SoLineSet.h

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/*=======================================================================
** Author      : Paul S. Strauss (MMM yyyy)
**=======================================================================*/
/*=======================================================================
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef  _SO_LINE_SET_
#define  _SO_LINE_SET_
 
#include <Inventor/fields/SoMFInt32.h>
#include <Inventor/nodes/SoNonIndexedShape.h>
#include <Inventor/SbPImpl.h>
 
class SoState;
class SoTextureCoordinateBundle;
class SoTextureCoordinate3Bundle;
class SoTangentBundle;
 
SO_PIMPL_PUBLIC_DECLARATION(SoLineSet)
 
 
//
//  Class: SoLineSet
//
//  Set of (poly)lines. Each line consists of 2 or more vertices,
//  taken in order from the current coordinates, which are joined to
//  form segments. The startIndex field gives the starting coordinate
//  index for the first line. If materials, normals or tangents are bound to
//  vertices, they will begin at that index, as well; otherwise, they
//  will start at index 0.  The number of vertices in each polyline is
//  determined by successive entries in the numVertices field.
//
 
 
// Deprecated feature; specifying USE_REST_OF_VERTICES as the last
// value in the numVertices field will use all the points in the
// coordinate array.
#define SO_LINE_SET_USE_REST_OF_VERTICES        (-1)
 
 
class  SoLineSet : public SoNonIndexedShape
{
  SO_NODE_HEADER(SoLineSet);
  SO_PIMPL_PUBLIC_HEADER(SoLineSet)
 
public:
  SoMFInt32 numVertices;
 
  SoLineSet();
 
private:
 
  virtual void GLRender( SoGLRenderAction* action );
 
  virtual void getBoundingBox( SoGetBoundingBoxAction* action );
 
  virtual void getPrimitiveCount( SoGetPrimitiveCountAction* action );
 
  virtual void generateDefaultTangents( SoState* state,
                                        const SbVec3f* coords,
                                        int numCoords,
                                        SoTangentBundle* tb,
                                        SbBool storeRef = FALSE );
private:
  
  inline int getNumPolyLines() const { return numVertices.getNum(); }
 
  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 line segments representing line set
  virtual void generatePrimitives( SoAction* action );
 
  // check if normal should be generated or not.
  virtual void shouldGenerateNormals( SoGLRenderAction* action, const SoShapeStyleElement* shapeStyle );
 
  // setup lazy element
  virtual void setupLazyElement(SoGLRenderAction *action, const SoShapeStyleElement *shapeStyle);
 
  //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 SoLineDetail instance
  virtual SoDetail* createLineSegmentDetail( SoRayPickAction* action,
                                             const SoPrimitiveVertex* v1,
                                             const SoPrimitiveVertex* v2,
                                             SoPickedPoint* pp );
 
  virtual ~SoLineSet();
 
};
 
inline SbBool 
SoLineSet::isRenderingPointsOrLines( SoGLRenderAction* )
{
  return TRUE;
}
 
#endif /* _SO_LINE_SET_ */