108 lines
3.9 KiB
C++
108 lines
3.9 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSGSHADOW_VIEWDEPENDENTSHADOWMAP
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#define OSGSHADOW_VIEWDEPENDENTSHADOWMAP 1
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#include <osg/Camera>
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#include <osg/Material>
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#include <osg/MatrixTransform>
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#include <osg/LightSource>
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#include <osgShadow/ShadowTechnique>
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namespace osgShadow {
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/** ViewDependentShadowMap provides an base implementation of view dependent shadow mapping techniques.*/
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class OSGSHADOW_EXPORT ViewDependentShadowMap : public ShadowTechnique
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{
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public :
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ViewDependentShadowMap();
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ViewDependentShadowMap(const ViewDependentShadowMap& vdsm, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
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META_Object(osgShadow, ViewDependentShadowMap);
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/** initialize the ShadowedScene and local cached data structures.*/
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virtual void init();
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/** run the update traversal of the ShadowedScene and update any loca chached data structures.*/
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virtual void update(osg::NodeVisitor& nv);
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/** run the cull traversal of the ShadowedScene and set up the rendering for this ShadowTechnique.*/
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virtual void cull(osgUtil::CullVisitor& cv);
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/** Clean scene graph from any shadow technique specific nodes, state and drawables.*/
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virtual void cleanSceneGraph();
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struct OSGSHADOW_EXPORT LightShadowData : public osg::Referenced
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{
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unsigned int _textureUnit;
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osg::ref_ptr<osg::Texture> _texture;
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osg::ref_ptr<osg::TexGen> _texgen;
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osg::ref_ptr<osg::Light> _light;
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osg::ref_ptr<osg::Camera> _camera;
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};
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class OSGSHADOW_EXPORT ViewDependentData : public osg::Referenced
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{
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public:
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ViewDependentData(ViewDependentShadowMap* vdsm, osgUtil::CullVisitor* cv);
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void cullShadowCastingScene(osgUtil::CullVisitor* cv);
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void cull(osgUtil::CullVisitor*);
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protected:
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virtual ~ViewDependentData() {}
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osg::ref_ptr<osg::StateSet> _stateset;
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};
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virtual ViewDependentData* createViewDependentData(osgUtil::CullVisitor* cv);
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ViewDependentData* getViewDependentData(osgUtil::CullVisitor* cv);
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typedef std::pair< osg::ref_ptr<osg::RefMatrix>, osg::ref_ptr<const osg::Light> > PositionedLight;
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typedef std::list< PositionedLight > PositionedLightList;
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virtual bool selectActiveLights(osgUtil::CullVisitor* cv, PositionedLightList& pll) const;
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virtual osg::Polytope computeLightViewFrustumPolytope(osgUtil::CullVisitor* cv, PositionedLight& positionedLight);
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virtual bool computeShadowCameraSettings(PositionedLight& positionedLight, osg::Polytope& polytope, osg::Camera* camera);
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virtual bool assignTexGenSettings(osgUtil::CullVisitor* cv, osg::Camera* camera, unsigned int textureUnit, osg::TexGen* texgen);
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virtual void cullShadowReceivingScene(osgUtil::CullVisitor* cv, osg::StateSet* stateset) const;
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virtual void cullShadowCastingScene(osgUtil::CullVisitor* cv, osg::Camera* camera) const;
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protected:
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virtual ~ViewDependentShadowMap();
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typedef std::map< osgUtil::CullVisitor*, osg::ref_ptr<ViewDependentData> > ViewDependentDataMap;
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OpenThreads::Mutex _viewDependentDataMapMutex;
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ViewDependentDataMap _viewDependentDataMap;
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};
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}
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#endif
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