Add osgShadow ViewDependentShadowMaps as they can be found in OSG's GitHub Repository

components/CMakeLists.txt

@@ -56,7 +56,7 @@ add_component_dir (shader
 
 add_component_dir (sceneutil
     clone attach visitor util statesetupdater controller skeleton riggeometry morphgeometry lightcontroller
-    lightmanager lightutil positionattitudetransform workqueue unrefqueue pathgridutil waterutil writescene serialize optimizer shadow
+    lightmanager lightutil positionattitudetransform workqueue unrefqueue pathgridutil waterutil writescene serialize optimizer shadow mwshadowtechnique
     )
 
 add_component_dir (nif

components/sceneutil/mwshadowtechnique

@@ -0,0 +1,196 @@
+/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2011 Robert Osfield
+ *
+ * This library is open source and may be redistributed and/or modified under
+ * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
+ * (at your option) any later version.  The full license is in LICENSE file
+ * included with this distribution, and on the openscenegraph.org website.
+ *
+ * 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
+ * OpenSceneGraph Public License for more details.
+*/
+
+#ifndef OSGSHADOW_VIEWDEPENDENTSHADOWMAP
+#define OSGSHADOW_VIEWDEPENDENTSHADOWMAP 1
+
+#include <osg/Camera>
+#include <osg/Material>
+#include <osg/MatrixTransform>
+#include <osg/LightSource>
+#include <osg/PolygonOffset>
+
+#include <osgShadow/ShadowTechnique>
+
+namespace osgShadow {
+
+/** ViewDependentShadowMap provides an base implementation of view dependent shadow mapping techniques.*/
+class OSGSHADOW_EXPORT ViewDependentShadowMap : public ShadowTechnique
+{
+    public :
+        ViewDependentShadowMap();
+
+        ViewDependentShadowMap(const ViewDependentShadowMap& vdsm, const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
+
+        META_Object(osgShadow, ViewDependentShadowMap);
+
+        /** initialize the ShadowedScene and local cached data structures.*/
+        virtual void init();
+
+        /** run the update traversal of the ShadowedScene and update any loca chached data structures.*/
+        virtual void update(osg::NodeVisitor& nv);
+
+        /** run the cull traversal of the ShadowedScene and set up the rendering for this ShadowTechnique.*/
+        virtual void cull(osgUtil::CullVisitor& cv);
+
+        /** Resize any per context GLObject buffers to specified size. */
+        virtual void resizeGLObjectBuffers(unsigned int maxSize);
+
+        /** If State is non-zero, this function releases any associated OpenGL objects for
+           * the specified graphics context. Otherwise, releases OpenGL objects
+           * for all graphics contexts. */
+        virtual void releaseGLObjects(osg::State* = 0) const;
+
+        /** Clean scene graph from any shadow technique specific nodes, state and drawables.*/
+        virtual void cleanSceneGraph();
+
+
+        struct OSGSHADOW_EXPORT Frustum
+        {
+            Frustum(osgUtil::CullVisitor* cv, double minZNear, double maxZFar);
+
+            osg::Matrixd projectionMatrix;
+            osg::Matrixd modelViewMatrix;
+
+            typedef std::vector<osg::Vec3d> Vertices;
+            Vertices corners;
+
+            typedef std::vector<unsigned int> Indices;
+            typedef std::vector<Indices> Faces;
+            Faces faces;
+
+            typedef std::vector<Indices> Edges;
+            Edges edges;
+
+            osg::Vec3d eye;
+            osg::Vec3d centerNearPlane;
+            osg::Vec3d centerFarPlane;
+            osg::Vec3d center;
+            osg::Vec3d frustumCenterLine;
+        };
+
+        // forward declare
+        class ViewDependentData;
+
+        struct OSGSHADOW_EXPORT LightData : public osg::Referenced
+        {
+            LightData(ViewDependentData* vdd);
+
+            virtual void setLightData(osg::RefMatrix* lm, const osg::Light* l, const osg::Matrixd& modelViewMatrix);
+
+            ViewDependentData*                  _viewDependentData;
+
+            osg::ref_ptr<osg::RefMatrix>        lightMatrix;
+            osg::ref_ptr<const osg::Light>      light;
