pyopengl-users

[PyOpenGL-Users] GLerror: [Errno 1281]

[Lothar B. <bi...@en...>]

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?


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='' )
>>>>

I, am using the CVS versions of PyOpenGL and OpenGLContext of today.

Any ideas?

Lothar

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