SbCylinderProjector.h

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/*=======================================================================
** Author      : Howard Look (MMM yyyy)
**=======================================================================*/
/*=======================================================================
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**=======================================================================*/
/*=======================================================================
** Modified by : VSG (MMM YYYY)
**=======================================================================*/
 
 
#ifndef _SB_CYLINDER_PROJECTOR_
#define _SB_CYLINDER_PROJECTOR_
 
#include <Inventor/projectors/SbProjector.h>
 
class  SbCylinderProjector : public SbProjector
{
 public:
  virtual ~SbCylinderProjector() {};
 
  virtual SbVec3f     project(const SbVec2f &point) = 0;
  virtual SbVec3f intersect( const SbLine &line ) = 0;
 
  SbVec3f             projectAndGetRotation(const SbVec2f &point,
                                            SbRotation &rot);
 
  virtual SbRotation  getRotation(const SbVec3f &point1,
                                  const SbVec3f &point2) = 0;
 
  void                setCylinder(const SbCylinder &cyl);
 
  const SbCylinder &  getCylinder() const             { return cylinder; }
 
  void                setOrientToEye(SbBool orientToEye);
  SbBool              isOrientToEye() const           { return orientToEye; }
  void                setFront(SbBool isFront);
  SbBool              isFront()       const   { return intersectFront; }
  SbBool              isPointInFront( const SbVec3f &point ) const;
  virtual void        setWorkingSpace(const SbMatrix &space);
    
 private:
  // Constructors
  // The default cylinder to is centered about the Y axis and
  // has a radius of 1.0.
  SbCylinderProjector(SbBool orientToEye);
  SbCylinderProjector(const  SbCylinder &cyl,
                      SbBool orientToEye);
 
  // Are intersections done on the front half ( if not, they're done on th e
  // back half) of the cylinder?
  SbBool      intersectFront;
 
  // Just like cylinder::intersect, except always returns
  // the intersection that is in "front".
  SbBool      intersectCylinderFront(const SbLine &line, SbVec3f &result);
 
  SbCylinder  cylinder;               // Cylinder for this projector.
  SbBool      orientToEye;            // TRUE if always oriented to eye.
  SbBool      needSetup;              // Set TRUE whenever cylinder,
  // work space or orientation changes.
 
  // Cached last point on this projector. Subclasses must set
  // this in their project and getRotation methods.
  SbVec3f     lastPoint;
 
};
 
 
#endif /* _SB_CYLINDER_PROJECTOR_ */