtual void getPrimitiveCount (SoGetPrimitiveCountAction *action)
       void sendPrimitive (SoAction *, SoPrimitiveVertex *)

   Static Public Member Functions
       static void initClass (void)

   Public Attributes
       SoSFInt32 numUControlPoints
       SoSFInt32 numVControlPoints
       SoMFInt32 coordIndex
       SoMFFloat uKnotVector
       SoMFFloat vKnotVector
       SoSFInt32 numSControlPoints
       SoSFInt32 numTControlPoints
       SoMFInt32 textureCoordIndex
       SoMFFloat sKnotVector
       SoMFFloat tKnotVector

   Protected Member Functions
       virtual ~SoIndexedNurbsSurface ()
       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)

Detailed Description

       The SoIndexedNurbsSurface class can be used to render NURBS surfaces.

       It is very similar to the SoNurbsSurface class, but controlpoints can be specified using
       indices.

       FILE FORMAT/DEFAULTS:

           IndexedNurbsSurface {
               numUControlPoints 0
               numVControlPoints 0
               coordIndex 0
               uKnotVector 0
               vKnotVector 0
               numSControlPoints 0
               numTControlPoints 0
               textureCoordIndex -1
               sKnotVector 0
               tKnotVector 0
           }

Constructor & Destructor Documentation

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

Member Function Documentation

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

   void SoIndexedNurbsSurface::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 SoIndexedNurbsSurface::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 SoIndexedNurbsSurface::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 SoIndexedNurbsSurface::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 * SoIndexedNurbsSurface::createTriangleDetail (SoRayPickAction *action, const
       SoPrimitiveVertex *v1, const SoPrimitiveVertex *v2, const SoPrimitiveVertex *v3,
       SoPickedPoint *pp) [protected, virtual] Will create triangle 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 SoIndexedNurbsSurface::numUControlPoints Number of control points in the U
       direction.
   SoSFInt32 SoIndexedNurbsSurface::numVControlPoints Number of control points in the V
       direction.
   SoMFInt32 SoIndexedNurbsSurface::coordIndex The coordinate control point indices.
   SoMFFloat SoIndexedNurbsSurface::uKnotVector The Bezier knot vector for the U direction.
   SoMFFloat SoIndexedNurbsSurface::vKnotVector The Bezier knot vector for the V direction.
   SoSFInt32 SoIndexedNurbsSurface::numSControlPoints Number of control points in the S
       direction.
   SoSFInt32 SoIndexedNurbsSurface::numTControlPoints Number of control points in the T
       direction.
   SoMFInt32 SoIndexedNurbsSurface::textureCoordIndex The texture coordinate control point
       indices.
   SoMFFloat SoIndexedNurbsSurface::sKnotVector The Bezier knot vector for the S direction.
   SoMFFloat SoIndexedNurbsSurface::tKnotVector The Bezier knot vector for the T direction.

Author

       Generated automatically by Doxygen for Coin from the source code.