SoTriangleStripSet.h

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**=======================================================================*/
/*=======================================================================
** Author      : Paul S. Strauss (MMM yyyy)
**=======================================================================*/
/*=======================================================================
 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef  _SO_TRIANGLE_STRIP_SET_
#define  _SO_TRIANGLE_STRIP_SET_
 
#include <Inventor/fields/SoMFInt32.h>
#include <Inventor/nodes/SoNonIndexedShape.h>
#include <Inventor/SbPImpl.h>

//
//  Class: SoTriangleStripSet
//
//  Triangle strip set node. Each strip in the set consists of n
//  vertices located at consecutive entries in the current
//  coordinates. The startIndex field gives the starting coordinate
//  index for the first strip. If materials or normals are bound to
//  vertices, they will begin at that index, as well; otherwise, they
//  will start at index 0.  The number of vertices in each strip is
//  determined by successive entries in the numVertices field.
//
 
class SoCoordinateElement;
class SoVolumeTriangleStripSet;
 
SO_PIMPL_PUBLIC_DECLARATION(SoTriangleStripSet)
 
// Deprecated feature; specifying USE_REST_OF_VERTICES as the last
// value in the numVertices field will use all the points in the
// coordinate array.
#define SO_TRI_STRIP_SET_USE_REST_OF_VERTICES   (-1)

class  SoTriangleStripSet : public SoNonIndexedShape
{
  SO_NODE_HEADER(SoTriangleStripSet);
  SO_PIMPL_PUBLIC_HEADER(SoTriangleStripSet)
 
public:
  // Fields
  SoMFInt32 numVertices;

  SoTriangleStripSet();
 
private:
  virtual void GLRender( SoGLRenderAction* action );

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

  virtual void shouldGenerateTangents( SoGLRenderAction* /*action*/, const SoShapeStyleElement* /*shapeStyle*/ ) {}

  virtual void getPrimitiveCount( SoGetPrimitiveCountAction* action );
 
private:
  // returns the number of PARTS
  int getNumStrips() const;
 
  static void initClass();
  static void exitClass();
 
  //Typedef of pointer to method on TriangleStripSet;
  //This will be used to simplify declaration and initialization.
  typedef void (SoTriangleStripSet::*PMTSS)(SoGLRenderAction *);
 
  // return num vertices for test
  virtual int getNumVert( SoState* state = NULL );
 
  //return number of primitives
  virtual int getNumPrim( SoState* state = NULL );
 
private:
 
  // Generates triangles representing strips
  virtual void generatePrimitives( SoAction* action );
 
  //Free memory
  virtual void exitRender( SoState* state,
                           int stateFlag,
                           SoTextureCoordinateBundle* tcb,
                           SoTextureCoordinate3Bundle* tc3b);
 
  // count primitives
  virtual void countPrim( SoState* state = NULL );
  
  // 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);
 
  virtual ~SoTriangleStripSet();
 
private:
  // Blow vpCache when vertexProperty field changes:
  virtual void notify( SoNotList* list );
 
private:
 
  static const int AUTO_CACHE_TSS_MIN_WITHOUT_VP;
  static const int AUTO_CACHE_TSS_MAX;
};
 
#endif /* _SO_TRIANGLE_STRIP_SET_ */