Hi Robert, Sorry for not being more specific. I am using "something else" (VTP) so I am driving osgUtil::SceneView from our own code. It is very old code in this area, we are still building against 2.6.0. However I had a quick check against the latest svn and as far as I can see the problem still exists. I patched a couple of places in RenderStage to check callingContext non NULL before using it, and things appear to work but I have not done a decent test. Also fixing it this was really worries me! if (_graphicsContext.valid() && callingContext &&_graphicsContext != callingContext) Roger Robert Osfield wrote: Hi Roger, What they of viewer code are you using? osgViewer? Something else?Robert. On Fri, Dec 5, 2008 at 1:53 PM, Roger James <[EMAIL PROTECTED]> wrote:I have an app which uses osg::Camera to render to a shadow map. This works fine until the I try to run it old hardware that does not support frame buffer objects and the render target falls back to a one which causes a seperate GraphicsContext to be set up. This means that the following piece of code in RenderStage::draw fails because callingContext is not a valid pointer. if (_graphicsContext.valid() && _graphicsContext != callingContext) { // show we release the context so that others can use it?? will do so right // now as an experiment. callingContext->releaseContext(); !!! Crashes here This is because _graphicsContext is being set to the context created in the runCameraSetup but callingContext is set to _renderInfo.getState()->getGraphicsContext() which has not been set up by osgUtil::SceneView. Do I need to fix this by putting a valid GraphicsConext in the Sceneview RenderInfo. If so how should I set that up (I have never bothered before). Or should I just modify the code in RenderStage::draw like this.. if (_graphicsContext.valid() && callingContext.valid() &&_graphicsContext != callingContext) Comments and ideas welcome. Thanks Roger |
_______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org