Inventor/elements/SoShapeHintsElement.h

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/*=======================================================================
** Author      : Paul S. Strauss (MMM yyyy)
**=======================================================================*/
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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 */

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Open Inventor Toolkit reference manual, generated on 15 Mar 2023
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