SoTextureMatrixElement.h

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**=======================================================================*/
/*=======================================================================
** Author      : Gavin Bell (MMM yyyy)
**=======================================================================*/
/*=======================================================================
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef  _SO_TEXTURE_MATRIX_ELEMENT
#define  _SO_TEXTURE_MATRIX_ELEMENT
 
#include <Inventor/SbLinear.h>
#include <Inventor/elements/SoAccumulatedElement.h>
#include <Inventor/STL/vector>
 
SoEXTENDER_Documented class  SoTextureMatrixElement : public SoAccumulatedElement {
  
  SO_ELEMENT_HEADER(SoTextureMatrixElement);
  
 public:
 virtual void        push(SoState *state);
    
  static void         makeIdentity(SoState *state, SoNode *node);
    
 
  static void         set(SoState *state, SoNode *node, const SbMatrix &matrix);
 
  static void         mult(SoState *state, SoNode *node,
                           const SbMatrix &matrix);
    
  static void         translateBy(SoState *state, SoNode *node,
                                  const SbVec3f &translation);
 
  static void         rotateBy(SoState *state, SoNode *node,
                               const SbRotation &rotation);
 
  static void         scaleBy(SoState *state, SoNode *node,
                              const SbVec3f &scaleFactor);
    
  static const SbMatrix &     get(SoState *state, int unit=0);
    
  virtual void        print(FILE *fp) const;
 
private:
 
  virtual void commonInit();
 
  virtual void init(SoState *state);
 
 private:
  // Initializes the SoTextureMatrixElement class
  static void initClass();
  static void exitClass();
  static void emptyMatrix(SoState *state);
 
 private:
  // Sets the matrix in an instance to identity
  virtual void        makeEltIdentity(int unit=0);
    
  // Multiplies into the matrix in an instance
  virtual void        multElt(const SbMatrix &matrix, int unit=0);
    
  // Each of these performs the appropriate operation on the matrix
  // in an instance
  virtual void        translateEltBy(const SbVec3f &translation, int unit=0);
  virtual void        rotateEltBy(const SbRotation &translation, int unit=0);
  virtual void        scaleEltBy(const SbVec3f &scaleFactor, int unit=0);
    
  // Sets the matrix in an instance to given matrix
  virtual void        setElt(const SbMatrix &matrix, int unit);
 
  // Gets the matrix from an instance
  virtual const SbMatrix &    getElt(int unit=0) const;
    
  virtual ~SoTextureMatrixElement();
 
  // return texture matrix for the given texture unit
  SbMatrix& getTexMatrix(const int unit) const;
 
private:
  // This stores the list of node id's as pointers associated to
  // each texture unit.
  typedef std::vector<SbMatrix> SbMatrixList;
  mutable SbMatrixList m_textureMatrixList;
};
 
#endif /* _SO_TEXTURE_MATRIX_ELEMENT */