Error description

When running vibe, the CentOS server without display is used. When using pyrender for off screen rendering, errors are reported OpenGL.error.GLError: GLError(err = 12296), as follows:

Traceback (most recent call last):
  File "demo.py", line 416, in <module>
    main(args)
  File "demo.py", line 278, in main
    renderer = Renderer(resolution=(orig_width, orig_height), orig_img=True, wireframe=args.wireframe)
  File "***/VIBE/lib/utils/renderer.py", line 60, in __init__
    point_size=1.0
  File "***/anaconda3/envs/vibe-env/lib/python3.7/site-packages/pyrender/offscreen.py", line 31, in __init__
    self._create()
  File "***/anaconda3/envs/vibe-env/lib/python3.7/site-packages/pyrender/offscreen.py", line 134, in _create
    self._platform.init_context()
  File "***/anaconda3/envs/vibe-env/lib/python3.7/site-packages/pyrender/platforms/egl.py", line 177, in init_context
    assert eglInitialize(self._egl_display, major, minor)
  File "***/anaconda3/envs/vibe-env/lib/python3.7/site-packages/OpenGL/platform/baseplatform.py", line 409, in __call__
    return self( *args, **named )
  File "***/anaconda3/envs/vibe-env/lib/python3.7/site-packages/OpenGL/error.py", line 232, in glCheckError
    baseOperation = baseOperation,
OpenGL.error.GLError: GLError(
        err = 12296,
        baseOperation = eglInitialize,
        cArguments = (
                <OpenGL._opaque.EGLDisplay_pointer object at 0x7f883a03a170>,
                c_long(0),
                c_long(0),
        ),
        result = 0
)

Solution

Ubuntu: https://pyrender.readthedocs.io/en/latest/install/index.html#installmesa Use OSMesa to offscreen render.

It is more convenient to use · CONDA · to install osmesa as follows:

conda install osmesa

Note: after installing osmesa, reinstall pyopengl, otherwise an error will still be reported, as follows:

pip uninstall pyopengl
git clone https://github.com/mmatl/pyopengl.git
pip install ./pyopengl

Specify PYOPENGL_PLATFORM before running the scriptis osmesa , as follows:

# demp.py
import os
# os.environ['PYOPENGL_PLATFORM'] = 'egl'
os.environ['PYOPENGL_PLATFORM'] = 'osmesa'

Note: os.environ[‘PYOPENGL_PLATFORM’] = ‘osmesa’ should ideally follow import os to ensure that PYOPENGL_PLATFORM is changed to osmesa before using render, or you can explicitly specify os.environ before using render specifically [‘PYOPENGL_PLATFORM’] = ‘osmesa’.