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pythonwinapiopenglglut

"CreateDC failed, Screen size info may be incorrect"

I am trying to use OpenGL with python. I have Pyton 3.7.4, on a Windows 10 machine.

I downloaded PyOpenGL and PyOpenGL_accelerate from .whl files, and I have downloaded the freeglut.dll file separately and placed it in the same directory as the script I am running.

My initial scripts is just:

import OpenGL
from OpenGL.GL import *
from OpenGL.GLUT import *
from OpenGL.GLU import *

glutInit()

which gives the following error message:

freeglut (foo): fgPlatformInitialize: CreateDC failed, Screen size info may be i ncorrect This is quite likely caused by a bad '-display' parameter

(Without the freeglut.dll file, it gives a NameError complaint about glutInit() being undefined).

I have seen error on this question but a) they were doing it with C/C++ and b) the answer did not say where one had to make the change.

Any ideas on what I am supposed to do?

UPDATE

The problem may be this:

import os
os.getenv('DISPLAY')
# 'needs-to-be-defined'

What should I call this environment variable?

Solution

  • I just added this piece of code at the beginning of my script and it worked:

    import os
try:
    del os.environ['DISPLAY']
except:
    pass

    Ideally I would delete the DISPLAY environment variable for all processes but I did not manage.