SoPointSet.h

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/*=======================================================================
** Author      : Paul S. Strauss (MMM yyyy)
**=======================================================================*/
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef  _SO_POINT_SET_
#define  _SO_POINT_SET_
 
#include <Inventor/fields/SoSFInt32.h>
#include <Inventor/nodes/SoNonIndexedShape.h>
#include <Inventor/SbPImpl.h>
 
class SoState;
class SoTextureCoordinateBundle;
class SoTextureCoordinate3Bundle;
 
SO_PIMPL_PUBLIC_DECLARATION(SoPointSet)
 
 
//
//  Class: SoPointSet
//
//  Set of points, using the current coordinates. The startIndex field
//  gives the starting coordinate index for the first point. The number of
//  points to draw is determined by the numPoints field.
//
 
// This value, when used in the numPoints field, means use the rest of
// the coordinates as points
#define SO_POINT_SET_USE_REST_OF_POINTS (-1)
 
class  SoPointSet : public SoNonIndexedShape
{
  SO_NODE_HEADER(SoPointSet);
  SO_PIMPL_PUBLIC_HEADER(SoPointSet)
 
public:
  SoSFInt32 numPoints;
 
  SoPointSet();
 
private:
  virtual void GLRender( SoGLRenderAction* action );
 
  virtual void getBoundingBox( SoGetBoundingBoxAction* action );
 
  virtual void getPrimitiveCount( SoGetPrimitiveCountAction* action );
 
  // Computes bounding box
  virtual void computeBBox( SoAction* action, SbBox3f& box, SbVec3f& center );
 
private:
  
  static void initClass();
  static void exitClass();
  
  // return num vertices
  virtual int getNumVert( SoState* state = NULL );
 
  virtual void notify( SoNotList* list );
 
  //return number of primitives
  virtual int getNumPrim( SoState* state = NULL );
 
private:
  // Generates points representing point set
  virtual void generatePrimitives( SoAction* action );
 
  // check if normal should be generated or not.
  virtual void shouldGenerateNormals( SoGLRenderAction* action, const SoShapeStyleElement *shapeStyle );
 
  // No tangent generation
  virtual void shouldGenerateTangents( SoGLRenderAction* /*action*/, const SoShapeStyleElement* /*shapeStyle*/ ) {}
 
  // check if glrender should be called
  virtual SbBool shouldGLRender( SoGLRenderAction* action, SbBool isPointsOrLines = FALSE );
 
  //Free memory
  virtual void exitRender( SoState* state,
                           int stateFlag,
                           SoTextureCoordinateBundle* tcb,
                           SoTextureCoordinate3Bundle* tc3b );
 
  // count the number of primitives in the shape
  virtual void countPrim( SoState* state = NULL );
 
  // really do the rendering part
  virtual void doRendering( SoGLRenderAction* action, const SoShapeStyleElement* shapeStyle );
 
  // says that rendering is PointOrLine
  virtual SbBool isRenderingPointsOrLines( SoGLRenderAction* action );
 
  // Overrides standard method to create an SoPointDetail instance
  virtual SoDetail* createPointDetail( SoRayPickAction* action,
                                       const SoPrimitiveVertex* v,
                                       SoPickedPoint* pp);
 
  virtual ~SoPointSet();
 
};
 
inline SbBool 
SoPointSet::isRenderingPointsOrLines( SoGLRenderAction * )
{
  return TRUE;
}
 
#endif /* _SO_POINT_SET_ */