Hi David, The OSG tries to hide the complexity of managing FBO/pbuffers etc, juggling the extra option of handling externally defined FBOs does rather complicate things even further - and is not support as is, and I don't feel its appropriate either as it'll just make managing the API and backend pretty horrible.
If you really really have to do it then I'd suggest try subclassing from FBO and bind in your own FBO objects. Robert. On Mon, Aug 18, 2008 at 10:48 PM, David Guthrie <[EMAIL PROTECTED]> wrote: > > I have an external library that wants to create a frame buffer object into > which I render something using osg, then it will do post-processing on it. I > have a specific camera that I want to have render into that buffer, but I > can't seem to find any way that I can assign an externally created frame > buffer object to a camera. I can hack it by having it create the buffer in a > pre-draw callback, but if I try to do any rendering with an nested camera, > OSG clearly can't set the state back correctly, plus I get OpenGL errors even > if it works when it tries to set the draw and read buffers. > > I looked at the render stage, on which I can set a frame buffer object, but > creating a renderstage for a camera is rather convoluted with the render > stage cache on the camera, and it looks like the api doesn't really want me > to do that. Even if that problem is solved, I can't give the > osg::FrameBufferObject an id to use, it wants to create its own buffer. > > Is there any way I can solve this? I would like to avoid modifying osg if I > can. If I can't, do you have an suggestions on how I should change it? > > I'm using OSG 2.4 ATM. > > -- > David Guthrie > [EMAIL PROTECTED] > Alion Science and Technology > BMH Operation - A CMMI Maturity Level 3 Organization > 5365 Robin Hood Road, Suite 100 > Norfolk, VA 23513-2416 > (757) 857-5670, ext 269, Fax (757) 857-6781 > _______________________________________________ > 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
