# SbProjector.h

    00001 #ifndef COIN_SBPROJECTOR_H
    00002 #define COIN_SBPROJECTOR_H
    00003
    00004 /**************************************************************************\
    00005  *
    00006  *  This file is part of the Coin 3D visualization library.
    00007  *  Copyright (C) 1998-2003 by Systems in Motion.  All rights reserved.
    00008  *
    00009  *  This library is free software; you can redistribute it and/or
    00010  *  modify it under the terms of the GNU General Public License
    00011  *  ("GPL") version 2 as published by the Free Software Foundation.
    00012  *  See the file LICENSE.GPL at the root directory of this source
    00013  *  distribution for additional information about the GNU GPL.
    00014  *
    00015  *  For using Coin with software that can not be combined with the GNU
    00016  *  GPL, and for taking advantage of the additional benefits of our
    00017  *  support services, please contact Systems in Motion about acquiring
    00018  *  a Coin Professional Edition License.
    00019  *
    00020  *  See <URL:http://www.coin3d.org> for  more information.
    00021  *
    00022  *  Systems in Motion, Teknobyen, Abels Gate 5, 7030 Trondheim, NORWAY.
    00023  *  <URL:http://www.sim.no>.
    00024  *
    00025 \**************************************************************************/
    00026
    00027 #include <Inventor/SbVec3f.h>
    00028 #include <Inventor/SbLine.h>
    00029 #include <Inventor/SbMatrix.h>
    00030 #include <Inventor/SbViewVolume.h>
    00031
    00032 class SbVec2f;
    00033
    00034 class COIN_DLL_API SbProjector {
    00035 public:
    00036   virtual SbVec3f project(const SbVec2f & point) = 0;
    00037   virtual void setViewVolume(const SbViewVolume & vol);
    00038   const SbViewVolume & getViewVolume(void) const;
    00039   virtual void setWorkingSpace(const SbMatrix & space);
    00040   const SbMatrix & getWorkingSpace(void) const;
    00041   virtual SbProjector * copy(void) const = 0;
    00042
    00043 protected:
    00044   SbProjector(void);
    00045   virtual ~SbProjector() { }
    00046
    00047   SbLine getWorkingLine(const SbVec2f & point) const;
    00048
    00049   SbViewVolume viewVol;
    00050   SbMatrix worldToWorking, workingToWorld;
    00051
    00052   float findVanishingDistance(void) const;
    00053   SbBool verifyProjection(const SbVec3f & projpt) const;
    00054 };
    00055
    00056 #endif // !COIN_SBPROJECTOR_H