SbSphereSectionProjector.h

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/*=======================================================================
** Author      : Howard Look (MMM yyyy)
** Modified by : Paul Isaacs (MMM yyyy)
**=======================================================================*/
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef _SB_SPHERE_SECTION_PROJECTOR_
#define _SB_SPHERE_SECTION_PROJECTOR_
 
#include <Inventor/projectors/SbSphereProjector.h>
 
class  SbSphereSectionProjector : public SbSphereProjector
{
 public:
  SbSphereSectionProjector(float  edgeTol = 0.9f,
                           SbBool orientToEye = TRUE);
 
  SbSphereSectionProjector(const SbSphere &sph,
                           float edgeTol = 0.9f, 
                           SbBool orientToEye = TRUE);
 
  ~SbSphereSectionProjector() {}
  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);
 
  void                setTolerance(float edgeTol);
 
  float               getTolerance() const              { return tolerance; }
 
  void                setRadialFactor(float rad = 0.0) { radialFactor = rad;}
  float               getRadialFactor() const  { return radialFactor; }
 
  SbBool              isWithinTolerance(const SbVec3f &point);
    
 private:
  
  // Sets up the tolerance slice.
  // If projecting from a point, call with no parameters.
  // If intersecting a line, pass the line in *working space*.
  virtual void        setupTolerance( const SbLine *line = NULL );
 
  // Apply the projector using the given line in working space.
  // Encapsulates code common to project and intersect methods.
  // New for v3.0
  virtual SbVec3f intersectWorkingLine( const SbLine &line );
 
  // Information about the slice tolerance.
  float               tolerance;  // the edge tolerance
  float               tolDist;    // dist from planePoint to tolerance slice
 
  float               radialFactor;
    
  // 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_SECTION_PROJECTOR_ */