SoTextureCoordinate3Element.h

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**=======================================================================*/
/*=======================================================================
** Author      : Patrick Vigneras (Nov 1999)
**=======================================================================*/
 
#ifndef  _SO_TEXTURE_COORDINATE3_ELEMENT
#define  _SO_TEXTURE_COORDINATE3_ELEMENT
 
#include <Inventor/SbLinear.h>
#include <Inventor/elements/SoReplacedTextureElement.h>
#include <Inventor/STL/vector>
 
typedef const SbVec4f &
SoTextureCoordinate3FunctionCB(void *userdata, const SbVec3f &point,
                               const SbVec3f &normal);
 
class SoTextureCoordinateElement;
 
SoEXTENDER_Documented class  SoTextureCoordinate3Element : public SoReplacedTextureElement {
 
  SO_ELEMENT_HEADER(SoTextureCoordinate3Element);
 
public:
 enum CoordType {
    EXPLICIT = 1,   // Coordinates stored in state
    FUNCTION = 2    // Coordinates generated by software function
  };
 
  static void         setDefault(SoState *state, SoNode *node);
 
  // FUNCTION:
  static void         setFunction(SoState *state, SoNode *node,
                                  SoTextureCoordinate3FunctionCB *func,
                                  void *userData,
                                  SbBool frcSend = FALSE);
  
  // EXPLICIT:
  static void         set3(SoState *state, SoNode *node,
                           int32_t numCoords, const SbVec3f *coords,
                           SbBool frcSend = FALSE);
 
  static void         set4(SoState *state, SoNode *node,
                           int32_t numCoords, const SbVec4f *coords,                                                
                           SbBool frcSend = FALSE);
 
  static CoordType    getType(SoState *state, int unit=0);
 
  virtual CoordType   getType(int unit=0) const;
 
  static const SoTextureCoordinate3Element * getInstance(SoState *state);
 
  // Get routine for FUNCTION case:
 
  const SbVec4f &     get(const SbVec3f &point, const SbVec3f &normal,
                          int unit=0) const;
 
  // Get routines for EXPLICIT case:
 
  int32_t             getNum(int unit=0) const ;
 
  SbBool              is3D(int unit=0) const ;
 
  SbBool              isForceSending(int unit=0) const ;
 
  const SbVec3f &     get3(int index, int unit=0) const;
  const SbVec4f &     get4(int index, int unit=0) const;
 
  virtual void        print(FILE *fp) const;
 
  virtual void push(SoState *) ;
 
private:
 
  virtual void commonInit();
 
  virtual void init(SoState *state);
 
 private:
  // Initializes the SoTextureCoordinate3Element class
  static void         initClass();
  static void         exitClass();
 
  struct SoTexCoord3Data {
    SoTexCoord3Data()
      :whatKind(EXPLICIT),
       numCoords(0),coords3(NULL),coords4(NULL),coordsAre3D(FALSE),forceSend(FALSE)
      {}
 
 
    SoTexCoord3Data& operator=(const SoTexCoord3Data& data)
      {
        whatKind = data.whatKind ;
        numCoords = data.numCoords ;
        coords3 = data.coords3 ;
        coords4 = data.coords4 ;
        coordsAre3D = data.coordsAre3D ;
        forceSend = data.forceSend;
        return *this ;
      }
 
    // members
    // What kind of coordinates will be done:
    CoordType           whatKind;
 
    // Storage for EXPLICIT:
    int32_t             numCoords;
    const SbVec3f       *coords3;
    const SbVec4f       *coords4;
    SbBool              coordsAre3D;
    SbBool              forceSend;
  } ;
  SoTexCoord3Data& getData(const size_t unit) const;
 
private:
 
  virtual ~SoTextureCoordinate3Element();
 
private:
  void checkSize(const size_t size) const;
  //Needed for get method which doesn't have state we need
  SoState* m_state;
  mutable std::vector<SoTexCoord3Data> m_texCoord3Data ;
 
 
  SbVec3f             convert3;       // To convert from 4-D to 3-D
  SbVec4f             convert4;       // To convert from 3-D to 4-D
};
 
#endif /* _SO_TEXTURE_COORDINATE3_ELEMENT */