Re: glGenVertexArrays producing 'invalid enumerant' error.

And I attached the wrong log, here's the correct one.

On Thu, Oct 20, 2011 at 9:39 PM, Gordon Wrigley <[email protected]> wrote:

> On Tue, Oct 18, 2011 at 4:56 AM, Mike C. Fletcher <[email protected]>wrote:
>
>> On 11-10-12 03:34 AM, tolomea wrote:
>> > Version stuff:
>> > Python 2.7.1+ (r271:86832, Apr 11 2011, 18:05:24)
>> > [GCC 4.5.2] on linux2
>> > Type "help", "copyright", "credits" or "license" for more information.
>> > import OpenGL
>> > OpenGL.__version__
>> > '3.0.2a1'
>> > I'm using FORWARD_COMPATIBLE_ONLY, context version 3.3 and
>> GLUT_CORE_PROFILE.
>> >
>> >
>> > I'm porting a working (same machine and environment etc) C program to
>> Python,
>> > and the glGenVertexArrays function is giving me grief.
>> >
>> > The pythonic form:
>> >     vao = glGenVertexArrays(1)
>> > produces "TypeError: this function takes at least 2 arguments" which I
>> presume
>> > means it hasn't been wrapped yet.
>> Yes.
>> > I've no idea what could be causing that and googling hasn't turned up
>> anything
>> > useful.
>> >
>> > Does anyone have any suggestions as to where to look?
>> > Are there any known working examples of using vertex array objects and
>> pyopengl
>> > that I could cross check against?
>> My go-to guess with almost any Python-differs-from-C problems during
>> init is to look at the error-checking code.  PyOpenGL's biggest
>> difference from C code is that it runs error checking after every call.
>> I'm guessing either your context isn't quite ready-to-go and you're
>> getting an error from the error checking, or that the line before had an
>> error and the error checking picked it up a line late.
>>
>> import OpenGL
>> OpenGL.USE_ACCELERATE = False
>> OpenGL.ERROR_CHECKING = False
>>
>> at the top of your script should let you quickly determine a) where the
>> problem is b) whether the problem is with error checking.
>>
>>
> If I turn error checking off it dies much earlier on a glCreateShader call
> with:
>
> WARNING:OpenGL.errors:Failure on glCreateShader: Traceback (most recent
> call last):
>   File "/usr/local/lib/python2.7/dist-packages/OpenGL/logs.py", line 74, in
> __call__
>     return function( *args, **named )
> ArgumentError: argument 3: <type 'exceptions.TypeError'>: Don't know how to
> convert parameter 3
>
> Traceback (most recent call last):
>   File "main.py", line 237, in <module>
>     main(sys.argv)
>   File "main.py", line 227, in main
>     init()
>   File "main.py", line 147, in init
>     init_program()
>   File "main.py", line 122, in init_program
>     vert = gl.VertexShader("data/shaders/basic.vert")
>   File "/mnt/drive1/home/gordon/code/spacecraft2/gl.py", line 50, in
> __init__
>     _Shader.__init__(self, fname, VERTEX_SHADER)
>   File "/mnt/drive1/home/gordon/code/spacecraft2/gl.py", line 37, in
> __init__
>     self.shader = createShader(shader_type)
>   File
> "/usr/local/lib/python2.7/dist-packages/OpenGL/platform/baseplatform.py",
> line 372, in __call__
>     return self( *args, **named )
>   File "/usr/local/lib/python2.7/dist-packages/OpenGL/logs.py", line 74, in
> __call__
>     return function( *args, **named )
> ctypes.ArgumentError: argument 3: <type 'exceptions.TypeError'>: Don't know
> how to convert parameter 3
>
>
> That doesn't seem like progress.
>
> With error checking on calling glGetError right before the
> glGenVertexArrays call returns 0.
>
> Toggling use accelerate hasn't made any noticeable difference.
>
> I don't know if it helps any but I turned on full logging and attached a
> dump of the output.
>
> G
>
>
>

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