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   Guy Dupont (gvy_dvpont@mastodon.social)'s status on Sunday, 05-Jan-2025 06:57:26 JST Guy Dupont

   Wrote a script to generate these "Iso Slice-O" drawings directly from 3D model files (with a tiiiny bit of manual SVG cleanup at the end). Ran it on some of the most popular models and I'm obsessed with the results using white ink / black paper

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     Rich Felker (dalias@hachyderm.io)'s status on Sunday, 05-Jan-2025 22:12:52 JST Rich Felker

     in reply to

     @gvy_dvpont These first three steps could be done entirely as an OpenSCAD module applied to the STL.

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     Guy Dupont (gvy_dvpont@mastodon.social)'s status on Sunday, 05-Jan-2025 22:12:53 JST Guy Dupont

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     Then I iterate through each layer and use OpenSCAD to extrude by a given amount and recreate an STL file for each.

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     Guy Dupont (gvy_dvpont@mastodon.social)'s status on Sunday, 05-Jan-2025 22:12:53 JST Guy Dupont

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     I then use the PyVista library to place the STL file in space and take a picture of each with virtual lighting on. I always take the snapshots from a fixed global isometric position. I use the calculated camera from the largest slice, which ensures all will be in view.

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     Guy Dupont (gvy_dvpont@mastodon.social)'s status on Sunday, 05-Jan-2025 22:12:54 JST Guy Dupont

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     First step takes in a number of slices and runs through the STL file vertically to get cross sections, and produces an SVG for each. Here's the output:

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     Rich Felker (dalias@hachyderm.io)'s status on Sunday, 05-Jan-2025 23:22:06 JST Rich Felker

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     @gvy_dvpont Yeah CGAL is really buggy. Building with experimental features (manifold) fixes lots of stuff. It's so disappointing they don't have a stable tag so everyone ships ultra slow buggy builds with the old CGAL...

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     Guy Dupont (gvy_dvpont@mastodon.social)'s status on Sunday, 05-Jan-2025 23:22:07 JST Guy Dupont

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     • Rich Felker

     @dalias I tried that first! projection(cut=true) was broken in my build I didn't feel like figuring out what I needed to install when I could just throw Python at it

     https://github.com/openscad/openscad/issues/5159