[PyOpenGL-Users] Fwd: glGenVertexArrays producing 'invalid enumerant' error.

[Gordon W. <go...@to...>]

+list

---------- Forwarded message ----------
From: Gordon Wrigley <go...@to...>
Date: Tue, Nov 8, 2011 at 10:45 PM
Subject: Re: [PyOpenGL-Users] glGenVertexArrays producing 'invalid
enumerant' error.
To: "Mike C. Fletcher" <vrp...@gm...>


I stripped my program right down to the bare minimum and condensed it into
a single file, just 150 lines and 5 separate issues.
The file as attached doesn't run for me.
There are 5 if statements marked with XXX comments as you toggle each one
another problem is resolved / worked around.
After all 5 are toggled it runs and displays a single white triangle.

In order those problems are:
1: enabling ERROR_CHECKING after importing OpenGL.GL causes glShaderSource
to error with "Don't know how to convert parameter 3"
2: glGenVertexArrays is not wrapped
3: calling glGenVertexArrays through pyopengl causes a 1280 invalid
enumerant
4: which moves to the following glBindVertexArray call when you
call glGenVertexArrays through ctypes
5: glVertexAttribPointer will only accept a pointer for the last argument
not the integer value you pass when using it with GL_ARRAY_BUFFER bound.

I hope this aids in tracking down and resolving some of these problems.
And I am by no means a GL expert so it wouldn't surprise me at all if one
or more of these were my fault.

G