Inventor/nodes/SoVertexShape.h

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/*=======================================================================
** Author      : Paul S. Strauss (MMM yyyy)
**=======================================================================*/
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/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/


#ifndef  _SO_VERTEX_SHAPE_
#define  _SO_VERTEX_SHAPE_

#include <Inventor/nodes/SoShape.h>
#include <Inventor/nodes/SoVertexProperty.h>
#include <Inventor/fields/SoSFNode.h>
#include <Inventor/threads/SbThreadSpinlock.h>
#include <Inventor/elements/SoNormalBindingElement.h>
#include <Inventor/elements/SoTangentBindingElement.h>
#include <Inventor/STL/map>
#include <Inventor/SbPImpl.h>
#include <Inventor/nodes/SoVertexShader.h>

//
//  Class: SoVertexShape
//
//  Abstract vertex-based shape node class. All nodes derived from
//  this class are shapes that are constructed from vertices at some
//  or all of the current coordinates.  They all have vertexProperty nodes,
//  and vpCaches.
//

class SoGLRenderAction;
class SoNormalBundle;
class SoNormalCache;
class SoTangentBundle;
class SoTangentCache;
class SoShapeStyleElement;
class SoState;
class SoTextureCoordinateBundle;
class SoTextureCoordinate3Bundle;
class SiCoordinateGetter;

SO_PIMPL_PUBLIC_DECLARATION( SoVertexShape )

class SoVertexAttribData;

#ifdef _MSC_VER
#pragma warning( push )
#pragma warning(disable:4251)
#endif

class  SoVertexShape : public SoShape {

  SO_NODE_ABSTRACT_HEADER(SoVertexShape);
  SO_PIMPL_PUBLIC_HEADER(SoVertexShape)

 public:
  SoSFNode vertexProperty;

  SoNormalCache *getNormalCache() const;

  SoTangentCache* getTangentCache() const;

 private:

  // Subclasses may define this method to generate normals to use
  // when the normal binding is DEFAULT and there aren't enough
  // normals in the state. This should use the given SoNormalBundle
  // to generate the normals. Returns TRUE if normals were generated.
  virtual void      generateDefaultNormals(SoState *state, 
                                   const SbVec3f *coords, 
                                   int numCoords, 
                                   SoNormalBundle *nb,
                                   SbBool storeRef = FALSE);

  //Common function for normal generation
  void commonGenerateDefaultNormals(SoState *state, SoNormalBundle *nb);

  virtual SbBool figureNormals(SoState *state, SoNormalBundle *nb);

  virtual void generateDefaultTangents( SoState* state,
                                        const SbVec3f* coords,
                                        int numCoords,
                                        SoTangentBundle* tb,
                                        SbBool storeRef = FALSE );

  // Common function for tangent generation
  void commonGenerateDefaultTangents( SoState* state, SoTangentBundle* tb );

  virtual SbBool figureTangents( SoState* state, SoTangentBundle* tb );

  virtual void        write(SoWriteAction *writeAction);

  // Implements actions
  virtual void        GLRender(SoGLRenderAction *action);

 private:
  static void         initClass();
  static void         exitClass();

  // Redefines this to invalidate normal cache
  virtual void        notify(SoNotList *list);

  const SiCoordinateGetter* getCoordinateGetter(const SoState* state, bool ignoreProjectionElementDepth = false);

 private:
  // Constructor - makes this abstract
  SoVertexShape();

  virtual ~SoVertexShape();
    
  // Returns TRUE if the shape should be rendered. 
  // Checks for transparency in vertexProperty node before invoking
  // render action.
  virtual SbBool      shouldGLRender(SoGLRenderAction *action,
                                     SbBool isPointsOrLines = FALSE);
    
  

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

  //------------------ Following result of glRender() factorization GT (Sep 2007) 
  
  // sometimes used in shapes
  virtual void setupRenderFunctions(SoState *state,int &stateFlag);

  virtual void callSetupIndices(SoState* state, const SoShapeStyleElement* shapeStyle,uint32_t useTexCoordsAnyway);

  // check texture coordinates generation
  virtual void shouldGenerateTextureCoordinates(SoGLRenderAction *action,
                                                int &stateFlag,
                                                SoShapeStyleElement *&shapeStyle,
                                                uint32_t &useTexCoordsAnyway,
                                                SoTextureCoordinateBundle *&tcb,
                                                SoTextureCoordinate3Bundle *&tc3b);

  // check texture 3D coordinates generation
  virtual SbBool shouldGenerateTexture3DCoordinates(){return FALSE;}

  // check auto caching
  virtual void checkAutoCaching(SoGLRenderAction* action, const SoShapeStyleElement* shapeStyle, SbBool settingVPCache);

  // check 3D tex coords
  virtual SbBool checkTex3Coords(){return FALSE;}

  // actual rendering
  virtual void doRendering(SoGLRenderAction *action, const SoShapeStyleElement* shapeStyle);

  // rendering
  virtual void render(SoGLRenderAction *action,SbBool isPointsOrLines);

  // check normal generation
  virtual void shouldGenerateNormals(SoGLRenderAction *action,const SoShapeStyleElement *shapeStyle);

  // check tangent generation
  virtual void shouldGenerateTangents( SoGLRenderAction* action, const SoShapeStyleElement* shapeStyle );

  //Whether to check or not shapeHints
  virtual SbBool shouldCheckShapeHints(){ return FALSE;}

  virtual SbBool shapeHintsTest( SoState *state = NULL );
  
  // check shape hints
  virtual SbBool checkShapeHints(SoGLRenderAction *action);

  // setup lazy element
  virtual void setupLazyElement(SoGLRenderAction *action,const SoShapeStyleElement *shapeStyle);

  // check shape style
  virtual void checkShapeStyle(SoState *state,const SoShapeStyleElement *shapeStyle);

  // Internal routines used to allocate sequential indices so the
  // same rendering loops can be used for indexed or non-indexed
  // cases:
  static int32_t* allocateSequential(const int howMany);
  static int32_t* getConsecutiveIndices();

  virtual bool hasGeneratePrimitiveCache()
  {
    return false;
  }

private:
  void commonConstructor();

    void setupColorMaterial(SoState* state);
};

inline void 
SoVertexShape::generateDefaultNormals(SoState *, const SbVec3f *, int , SoNormalBundle *, SbBool )
{}

inline void
SoVertexShape::generateDefaultTangents( SoState*, const SbVec3f*, int, SoTangentBundle*, SbBool )
{}

inline void 
SoVertexShape::setupRenderFunctions(SoState *,int &)
{}

inline void 
SoVertexShape::callSetupIndices(SoState*, const SoShapeStyleElement* ,uint32_t )
{}

inline void 
SoVertexShape::doRendering(SoGLRenderAction *, const SoShapeStyleElement* )
{}


#ifdef _MSC_VER
#pragma warning( pop )
#endif

#endif /* _SO_VERTEX_SHAPE_ */

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Open Inventor Toolkit reference manual, generated on 15 Mar 2023
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