SoShapeHintsElement.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_SHAPE_HINTS_ELEMENT
#define  _SO_SHAPE_HINTS_ELEMENT
 
#include <Inventor/elements/SoReplacedElement.h>
 
SoEXTENDER_Documented class  SoShapeHintsElement : public SoElement {
 
  SO_ELEMENT_HEADER(SoShapeHintsElement);
 
 public:
 enum VertexOrdering {
 UNKNOWN_ORDERING,
 CLOCKWISE,
 COUNTERCLOCKWISE,
 ORDERING_AS_IS
  };
 enum ShapeType {
 UNKNOWN_SHAPE_TYPE,
 SOLID,
 SHAPE_TYPE_AS_IS  };
 
 enum FaceType {
 UNKNOWN_FACE_TYPE,
 CONVEX,
 FACE_TYPE_AS_IS
  };
 
 enum WindingType {
    NO_WINDING_TYPE,
    ODD_TYPE,
    NON_ZERO_TYPE,
    POSITIVE_TYPE,
    NEGATIVE_TYPE,
    ABS_GEQ_TWO_TYPE
  };
 
  static void         set(SoState *state, VertexOrdering vertexOrdering,
                          ShapeType shapeType, FaceType faceType);
 
  static void         set(SoState *state, WindingType windingType);
 
  static void         set(SoState *state, SbBool useVBO) ;
 
  static void set(SoState *state, VertexOrdering vertexOrdering, ShapeType shapeType, FaceType faceType,
                  WindingType windingType, SbBool useVBO);
 
  static void         set(SoState *state, SoNode *,
                          VertexOrdering vertexOrdering,
                          ShapeType shapeType, FaceType faceType)
    { set(state, vertexOrdering, shapeType, faceType); }
 
  static void         set(SoState *state, SoNode *,WindingType windingType)
    { set(state,windingType); }
 
  static void         set(SoState *state, SoNode *, SbBool useVBO)
    { set(state,useVBO); }
 
  static void         get(SoState *state,
                          VertexOrdering &vertexOrdering,
                          ShapeType &shapeType, FaceType &faceType);
 
  static void         get(SoState *state, WindingType &windingType );
 
  static SbBool       isVBOUsed(SoState *state) ;
 
  static VertexOrdering getDefaultVertexOrdering()
  {
    return s_vertexOrderingDefault;
  }
  static ShapeType      getDefaultShapeType()
  {
    return s_shapeTypeDefault;
  }
  static FaceType       getDefaultFaceType()
  {
    return s_faceTypeDefault;
  }
  static WindingType    getDefaultWindingType()
  {
    return s_windingTypeDefault;
  }
  static SbBool         getDefaultVBOUsage()
  {
    return true;
  }
 
  virtual void        push(SoState *state);
 
  virtual void        print(FILE *fp) const;
 
private:
 
  virtual void init(SoState *state);
 
  virtual SbBool matches(const SoElement* elt) const;
 
  virtual SoElement* copyMatchInfo() const;
 
 private:
  // Initializes the SoShapeHintsElement class
  static void         initClass();
  static void         exitClass();
 
  static bool isTwoSidedLighting(SoState *state);
  static void setForceTwoSidedLighting( SoState* state, bool forceTwoSidedLighting );
 
  static bool isCulling(SoState *state);
 
  bool isCulling() const;
 
  static bool isCulling( VertexOrdering vertexOrdering, ShapeType shapeType );
 
  static bool isCounterClockwise(SoState *state);
 
  bool isCounterClockwise() const;
 
private:
  virtual void commonInit();
 
  // Virtual set methods that subclasses can override.
  virtual void setElt(VertexOrdering vertexOrdering, ShapeType shapeType, FaceType faceType);
 
  virtual void setElt(WindingType windingType);
 
  // Set shape hints by defining all options.
  virtual void setElt(VertexOrdering vertexOrdering, ShapeType shapeType, FaceType faceType,
                      WindingType windingType, SbBool useVBO);
 
  VertexOrdering      vertexOrdering;
  ShapeType           shapeType;
  FaceType            faceType;
  WindingType         windingType;
  SbBool              useVBO ;
 
  virtual ~SoShapeHintsElement();
 
private:
  bool isTwoSidedLighting() const;
 
  bool m_forceTwoSidedLighting;
 
  static void initVertexOrdering();
  static void initShapeType();
  static void initFaceType();
  static void initWindingType();
 
  static VertexOrdering      s_vertexOrderingDefault;
  static ShapeType           s_shapeTypeDefault;
  static FaceType            s_faceTypeDefault;
  static WindingType         s_windingTypeDefault;
};
 
#endif /* _SO_SHAPE_HINTS_ELEMENT */