pyrender: pyglet.gl.ContextException: Could not create GL context

Hi, I’m trying to run the following code:

import trimesh
import pyrender
tm = trimesh.load('/home/henry/Downloads/fuze.obj')
pymesh = pyrender.Mesh.from_trimesh(tm)

scene = pyrender.Scene()
scene.add(pymesh)
pyrender.Viewer(scene, use_raymond_lighting=True)

And I get the following error:

File "generate_pose_dataset.py", line 172, in mesh_render
    pyrender.Viewer(scene, use_raymond_lighting=True)
  File "/usr/local/lib/python2.7/dist-packages/pyrender/viewer.py", line 347, in __init__
    self._init_and_start_app()
  File "/usr/local/lib/python2.7/dist-packages/pyrender/viewer.py", line 995, in _init_and_start_app
    height=self._viewport_size[1])
  File "/usr/local/lib/python2.7/dist-packages/pyglet/window/xlib/__init__.py", line 170, in __init__
    super(XlibWindow, self).__init__(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/pyglet/window/__init__.py", line 595, in __init__
    context = config.create_context(gl.current_context)
  File "/usr/local/lib/python2.7/dist-packages/pyglet/gl/xlib.py", line 216, in create_context
    return XlibContextARB(self, share)
  File "/usr/local/lib/python2.7/dist-packages/pyglet/gl/xlib.py", line 322, in __init__
    super(XlibContext13, self).__init__(config, share)
  File "/usr/local/lib/python2.7/dist-packages/pyglet/gl/xlib.py", line 230, in __init__
    raise gl.ContextException('Could not create GL context')
pyglet.gl.ContextException: Could not create GL context

My computer shows that PyOpenGL 3.1.0, PyOpenGL_accelerate 3.1.0, and pyglet appear to be correctly installed.

To test pyglet externally from pyrender, I ran the following code:

import pyglet
pyglet.window.Window()

and a window opens as expected.

Any ideas why this error is occurring?

I’m running 16.04 with 64 bit.

Thanks! Henry C.

About this issue

Original URL
State: closed
Created 5 years ago
Reactions: 13
Comments: 33 (7 by maintainers)

Most upvoted comments

Hi I had a similar issue and fixed it by looking at which OpenGL version I had by calling:

glxinfo | grep OpenGL
>> OpenGL core profile version string: 3.3 (Core Profile) Mesa 19.1.3

Then I changed in the constants.py file in pyrender.py (you can find it wherever you installed pyrender in my case: ~/.local/lib/python3.7/site-packages/pyrender/constants.py)

OPEN_GL_MAJOR = 3
OPEN_GL_MINOR = 3

After that I was able to render 😃!

+39

oarriaga on Jul 25, 2019

I still had the problem after re-installing anaconda and creating a new environment but it was fixed by running conda install -c conda-forge libstdcxx-ng (on Ubuntu 22.04)

+27

OleBialas on Jan 24, 2023

Just for the record, I added:

os.environ['PYOPENGL_PLATFORM'] = 'egl'

to the main script and solved the issue.

+12

nicolasugrinovic on Apr 29, 2021

Hi I had a similar issue and fixed it by looking at which OpenGL version I had by calling:
glxinfo | grep OpenGL
>> OpenGL core profile version string: 3.3 (Core Profile) Mesa 19.1.3
Then I changed in the constants.py file in pyrender.py (you can find it wherever you installed pyrender in my case: ~/.local/lib/python3.7/site-packages/pyrender/constants.py)
OPEN_GL_MAJOR = 3
OPEN_GL_MINOR = 3
After that I was able to render 😃!

I was facing a very similar issue and this was the solution that finally fixed it for me! One small update: in my pyrender/constants.py file, I had to make the changes

TARGET_OPEN_GL_MAJOR = 3
TARGET_OPEN_GL_MINOR = 3

UttaranB127 on Oct 27, 2021