SoProjectionMatrixElement.h

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**=======================================================================*/
/*=======================================================================
** Author      : Paul S. Strauss (MMM yyyy)
**=======================================================================*/
/*=======================================================================
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef  _SO_PROJECTION_MATRIX_ELEMENT
#define  _SO_PROJECTION_MATRIX_ELEMENT
 
#include <Inventor/SbLinear.h>
#include <Inventor/elements/SoReplacedElement.h>

 
SoEXTENDER_Documented class  SoProjectionMatrixElement : public SoReplacedElement
{
  SO_ELEMENT_HEADER(SoProjectionMatrixElement);
 
public:

  static void set(SoState *state, SoNode *node, const SbMatrix &matrix);

  static const SbMatrix& get(SoState *state);

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

  virtual void init(SoState *state);

  virtual SbBool matches(const SoElement* elt) const;

  virtual SoElement* copyMatchInfo() const;
 
private:
  // Initializes the SoProjectionMatrixElement class
  static void initClass();
  static void exitClass();

  static void setJitter(SoState *state, SoNode *node, const SbMatrix &matrix, const SbVec3f& jitterVector);
  static const SbVec3f& getJitter(SoState *state);
 
private:
  SbMatrix            projectionMatrix;
 
  // Sets the matrix in an instance
  virtual void setElt(const SbMatrix &matrix);
 
  virtual ~SoProjectionMatrixElement();
 
private:
  SbVec3f m_jitterVector;
};
 
#endif /* _SO_PROJECTION_MATRIX_ELEMENT */