SoBufferedShape.h

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/*=======================================================================
** Author      : VSG (MMM YYYY)
**=======================================================================*/
#if !defined SOBUFFEREDSHAPE_H
#define SOBUFFEREDSHAPE_H
 
#include <Inventor/fields/SoSFEnum.h>
#include <Inventor/fields/SoMFEnum.h>
#include <Inventor/fields/SoSFInt32.h>
#include <Inventor/fields/SoMFInt32.h>
#include <Inventor/fields/SoSFShort.h>
#include <Inventor/fields/SoSFBox3f.h>
#include <Inventor/fields/SoSFBufferObject.h>
#include <Inventor/fields/SoMFBufferObject.h>
 
#include <Inventor/devices/SoCpuBufferObject.h>
#include <Inventor/devices/SoGLBufferObject.h>
 
#include <Inventor/nodes/SoShape.h>
 
#include <Inventor/elements/SoDrawStyleElement.h>
 
#include <Inventor/SbPImpl.h>
 
 
class SoGLBufferObject;
class SoAction;
 
SO_PIMPL_PUBLIC_DECLARATION(SoBufferedShape)
 
 
class  SoBufferedShape : public SoShape 
{
  SO_NODE_HEADER( SoBufferedShape );
  SO_PIMPL_PUBLIC_HEADER(SoBufferedShape)
 
  // ----------------------- Public usage --------------------------------------
 
public:
 
  enum Type
  {
    POINTS,
 
    LINE_STRIP,
 
    LINE_LOOP,
 
    LINES,
 
    TRIANGLE_STRIP,
 
    TRIANGLE_FAN,
 
    TRIANGLES,
 
    QUAD_STRIP,
 
    QUADS,
 
    POLYGON
  };
 
  enum Usage
  {
    STATIC,
    DYNAMIC
  };
 
  SoBufferedShape();
 
  SoSFEnum shapeUsage;
 
  SoSFBool primitiveRestartEnabled;
 
  SoSFInt32 primitiveRestartValue;
 
  SoSFBool useNormalsGenerator;
 
  SoSFEnum shapeType;
 
  SoMFInt32 numVertices;
 
  SoSFBufferObject vertexBuffer;
 
  SoSFShort vertexComponentsCount;
 
  SoSFEnum vertexComponentsType;
 
  SoSFShort vertexStride;
 
  SoSFInt32 vertexOffset;
 
  SoSFBufferObject normalBuffer;
 
  SoSFEnum normalComponentsType;
 
  SoSFShort normalStride;
 
  SoSFInt32 normalOffset;
 
  SoSFBufferObject indexBuffer;
 
  SoSFEnum indexType;
 
  SoSFInt32 indexOffset;
 
  SoSFBufferObject colorBuffer;
 
  SoSFEnum colorComponentsType;
 
  SoSFInt32 colorStride;
 
  SoSFInt32 colorOffset;
 
  SoSFInt32 colorComponentsCount;
 
  SoMFBufferObject texCoordsBuffer;
 
  SoMFEnum texCoordsComponentsType;
 
  SoMFInt32 texCoordsStride;
 
  SoMFInt32 texCoordsOffset;
 
  SoMFInt32 texCoordsComponentsCount;
 
private:
  virtual void GLRender(SoGLRenderAction *action );
 
  virtual void getBoundingBox( SoGetBoundingBoxAction *action );
 
  virtual void computeBBox( SoAction *action, SbBox3f &box, SbVec3f &center );
 
  virtual void computeBBox(SoAction *action, SbXfBox3d &box, SbVec3d &center);
 
  virtual void rayPick(SoRayPickAction *action );
 
  virtual void getPrimitiveCount(SoGetPrimitiveCountAction *action );
 
// ----------------------- Private usage -------------------------------------
// INTERNAL 
private:
 
  static void initClass();
 
  static void exitClass();
 
  void notify( SoNotList* list );
 
  int getNumPrim( SoState* state = NULL );
 
  // ----------------------- Protected usage -------------------------------------
 
private:
 
  virtual ~SoBufferedShape();
 
  virtual SbBool shouldCheckShapeHints();
 
  virtual SbBool shouldGLRender( SoGLRenderAction *action, SbBool isPointsOrLines = FALSE );
 
  virtual SbBool isLightingUsable( const void* normalBufferPtr );
 
  virtual SbBool isTransparent(SoState* state) const;
 
  virtual void generatePrimitives( SoAction *action );
 
 
  virtual void GLRenderBoundingBox( SoGLRenderAction *action );
 
  // 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 SoDetail* createLineSegmentDetail( SoRayPickAction *action,
                                             const SoPrimitiveVertex *v1,
                                             const SoPrimitiveVertex *v2,
                                             SoPickedPoint *pp );
 
  virtual SoDetail* createPointDetail( SoRayPickAction *action,
                                       const SoPrimitiveVertex *v,
                                       SoPickedPoint *pp );
 
  //Transforms the polygons into lines before rendering them.
  //It can be used if :
  //- shapeStyle = TRIANGLE, TRIANGLE_STRIP, TRIANGLE_FAN, TRIANGLES, QUAD_STRIP, QUADS or POLYGON
  //- SoDrawStyle::style = LINES
  // ----------------------- Private usage -------------------------------------
private:
  void commonConstructor();
 
  unsigned int computeSmallestBatchSize(const SoNodeList* vertexAttribsList, unsigned int numInstances);
 
  //In some cases primitives need to be transformed to POINTS to have a correct rendering
  //with POINTS as drawStyle.
  bool arePointsNeededAsPrimitives( SoDrawStyleElement::Style drawStyle ) const;
 
  template< class T > void computeBBoxTemplate_POINTS( SoAction *action, SbBox3f &box, SbVec3f &center );
 
  template< class T > void computeBBoxTemplate( SoAction *action, SbBox3f &box, SbVec3f &center, const SbVec2d &psize );
 
  template< class T > void computeBBoxTemplateSP( SoAction *action, SbBox3f &box, SbVec3f &center, const SbVec2d &psize );
 
  template< class T, int MODE > void computeBBoxTemplate_( SoAction *, SbBox3f &box, SbVec3f &center, const SbVec2d &pSize );
  
  //A GL context must exist to use this method.
  bool isRenderExtraDataNeededInCurrentContext() const;
 
  //A GL context must exist to use this method.
  bool isRenderExtraDataNeededByGraphicCardInCurrentContext() const;
 
  //For some shapeType values, the render extra data process must be launched ( without considering
  //OIV_SHAPES_PRIMITIVES_OPTIM ) in order to have a correct rendering with LINES as drawStyle.
  bool isRenderExtraDataNeededByShapeType() const;
 
  //Some graphic cards has bad performance when glPolygonMode is used to render the
  //shape with LINES as draw style.
  //
  //Returns true if the polygons must be transformed in lines before rendering them.
  static bool isRenderExtraDataNeededByGraphicCard( const SbString& graphicCardName );
};
 
//------------------------------------------------------------------------------
 
#endif // SOBUFFEREDSHAPE_H