122 lines
4.0 KiB
C++
122 lines
4.0 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2009 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 OSGVOLUME_MULTIPASSTECHNIQUE
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#define OSGVOLUME_MULTIPASSTECHNIQUE 1
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#include <osgVolume/VolumeTechnique>
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#include <osg/MatrixTransform>
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#include <osg/Texture2D>
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namespace osgVolume {
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class OSGVOLUME_EXPORT MultipassTechnique : public VolumeTechnique
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{
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public:
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MultipassTechnique();
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MultipassTechnique(const MultipassTechnique&,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
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META_Object(osgVolume, MultipassTechnique);
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virtual void init();
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virtual void update(osgUtil::UpdateVisitor* nv);
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virtual void backfaceSubgraphCullTraversal(osgUtil::CullVisitor* cv);
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virtual void cull(osgUtil::CullVisitor* cv);
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/** Clean scene graph from any terrain technique specific nodes.*/
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virtual void cleanSceneGraph();
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/** Traverse the terrain subgraph.*/
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virtual void traverse(osg::NodeVisitor& nv);
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enum RenderingMode
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{
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CUBE,
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HULL,
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CUBE_AND_HULL
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};
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RenderingMode computeRenderingMode();
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/** Container for render to texture objects used when doing multi-pass volume rendering techniques.*/
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struct OSGVOLUME_EXPORT MultipassTileData : public TileData
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{
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MultipassTileData(osgUtil::CullVisitor* cv, MultipassTechnique* mpt);
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virtual void update(osgUtil::CullVisitor* cv);
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void setUp(osg::ref_ptr<osg::Camera>& camera, osg::ref_ptr<osg::Texture2D>& texture2D, int width, int height);
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osg::observer_ptr<MultipassTechnique> multipassTechnique;
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RenderingMode currentRenderingMode;
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osg::ref_ptr<osg::Texture2D> frontFaceDepthTexture;
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osg::ref_ptr<osg::Camera> frontFaceRttCamera;
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osg::ref_ptr<osg::Texture2D> backFaceDepthTexture;
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osg::ref_ptr<osg::Camera> backFaceRttCamera;
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osg::ref_ptr<osg::Uniform> eyeToTileUniform;
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osg::ref_ptr<osg::Uniform> tileToImageUniform;
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};
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/** Called from VolumeScene to create the TileData container when a multi-pass technique is being used.
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* The TileData container caches any render to texture objects that are required. */
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virtual TileData* createTileData(osgUtil::CullVisitor* cv) { return new MultipassTileData(cv, this); }
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protected:
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virtual ~MultipassTechnique();
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osg::ref_ptr<osg::MatrixTransform> _transform;
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typedef std::map<osgUtil::CullVisitor::Identifier*, osg::Matrix> ModelViewMatrixMap;
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OpenThreads::Mutex _mutex;
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ModelViewMatrixMap _modelViewMatrixMap;
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osg::ref_ptr<osg::StateSet> _whenMovingStateSet;
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osg::ref_ptr<osg::StateSet> _volumeRenderStateSet;
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osg::StateSet* createStateSet(osg::StateSet* statesetPrototype, osg::Program* programPrototype, osg::Shader* shaderToAdd1=0, osg::Shader* shaderToAdd2=0);
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enum ShaderMask
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{
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CUBE_SHADERS = 1,
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HULL_SHADERS = 2,
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CUBE_AND_HULL_SHADERS = 4,
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STANDARD_SHADERS = 8,
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LIT_SHADERS = 16,
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ISO_SHADERS = 32,
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MIP_SHADERS = 64,
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TF_SHADERS = 128
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};
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typedef std::map<int, osg::ref_ptr<osg::StateSet> > StateSetMap;
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StateSetMap _stateSetMap;
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osg::ref_ptr<osg::StateSet> _frontFaceStateSet;
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};
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}
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#endif
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