Added initial render to texture functionality into osgVolume::VolumeScene
This commit is contained in:
Robert Osfield
parent
f02ed3c629
commit
4fcf8d3e86
@ -49,6 +49,7 @@
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#include <osgGA/TrackballManipulator>
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#include <osgGA/FlightManipulator>
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#include <osgGA/KeySwitchMatrixManipulator>
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#include <osgGA/StateSetManipulator>
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#include <osgUtil/CullVisitor>
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@ -490,6 +491,9 @@ int main( int argc, char **argv )
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// add the stats handler
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viewer.addEventHandler(new osgViewer::StatsHandler);
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// add stateset manipulator
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viewer.addEventHandler(new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()));
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viewer.getCamera()->setClearColor(osg::Vec4(0.0f,0.0f,0.0f,0.0f));
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// if user request help write it out to cout.
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@ -1225,6 +1229,8 @@ int main( int argc, char **argv )
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}
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// set the scene to render
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viewer.setSceneData(loadedModel.get());
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@ -15,6 +15,8 @@
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#define OSGVOLUMESCENE 1
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#include <osg/Group>
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#include <osg/Texture2D>
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#include <osgUtil/CullVisitor>
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#include <osgVolume/Export>
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namespace osgVolume {
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@ -37,6 +39,22 @@ class OSGVOLUME_EXPORT VolumeScene : public osg::Group
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virtual ~VolumeScene();
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class ViewData : public osg::Referenced
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{
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public:
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ViewData();
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osg::ref_ptr<osg::Texture2D> _depthTexture;
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osg::ref_ptr<osg::Texture2D> _colorTexture;
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osg::ref_ptr<osg::Camera> _rttCamera;
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osg::ref_ptr<osg::Camera> _postCamera;
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osg::ref_ptr<osgUtil::RenderStage> _parentRenderStage;
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protected:
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virtual ~ViewData() {}
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};
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typedef std::map< osgUtil::CullVisitor*, osg::ref_ptr<ViewData> > ViewDataMap;
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OpenThreads::Mutex _viewDataMapMutex;
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ViewDataMap _viewDataMap;
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};
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}
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@ -12,10 +12,50 @@
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*/
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#include <osgVolume/VolumeScene>
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#include <osg/Geometry>
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#include <osg/Geode>
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#include <OpenThreads/ScopedLock>
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using namespace osgVolume;
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class RTTCameraCullCallback : public osg::NodeCallback
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{
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public:
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RTTCameraCullCallback(VolumeScene* vs):
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_volumeScene(vs) {}
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virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
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{
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#if 1
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_volumeScene->osg::Group::traverse(*nv);
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#else
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osg::Group* group = dynamic_cast<osg::Group*>(node);
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if (group)
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{
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OSG_NOTICE<<"Traversing RTT subgraph, "<<group->className()<<", "<<nv->className()<<std::endl;
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group->osg::Group::traverse(*nv);
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}
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else
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{
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OSG_NOTICE<<"Can't traverse RTT subgraph"<<std::endl;
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}
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#endif
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}
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protected:
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virtual ~RTTCameraCullCallback() {}
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osgVolume::VolumeScene* _volumeScene;
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};
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VolumeScene::ViewData::ViewData()
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{
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}
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VolumeScene::VolumeScene()
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{
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}
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@ -30,7 +70,102 @@ VolumeScene::~VolumeScene()
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{
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}
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void VolumeScene::traverse(osg::NodeVisitor& nv)
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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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OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_viewDataMapMutex);
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osg::ref_ptr<ViewData>& viewData = _viewDataMap[cv];
