Added support for controlling the extents of the volume rendering by nesting the hull underneath VolumeTile. Currently only supported by the new osgVolume::MultipassTechnique
This commit is contained in:
Robert Osfield
parent
a30ec25067
commit
1264ec736a
@ -33,7 +33,9 @@ class OSGVOLUME_EXPORT MultipassTechnique : public VolumeTechnique
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virtual void update(osgUtil::UpdateVisitor* nv);
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virtual void cull(osgUtil::CullVisitor* 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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@ -53,6 +55,7 @@ class OSGVOLUME_EXPORT MultipassTechnique : public VolumeTechnique
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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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@ -69,6 +72,8 @@ class OSGVOLUME_EXPORT MultipassTechnique : public VolumeTechnique
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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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@ -36,12 +36,6 @@ class OSGVOLUME_EXPORT VolumeScene : public osg::Group
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virtual void traverse(osg::NodeVisitor& nv);
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void tileVisited(osg::NodeVisitor* nv, osgVolume::VolumeTile* tile);
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protected:
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virtual ~VolumeScene();
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struct TileData : public osg::Referenced
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{
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TileData() : active(false) {}
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@ -54,8 +48,17 @@ class OSGVOLUME_EXPORT VolumeScene : public osg::Group
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osg::ref_ptr<osg::Texture2D> depthTexture;
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osg::ref_ptr<osg::Camera> rttCamera;
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osg::ref_ptr<osg::Camera> stateset;
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osg::ref_ptr<osg::StateSet> stateset;
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osg::ref_ptr<osg::Uniform> texgenUniform;
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};
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TileData* tileVisited(osgUtil::CullVisitor* cv, osgVolume::VolumeTile* tile);
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TileData* getTileData(osgUtil::CullVisitor* cv, osgVolume::VolumeTile* tile);
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protected:
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virtual ~VolumeScene();
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typedef std::map< VolumeTile*, osg::ref_ptr<TileData> > Tiles;
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class ViewData : public osg::Referenced
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@ -295,15 +295,17 @@ void MultipassTechnique::init()
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OSG_NOTICE<<"MultipassTechnique::init() : geometryMatrix = "<<geometryMatrix<<std::endl;
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OSG_NOTICE<<"MultipassTechnique::init() : imageMatrix = "<<imageMatrix<<std::endl;
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osg::ref_ptr<osg::StateSet> stateset = _transform->getOrCreateStateSet();
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osg::ref_ptr<osg::StateSet> stateset = new osg::StateSet;
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_volumeRenderStateSet = stateset;
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unsigned int texgenTextureUnit = 0;
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unsigned int volumeTextureUnit = 2;
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unsigned int volumeTextureUnit = 3;
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// set up uniforms
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{
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stateset->addUniform(new osg::Uniform("colorTexture",0));
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stateset->addUniform(new osg::Uniform("depthTexture",1));
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stateset->addUniform(new osg::Uniform("frontFaceDepthTexture",2));
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stateset->setMode(GL_ALPHA_TEST,osg::StateAttribute::ON);
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@ -355,7 +357,7 @@ void MultipassTechnique::init()
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}
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}
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stateset->setTextureAttributeAndModes(texgenTextureUnit, texgen.get(), osg::StateAttribute::ON);
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stateset->setTextureAttributeAndModes(texgenTextureUnit, texgen.get(), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
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}
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@ -407,7 +409,7 @@ void MultipassTechnique::init()
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}
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texture3D->setImage(image_3d);
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stateset->setTextureAttributeAndModes(volumeTextureUnit, texture3D, osg::StateAttribute::ON);
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stateset->setTextureAttributeAndModes(volumeTextureUnit, texture3D, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
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osg::ref_ptr<osg::Uniform> baseTextureSampler = new osg::Uniform("volumeTexture", int(volumeTextureUnit));
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stateset->addUniform(baseTextureSampler.get());
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@ -446,7 +448,7 @@ void MultipassTechnique::init()
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unsigned int transferFunctionTextureUnit = volumeTextureUnit+1;
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stateset->setTextureAttributeAndModes(transferFunctionTextureUnit, tf_texture.get(), osg::StateAttribute::ON);
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stateset->setTextureAttributeAndModes(transferFunctionTextureUnit, tf_texture.get(), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE);
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stateset->addUniform(new osg::Uniform("tfTexture",int(transferFunctionTextureUnit)));
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stateset->addUniform(new osg::Uniform("tfOffset",tfOffset));
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stateset->addUniform(new osg::Uniform("tfScale",tfScale));
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@ -487,12 +489,13 @@ void MultipassTechnique::init()
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#endif
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osg::ref_ptr<osg::Shader> back_main_fragmentShader = osgDB::readRefShaderFile(osg::Shader::FRAGMENT, "shaders/volume_multipass_back.frag");
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osg::ref_ptr<osg::Shader> back_main_fragmentShader = osgDB::readRefShaderFile(osg::Shader::FRAGMENT, "shaders/volume_multipass_back_with_front_depthtexture.frag");;
