SoIndexedLineSet.h

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/*=======================================================================
** Author      : Paul S. Strauss (MMM yyyy)
** Modified by : Nick Thompson (MMM yyyy)
**=======================================================================*/
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**=======================================================================*/
/*=======================================================================
** Modified by : David Beilloin (Mar 2010)
**=======================================================================*/
 
 
#ifndef  _SO_INDEXED_LINE_SET_
#define  _SO_INDEXED_LINE_SET_
 
#include <Inventor/nodes/SoIndexedShape.h>
#include <Inventor/SbPImpl.h>
 
class SoState;
class SoTangentBundle;
 
SO_PIMPL_PUBLIC_DECLARATION(SoIndexedLineSet)
 
 
//
//  Class: SoIndexedLineSet
//
//  Indexed set of (poly)lines. Each line consists of 2 or more
//  vertices, each of which is denoted by an integer index (from the
//  coordIndex field) into the current coordinates. Depending on the
//  current material, normal and tangent binding values, the materials,
//  normals and tangents for the lines or vertices may be accessed in order or
//  indexed. If they are indexed, the materialIndex, normalIndex and tangentIndex
//  fields are used. Texture coordinates may also be indexed, using
//  the textureCoordIndex field.  
//
 
// This coordinate index indicates that the current line ends and the
// next line begins
#define SO_END_LINE_INDEX       (-1)
 
class  SoIndexedLineSet : public SoIndexedShape
{
  SO_NODE_HEADER(SoIndexedLineSet);
  SO_PIMPL_PUBLIC_HEADER(SoIndexedLineSet)
 
public:
  // Inherits all fields
 
  SoIndexedLineSet();
 
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:
 
  static void initClass();
  static void exitClass();
 
  // return num lines for test  
  virtual int getNumPrim( SoState* state = NULL );
 
private:
 
  // Generates line segments representing line set
  virtual void generatePrimitives( SoAction* action );
 
  // 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 );
 
  virtual void callSetupIndices( SoState* state, const SoShapeStyleElement* shapeStyle, uint32_t useTexCoordsAnyway );
 
  // says wether to generate normals
  virtual void shouldGenerateNormals( SoGLRenderAction* action,const SoShapeStyleElement* shapeStyle );
 
  // setup lazy element
  virtual void setupLazyElement(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 ~SoIndexedLineSet();
};
 
inline SbBool 
SoIndexedLineSet::isRenderingPointsOrLines( SoGLRenderAction* )
{
  return TRUE;
}
 
#endif /* _SO_INDEXED_LINE_SET_ */