Re: [PyOpenGL-Users] GLerror: [Errno 1281]

[Mike C. F. <mcf...@ro...>]

Lothar Birk wrote:

>Hi,
>
>first of all thanks, for the quick help on the "terminating
>the examples question" from last week. Updating my wxPython
>distribution to the newest one, restored the expected windows behavior.
>
>May be someone also has an idea on the following
>questions / problems.
>
>How can I set the background of the OpenGL Window to white
>in the 
>
>OpenGLContext\tests\indexedfaceset_lit_npf.py
>
>example?
>  
>

You could add the following to the TestingContext class:

    def Background( self, mode):
        if mode.passCount == 0:
            glClearColor( 1.0,1.0,1.0,1.0 )
            glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT )

Afraid there isn't a run-time way in the testing contexts to do it.

>When running some of the tests in the above directory, like
>
>python selectrendermode_threads.py
>
>a lot of errors of the follwoing nature are reported:
>  
>
>Traceback (most recent call last):
>  File
>"/usr/local/lib/python2.2/site-packages/OpenGLContext/visitor.py", line
>224, in visit
>    token = method( node )
>  File
>"/usr/local/lib/python2.2/site-packages/OpenGLContext/rendervisitor.py",
>line 205, in Rendering
>    return node.Render( self )
>  File
>"/usr/local/lib/python2.2/site-packages/OpenGLContext/scenegraph/shape.py", line 47, in Render
>    glDisable(GL_LIGHTING)
>GLerror: [Errno 1281] invalid value
>ERR :OpenGLContext.visitor:method <bound method
>OpaqueRenderPass.Rendering of <OpenGLContext.renderpass.OpaqueRenderPass
>object at 0x87fd394>> for node Shape( DEF='' )
>  
>
...

Sounds as though we've got some sort of compilation error in PyOpenGL. 
 AFAIK GL_LIGHTING should always be available, so calling glDisable with 
it should always work.  Could you file a bug report on it with your OS 
information, and attach the results of running OpenGL/scripts/info.py 
(which reports the versions of all the various PyOpenGL modules (and 
related stuff, such as PIL and Numeric)).

    http://sourceforge.net/tracker/?group_id=5988&atid=105988

It would be really helpful if you could identify all of the failing 
tests to see if there's any commonality there.

Enjoy yourself,
Mike