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//osg::ref_ptr<osg::Shader> back_main_fragmentShader = osgDB::readRefShaderFile(osg::Shader::FRAGMENT, "shaders/volume_multipass_back.frag");
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#if 0
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if (!back_main_fragmentShader)
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{
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#include "Shaders/volume_multipass_back_frag.cpp"
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back_main_fragmentShader = new osg::Shader(osg::Shader::VERTEX, volume_multipass_back_frag));
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#include "Shaders/shaders/volume_multipass_back_with_front_depthtexture_frag.cpp"
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back_main_fragmentShader = new osg::Shader(osg::Shader::VERTEX, volume_multipass_back_with_front_depthtexture_frag));
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}
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#endif
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@ -502,7 +505,7 @@ void MultipassTechnique::init()
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osg::ref_ptr<osg::StateSet> front_stateset_prototype = new osg::StateSet;
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osg::ref_ptr<osg::Program> front_program_prototype = new osg::Program;
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{
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front_stateset_prototype->setAttributeAndModes(front_CullFace.get(), osg::StateAttribute::ON);
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front_stateset_prototype->setAttributeAndModes(front_CullFace.get(), osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
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front_program_prototype->addShader(main_vertexShader.get());
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front_program_prototype->addShader(front_main_fragmentShader.get());
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@ -512,13 +515,28 @@ void MultipassTechnique::init()
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osg::ref_ptr<osg::StateSet> back_stateset_prototype = new osg::StateSet;
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osg::ref_ptr<osg::Program> back_program_prototype = new osg::Program;
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{
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back_stateset_prototype->setAttributeAndModes(back_CullFace.get(), osg::StateAttribute::ON);
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back_stateset_prototype->setAttributeAndModes(back_CullFace.get(), osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
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back_program_prototype->addShader(main_vertexShader.get());
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back_program_prototype->addShader(back_main_fragmentShader.get());
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back_program_prototype->addShader(computeRayColorShader.get());
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}
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// set up the rendering of the front face
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{
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_frontFaceStateSet = new osg::StateSet;
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// cull only the bac faces so we write only the front
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_frontFaceStateSet->setAttributeAndModes(front_CullFace.get(), osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
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// set up the front falce
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osg::ref_ptr<osg::Program> program = new osg::Program;
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program->addShader(main_vertexShader.get());
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_frontFaceStateSet->setAttribute(program.get(), osg::StateAttribute::ON|osg::StateAttribute::OVERRIDE);
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}
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// STANDARD_SHADERS
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{
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// STANDARD_SHADERS without TransferFunction
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@ -690,7 +708,6 @@ void MultipassTechnique::init()
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if (cpv._sampleRatioWhenMovingProperty.valid())
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{
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_whenMovingStateSet = new osg::StateSet;
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//_whenMovingStateSet->setTextureAttributeAndModes(volumeTextureUnit, new osg::TexEnvFilter(1.0));
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_whenMovingStateSet->addUniform(cpv._sampleRatioWhenMovingProperty->getUniform(), osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON);
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}
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@ -701,14 +718,89 @@ void MultipassTechnique::update(osgUtil::UpdateVisitor* /*uv*/)
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// OSG_NOTICE<<"MultipassTechnique:update(osgUtil::UpdateVisitor* nv):"<<std::endl;
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}
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void MultipassTechnique::backfaceSubgraphCullTraversal(osgUtil::CullVisitor* cv)
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{
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if (!cv) return;
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cv->pushStateSet(_frontFaceStateSet.get());
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if (getVolumeTile()->getNumChildren()>0)
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{
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getVolumeTile()->osg::Group::traverse(*cv);
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}
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else
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{
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_transform->accept(*cv);
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}
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cv->popStateSet();
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}
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class RTTBackfaceCameraCullCallback : public osg::NodeCallback
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{
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public:
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RTTBackfaceCameraCullCallback(VolumeScene::TileData* tileData, MultipassTechnique* mt):
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_tileData(tileData),
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_mt(mt) {}
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virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
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{
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osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(nv);
