SbPlaneProjector.h

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**=======================================================================*/
/*=======================================================================
** Author      : Howard Look (MMM yyyy)
** Modified by : Paul Isaacs (MMM yyyy)
**=======================================================================*/
/*=======================================================================
 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef _SB_PLANE_PROJECTOR_
#define _SB_PLANE_PROJECTOR_
 
#include <Inventor/projectors/SbProjector.h>
 
class  SbPlaneProjector : public SbProjector
{
 public:
  
  SbPlaneProjector(SbBool orient = FALSE);
    
  SbPlaneProjector(const SbPlane &plane,
                   SbBool orient = FALSE);
 
  virtual ~SbPlaneProjector() {};
 
  virtual SbProjector *    copy() const;
  virtual SbVec3f     project(const SbVec2f &point);
  virtual SbVec3f intersect( const SbLine &line );
 
  void                setPlane(const SbPlane &plane);
 
  const SbPlane &     getPlane() const                  { return plane; }
 
  void                setOrientToEye(SbBool orientToEye);
  SbBool              isOrientToEye() const           { return orientToEye; }
 
  virtual SbVec3f     getVector(const SbVec2f &mousePosition1,
                                const SbVec2f &mousePosition2);
                                            
  virtual SbVec3f     getVector(const SbVec2f &mousePosition);
                                            
  void                setStartPosition(const SbVec2f &mousePosition)
    { lastPoint = project(mousePosition); }
 
  void                setStartPosition(const SbVec3f &point)
    { lastPoint = point; }
 private:
 
  SbPlane     plane;
  SbBool      orientToEye;    // TRUE is plane should be oriented to eye.
  SbBool      needSetup;      // Set TRUE when plane or orientToEye changes.
  SbPlane     nonOrientPlane; // Non-EyeOriented plane.
 
  SbVec3f     lastPoint;      // Cached last point.
 
  void        setupPlane();   // Sets up plane orientation, if necessary.
 
};
 
#endif /* _SB_PLANE_PROJECTOR_ */