Hi Brad, Does it happen in state.applyMode( GL_SCISSOR_TEST ) call inside RenderStage::drawImplementation method ? I saw such errors when RenderStage buffer (FBO/PBuffer) initialization went wrong. It just happens that GL_SCISSOR_TEST is first mode that is applied after RenderStage buffer intialization and apparently error during the buffer initalization may be mistakenly interpreted as glScissor issue when scissor is applied and tests glError. In fact, if RenderBuffer was not applied correctly it may be the case where passed scissor area rectangle may not match previously set RenderBuffer and will produce an error as well, but even then, it will be secondary issue to Render Buffer inititalization failure.
I often use glIntercept to see what really happen in OpenGL under OSG wrapping. glIntercept does not work with multithreading but produces fairly well, informal logs when osgViewer is run in --SingleThreaded mode. Cheers, Wojtek ----- Original Message ----- From: Brad Huber To: [email protected] Sent: Wednesday, September 09, 2009 10:27 PM Subject: [osg-users] GL_SCISSOR_TEST error Hello, I seem to be getting the error "Warning: detected OpenGL error 'invalid value' after applying GLMode" which has been mentioned in other threads. After setting the OSG_GL_ERROR_CHECKING environment variable to ONCE_PER_ATTRIBUTE I get the more descriptive string "Warning: detected OpenGL error 'invalid value' after applying GLMode 0xc11" This code corresponds to GL_SCISSOR_TEST mode. When this warning is printed I traced up the call stack to see that it's from the call state.applyMode( GL_SCISSOR_TEST, true ); in osg::RenderStage::drawImplementation. My question is does anyone know why I would be getting this message with GL_SCISSOR_TEST? This test is being run on an older machine with an Intel 815 GM graphics chip. Is it possible scissor isn't supported or something? PS I'm using rev 10555 of OSG from the trunk Thanks in advance, -Brad ------------------------------------------------------------------------------ _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
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