Hello,

I am using Trimesh to work on STL files, generating slices at different Z heights et then generating a surfacing toolpath for CNC Milling. contour_parallel.py looks perfect for my purpose, however it doesnt work :
When i use the function to generate a toolpath on polygon or multipolygon it gives the error "'MultiPolygon' object has no attribute 'exterior'"
I am thinking maybe it is a problem due to new shapely versions?

Thanks!