SbSphereSheetProjector.h

/*=======================================================================
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**=======================================================================*/
/*=======================================================================
** Author      : Howard Look (MMM yyyy)
** Modified by : Gavin Bell (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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 ***                        BORDEAUX, FRANCE                                        ***
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef _SB_SPHERE_SHEET_PROJECTOR_
#define _SB_SPHERE_SHEET_PROJECTOR_
 
#include <Inventor/projectors/SbSphereProjector.h>
 
class  SbSphereSheetProjector : public SbSphereProjector
{
 public:
  SbSphereSheetProjector(SbBool orientToEye = TRUE);
 
  SbSphereSheetProjector(const SbSphere &sph,
                         SbBool orientToEye = TRUE);
 
  ~SbSphereSheetProjector() {}
  virtual SbProjector *    copy() const;
  virtual SbVec3f     project(const SbVec2f &point);
  virtual SbVec3f intersect( const SbLine &line );
  virtual SbRotation  getRotation(const SbVec3f &point1,
                                  const SbVec3f &point2);
 
 private:
  // Sets up the plane use to project on to.
  // If projecting from a point, call with no parameters.
  // If intersecting a line, pass the line in *working space*.
  virtual void        setupPlane( const SbLine *line = NULL );
 
  // The projection point in working space.
  SbVec3f             workingProjPoint;
    
  // Information about the plane used for intersection testing.
  SbVec3f     planePoint;             // point on plane
  SbVec3f     planeDir;               // normal direction
  float       planeDist;              // distance from sphere center
  SbPlane     tolPlane;               // the plane itself
 
};
 
#endif /* _SB_SPHERE_SHEET_PROJECTOR_ */