Clearing the modelview and projection matrices helped a great deal. Thanks hybr! It now works as intended ... up to a point that is difficult to explain.
I get the digital zoom effect until about 13x. At that point, the video suddenly starts translating instead of zooming. And instead of showing video that is off-center (which would still be confusing and wrong to me since there is nothing that is doing a translation), the video is still clipped such that inside my stencil quad I see a repeat of other items in the application (I get buttons and such drawing in my video quad). If I disable the GL_STENCIL_TEST now, the video viewport grows exactly as expected. At some point, it does grow beyond the size of my application window. Perhaps this is a problem for the stencil for some reason? Can anyone provide additional insight for me? Thanks again! Doug ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=46349#46349 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org

