OpenGL.error.NullFunctionError

[hyungju-song]

I use zed2, python 3.7.7 , win10
I was able to run almost example code, except code using opengl.
(ex. i can run: camera_control
i can't run: body_tracking, positional_tracking)
After several trials and errors, I realized that all the code related to ogl_viewer showed the same error.

After seeing the advice that the lib called freeglut.dll may not exist, I installed freeglut 3.0 newly, but I confirmed that there is freeglut2.8 which is automatically installed in zed-sdk. Also, there was freeglut2.6 inside while laying cuda10.0.
I installed the sdk for cuda10.0-win10, but it is a bit strange that the versions of freeglut are different. Isn't this the original problem?

Is there no error like me?

The error is as follows:
OpenGL.error.NullFunctionError: Attempt to call an undefined function glutInit, check for bool(glutInit) before calling

HELP ME OUT , PLZ
Thanks in advance.

my Software/Hardware specs:
win10
geforce mx150
python 3.7.7 (tags/v3.7.7:d7c567b08f, Mar 10 2020, 10:41:24) [MSC v.1900 64 bit (AMD64)] on win32
CUDA 10.0
pycharm community 2020

[P-yver]

Hi,
Indeed, on windows you may encouter this issue related to opengl.
You may update your version, you can find the latest ones here
In your case (Python 3.7) you will need to download and install:

• PyOpenGL‑3.1.5‑cp37‑cp37m‑win_amd64.whl
• PyOpenGL_accelerate‑3.1.5‑cp37‑cp37m‑win_amd64.whl

to install them

python3 -m pip install PyOpenGL_XXXX.whl

[hyungju-song]

Thank you.
Surprisingly, it was resolved immediately.
I can now run all my code 💯

[Kazlovich]

Hello! I am running into a very similar issue. When I run the body_tracking tutorial, I keep getting the ModuleNotFoundError: No module named 'ogl_viewer'

I have downloaded the PyOpenGl extensions as suggested and still get the error.

I have ZED2, Windows 10, Python 3.7.8 64-bit version.
Please help!

[qt-truong]

Hi,

This error usually means that the script you ran cannot find the folder ogl_viewer in which OpenGL related code is under.
If you copied the sample positional_tracking.py locally on your computer, make sure to also copy everything that is under positional tracking/python/
The folder in which you run the sample should look like :

<your_folder_name>
├── ogl_viewer/
└── positional_tracking.py

[KastanDay]

@qt-truong had the correct solution for me. You can find those files here (but I recommend just cloning the ENTIRE repo, much easier): https://github.com/stereolabs/zed-examples/tree/master/object%20detection/image%20viewer

[github-actions]

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