Inventor/nodes/SoFaceSet.h

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/*=======================================================================
** Author      : Paul S. Strauss (MMM yyyy)
** Modified by : Gavin Bell (MMM yyyy)
**=======================================================================*/
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/


#ifndef  _SO_FACE_SET_
#define  _SO_FACE_SET_

#include <Inventor/SbLinear.h>
#include <Inventor/fields/SoMFInt32.h>
#include <Inventor/nodes/SoNonIndexedShape.h>

//
//  Class: SoFaceSet
//
//  Set of faces. Each face consists of 3 or more vertices, taken in
//  order from the current coordinates. The startIndex field gives the
//  starting coordinate index for the first face. The number of
//  vertices in each face is determined by successive entries in the
//  numVertices field.
//

// This value, when used in the numVertices field, means that the
// corresponding face should use the rest of the vertices
#define SO_FACE_SET_USE_REST_OF_VERTICES        (-1)

class SoCoordinateElement;
class SoNormalBundle;
class SoState;
class SoVolumeFaceSet;

class  SoFaceSet : public SoNonIndexedShape {

  SO_NODE_HEADER(SoFaceSet);

 public:

  SoMFInt32           numVertices;

  SoFaceSet();

 private:
  // Implement actions
  virtual void        GLRender(SoGLRenderAction *action);

  virtual void  getPrimitiveCount(SoGetPrimitiveCountAction *action);

  // Generates default normals using the given normal bundle.
  // Returns TRUE.
  virtual void      generateDefaultNormals(SoState *state,
                                            const SbVec3f *coords,
                                            int numCoords,
                                            SoNormalBundle *nb,
                                            SbBool storeRef = FALSE);

  // Compute transformations from Modelling coordinate to tangent space (facet space).
  virtual SbMatrix3* computeVtxTangentSpaceMat(const float *bumpTexCoords, int &numMat) const ;

 private:
  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
  };

  //shape must check shape hints in GlRender
  virtual SbBool shouldCheckShapeHints(){ return TRUE;}

  //Test function
  virtual SbBool shapeHintsTest(){ return (numQuads > 0 || numPolys > 0);}

  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);

  ~SoFaceSet();

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

  // returns the number of FACES
  inline int getNumFaces(void) const { return numTris + numQuads + numPolys; } 

  // 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 );

  // set numTris/Quads/Faces to -1, checks SO_USE_REST_OF_VERTICES
  // 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, numQuads, numPolys, totalNumVertices;

  static const int AUTO_CACHE_FS_MIN_WITHOUT_VP;

  static const int AUTO_CACHE_FS_MAX;
};

#endif /* _SO_FACE_SET_ */

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Open Inventor Toolkit reference manual, generated on 12 Feb 2024
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