Hi Sebastian, Thanks for your answer.
Eventually I went with a another solution (copy a scaled-down texture), as copying with alternating PBOs always resulted in the texture after post-processing. Unfortunately I had no more time for this. It could be related to old hardware though (GeForce 8800). Thanks, Shahar Sebastian Messerschmidt wrote: > Hi Shahar, > > I guess your scene is being rendered to an FBO already. > So simply create a camera taking the resulting FBO as input, a new > texture as output an attach a simple glsl program to copy. > Also I guess osgPPU has some "copy" processor, but I'm not sure. > > cheers > Sebastian > > > Hi, > > > > I've got an OSG application with a single viewer and camera. The camera is > > set to render to FBO - > > > > > > Code: > > camera->attach(osg::Camera::COLOR_BUFFER0, m_texture2D); > > camera->setRenderTargetImplementation(osg::Camera::FRAME_BUFFER_OBJECT); > > > > > > > > Rendering consists of the following main steps: > > 1) Render scene > > 2) Post-processing using osgPPU > > 3) In final draw callback, copy the rendered image to the application using > > two alternating PBOs > > > > Now I'd like to add one more step - > > 1.5) Copy the rendered image to application before post-processing > > > > The copied image will only be used in the application (e.g. to save it), > > and will not be displayed nor copied back to the graphics card (like the > > osgprerender example). In addition, I don't mind getting it with a delay of > > a few frames. > > > > How would you recommend implementing this step efficiently, while > > maintaining the current performance level of the application (runs at 60Hz). > > I guess I could use two separate cameras to render the scene (one without > > osgPPU), but I wonder if there is a better way. > > > > Thanks, > > Shahar > > > > ------------------ > > Read this topic online here: > > http://forum.openscenegraph.org/viewtopic.php?p=55940#55940 > > > > > > > > > > > > _______________________________________________ > > osg-users mailing list > > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > > _______________________________________________ > osg-users mailing list > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > ------------------ > Post generated by Mail2Forum ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=56024#56024 _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