+
+            osg::Vec4d                          lightPos;
+            osg::Vec3d                          lightPos3;
+            osg::Vec3d                          lightDir;
+            bool                                directionalLight;
+
+            typedef std::vector<unsigned int> ActiveTextureUnits;
+            ActiveTextureUnits                   textureUnits;
+        };
+
+        typedef std::list< osg::ref_ptr<LightData> > LightDataList;
+
+        struct OSGSHADOW_EXPORT ShadowData : public osg::Referenced
+        {
+            ShadowData(ViewDependentData* vdd);
+
+            virtual void releaseGLObjects(osg::State* = 0) const;
+
+            ViewDependentData*                  _viewDependentData;
+
+            unsigned int                        _textureUnit;
+            osg::ref_ptr<osg::Texture2D>        _texture;
+            osg::ref_ptr<osg::TexGen>           _texgen;
+            osg::ref_ptr<osg::Camera>           _camera;
+        };
+
+        typedef std::list< osg::ref_ptr<ShadowData> > ShadowDataList;
+
+
+        class OSGSHADOW_EXPORT ViewDependentData : public osg::Referenced
+        {
+        public:
+            ViewDependentData(ViewDependentShadowMap* vdsm);
+
+            const ViewDependentShadowMap* getViewDependentShadowMap() const { return _viewDependentShadowMap; }
+
+            LightDataList& getLightDataList() { return _lightDataList; }
+
+            ShadowDataList& getShadowDataList() { return _shadowDataList; }
+
+            osg::StateSet* getStateSet() { return _stateset.get(); }
+
+            virtual void releaseGLObjects(osg::State* = 0) const;
+
+        protected:
+            virtual ~ViewDependentData() {}
+
+            ViewDependentShadowMap*     _viewDependentShadowMap;
+
+            osg::ref_ptr<osg::StateSet> _stateset;
+
+            LightDataList               _lightDataList;
+            ShadowDataList              _shadowDataList;
+        };
+
+        virtual ViewDependentData* createViewDependentData(osgUtil::CullVisitor* cv);
+
+        ViewDependentData* getViewDependentData(osgUtil::CullVisitor* cv);
+
+
+
+        virtual void createShaders();
+
+        virtual bool selectActiveLights(osgUtil::CullVisitor* cv, ViewDependentData* vdd) const;
+
+        virtual osg::Polytope computeLightViewFrustumPolytope(Frustum& frustum, LightData& positionedLight);
+
+        virtual bool computeShadowCameraSettings(Frustum& frustum, LightData& positionedLight, osg::Matrixd& projectionMatrix, osg::Matrixd& viewMatrix);
+
+        virtual bool adjustPerspectiveShadowMapCameraSettings(osgUtil::RenderStage* renderStage, Frustum& frustum, LightData& positionedLight, osg::Camera* camera);
+
+        virtual bool assignTexGenSettings(osgUtil::CullVisitor* cv, osg::Camera* camera, unsigned int textureUnit, osg::TexGen* texgen);
+
+        virtual void cullShadowReceivingScene(osgUtil::CullVisitor* cv) const;
+
+        virtual void cullShadowCastingScene(osgUtil::CullVisitor* cv, osg::Camera* camera) const;
+
+        virtual osg::StateSet* selectStateSetForRenderingShadow(ViewDependentData& vdd) const;
+
+protected:
+        virtual ~ViewDependentShadowMap();
+
+        typedef std::map< osgUtil::CullVisitor*, osg::ref_ptr<ViewDependentData> >  ViewDependentDataMap;
+        mutable OpenThreads::Mutex              _viewDependentDataMapMutex;
+        ViewDependentDataMap                    _viewDependentDataMap;
+
+        osg::ref_ptr<osg::StateSet>             _shadowRecievingPlaceholderStateSet;
+
+        osg::ref_ptr<osg::StateSet>             _shadowCastingStateSet;
+        osg::ref_ptr<osg::PolygonOffset>        _polygonOffset;
+        osg::ref_ptr<osg::Texture2D>            _fallbackBaseTexture;
+        osg::ref_ptr<osg::Texture2D>            _fallbackShadowMapTexture;
+
+        typedef std::vector< osg::ref_ptr<osg::Uniform> > Uniforms;
+        mutable OpenThreads::Mutex              _accessUniformsAndProgramMutex;
+        Uniforms                                _uniforms;
+        osg::ref_ptr<osg::Program>              _program;
+};
+
+}
+
+#endif