sdf-generator

A Unity tool to generate signed distance field volumes (as Texture3D assets) from meshes.

How To Install

The sdf-generator package uses the scoped registry feature to import dependent packages. Please add the following sections to the package manifest file (Packages/manifest.json).

To the scopedRegistries section:

{
  "name": "DSS",
  "url": "https://registry.npmjs.com",
  "scopes": [ "com.dss" ]
}

To the dependencies section:

"com.dss.sdf-generator": "1.0.2"

After changes, the manifest file should look like below:

{
  "scopedRegistries": [
    {
      "name": "DSS",
      "url": "https://registry.npmjs.com",
      "scopes": [ "com.dss" ]
    }
  ],
  "dependencies": {
    "com.dss.sdf-generator": "1.0.2",
    ...

To Use

In Editor

1. Select SDF > Generator from the Unity menu bar, the tool window will pop up.
2. Set the relevant options (described in the next section).
3. Press Create and a save dialog will pop up.
4. Choose a location and name to save your SDF to.

Through a Script

// create a new generator instance
DSS.SDF.Generator generator = new DSS.SDF.Generator();

// set the relevant options (described in the next section)
generator.Mesh = someMeshInstance;
generator.Resolution = 32;
// ...etc...

// generate the Texture3D
// note: this can take a long time, so definitely don't do it each frame
// and probably only do it once when the application first starts
Texture3D sdf = generator.Generate();

Options

Mesh: the mesh you want to generate an SDF from.

Resolution: the resulting Texture3D resolution (I recommend that you keep this below 64).

Submesh Index: for multi-part meshes, the index of the sub-mesh you want to use.

Padding: the padding to surround your mesh within the SDF (only set this to be non-zero if you see artifacts).