integrate PyMeshLab for meshing_repair_non_manifold_vertices

[JansenSmith]

ms.meshing_repair_non_manifold_vertices(vertdispratio = 0.010000) running this twice fixes most STLs with duplicated vertices

Here is a clean pr adding SceneBuilder as an example of all the bits that need to be touched: https://github.com/CommonWealthRobotics/BowlerStudio/issues/409

Process is documented here: https://github.com/CommonWealthRobotics/BowlerStudio/pull/412

MeshLab is a utility, so it would just require an additional json in ExternalEditorsBowlerStudio and a static class call in: https://github.com/CommonWealthRobotics/bowler-script-kernel/blob/kh/add-cadoodle/src/main/java/com/neuronrobotics/bowlerstudio/util/GeometrySimplification.java

[JansenSmith]

actually..... i've found some that require multiple runs of meshing_repair_non_manifold_vertices.... instead, use PyMeshLab to find non-manifold vertices and iterate until number is zero.

[JansenSmith]

actually..... i've found some that require multiple runs of meshing_repair_non_manifold_vertices.... still researching

[madhephaestus]

You may want to look at the source of the exception you are trying to correct and see if maybe you can avoid the problem upstream of the repair: https://github.com/NeuronRobotics/JCSG/blob/development/src/main/java/eu/mihosoft/vrl/v3d/Plane.java#L106

[madhephaestus]

I need a small file <1mb that produces the problem for unit testing

[madhephaestus]

the root cause may have been fixed in this commit: https://github.com/NeuronRobotics/JCSG/commit/5974f4a3f041e91cd2872f5474e0fdba1337a0f3