SoEnvironmentElement.h

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**=======================================================================*/
/*=======================================================================
** Author      : R. ALBOU (Feb 1997)
**=======================================================================*/
 
#ifndef  _SO_ENVIRONMENT_ELEMENT_
#define  _SO_ENVIRONMENT_ELEMENT_
/* include files */
#include <Inventor/elements/SoReplacedElement.h>
#include <Inventor/SbColor.h>
 
/*----------------------------------------------------------------------------*/
SoEXTENDER_Documented class  SoEnvironmentElement : public SoReplacedElement {
  SO_ELEMENT_HEADER(SoEnvironmentElement) ;
 
 public:
 
  enum FogType {
    NONE,
    HAZE,
    FOG,
    SMOKE
  } ;
 
  struct  EnvironmentParameters {
    EnvironmentParameters();
 
    float     ambientIntensity;
    SbColor   ambientColor;
    SbVec3f   attenuation;
    SbBool    ambientOcclusion;
    FogType   fogType;
    SbColor   fogColor;
    float     fogStart;
    float     fogVisibility;
  };
 
  static void set(SoState *state, SoNode *node, const EnvironmentParameters& envParams) ;
 
  static void get(SoState *state, EnvironmentParameters& envParams) ;
 
  static float          getAmbientIntensity(SoState *state) ;
 
  static const SbColor& getAmbientColor(SoState *state) ;
 
  static const SbVec3f& getLightAttenuation(SoState *state) ;
 
  static const SbBool& getAmbientOcclusion(SoState *state);
 
  // Push copies the values from the previous element
  virtual void  push(SoState *state) ;
 
private:
 
  virtual void init(SoState *state);
 
  virtual SbBool matches(const SoElement* elt) const;
 
  virtual SoElement* copyMatchInfo() const;
  
 private:
  
  // Initializes the SoEnvironmentElement class
  static void initClass() ;
  static void exitClass() ;
 
private:
  float     m_ambientIntensity ;
  SbColor   m_ambientColor ;
  SbVec3f   m_attenuation ;
  SbBool    m_ambientOcclusion;
  FogType   m_fogType ;
  SbColor   m_fogColor ;
  float     m_fogStart ;
  float     m_fogVisibility ;
 
  virtual void setElt(const EnvironmentParameters& envParams) ;
 
  virtual ~SoEnvironmentElement() ;
 
} ;
 
/*----------------------------------------------------------------------------*/
 
#endif // _SO_ENVIRONMENT_ELEMENT_