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cv->pushProjectionMatrix(_tileData->projectionMatrix);
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_mt->backfaceSubgraphCullTraversal(cv);
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cv->popProjectionMatrix();
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}
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protected:
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virtual ~RTTBackfaceCameraCullCallback() {}
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osg::observer_ptr<osgVolume::VolumeScene::TileData> _tileData;
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osg::observer_ptr<osgVolume::MultipassTechnique> _mt;
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};
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void MultipassTechnique::cull(osgUtil::CullVisitor* cv)
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{
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std::string traversalPass;
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bool postTraversal = cv->getUserValue("VolumeSceneTraversal", traversalPass) && traversalPass=="Post";
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bool rttTraversal = cv->getUserValue("VolumeSceneTraversal", traversalPass) && traversalPass=="RenderToTexture";
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// OSG_NOTICE<<"MultipassTechnique::cull() traversalPass="<<traversalPass<<std::endl;
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osgVolume::VolumeScene* vs = 0;
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osg::NodePath& nodePath = cv->getNodePath();
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for(osg::NodePath::reverse_iterator itr = nodePath.rbegin();
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(itr != nodePath.rend()) && (vs == 0);
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++itr)
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{
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vs = dynamic_cast<osgVolume::VolumeScene*>(*itr);
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}
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if (postTraversal)
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if (rttTraversal)
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{
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if (vs)
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{
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VolumeScene::TileData* tileData = vs->tileVisited(cv, getVolumeTile());
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if (tileData->rttCamera.valid())
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{
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if (!(tileData->rttCamera->getCullCallback()))
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{
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tileData->rttCamera->setCullCallback(new RTTBackfaceCameraCullCallback(tileData, this));
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}
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// traverse RTT Camera
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tileData->rttCamera->accept(*cv);
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}
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osg::BoundingBox bb;
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if (_transform.valid()) bb.expandBy(_transform->getBound());
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if (getVolumeTile()->getNumChildren()>0) bb.expandBy(getVolumeTile()->getBound());
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cv->updateCalculatedNearFar(*(cv->getModelViewMatrix()),bb);
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}
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}
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else
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{
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int shaderMask = 0;
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@ -740,14 +832,27 @@ void MultipassTechnique::cull(osgUtil::CullVisitor* cv)
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}
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}
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int shaderMaskFront = shaderMask | FRONT_SHADERS;
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//int shaderMaskFront = shaderMask | FRONT_SHADERS;
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int shaderMaskBack = shaderMask | BACK_SHADERS;
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// OSG_NOTICE<<"shaderMaskFront "<<shaderMaskFront<<std::endl;
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// OSG_NOTICE<<"shaderMaskBack "<<shaderMaskBack<<std::endl;
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if (vs)
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{
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VolumeScene::TileData* tileData = vs->getTileData(cv, getVolumeTile());
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if (tileData)
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{
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Locator* layerLocator = _volumeTile->getLayer()->getLocator();
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osg::Matrix imv = layerLocator->getTransform() * (*(cv->getModelViewMatrix()));
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osg::Matrix inverse_imv;
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inverse_imv.invert(imv);
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tileData->texgenUniform->set(osg::Matrixf(inverse_imv));
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}
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}
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osg::ref_ptr<osg::StateSet> front_stateset = _stateSetMap[shaderMaskFront];
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//osg::ref_ptr<osg::StateSet> front_stateset = _stateSetMap[shaderMaskFront];
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osg::ref_ptr<osg::StateSet> back_stateset = _stateSetMap[shaderMaskBack];
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osg::ref_ptr<osg::StateSet> moving_stateset = (_whenMovingStateSet.valid() && isMoving(cv)) ? _whenMovingStateSet : 0;
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@ -757,6 +862,7 @@ void MultipassTechnique::cull(osgUtil::CullVisitor* cv)
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cv->pushStateSet(moving_stateset.get());
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}
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#if 0
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if (front_stateset.valid())
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{
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// OSG_NOTICE<<"Have front stateset"<<std::endl;
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@ -764,12 +870,23 @@ void MultipassTechnique::cull(osgUtil::CullVisitor* cv)
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_transform->accept(*cv);
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cv->popStateSet();
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}
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#endif
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if (back_stateset.valid())
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{
