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>
#include <Inventor/SbPImpl.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 SoNormalBundle;
class SoState;
class SoVolumeFaceSet;
class IShapeVrtxImpl2ShapeVrtxAPI;

SO_PIMPL_PUBLIC_DECLARATION(SoFaceSet)


class  SoFaceSet : public SoNonIndexedShape
{
  SO_NODE_HEADER(SoFaceSet);
  SO_PIMPL_PUBLIC_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 );

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

private:

  static void  initClass();
  static void  exitClass();

  virtual int getNumVert( SoState* state = NULL );

  virtual int getNumPrim( SoState* state = NULL );

private:

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

  //Test function
  virtual SbBool shapeHintsTest( SoState* state = NULL );

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

  virtual void countPrim( SoState* state = NULL );

  // 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();

  //When tesselating complex polygons, keep the result cached
  virtual bool hasGeneratePrimitiveCache()
  {
    return true;
  }

private:

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

private:

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

  void commonConstructor();

};

#endif /* _SO_FACE_SET_ */

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Open Inventor Toolkit reference manual, generated on 15 Mar 2023
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