SoLightElement.h

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**=======================================================================*/
/*=======================================================================
** Author      : R. ALBOU (Feb 1997)
**=======================================================================*/
 
#ifndef  _SO_LIGHT_ELEMENT_
#define  _SO_LIGHT_ELEMENT_
 
/* include files */
#include <Inventor/SoLists.h>
#include <Inventor/elements/SoAccumulatedElement.h>
#include <Inventor/SbMatrix.h>
 
#include <Inventor/STL/vector>
 
class SoLight;
 
SoEXTENDER_Documented class  SoLightElement : public SoAccumulatedElement {
  SO_ELEMENT_HEADER(SoLightElement) ;
 
 public:
  static void add(SoState *state, SoLight *light, const SbMatrix &WCToVRCMatrix) ;
 
  virtual void push(SoState *state) ;
 
  static const SoNodeList& getLights(SoState *state) ;
 
  static const SbMatrix& getMatrix(SoState *state, int index) ;
 
  virtual void pop(SoState* state, const SoElement* prevTopElement);
 
private:
 
  virtual void init(SoState *state);
 
 private:
  typedef std::vector<SoLight*> LightList;
 
  // Initializes the SoLightElement class
  static void initClass() ;
  static void exitClass() ;
 
  static void getLights(SoState *state, LightList& lightList);
 
  void getLights( LightList& lightList ) const;
 
  static void getMatrix(SoState *state, SoLight* light, SbMatrix& model, SbMatrix& view);
 
 private:
  virtual SbBool matches(const SoElement* elt) const;
 
  virtual SoElement* copyMatchInfo() const;
 
  // list of light nodes
  SoNodeList m_lights ;
 
  // List of transform matrix from world coordinates to view reference coordinates
  std::vector<SbMatrix> m_WCToVRCMatrix;
  int        m_startIndex;
 
  std::vector<SbMatrix> m_viewMatrix;
 
  virtual ~SoLightElement() ;
} ;
/*----------------------------------------------------------------------------*/
 
#endif // _SO_LIGHT_ELEMENT_