|
Hi, Robert. I'm the user. It's very easy to render to 3D texture. By reading NVIDIA SDK 10, we should know each render pass render a scene to a slice. So, we can do this in OSG by setting numbers of camera. OSG camera code has a function: camera->attach(Camera::COLOR_BUFFER, txt3D.get(), 0, z, false); the 4th parameter is the slice number you want to render. So the entire scene graph will be: ROOT Camera1 Camera2 ..... CameraN Scene Scene Scene each camera attach to a slice, and it will be OK. Regards, Hesicong Http://www.hesicong.net Robert Osfield wrote: Hi Omar, I haven't personally tested render to texture (RTT) with Texture3D yet, but in theory all the wiring for it is in place. A couple of months back I recall another user initially trying to RTT with Texture3D and found problems, but I believe he got things working in the end. Hopefully the user in question with spot this thread and provide us some insight.OSG wise I think it'd be useful to modify and existing example, or perhaps write a new one that tests this particular feature, then we can use this as test bed to get the feature fully working, as well as provide guidance to others trying to solve similar tasks. Robert. On Thu, Jun 19, 2008 at 3:48 PM, Omar <[EMAIL PROTECTED]> wrote:Hello Im trying to setup a RTT to a 3D texture. However i cant see any changes to the texture when i render to it. Im attaching texture3D a 4 layer 3D texture(diffrent image on each slice). This is rendered on a quad; all of this works fine. Both the quad and the texture3D are made in createModel(); which i wont paste here because it is the same as the 3D texture example. This texture3D is rendered to by a RTT camera, the camera has no children so it should render the clear colour of bright green? (even when it has children it doesnt change the texture its rendering to), as in the code below it should make slice 1 a bright green colour if the RTT works. Unfortunatly i just get the same 4 layers i started with, the RTT doesnt change the texture. osg::Node* node =createModel(); osg::Camera* camera = new osg::Camera; camera->setClearColor(osg::Vec4(0.1f,1.0f,0.3f,1.0f)); camera->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // set viewport camera->setViewport(0,0,texture3D->getTextureWidth(),texture3D->getTextureHeight()); camera->setRenderTargetImplementation(osg::Camera::FRAME_BUFFER_OBJECT); camera->setRenderOrder(osg::Camera::PRE_RENDER); camera->attach (osg::Camera::COLOR_BUFFER ,texture3D,0,1,false); osg::Group*root = new osg::Group(); root->addChild(node); //camera->addChild(node); root->addChild(camera); viewer->setSceneData(root); return viewer->run(); _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org_______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org |
_______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
