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crash using engine='scad' with boolean operations

See original GitHub issue

I’ve installed OpenSCAD, yet I get the following crash when i switch to engine='scad':

Traceback (most recent call last):
  File "src/app/find_border.py", line 97, in <module>
    diff = new_mesh.difference(inner, engine='scad')
  File "/opt/miniconda3/envs/hfh/lib/python3.7/site-packages/trimesh/base.py", line 2616, in difference
    engine=engine, **kwargs)
  File "/opt/miniconda3/envs/hfh/lib/python3.7/site-packages/trimesh/boolean.py", line 25, in difference
    result = _engines[engine](meshes, operation='difference', **kwargs)
  File "/opt/miniconda3/envs/hfh/lib/python3.7/site-packages/trimesh/interfaces/scad.py", line 65, in boolean
    return interface_scad(meshes, script, debug=debug, **kwargs)
  File "/opt/miniconda3/envs/hfh/lib/python3.7/site-packages/trimesh/interfaces/scad.py", line 53, in interface_scad
    result = scad.run(_scad_executable + ' $SCRIPT -o $MESH_POST')
  File "/opt/miniconda3/envs/hfh/lib/python3.7/site-packages/trimesh/interfaces/generic.py", line 90, in run
    startupinfo=startupinfo)
  File "/opt/miniconda3/envs/hfh/lib/python3.7/subprocess.py", line 363, in check_call
    raise CalledProcessError(retcode, cmd)
subprocess.CalledProcessError: Command '['/Applications/OpenSCAD.app/Contents/MacOS/openscad', '/var/folders/k3/hfd_v6x52mqcvp2cxpllyh0c0000gn/T/tmpkpnv5evr', '-o', '/var/folders/k3/hfd_v6x52mqcvp2cxpllyh0c0000gn/T/tmpb87_spjh.off']' returned non-zero exit status 1.

BTW, the same code works fine when using engine='blender'.

Any ideas?

Issue Analytics

State:
Created 3 years ago
Comments:7 (2 by maintainers)

Top GitHub Comments

1reaction

dlednikcommented, Dec 20, 2020

@Aniwax I saw same performance issues in my co2tools library. But I found out if I use multithreading to join the items together and then do difference on just 2 objects it is much faster than sending a list of meshes to cut out.

you can have a look at a sample loop code here: https://github.com/Mambix/co2tools/blob/master/co2tools/stl/builder.py#L145 and this is where the union is called in a thread: https://github.com/Mambix/co2tools/blob/master/co2tools/stl/builder.py#L157

0reactions

dlednikcommented, Dec 20, 2020

FYI: I also get a crash using scad engine on Ubuntu 18.04LTS

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