Renderer.r contains only 0

[iegorval]

Good afternoon,

I have been struggling for some time to make OpenDR work in some other project I have found on github (https://github.com/silviazuffi/smalr_online). So, apparently, even though the renderer parameters, vertices, faces etc seem to make sense, the r it returns contains only zeros. The rendered image is then empty.

Some other script (https://smpl.is.tue.mpg.de/downloads -> Download version 1.1.0 for Python 2.7 (male, female, neutral all with 300 shape PCs) -> smpl -> smpl_webuser -> hello_world -> render_smpl.py (cannot share the code) seems to actually render the image properly, though the input and the renderer setup are very similar.

Is anyone familiar with a similar issue? I use Ubuntu 18.04, Python 3.8, latest version of opend from PyPi.

[iegorval]

UPD: This is probably one of the weirdest error I have encountered (that is why I apologize for the original description, that was not really detailed - I was really clueless about the possible source).

After (quite) some time, I have discovered that the OpenGL imports breaks the renderer. Or, at least they do for me. I have managed to make a (hopefully) reproducible example, based on the OpenDR demo:

import chumpy as ch
from OpenGL.GL import glPixelStorei, glMatrixMode, glHint, glTexParameterf, glDisableClientState

from opendr.renderer import ColoredRenderer
from opendr.lighting import LambertianPointLight

rn = ColoredRenderer()

from opendr.util_tests import get_earthmesh
m = get_earthmesh(trans=ch.array([0,0,4]), rotation=ch.zeros(3))
w, h = (320, 240)

from opendr.camera import ProjectPoints
rn.camera = ProjectPoints(v=m.v, rt=ch.zeros(3), t=ch.zeros(3), f=ch.array([w,w])/2., c=ch.array([w,h])/2., k=ch.zeros(5))
rn.frustum = {'near': 1., 'far': 10., 'width': w, 'height': h}
rn.set(v=m.v, f=m.f, bgcolor=ch.zeros(3))

rn.vc = LambertianPointLight(
f=m.f,
v=rn.v,
num_verts=len(m.v),
light_pos=ch.array([-1000,-1000,-1000]),
vc=m.vc,
light_color=ch.array([1., 1., 1.]))

import cv2
cv2.imshow('example', rn.r)
cv2.waitKey(0)
cv2.destroyAllWindows()

The from OpenGL.GL import glPixelStorei, glMatrixMode, glHint, glTexParameterf, glDisableClientState line makes the renderer output equal to 0. If I comment this line OR move this line after the opendr imports, the renderer suddenly works. Now, I am not sure if this is the problem of OpenGL, or the opendr, but there seem to be some conflict, which I am not sure how to address.

I get this issue on the Ubuntu 18.04, PyOpenGL 3.1.4 and 3.1.5 (tried both), opendr 0.78.