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petercorke / robotics-toolbox-python

Robotics Toolbox for Python
MIT License
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How to install vpython as backend? #444

Open NirViaje opened 1 month ago

NirViaje commented 1 month ago

Check here first

Common issues

Describe the bug

Traceback (most recent call last): File "rtb_neo.py", line 51, in robot.plot(qt.q, backend=args.backend) File "/home/nirj/miniconda3/lib/python3.8/site-packages/roboticstoolbox/robot/BaseRobot.py", line 2331, in plot env = self._get_graphical_backend(backend) File "/home/nirj/miniconda3/lib/python3.8/site-packages/roboticstoolbox/robot/BaseRobot.py", line 2230, in _get_graphical_backend raise ValueError("unknown backend", backend) # pragma nocover ValueError: ('unknown backend', 'vpython')

Version information

rtb 1.1.0 python 3.8.10 pip installed vpython 7.6.5

Did you install from PyPI or GitHub? If PyPI what version number? If GitHub what commit hash?

Robotics Toolbox depends heavily on two other packages: Swift (3D graphics) and SpatialMath toolbox (underpinning maths utilities). If you think your issue is related to these, then please answer the questions above for them.

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a-camarillo commented 1 month ago

It looks like vpython is not a supported backend.

https://github.com/petercorke/robotics-toolbox-python/blob/7f1bcae7e17360ea9b30a49731c2c93a219c6a19/roboticstoolbox/robot/BaseRobot.py#L2175-L2178

If vpython is globally installed through pip my suggestion is to try installing rtb in a virtual environment and see if that separation from your global dependencies fixes the issue