# Mesh2SDF

[![downloads](https://pepy.tech/badge/mesh2sdf)](https://pepy.tech/project/mesh2sdf)
[![PyPI](https://img.shields.io/pypi/v/mesh2sdf)](https://pypi.org/project/mesh2sdf/)


Converts an input mesh to a signed distance field. It can work with arbitrary
meshes, even **non-watertight** meshes from ShapeNet.

Mesh2SDF is used in our paper 
[Dual Octree Graph Networks (SIGGRAPH 2022)](https://wang-ps.github.io/dualocnn)
to generate the training data.

## Installation

- Install via the following command:
    ``` shell
    pip install mesh2sdf
    ```

- Alternatively, install from source via the following commands.
    ``` shell
    git clone https://github.com/wang-ps/mesh2sdf.git
    pip install ./mesh2sdf
    ```

## Example

After installing `mesh2sdf`, run the following command to process an input mesh
from ShapeNet:

```shell
python example/test.py
```

![Example of a mesh from ShapeNet](https://raw.githubusercontent.com/wang-ps/mesh2sdf/master/example/data/result.png)


## How does it work?

- Given an input mesh, we first compute the **unsigned** distance field with the
  fast sweeping algorithm implemented by
  [Christopher Batty (SDFGen)](https://github.com/christopherbatty/SDFGen).
  Note that the unsigned distance field can always be reliably and accurately
  computed even though the input mesh is non-watertight.

- Then we extract the level sets with a small value **d** with the marching cube
  algorithm. The extracted level sets are represented with triangle meshes and
  are guaranteed to be manifold.

- There exist multiple connected components in the extracted meshes, and we only
  keep the mesh with the largest bounding box.

- Compute the signed distance field again with the kept triangle mesh as the
  final output. In this way, the signed distance field (SDF) is computed for a
  non-watertight input mesh.


Compute the signed distance field from an input mesh. 

Socket Acquires Coana to Bring Reachability Analysis to Every Appsec Team

mesh2sdf

Compute the signed distance field from an input mesh

wang-ps

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mesh2sdf

Mesh2SDF

Installation

Example

How does it work?

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