MeVis/ThirdParty/Sources/Inventor/inventor/lib/database/include/Inventor/projectors/SbPlaneProjector.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 SbPlaneProjector
 |      class. This projects the mouse onto a plane. If orientToEye
 |      is set to TRUE, the plane will be oriented to the eye.
 |        
 |   Author(s)          : Howard Look, Paul Isaacs
 |
 ______________  S I L I C O N   G R A P H I C S   I N C .  ____________
 _______________________________________________________________________
 */

#ifndef _SB_PLANE_PROJECTOR_
#define _SB_PLANE_PROJECTOR_

#include <Inventor/projectors/SbProjector.h>




class INVENTOR_API SbPlaneProjector : public SbProjector
{
  public:

    SbPlaneProjector(SbBool orient = FALSE);
    
    SbPlaneProjector(const SbPlane &plane,
                     SbBool orient = FALSE);

    ~SbPlaneProjector(){};
    
    virtual SbProjector *    copy() const;

    virtual SbVec3f     project(const SbVec2f &point);

    void                setPlane(const SbPlane &plane);

    const SbPlane &     getPlane() const                  { return plane; }

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

    virtual SbVec3f     getVector(const SbVec2f &mousePosition1,
                                  const SbVec2f &mousePosition2);

    virtual SbVec3f     getVector(const SbVec2f &mousePosition);

    void                setStartPosition(const SbVec2f &mousePosition)
                                        { lastPoint = project(mousePosition); }

    void                setStartPosition(const SbVec3f &point)
                                            { lastPoint = point; }
  protected:

    SbPlane     plane;
    SbBool      orientToEye;    
    SbBool      needSetup;      
    SbPlane     nonOrientPlane; 

    SbVec3f     lastPoint;      

    void        setupPlane();   
};

#endif /* _SB_PLANE_PROJECTOR_ */