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// OSG_NOTICE<<"Have back stateset"<<std::endl;
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cv->pushStateSet(back_stateset.get());
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cv->pushStateSet(_volumeRenderStateSet.get());
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if (getVolumeTile()->getNumChildren()>0)
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{
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getVolumeTile()->osg::Group::traverse(*cv);
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}
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else
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{
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_transform->accept(*cv);
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}
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cv->popStateSet();
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cv->popStateSet();
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}
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@ -779,21 +896,6 @@ void MultipassTechnique::cull(osgUtil::CullVisitor* cv)
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cv->popStateSet();
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}
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}
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else
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{
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osg::NodePath& nodePath = cv->getNodePath();
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for(osg::NodePath::reverse_iterator itr = nodePath.rbegin();
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itr != nodePath.rend();
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++itr)
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{
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osgVolume::VolumeScene* vs = dynamic_cast<osgVolume::VolumeScene*>(*itr);
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if (vs)
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{
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vs->tileVisited(cv, getVolumeTile());
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break;
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}
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}
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}
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}
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void MultipassTechnique::cleanSceneGraph()
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@ -45,7 +45,6 @@ class RTTCameraCullCallback : public osg::NodeCallback
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virtual ~RTTCameraCullCallback() {}
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osgVolume::VolumeScene* _volumeScene;
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};
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@ -81,11 +80,8 @@ VolumeScene::~VolumeScene()
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{
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}
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void VolumeScene::tileVisited(osg::NodeVisitor* nv, osgVolume::VolumeTile* tile)
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VolumeScene::TileData* VolumeScene::tileVisited(osgUtil::CullVisitor* cv, osgVolume::VolumeTile* tile)
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{
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osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(nv);
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if (cv)
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{
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osg::ref_ptr<ViewData> viewData;
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{
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@ -93,27 +89,112 @@ void VolumeScene::tileVisited(osg::NodeVisitor* nv, osgVolume::VolumeTile* tile)
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viewData = _viewDataMap[cv];
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}
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//osg::BoundingBox bb(0.0f,0.0f,0.0f,1.0f,1.0f,1.0f);
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//cv->updateCalculatedNearFar(*(cv->getModelViewMatrix()),bb);
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if (viewData.valid())
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{
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int textureWidth = 512;
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int textureHeight = 512;
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osg::Viewport* viewport = cv->getCurrentRenderStage()->getViewport();
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if (viewport)
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{
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textureWidth = viewport->width();
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textureHeight = viewport->height();
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}
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osg::ref_ptr<TileData>& tileData = viewData->_tiles[tile];
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if (!tileData) tileData = new TileData;
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if (!tileData)
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{
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tileData = new TileData;
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tileData->depthTexture = new osg::Texture2D;
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tileData->depthTexture->setTextureSize(textureWidth, textureHeight);
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tileData->depthTexture->setInternalFormat(GL_DEPTH_COMPONENT);
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tileData->depthTexture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR);
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tileData->depthTexture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
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tileData->depthTexture->setWrap(osg::Texture2D::WRAP_S,osg::Texture2D::CLAMP_TO_BORDER);
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tileData->depthTexture->setWrap(osg::Texture2D::WRAP_T,osg::Texture2D::CLAMP_TO_BORDER);
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tileData->depthTexture->setBorderColor(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
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tileData->rttCamera = new osg::Camera;
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tileData->rttCamera->attach(osg::Camera::DEPTH_BUFFER, tileData->depthTexture.get());
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tileData->rttCamera->setViewport(0,0,textureWidth,textureHeight);
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// clear the depth and colour bufferson each clear.
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tileData->rttCamera->setClearMask(GL_DEPTH_BUFFER_BIT);
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// set the camera to render before the main camera.
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tileData->rttCamera->setRenderOrder(osg::Camera::PRE_RENDER);
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// tell the camera to use OpenGL frame buffer object where supported.
