SoLightAttenuationElement.h

/*=======================================================================
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**=======================================================================*/
/*=======================================================================
** Author      : Paul S. Strauss (MMM yyyy)
**=======================================================================*/
/*=======================================================================
 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
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 ***                        BORDEAUX, FRANCE                                        ***
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef  _SO_LIGHT_ATTENUATION_ELEMENT
#define  _SO_LIGHT_ATTENUATION_ELEMENT
 
#include <Inventor/SbLinear.h>
#include <Inventor/SoPreferences.h>
#include <Inventor/elements/SoReplacedElement.h>

 
SoEXTENDER_Documented class  SoLightAttenuationElement : public SoReplacedElement {
 
  SO_ELEMENT_HEADER(SoLightAttenuationElement);
 
 public:
  static void         set(SoState *state, SoNode *node,
                          const SbVec3f &attenuation);

  static const SbVec3f & get(SoState *state);

  static SbVec3f      getDefault()            { return SoPreferences::getVec3f ("OIV_LIGHT_ATTENUATION", SbVec3f(0., 0., 1.)); }

  virtual void        print(FILE *fp) const;
 
private:

  virtual void init(SoState *state);

  virtual SoElement* copyMatchInfo() const;

  virtual SbBool matches(const SoElement* elt) const;
 
 private:
  // Initializes the SoLightAttenuationElement class
  static void         initClass();
  static void         exitClass();
 
 private:
  SbVec3f             attenuation;
 
  virtual ~SoLightAttenuationElement();
};
 
#endif /* _SO_LIGHT_ATTENUATION_ELEMENT */