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if (!viewData)
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{
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OSG_NOTICE<<"Creating ViewData"<<std::endl;
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unsigned textureWidth = 512;
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unsigned textureHeight = 512;
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viewData = new ViewData;
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// set up depth texture
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viewData->_depthTexture = new osg::Texture2D;
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viewData->_depthTexture->setTextureSize(textureWidth, textureHeight);
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viewData->_depthTexture->setInternalFormat(GL_DEPTH_COMPONENT);
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viewData->_depthTexture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR);
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viewData->_depthTexture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
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viewData->_depthTexture->setWrap(osg::Texture2D::WRAP_S,osg::Texture2D::CLAMP_TO_BORDER);
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viewData->_depthTexture->setWrap(osg::Texture2D::WRAP_T,osg::Texture2D::CLAMP_TO_BORDER);
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viewData->_depthTexture->setBorderColor(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
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// set up color texture
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viewData->_colorTexture = new osg::Texture2D;
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viewData->_colorTexture->setTextureSize(textureWidth, textureHeight);
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viewData->_colorTexture->setInternalFormat(GL_RGBA);
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viewData->_colorTexture->setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::LINEAR);
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viewData->_colorTexture->setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::LINEAR);
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viewData->_colorTexture->setWrap(osg::Texture2D::WRAP_S,osg::Texture2D::CLAMP_TO_BORDER);
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viewData->_colorTexture->setWrap(osg::Texture2D::WRAP_T,osg::Texture2D::CLAMP_TO_BORDER);
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viewData->_colorTexture->setBorderColor(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
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// set up the RTT Camera to capture the main scene to a color and depth texture that can be used in post processing
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viewData->_rttCamera = new osg::Camera;
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viewData->_rttCamera->attach(osg::Camera::DEPTH_BUFFER, viewData->_depthTexture.get());
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viewData->_rttCamera->attach(osg::Camera::COLOR_BUFFER, viewData->_colorTexture.get());
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viewData->_rttCamera->setCullCallback(new RTTCameraCullCallback(this));
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viewData->_rttCamera->setViewport(0,0,textureWidth,textureHeight);
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// clear the depth and colour bufferson each clear.
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viewData->_rttCamera->setClearMask(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
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// set the camera to render before the main camera.
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viewData->_rttCamera->setRenderOrder(osg::Camera::PRE_RENDER);
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viewData->_rttCamera->setClearColor(osg::Vec4(1.0,0.5,0.5,1.0));
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// tell the camera to use OpenGL frame buffer object where supported.
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viewData->_rttCamera->setRenderTargetImplementation(osg::Camera::FRAME_BUFFER_OBJECT);
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viewData->_rttCamera->setReferenceFrame(osg::Transform::RELATIVE_RF);
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viewData->_rttCamera->setProjectionMatrix(osg::Matrixd::identity());
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viewData->_rttCamera->setViewMatrix(osg::Matrixd::identity());
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// create mesh for rendering the RTT textures onto the screen
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osg::ref_ptr<osg::Geode> geode = new osg::Geode;
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geode->addDrawable(osg::createTexturedQuadGeometry(osg::Vec3(-1.0f,-1.0f,-1.0f),osg::Vec3(2.0f,0.0f,-1.0f),osg::Vec3(0.0f,2.0f,-1.0f)));
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//geode->getOrCreateStateSet()->setTextureAttributeAndModes(0, viewData->_colorTexture.get(), osg::StateAttribute::ON);
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geode->getOrCreateStateSet()->setTextureAttributeAndModes(0, viewData->_depthTexture.get(), osg::StateAttribute::ON);
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geode->getOrCreateStateSet()->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
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geode->getOrCreateStateSet()->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
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viewData->_postCamera = new osg::Camera;
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viewData->_postCamera->setReferenceFrame(osg::Camera::ABSOLUTE_RF);
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viewData->_postCamera->addChild(geode);
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}
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else
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{
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OSG_NOTICE<<"Reusing ViewData"<<std::endl;
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}
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viewData->_parentRenderStage = cv->getCurrentRenderStage();
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OSG_NOTICE<<"Ready to traverse RTT Camera"<<std::endl;
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viewData->_rttCamera->accept(nv);
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OSG_NOTICE<<"Ready to traverse POST Camera"<<std::endl;
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viewData->_postCamera->accept(nv);
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}
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else
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{
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Group::traverse(nv);
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}
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}
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