Inventor/nodes/SoIndexedTriangleSet.h

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**=======================================================================*/
/*=======================================================================
** Author      : David Beilloin (Mar 2011)
** Modified by : VSG (MMM YYYY)
**=======================================================================*/

#ifndef  _SO_INDEXED_TRIANGLE_SET_
#define  _SO_INDEXED_TRIANGLE_SET_

#include <Inventor/nodes/SoIndexedShape.h>

class SoNormalBundle;
class SoCoordinateElement;
class SoShapeStyleElement;
class SoVolumeIndexedTriangleSet;

//@TOBEWRAPPED
class  SoIndexedTriangleSet : public SoIndexedShape {

  SO_NODE_HEADER(SoIndexedTriangleSet);

 public:
  // Inherits fields

  SoIndexedTriangleSet();

 private:
  // Implements actions

  virtual void GLRender(SoGLRenderAction *action);

  virtual void generateDefaultNormals(SoState *state,
    const SbVec3f *coords,
    int numCoords, 
    SoNormalBundle *nb,
    SbBool storeRef = FALSE);

  virtual void getPrimitiveCount(SoGetPrimitiveCountAction *action);
                                                  
 private:

  static void initClass();

  static void exitClass();

  virtual int getNumNeededNormals(SoState *state);

 private:
  // This enum is used to indicate the current material or normal binding
  enum Binding {
    OVERALL, PER_FACE, PER_FACE_INDEXED, PER_VERTEX,
    PER_VERTEX_INDEXED
  };

  virtual SbBool shouldGenerateTexture3DCoordinates(){return TRUE;}

  virtual void callSetupIndices(const SoShapeStyleElement* shapeStyle,uint32_t useTexCoordsAnyway);

  //Wether to check or not 3d tex coords
  virtual SbBool checkTex3Coords(){return TRUE;}

  // Compute the number of vertices. This is just an approximation,
  //so using 5 verts per unknown polygon is close enough. 
  virtual int getNumPrim()
  {
    if (totalNumVertices==-1) 
      setupNumTrisQuadsFaces(); 
    return totalNumVertices;
  }

  int getNumPrim(int& _numTris )
  {
    if (totalNumVertices==-1)
      setupNumTrisQuadsFaces();
    _numTris = numTris;
    return totalNumVertices;
  }

  virtual void countPrim(){setupNumTrisQuadsFaces();}

  virtual SbBool numPrimInvalid(){return numTris < 0 ;}

  // Generates triangles representing faces
  virtual void        generatePrimitives(SoAction *action);

  // render function
  virtual void doRendering(SoGLRenderAction *action, const SoShapeStyleElement* shapeStyle);

  // Overrides standard method to create an SoFaceDetail instance
  virtual SoDetail *  createTriangleDetail(SoRayPickAction *action,
                                           const SoPrimitiveVertex *v1,
                                           const SoPrimitiveVertex *v2,
                                           const SoPrimitiveVertex *v3,
                                           SoPickedPoint *pp);

  // set numTris/Quads/Faces to -1 when notified
  virtual void        notify(SoNotList *list);

  // destructor
  virtual ~SoIndexedTriangleSet();

 private:

  // used internally by doRendering
  // return true if shape was correctly drawn.
  bool doRenderingVBO(SoGLRenderAction *action, const SoShapeStyleElement* shapeStyle);
  bool doRenderingNonIndexedVBO(SoGLRenderAction *action, const SoShapeStyleElement* shapeStyle);

  // Saves normal binding when generating primitives for picking
  Binding             savedNormalBinding;

  // Returns current material or normal binding from action's state
  static Binding getMaterialBinding(SoAction *action);
  Binding getNormalBinding(SoAction *action, SoNormalBundle *nb);

  // Set number of triangles/quads/faces, based on coordIndex array.
  void setupNumTrisQuadsFaces();
    
  // Number of triangles
  int     numTris, totalNumVertices;

  // optimized normal generation when no creaseAngle is defined.
  void buildPerFaceNormals(SoState *state,const SbVec3f *coords, const int numCoords, SoNormalBundle *nb);

  // optimized version of connectivity computation when tolerance factor is 0.0
  int32_t *buildConnectivity(const SbVec3f *coords, const int numCoords);

 private:
  friend class SoVolumeIndexedTriangleSetDl;
  friend class SoVolumeIndexedTriangleSet;
};

#endif /* _SO_INDEXED_TRIANGLE_SET_ */

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Open Inventor Toolkit reference manual, generated on 12 Feb 2024
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