Paperfold is another flattener for triangle mesh files, heavily based on https://github.com/felixfeliz/paperfoldmodels by Felix Scholz aka felixfeliz.
Possible input files are STL, Wavefront OBJ, PLY and OFF.
To run this you need to install OpenMesh with python pip.
The algorithm of paperfoldmodels consists of three steps:
- Find a minimum spanning tree of the dual graph of the mesh.
- Unfold the dual graph.
- Remove self-intersections by adding additional cuts along edges.
Reference: The code is mostly based on the algorithm presented in a by Straub and Prautzsch (https://geom.ivd.kit.edu/downloads/proj-paper-models_cut_out_sheets.pdf).
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