VRS - The Virtual Rendering System

version 3.3

mirrortechniquegl.h

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 /**********************************************************************
 VRS - The Virtual Rendering System
 Copyright (C) 2001 Computer Graphics Systems Group at the 
 Hasso-Plattner-Institute, 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: mirrortechniquegl.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 1.33  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 1.32  2004/06/27 11:47:59  kirsch
// code cleanup
//
// Revision 1.31  2004/03/12 16:28:40  baumann
// macros VRS_NAMESPACE_BEGIN/_END expanded and removed
//
// Revision 1.30  2004/01/19 11:43:58  baumann
// serialization mechanism improved
//
// Revision 1.29  2003/11/29 11:29:23  kirsch
// - added support for local poly attributes
// - removed PolyAttribute::switchDefault() and Attribute::rememberTransform()
// - renamed Engine::SwType: On/Off/All to Engine::SwitchType: ON/OFF/ALL
// - changed class hierarchy of TechniqueProcessor and Technique
// - GLCanvas::prepareRedisplay() / finishRedisplay() now push / pop standard attributes
//
// Revision 1.28  2003/06/17 10:51:24  kirsch
// made Mirror independent of ShapeMaterialGL
//
// Revision 1.27  2003/03/21 17:06:03  kirsch
// changed Facet orientation to make it match VRS' left-handed coordinate system
//
// Revision 1.26  2002/10/10 14:45:49  kirsch
// comparison between signed/unsigned warning fix
//
// Revision 1.25  2002/07/04 14:23:56  kirsch
// removed IteratorWrapper
//
// Revision 1.24  2002/07/03 09:21:33  kersting
// added NonPersistent
//
// Revision 1.23  2002/07/02 15:23:48  baumann
// non-persistent containers now have the prefix NonPersistent, e.g. NonPersistentArray<T>
// persistent containers now have no prefix, e.g. Array<T>
//
// Revision 1.22  2002/07/02 06:12:34  baumann
// VRS::Iterator<T> completely rewritten
//
// Revision 1.21  2002/06/24 14:03:38  baumann
// changed List<T> to Array<T>
//
// Revision 1.20  2002/06/20 10:05:30  kirsch
// added PlanarMirror, derived from (now abstract) class Mirror
//
// Revision 1.19  2002/05/13 15:11:03  kirsch
// using occlusionquery to discard non-visible mirrors, thus saving some passes
//
// Revision 1.18  2002/04/25 08:29:43  kirsch
// added persistency
//
// Revision 1.17  2002/04/19 08:22:06  kirsch
// removed typo
//
// Revision 1.16  2002/03/04 12:00:26  kersting
// directory structure changes
//
// Revision 1.15  2002/03/03 21:44:26  kosta
// VRS_TYPEINFO-macro rewritten
//
// Revision 1.14  2002/02/19 10:34:19  kosta
// undone all changes since 2002-02-15
//
// Revision 1.11  2002/01/25 16:42:06  kirsch
// added canBeUsed() for techniques, and properly react in some OpenGL
// techniques when needed extensions are missing
//
// Revision 1.10  2002/01/15 16:25:55  kosta
// macros rewritten for a better namespace support
//
// Revision 1.9  2001/11/13 16:36:31  kirsch
// changed line feed to unix style (removed control-M)
//
// Revision 1.8  2001/09/13 11:14:28  kirsch
// created usesPass() that returns true for all passes between MIRRORPASSESBEGIN
// and MIRRORPASSESEND
//
// Revision 1.7  2001/09/10 21:01:00  kirsch
// Shapes with SurfaceStyleGL now are also mirrored with this SurfaceStyleGL
//
// Revision 1.6  2001/09/05 14:14:36  kirsch
// Documentation updates
//
// Revision 1.5  2001/08/20 13:47:37  kirsch
// Stencilbuffer was cleared unnecessarily in TechniqueGL
//
// Revision 1.4  2001/08/01 13:20:07  kirsch
// using engine to save retrieve modelview/projection matrix in
// clearDepthBufferWhereTheMirrorsAre
//
// Revision 1.3  2001/07/31 08:22:59  kirsch
// mirror is correctly clipped now
//
// Revision 1.2  2001/07/30 15:25:36  kirsch
// Added mirrors
//
// Revision 1.1.2.2  2001/06/27 19:54:06  kirsch
// first working mirror, cleaned up mirrortechniquegl a bit
//
// Revision 1.1.2.1  2001/06/15 12:56:05  kirsch
// pretraversal integrated, synthesizer replaced, polyattributes don't get
// properly rendered
//

#ifndef VRS_OPENGL_MIRRORTECHNIQUEGL_H
#define VRS_OPENGL_MIRRORTECHNIQUEGL_H

#include <vrs/opengl/techniquegl.h>
#include <vrs/engine.h>

namespace VRS {

class ClipPlane;
class Mirror;
class OcclusionQueryGL;
class PlanarMirror;
class ShapeMaterialGL;
class StencilBitGL;
template<typename T> class NonPersistentArray;
template<typename T, typename V> class NonPersistentDictionary;

class VRS_CORE_API MirrorTechniqueGL : public TechniqueGL  {
public: 
    MirrorTechniqueGL();
    virtual void start(Engine*);
    virtual void stop(Engine*);

    virtual bool preparePass(Engine*);
    virtual void finishPass(Engine*);
    virtual void nextPass(Engine*);

    virtual bool usesPass(int pass) const;
    virtual bool prepareEval(Engine* engine, const Shape* shape);
    virtual void finishEval(Engine* engine, const Shape* shape);

    virtual bool canBeUsed(Engine* engine) const;
    VRS_TYPEINFO(MirrorTechniqueGL, TechniqueGL);
    VRS_SERIALIZABLE(MirrorTechniqueGL);

    static bool haveMirroredReferencingMirror(const Mirror*, Engine*, Engine::SwitchType);
    static ShapeMaterialGL* newMaterialWithAlphaAsQuality(const Mirror*, Engine* engine);

private:
    void clearDepthBufferWhereTheMirrorsAre(Engine* engine) const;

    enum { NORMAL = 1, STENCIL = 2 };

    PlanarMirror* planarMirror_;

    int mainpass_;
    bool mirrorPass_;

    SO<OcclusionQueryGL> mirrorOcclusionTest_;

    SO<ClipPlane> clip_;

    SO<NonPersistentArray<SO<MonoAttribute> > > mirrorList_;
    unsigned int mirrorIndex_;

    SO<NonPersistentDictionary<SO<SharedObj>, SO<StencilBitGL> > > stencilDict_;
};

} // namespace VRS

#endif // VRS_OPENGL_MIRRORTECHNIQUEGL_H

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