SbProjector.h

#ifndef COIN_SBPROJECTOR_H
#define COIN_SBPROJECTOR_H

/**************************************************************************\
 * Copyright (c) Kongsberg Oil & Gas Technologies AS
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 * this software without specific prior written permission.
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#include <Inventor/SbVec3f.h>
#include <Inventor/SbLine.h>
#include <Inventor/SbMatrix.h>
#include <Inventor/SbViewVolume.h>

class SbVec2f;

class COIN_DLL_API SbProjector {
public:
  virtual SbVec3f project(const SbVec2f & point) = 0;
  virtual void setViewVolume(const SbViewVolume & vol);
  const SbViewVolume & getViewVolume(void) const;
  virtual void setWorkingSpace(const SbMatrix & space);
  const SbMatrix & getWorkingSpace(void) const;
  virtual SbProjector * copy(void) const = 0;

  virtual SbBool tryProject(const SbVec2f & point, const float epsilon, SbVec3f & result);

protected:
  SbProjector(void);
  virtual ~SbProjector() { }

  SbLine getWorkingLine(const SbVec2f & point) const;

  SbViewVolume viewVol;
  SbMatrix worldToWorking, workingToWorld;

  float findVanishingDistance(void) const;
  SbBool verifyProjection(const SbVec3f & projpt) const;
};

#endif // !COIN_SBPROJECTOR_H