Hi all,
We are having problems with our application running in stereo (for
displaying in our CAVE) under WindowsXP.
Our clustermaster (NVidia 8600) serves 4 slaves (NVidia Quadro 5600). The
8600 doesn't have a stereo option, but we have set the 5600's to run in
stereo.
However, we get the following message every frame on all slaves:
WARNING:
(d:\opensg-dailybuild\opensg\source\system\action\renderaction\osgRenderAction.cpp,2301):
RenderAction: precheck failed: invalid operation (0x502)
This points to glErr("RenderAction: precheck"); in osgRenderAction.cpp
We are using the OpenSG dailybuild downloaded recently from the CVS.
I ran GLIntercept debugger and the interesting part of the (looping, once
per rendercall) message is this:
glDrawBuffer(GL_BACK)
glReadBuffer(GL_BACK)
glDrawBuffer(GL_BACK_RIGHT) glGetError() =GL_INVALID_OPERATION
glReadBuffer(GL_BACK_RIGHT) glGetError() =GL_INVALID_OPERATION
glViewport(0,0,301,301)
glScissor(0,0,301,301)
glEnable(GL_SCISSOR_TEST)
glGetError()=GL_INVALID_OPERATION
glGetError()=GL_NO_ERROR
So there is a problem with calling the Right Back Buffer. The Left Buffer is
drawn before the right and no errors occur.
We then ran some OpenGL diagnosis tools to check that stereo is working on
the slaves (redblue.exe from
http://www.reald-corporate.com/scientific/downloadsredblue.zip). These tests
succeed.
Our system operates fine on our Prism Linix system, which uses GLUT.
However, the Windows version we use FreeGLUT.
I can post the entire error message if required, but will not do that until
someone asks as it is quite long :)
Can anyone help us?
Thanks!
--
------------------------------------------------------------------
William Steptoe
Computer Graphics and Virtual Environments
Department of Computer Science,
University College London.
Web: www.cs.ucl.ac.uk/staff/w.steptoe
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