Mathias Buhr wrote: > Hi everyone, > > I'm trying to use the stencil buffer to render only parts of the final > image through other graph-attached cameras. The app works fine on ATI > hardware but NVIDIA fails. OpenGL reports that the stencil buffer has > only 0 bits (which is 8 bits on ATI, via > glGetInterv(GL_STENCIL_BUFFER_BITS) in a DrawCallback). I have tested > this on various linux boxes (Ubuntu 9.04, Fedora 11) with recent > hardware and recent drivers. > I'm pretty sure that a stencil buffer is available on this hardware > because OSG seems to be able to utilize it (stereo-mode in > osgUtil::SceneView uses stenciling and works fine). I'm pretty sure I've > missed something. Is there anything special to do to get or enable a > stencil buffer on Nvidia?
My OSG application uses a stencil buffer on Nvidia hardware, so it is definitely possible. There should be a mechanism (depending on how you create your context) to request a stencil-buffer-enabled context. I'm using FLTK to create my OpenGL context, so my code's example might not be useful to you. It looks like osg/DisplaySettings has a method setMinimumNumStencilBits that may be helpful to you. You could also look at the osgreflect demo. -Eric _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
