Inventor/nodes/SoTriangleSet.h

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

#ifndef  _SO_TRIANGLE_SET_
#define  _SO_TRIANGLE_SET_

#include <Inventor/SbLinear.h>
#include <Inventor/fields/SoSFInt32.h>
#include <Inventor/nodes/SoNonIndexedShape.h>

// This value, when used in the numTriangles field, means that the
// corresponding set should use the rest of the vertices
#define SO_TRIANGLE_SET_USE_REST_OF_VERTICES        (-1)

class SoCoordinateElement;
class SoNormalBundle;
class SoState;
class SoVolumeTriangleSet;

//@TOBEWRAPPED
class  SoTriangleSet : public SoNonIndexedShape {

  SO_NODE_HEADER(SoTriangleSet);

 public:

  SoSFInt32 numTriangles;

  SoTriangleSet();

 private:
  // Implement actions

  virtual void        GLRender(SoGLRenderAction *action);

  virtual void  getPrimitiveCount(SoGetPrimitiveCountAction *action);

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

  virtual SbMatrix3* computeVtxTangentSpaceMat(const float *bumpTexCoords, int &numMat) const ;

 private:
  // returns the number of PARTS
  inline int getNumParts(void) const { return numTris; } // PARTS are Triangles

  // returns the number of FACES
  inline int getNumFaces(void) const { return numTris; } // FACES are Triangles

  // returns the number of vertices needed
  int getNumVerticesNeeded(void) const;  

  // Checks if enough vertices, normals, textureCoord, colors...etc...
  bool check_RenderVectors( SoState *state, bool bUseTexCoordsAnyway );

  static void  initClass();

  static void  exitClass();

 private:

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

  virtual void callDEBUGGLRender(SoGLRenderAction *action,uint32_t useTexCoordsAnyway);

  //Free memory
  virtual void exitRender(SoState *state,int stateFlag,
                  SoTextureCoordinateBundle *tcb,
                  SoTextureCoordinate3Bundle *tc3b);

  // keep track of whether we are using USE_REST_OF_VERTICES
  SbBool m_usingUSE_REST;

  SbBool m_nvNotifyEnabled;

  void setNvNotifyEnabled(SbBool _nvNotifyEnabled)
  {
    m_nvNotifyEnabled = _nvNotifyEnabled;
  }

  SbBool getNvNotifyEnabled(){return m_nvNotifyEnabled;}

  virtual int getMaxTestValueForAutoCache(){return totalNumVertices;}

  virtual int getMinTestValueForAutoCache(){return totalNumVertices;}

  virtual int getNumPrim(){return totalNumVertices;}

  virtual int getNumVert();

  virtual void countPrim(){setupNumTrisQuadsFaces();}

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

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

  // render function
  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);

  ~SoTriangleSet();

private:
  // reset numTris to -1, to rechecks SO_USE_REST_OF_VERTICES usage when notified
  virtual void        notify(SoNotList *list);

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

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

   virtual int getNumNeededNormals(SoState *state);

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

  // Number of triangles, quads, (n>4)-vertex faces, total vertices
  int     numTris, totalNumVertices;

  friend class SoVolumeTriangleSetDl;
};

#endif /* _SO_TRIANGLE_SET_ */

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Open Inventor Toolkit reference manual, generated on 12 Feb 2024
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