module 'pyglet.gl' has no attribute 'xlib'

[hearables-pkinsella]

Can you post the python version and version for the dependencies you use?

I am getting a pyglet xlib error running on Mac in python 3.6/3.7

[YuDeng]

Hi, I've met the same problem as yours. I follow the instruction in #8, and the problem is fixed. Hope it can help you, too.

[hearables-pkinsella]

Thank you. That seems to have solved the xlib error. But I am now running into an OpenGL error:

ValueError: Failed to initialize Pyglet window with an OpenGL >= 3+ context. If you're logged in via SSH, ensure that you're running your script with vglrun (i.e. VirtualGL). The internal error message was "'NoneType' object has no attribute 'setView_'"

Is this something you have seen?

[YuDeng]

Hi, if you are using a remote computer via SSH or some tools rely on Xserver, the OpenGL in the remote computer may not be able to run correctly. I fixed the issue by using a local pc. An alternative solution is to use some remote tools that support OpenGL such as VirtualGL mentioned in the error message.

[marian42]

@hearables-pkinsella Can you try to add this in your main python script before you import mesh_to_sdf:

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

Please let me know if this fixes the problem. Are you working on a computer without a screen (via ssh)? Does your computer have a GPU?

[AlexsaseXie]

@hearables-pkinsella Can you try to add this in your main python script before you import mesh_to_sdf:

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

Please let me know if this fixes the problem. Are you working on a computer without a screen (via ssh)? Does your computer have a GPU?

I was using ssh with X-11 forwarding and DISPLAY. I tried to run example/voxelize_chair.py got the same error with @hearables-pkinsella .
I modified example/voxelize_chair.py as you said. But I got anothor error.

(mesh_to_sdf) xieyunwei@ubuntu:~/workdir/occupancy_networks/external/mesh_to_sdf$ python example/voxelize_chair.py
Scanning...
Traceback (most recent call last):
File "example/voxelize_chair.py", line 12, in
cloud = get_surface_point_cloud(mesh, surface_point_method='scan', scan_count=20, scan_resolution=400)
File "/home/xieyunwei/.conda/envs/mesh_to_sdf/lib/python3.6/site-packages/mesh_to_sdf/init.py", line 17, in get_surface_point_cloud
return surface_point_cloud.create_from_scans(mesh, bounding_radius=bounding_radius, scan_count=scan_count, scan_resolution=scan_resolution, calculate_normals=calculate_normals)
File "/home/xieyunwei/.conda/envs/mesh_to_sdf/lib/python3.6/site-packages/mesh_to_sdf/surface_point_cloud.py", line 131, in create_from_scans
z_far=bounding_radius * 3
File "/home/xieyunwei/.conda/envs/mesh_to_sdf/lib/python3.6/site-packages/mesh_to_sdf/scan.py", line 52, in init
color, depth = render_normal_and_depth_buffers(mesh, camera, self.camera_transform, resolution)
File "/home/xieyunwei/.conda/envs/mesh_to_sdf/lib/python3.6/site-packages/mesh_to_sdf/pyrender_wrapper.py", line 58, in render_normal_and_depth_buffers
renderer = pyrender.OffscreenRenderer(resolution, resolution)
File "/home/xieyunwei/.conda/envs/mesh_to_sdf/lib/python3.6/site-packages/pyrender/offscreen.py", line 31, in init
self._create()
File "/home/xieyunwei/.conda/envs/mesh_to_sdf/lib/python3.6/site-packages/pyrender/offscreen.py", line 149, in _create
self._platform.init_context()
File "/home/xieyunwei/.conda/envs/mesh_to_sdf/lib/python3.6/site-packages/pyrender/platforms/egl.py", line 188, in init_context
EGL_NO_CONTEXT, context_attributes
File "/home/xieyunwei/.conda/envs/mesh_to_sdf/lib/python3.6/site-packages/OpenGL/platform/baseplatform.py", line 402, in call
return self( *args, **named )
File "/home/xieyunwei/.conda/envs/mesh_to_sdf/lib/python3.6/site-packages/OpenGL/error.py", line 232, in glCheckError
baseOperation = baseOperation,
OpenGL.error.GLError: GLError(
err = 12297,
baseOperation = eglCreateContext,
cArguments = (
<OpenGL._opaque.EGLDisplay_pointer object at 0x7f75a1564ea0>,
<OpenGL._opaque.EGLConfig_pointer object at 0x7f75a1564e18>,
<OpenGL._opaque.EGLContext_pointer object at 0x7f75a1504bf8>,
<OpenGL.arrays.lists.c_int_Array_7 object at 0x7f75a7fdb7b8>,
),
result = <OpenGL._opaque.EGLContext_pointer object at 0x7f75a152de18>
)

It seems like that I cannot use(initialize) EGL on my server... Are there any additional steps needed to be done?
btw I'm totally new to EGL.

[AlexsaseXie]

Hummmmmmm.
It seems that this is an environment problem that cannot be solved easily.

When you install pyrender by pip3 install pyrender. The PyOpenGL required by pyrender should be version 3.1.0. I read the code in pyrender /platforms/egl.py and found the following comments.
class EGLPlatform(Platform): """Renders using EGL (not currently working on Ubuntu). """

Here is the hint by pyrender's doc to solve the problem.
I'll try OSMesa instead...