https://github.com/felixfeliz/paperfoldmodels

A Python script for unfolding triangular meshes in order to create papercraft models
https://github.com/felixfeliz/paperfoldmodels

Last synced: 13 days ago
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A Python script for unfolding triangular meshes in order to create papercraft models

• Host: GitHub
• URL: https://github.com/felixfeliz/paperfoldmodels
• Owner: felixfeliz
• License: mit
• Created: 2018-11-27T10:19:53.000Z (almost 6 years ago)
• Default Branch: master
• Last Pushed: 2022-12-14T10:35:23.000Z (almost 2 years ago)
• Last Synced: 2024-08-01T22:52:22.983Z (3 months ago)
• Language: Python
• Homepage:
• Size: 183 KB
• Stars: 32
• Watchers: 2
• Forks: 10
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# paperfoldmodels

A python module that unfolds triangular surfaces onto the plane. The result can be used to create papercraft models. 

The python bindings of [OpenMesh](http://www.openmesh.org) are used and thus the original mesh can be loaded from any format supported by it.

The output consists of several SVG files, each containing an intersection-free component of the unfolding.

## Dependencies

* Python 3

* NumPy

* OpenMesh

* NetworkX

## Example

The usage is shown in testUnfold.py

Unfolding of the stanford bunny:

![bunny](bunnyReduced.svg)

The colors indicate the folding direction and the numbers the corresponding glued edge.

## Method

The algorithm consists of three steps:

1. Find a minimum spanning tree of the dual graph of the mesh.

2. Unfold the dual graph.

3. Remove self-intersections by adding additional cuts along edges. 

## Reference

The code is mostly based on the algorithm presented in this [report](https://geom.ivd.kit.edu/downloads/proj-paper-models_cut_out_sheets.pdf) by Straub and Prautzsch.

## Language

Because the original target audience was a group of German-speaking high-school students, many of the comments are written in German.

## Author

**Felix Scholz**