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tileData->rttCamera->setRenderTargetImplementation(osg::Camera::FRAME_BUFFER_OBJECT);
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tileData->rttCamera->setReferenceFrame(osg::Transform::RELATIVE_RF);
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tileData->rttCamera->setProjectionMatrix(osg::Matrixd::identity());
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tileData->rttCamera->setViewMatrix(osg::Matrixd::identity());
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tileData->stateset = new osg::StateSet;
|
||||
tileData->stateset->setTextureAttribute(2, tileData->depthTexture.get());
|
||||
|
||||
tileData->texgenUniform = new osg::Uniform("texgen2",osg::Matrixf());
|
||||
tileData->stateset->addUniform(tileData->texgenUniform);
|
||||
}
|
||||
|
||||
tileData->active = true;
|
||||
tileData->nodePath = cv->getNodePath();
|
||||
tileData->projectionMatrix = cv->getProjectionMatrix();
|
||||
tileData->modelviewMatrix = cv->getModelViewMatrix();
|
||||
|
||||
|
||||
if (tileData->depthTexture.valid())
|
||||
{
|
||||
if (tileData->depthTexture->getTextureWidth()!=textureWidth || tileData->depthTexture->getTextureHeight()!=textureHeight)
|
||||
{
|
||||
OSG_NOTICE<<"Need to change texture size to "<<textureHeight<<", "<<textureWidth<<std::endl;
|
||||
tileData->depthTexture->setTextureSize(textureWidth, textureHeight);
|
||||
tileData->rttCamera->setViewport(0, 0, textureWidth, textureHeight);
|
||||
if (tileData->rttCamera->getRenderingCache())
|
||||
{
|
||||
tileData->rttCamera->getRenderingCache()->releaseGLObjects(0);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
osg::BoundingBox bb(0.0f,0.0f,0.0f,1.0f,1.0f,1.0f);
|
||||
cv->updateCalculatedNearFar(*(cv->getModelViewMatrix()),bb);
|
||||
return tileData.get();
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
VolumeScene::TileData* VolumeScene::getTileData(osgUtil::CullVisitor* cv, osgVolume::VolumeTile* tile)
|
||||
{
|
||||
osg::ref_ptr<ViewData> viewData;
|
||||
{
|
||||
OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_viewDataMapMutex);
|
||||
viewData = _viewDataMap[cv];
|
||||
}
|
||||
|
||||
if (!viewData) return 0;
|
||||
|
||||
Tiles::iterator itr = viewData->_tiles.find(tile);
|
||||
return (itr != viewData->_tiles.end()) ? itr->second.get() : 0;
|
||||
}
|
||||
|
||||
void VolumeScene::traverse(osg::NodeVisitor& nv)
|
||||
{
|
||||
osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(&nv);
|
||||
if (cv)
|
||||
if (!cv)
|
||||
{
|
||||
Group::traverse(nv);
|
||||
return;
|
||||
}
|
||||
|
||||
// Save current cull settings
|
||||
osg::CullSettings saved_cull_settings(*cv);
|
||||
|
||||
// cv->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
|
||||
|
||||
osg::ref_ptr<ViewData> viewData;
|
||||
bool initializeViewData = false;
|
||||
{
|
||||
@ -374,11 +455,9 @@ void VolumeScene::traverse(osg::NodeVisitor& nv)
|
||||
TileData* tileData = itr->second.get();
|
||||
if (!tileData || !(tileData->active))
|
||||
{
|
||||
OSG_NOTICE<<"Skipping TileData that is inactive : "<<tileData<<std::endl;
|
||||
OSG_INFO<<"Skipping TileData that is inactive : "<<tileData<<std::endl;
|
||||
continue;
|
||||
}
|
||||
OSG_NOTICE<<"Handling TileData that is active : "<<tileData<<std::endl;
|
||||
|
||||
|
||||
unsigned int numStateSetPushed = 0;
|
||||
|
||||
@ -395,6 +474,8 @@ void VolumeScene::traverse(osg::NodeVisitor& nv)
|
||||
cv->pushStateSet(viewData->_stateset.get());
|
||||
++numStateSetPushed;
|
||||
|
||||
cv->pushStateSet(tileData->stateset.get());
|
||||
++numStateSetPushed;
|
||||
|
||||
osg::NodePath::iterator np_itr = nodePath.begin();
|
||||
|
||||
@ -427,10 +508,14 @@ void VolumeScene::traverse(osg::NodeVisitor& nv)
|
||||
cv->popProjectionMatrix();
|
||||
}
|
||||
|
||||
// need to synchronize projection matrices:
|
||||
// current CV projection matrix
|
||||
// main scene RTT Camera projection matrix
|
||||
// each tile RTT Camera
|
||||
// each tile final render.
|
||||
|
||||
cv->getNodePath() = nodePathPriorToTraversingSubgraph;
|
||||
}
|
||||
else
|
||||
{
|
||||
Group::traverse(nv);
|
||||
}
|
||||
|
||||
// restore the previous cull settings
|
||||
cv->setCullSettings(saved_cull_settings);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user