Hi Julien, I am away from my computer so can't look at you whole post. You description it sound rather like the osgVolume::MultiPassTechnique now part of The svn/trunk version of the Osg.
Robert On 28 Nov 2014 19:50, "Julien Valentin" <[email protected]> wrote: > Hi, > In the frame of mixed geometry/volume rendering, i would like to create > depthtexture for a subgraph..this texture is used to stop forward raycast > of the volume. > In order to do that i would like to: > 1)Render subgraph in a fbo with 3 attachements > -depth to renderbuffer > -depth to texture > -color to renderbuffer > 2)Copy back depth and color render buffers from the fbo to the frame > buffer (using glblitframebuffer) > > > Here my current code > > Code: > > class OSGMULTIGRID_EXPORT RenderDepth2Texture : public osg::Group{ > public: > virtual bool addChild(osg::Node*n); > RenderDepth2Texture(); > /** Copy constructor using CopyOp to manage deep vs > shallow copy.*/ > > > inline osg::Texture2D*getDepthTexture()const{ return > _depthtexture; } > inline osg::Uniform*getDepthResolutionUniform()const{ > return _rdx; } > void setRasterizationResolution(const osg::Vec2ui&); > const osg::Vec2ui & getRasterizationResolution()const { > return _resolution; } > > virtual void traverse(osg::NodeVisitor &nv); > osg::ref_ptr<osg::Texture2D> _depthtexture,_colortexture; > osg::Vec2ui _resolution; > osg::ref_ptr<osg::Camera> _camera; > osg::ref_ptr<osg::Uniform > _rdx; > }; > class PreDrawFBOCallback : public osg::Camera::DrawCallback > { > public: > PreDrawFBOCallback(osg::FrameBufferObject* fbo, > osg::FrameBufferObject* source_fbo, unsigned int width, unsigned int > height, osg::Texture2D *dt, osg::Texture2D *ct) : > _fbo(fbo), _source_fbo(source_fbo), _depthTexture(dt), > _colorTexture(ct), _width(width), _height(height) {} > > virtual void operator () (osg::RenderInfo& renderInfo) const > { > cerr << "PreDrawFBOCallback" << endl; > // switching only the frame buffer attachments is actually > faster than switching the framebuffer > #ifdef USE_PACKED_DEPTH_STENCIL > #ifdef USE_TEXTURE_RECTANGLE > > _fbo->setAttachment(osg::Camera::PACKED_DEPTH_STENCIL_BUFFER, > osg::FrameBufferAttachment((osg::TextureRectangle*)(_depthTexture.get()))); > #else > > _fbo->setAttachment(osg::Camera::PACKED_DEPTH_STENCIL_BUFFER, > osg::FrameBufferAttachment((osg::Texture2D*)(_depthTexture.get()))); > > _fbo->setAttachment(osg::Camera::PACKED_DEPTH_STENCIL_BUFFER, > osg::FrameBufferAttachment(new osg::RenderBuffer(_width, _height, > GL_DEPTH24_STENCIL8_EXT)));// A16))); > #endif > #else > #ifdef USE_TEXTURE_RECTANGLE > _fbo->setAttachment(osg::Camera::DEPTH_BUFFER, > osg::FrameBufferAttachment((osg::TextureRectangle*)(_depthTexture.get()))); > #else > _fbo->setAttachment(osg::Camera::DEPTH_BUFFER, > osg::FrameBufferAttachment(_depthTexture.get()));// > osg::FrameBufferAttachment(new osg::RenderBuffer(_width, _height, > GL_RGBA16))); > #endif > #endif > #ifdef USE_TEXTURE_RECTANGLE > _fbo->setAttachment(osg::Camera::COLOR_BUFFER0, > osg::FrameBufferAttachment((osg::TextureRectangle*)(_colorTexture.get()))); > #else > _fbo->setAttachment(osg::Camera::COLOR_BUFFER0, > osg::FrameBufferAttachment((_colorTexture.get())));// > osg::FrameBufferAttachment(new osg::RenderBuffer(_width, _height, > GL_DEPTH_COMPONENT16_ARB))); > > _fbo->setAttachment(osg::Camera::COLOR_BUFFER, > osg::FrameBufferAttachment(new osg::RenderBuffer(_width, _height, > GL_RGBA)));// A16))); > #endif > /* > // check if we need to do some depth buffer copying from a > source FBO into the current FBO > if (_source_fbo.get() != NULL) > { > osg::FBOExtensions* fbo_ext = > osg::FBOExtensions::instance(renderInfo.getContextID(), true); > bool fbo_supported = fbo_ext && fbo_ext->isSupported(); > if (fbo_supported && fbo_ext->glBlitFramebuffer) > { > // blit the depth buffer from the solid geometry fbo into > the current transparency fbo > (_fbo.get())->apply(*renderInfo.getState(), > osg::FrameBufferObject::DRAW_FRAMEBUFFER); > (_source_fbo.get())->apply(*renderInfo.getState(), > osg::FrameBufferObject::READ_FRAMEBUFFER); > > // glReadBuffer(GL_COLOR_ATTACHMENT0_EXT); // > only needed to blit the color buffer > // glDrawBuffer(GL_COLOR_ATTACHMENT0_EXT); // > only needed to blit the color buffer > fbo_ext->glBlitFramebuffer( > 0, 0, static_cast<GLint>(_width), > static_cast<GLint>(_height), > 0, 0, static_cast<GLint>(_width), > static_cast<GLint>(_height), > #ifdef USE_PACKED_DEPTH_STENCIL > GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT, GL_NEAREST); > #else > GL_DEPTH_BUFFER_BIT, GL_NEAREST); > #endif > (_fbo.get())->apply(*renderInfo.getState(), > osg::FrameBufferObject::READ_FRAMEBUFFER); > (_fbo.get())->apply(*renderInfo.getState(), > osg::FrameBufferObject::DRAW_FRAMEBUFFER); > } > }*/ > // switch to this fbo, if it isn't already bound > (_fbo.get())->apply(*renderInfo.getState());// , > osg::FrameBufferObject::READ_FRAMEBUFFER); > //(_fbo.get())->apply(*renderInfo.getState(), > osg::FrameBufferObject::DRAW_FRAMEBUFFER); > } > protected: > osg::ref_ptr<osg::FrameBufferObject> _fbo; > osg::ref_ptr<osg::FrameBufferObject> _source_fbo; > osg::ref_ptr<osg::Texture2D> _depthTexture; > osg::ref_ptr<osg::Texture2D> _colorTexture; > unsigned int _width; > unsigned int _height; > }; > > > class PostDrawFBOCallback : public osg::Camera::DrawCallback > { > public: > PostDrawFBOCallback(osg::FrameBufferObject* fbo, > osg::FrameBufferObject* source_fbo, unsigned int width, unsigned int > height, osg::Texture *dt, osg::Texture *ct) : > _fbo(fbo), _width(width), _height(height) { > // in order to select FrameBuffer instead of FBO > _dummyfbo = new osg::FrameBufferObject(); > } > virtual void operator () (osg::RenderInfo& renderInfo) const > { > cerr << "PostDrawFBOCallback" << endl; > osg::FBOExtensions* fbo_ext = > osg::FBOExtensions::instance(renderInfo.getContextID(), false); > > > > (_fbo.get())->apply(*renderInfo.getState(), > osg::FrameBufferObject::READ_FRAMEBUFFER); > (_dummyfbo.get())->apply(*renderInfo.getState(), > osg::FrameBufferObject::DRAW_FRAMEBUFFER); > //same as glBind(GL_DRAW_FRAMEBUFFER,0); > > fbo_ext->glBlitFramebuffer( > 0, 0, static_cast<GLint>(_width), > static_cast<GLint>(_height), > 0, 0, static_cast<GLint>(_width), > static_cast<GLint>(_height), > GL_COLOR_BUFFER_BIT, GL_NEAREST); > > fbo_ext->glBlitFramebuffer( > 0, 0, static_cast<GLint>(_width), > static_cast<GLint>(_height), > 0, 0, static_cast<GLint>(_width), > static_cast<GLint>(_height), > #ifdef USE_PACKED_DEPTH_STENCIL > GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT, > GL_NEAREST); > #else > GL_DEPTH_BUFFER_BIT, GL_NEAREST); > #endif > > ///restore fbo > (_dummyfbo.get())->apply(*renderInfo.getState(), > osg::FrameBufferObject::READ_FRAMEBUFFER); > > > } > protected: > bool _restore; > protected: > osg::ref_ptr<osg::FrameBufferObject> _fbo, _dummyfbo; > > unsigned int _width; > unsigned int _height; > }; > > RenderDepth2Texture::RenderDepth2Texture() :osg::Group() > { > > _camera = new osg::Camera(); > _camera->setClearColor(osg::Vec4(0, 1, 0, 1)); > _camera->setClearDepth(1); > > _camera->setAllowEventFocus(false); > > setCullingActive(false); > > > _rdx = new osg::Uniform(); > _rdx->setName("rviewport"); > _rdx->setType(osg::Uniform::FLOAT_VEC2); > > _resolution = osg::Vec2ui(0, 0); > _rdx->set(osg::Vec2f(1.0f / (float)_resolution.x(), 1.0f / > (float)_resolution.y())); > _colortexture = new osg::Texture2D(); > > _colortexture->setInternalFormat(GL_RGBA);// > GL_DEPTH_COMPONENT32_ARB perhaps ARB should be cool > _colortexture->setSourceFormat(GL_RGBA);//RGBA > _colortexture->setSourceType(GL_UNSIGNED_BYTE);//don give a shit > cause its not client data > > _colortexture->setDataVariance(osg::Texture2D::DYNAMIC); > _colortexture->setFilter(osg::Texture2D::MIN_FILTER, > osg::Texture2D::NEAREST); > _colortexture->setFilter(osg::Texture2D::MAG_FILTER, > osg::Texture2D::NEAREST); > > _depthtexture = new osg::Texture2D(); > > _depthtexture->setInternalFormat(GL_DEPTH_COMPONENT16_ARB);// > GL_DEPTH_COMPONENT32_ARB perhaps ARB should be cool > _depthtexture->setSourceFormat(GL_DEPTH_COMPONENT);//RGBA > _depthtexture->setSourceType(GL_UNSIGNED_BYTE);//don give a shit > cause its not client data > > _depthtexture->setDataVariance(osg::Texture2D::DYNAMIC); > _depthtexture->setFilter(osg::Texture2D::MIN_FILTER, > osg::Texture2D::NEAREST); > _depthtexture->setFilter(osg::Texture2D::MAG_FILTER, > osg::Texture2D::NEAREST); > #ifdef USE_PACKED_DEPTH_STENCIL > _depthtexture->setInternalFormat(GL_DEPTH24_STENCIL8_EXT); > _depthtexture->setSourceFormat(GL_DEPTH_STENCIL_EXT); > _depthtexture->setSourceType(GL_UNSIGNED_INT_24_8_EXT); > #else > _depthtexture->setInternalFormat(GL_DEPTH_COMPONENT); > #endif > > > > } > > > void RenderDepth2Texture::setRasterizationResolution(const osg::Vec2ui& > size) > { > _resolution = size; _rdx->set(osg::Vec2f(1.0f / > (float)_resolution.x(), 1.0f / (float)_resolution.y())); > _rdx->dirty(); > > _depthtexture->setTextureSize(_resolution.x(), _resolution.y()); > _colortexture->setTextureSize(_resolution.x(), _resolution.y()); > _colortexture->dirtyTextureObject(); > _depthtexture->dirtyTextureObject(); > > > } > bool RenderDepth2Texture::addChild(osg::Node*n){ > osg::Group::addChild(n);//dummy node for serialisaetion > return _camera->addChild(n);//real one > } > void RenderDepth2Texture::traverse(osg::NodeVisitor &nv) > { > // record the traversal mask on entry so we can reapply it later. > unsigned int traversalMask = nv.getTraversalMask(); > if (nv.getVisitorType() == osg::NodeVisitor::CULL_VISITOR) > { > osgUtil::CullVisitor* cv = > dynamic_cast<osgUtil::CullVisitor*>(&nv); > osg::Camera*cam = cv->getCurrentCamera(); > osg::Camera::Attachment attach = > cam->getBufferAttachmentMap()[osg::Camera::DEPTH_BUFFER]; > > unsigned int w, h; > w = cam->getViewport()->width(); > h = cam->getViewport()->height(); > > if (getRasterizationResolution() != osg::Vec2ui(w, h)){ > //no texture resoltuion changes fuck the stuff.. > _resolution > setRasterizationResolution > (osg::Vec2ui(w, h)); > //_camera = > (osg::Camera*)cam->clone(osg::CopyOp::DEEP_COPY_ALL); > osg::ref_ptr<osg::FrameBufferObject> fbo = new > osg::FrameBufferObject(); > _camera->setViewport(cam->getViewport()); > > _camera->setClearColor(osg::Vec4(0, 1, 0, 0)); > _camera->setClearDepth(1.0f); > #ifndef USE_PACKED_DEPTH_STENCIL > _camera->setClearMask(GL_DEPTH_BUFFER_BIT | > GL_COLOR_BUFFER_BIT); > #else > _camera->setClearMask(GL_DEPTH_BUFFER_BIT | > GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); > #endif > _camera->setPreDrawCallback(new > PreDrawFBOCallback(fbo, 0, w, h, _depthtexture, _colortexture)); > _camera->setFinalDrawCallback(new > PostDrawFBOCallback(fbo, 0, w, h, 0, 0)); > > > cam->getView()->addSlave(_camera, false); > /*for (int i = 0; i < getNumChildren(); i++) > _camera->addChild(getChild(i)); > */ > > _camera->dirtyBound(); > this->dirtyBound(); std::cerr << "ATTACHING DEPTH > TARGET TO CAMERA" << _camera->getNumChildren() << endl; > > } > > > > nv.apply(*_camera.get()); > > > > } > else nv.apply(*_camera.get()); > > } > > > > I took osgdepthpeeling as an example but i may missed something because it > s no working....I only getback the FBO clearColor to FrameBuffer as if > _camera haven't any children drawn ... > Note that I overload Group and delegate traversal to _camera...It's the > only way i found to retrieve the main view... > It's the first time I use a slave camera ...is there something i missed > All help is welcome > > Thank you! > > Cheers, > Julien [/code] > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=61914#61914 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org >
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