VRS - The Virtual Rendering System

version 3.3

shadowvolumetechniquegl.h

Go to the documentation of this file.

/******************************************************************************
 * VRS - The Virtual Rendering System
 * Copyright (C) 2000-2004 Computer Graphics Systems Group at the 
 * Hasso-Plattner-Institute (HPI), Potsdam, Germany.
 *
 * 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. You should have received
 * a copy of the GNU Lesser+ General Public License along with this library; if
 * not, write to the FreeSoftware Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA, 02111-1307, USA.
 ******************************************************************************/

// $Id: shadowvolumetechniquegl.h 6014 2007-08-09 07:51:16Z Konstantin_Baumann $
// $Date: 2007-08-09 09:51:16 +0200 (Thu, 09 Aug 2007) $
// $Revision: 6014 $
// $State$
// $Author: Konstantin_Baumann $
//
// $Log$
// Revision 1.2  2005/01/03 01:43:09  klimetschek
// - modified win32 project layout, splitted vrs.vcproj into vrs_container, vrs_core, vrs_sg, vrs_image, vrs_opengl and vrs_io
// - removed vrs.vcproj
// minor things:
// - added all glutexamples to vrs4glut.sln
// - fixed some problems in glutexamples
// - removed all project references from all VS projects (using solution wide project dependencies instead)
//
// Revision 1.1  2004/07/12 12:53:53  kirsch
// added shadow volume technique for OpenGL
//
// Revision 1.6  2004/07/09 13:28:16  kirsch
// Merged two-sided shadow volume technique and normal shadow volume technique
// using template design pattern. Added comments. Major code cleanup.
//
// Revision 1.5  2004/03/15 08:18:03  kirsch
// removed vrs namespace macros
//
// Revision 1.4  2004/02/13 12:35:14  kirsch
// minor changes
//
// Revision 1.3  2003/06/24 10:52:52  kirsch
// added missing logs
//

#ifndef _VRS_OPENGL_SHADOWVOLUMETECHNIQUEGL_H
#define _VRS_OPENGL_SHADOWVOLUMETECHNIQUEGL_H

// This header file defines                                                 //
//    * BaseShadowVolumeTechniqueGL                                         //
//    * ShadowVolumeTechniqueGL                                             //
//    * TwoSidedShadowVolumeTechniqueGL                                     //

#include <vrs/opengl/shadowtechniquegl.h>

namespace VRS {

//                       BaseShadowVolumeTechniqueGL                        //

class VRS_CORE_API BaseShadowVolumeTechniqueGL : public ShadowTechniqueTemplateGL  {
public: 
    BaseShadowVolumeTechniqueGL();

    virtual bool isSupported(Engine*, bool verbose) const;
    VRS_TYPEINFO(BaseShadowVolumeTechniqueGL, ShadowTechniqueTemplateGL);

protected:
    virtual void prepareStencilingInPreparePass(Engine*) const = 0;
    virtual void resetStencilingInFinishPass(Engine*) const = 0;
        // Implementations of the hooks defined by the ShadowTechniqueTemplateGL
    virtual void startHook(Engine*);
    virtual void stopHook(Engine*);

    virtual bool preparePassHook(Engine*);
    virtual void finishPassHook(Engine*);
    virtual void nextPassHook(Engine*);

    virtual bool prepareEvalHook(Engine* engine, const Shape* shape);
    virtual void finishEvalHook(Engine* engine, const Shape* shape, bool render);

    virtual void setupShadowTest(bool onOff, Engine*);
    virtual void toggleShadowTest(bool receiving, Engine*);
};

//                         ShadowVolumeTechniqueGL                          //

class VRS_CORE_API ShadowVolumeTechniqueGL : public BaseShadowVolumeTechniqueGL  {
public: 
    ShadowVolumeTechniqueGL();

    virtual int rate(Engine*) const;
    VRS_TYPEINFO(ShadowVolumeTechniqueGL, BaseShadowVolumeTechniqueGL);
    VRS_SERIALIZABLE(ShadowVolumeTechniqueGL);

protected:
        // Implement the template pattern defined in BaseShadowVolumeTechniqueGL
    virtual void prepareStencilingInPreparePass(Engine*) const;
    virtual void resetStencilingInFinishPass(Engine*) const;
};

//                     TwoSidedShadowVolumeTechniqueGL                      //

class VRS_CORE_API TwoSidedShadowVolumeTechniqueGL : public BaseShadowVolumeTechniqueGL  {
public: 
    TwoSidedShadowVolumeTechniqueGL();

    virtual bool isSupported(Engine*, bool verbose) const;
    virtual int rate(Engine*) const;
    VRS_TYPEINFO(TwoSidedShadowVolumeTechniqueGL, BaseShadowVolumeTechniqueGL);
    VRS_SERIALIZABLE(TwoSidedShadowVolumeTechniqueGL);

protected:
    virtual bool preparePassHook(Engine*);
    virtual void finishPassHook(Engine*);

        // Implement the template pattern defined in BaseShadowVolumeTechniqueGL
    virtual void prepareStencilingInPreparePass(Engine*) const;
    virtual void resetStencilingInFinishPass(Engine*) const;
};

} // namespace VRS

#endif // _VRS_OPENGL_SHADOWVOLUMETECHNIQUEGL_H

---

Generated on Thu May 24 06:00:15 2012 by Doxygen 1.5.6

© 2001-2010 Hasso-Plattner-Institut | Impressum | Contact