MeVis/ThirdParty/Sources/Inventor/inventor/lib/database/include/Inventor/projectors/SbSphereProjector.h

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/*
 *
 *  Copyright (C) 2000 Silicon Graphics, Inc.  All Rights Reserved. 
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  Further, this software is distributed without any warranty that it is
 *  free of the rightful claim of any third person regarding infringement
 *  or the like.  Any license provided herein, whether implied or
 *  otherwise, applies only to this software file.  Patent licenses, if
 *  any, provided herein do not apply to combinations of this program with
 *  other software, or any other product whatsoever.
 * 
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
 *  Mountain View, CA  94043, or:
 * 
 *  http://www.sgi.com 
 * 
 *  For further information regarding this notice, see: 
 * 
 *  http://oss.sgi.com/projects/GenInfo/NoticeExplan/
 *
 */


/*
 * Copyright (C) 1990,91,92   Silicon Graphics, Inc.
 *
 _______________________________________________________________________
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 |
 |   $Revision: 1.1.1.1 $
 |
 |   Description:
 |      This file contains the definition of the SbSphereProjector
 |      class. This is an abstract base class for projectors
 |      that somehow use a sphere in their projection.
 |        
 |   Author(s)          : Howard Look
 |
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 _______________________________________________________________________
 */

#ifndef _SB_SPHERE_PROJECTOR_
#define _SB_SPHERE_PROJECTOR_

#include <Inventor/projectors/SbProjector.h>




class INVENTOR_API SbSphereProjector : public SbProjector
{
  public:
    virtual SbVec3f     project(const SbVec2f &point) = 0;

    SbVec3f             projectAndGetRotation(const SbVec2f &point,
                                              SbRotation &rot);

    virtual SbRotation  getRotation(const SbVec3f &point1,
                                    const SbVec3f &point2) = 0;

    void                setSphere(const SbSphere &sph);

    const SbSphere &    getSphere() const                 { return sphere; }

    void                setOrientToEye(SbBool orientToEye);
    SbBool              isOrientToEye() const           { return orientToEye; }

    void                setFront(SbBool inFront);
    SbBool              isFront()       const   { return intersectFront; }
    SbBool              isPointInFront( const SbVec3f &point ) const;

    virtual void            setWorkingSpace(const SbMatrix &space);

    ~SbSphereProjector(){};
    
  protected:
    SbSphereProjector(SbBool orientToEye);
    SbSphereProjector(const SbSphere &s, SbBool orientToEye);

    SbBool      intersectFront;

    SbBool      intersectSphereFront(const SbLine &l, SbVec3f &result);

    SbSphere    sphere;                 
    SbBool      orientToEye;            
    SbBool      needSetup;              


    SbVec3f     lastPoint;
};

#endif /* _SB_SPHERE_PROJECTOR_ */