unity-voxel

Voxelize mesh algorithm in Unity. (includes GPU and CPU voxelizers.)

GPUVoxelParticleSystem

the Demo for GPU Particle with geometry shader. (only tested on windows10 (GTX 1060))

Inspired by Keijiro Takahashi works⚡️ StandardGeometryShader & KvantSpray

GPUVoxelMosaic

the Demo to update the resolution of voxels in realtime. (only tested on windows10 (GTX 1060))

GPUVoxelSkinnedMesh

Sample a mesh from SkinnedRenderer in every frame and voxelize it in realtime.

the human model and animation from asset store.

Usage

with GPU Voxelizer (recommended)

GPUVoxelData data = GPUVoxelizer.Voxelize(
    voxelizer,  // ComputeShader (Voxelizer.compute)
    mesh,       // a target mesh
    64,         // # of voxels for largest AABB bounds
    true        // flag to fill in volume or not; if set flag to false, sample a surface only
);

// build voxel cubes integrated mesh
GetComponent<MeshFilter>().sharedMesh = VoxelMesh.Build(data.GetData(), data.UnitLength, useUV);

// build 3D texture represent a volume by voxels.
RenderTexture volumeTexture = GPUVoxelizer.BuildTexture3D(
  voxelizer,
  data,
  texture,    // Texture2D to color voxels based on uv coordinates in voxels
  RenderTextureFormat.ARGBFloat,
  FilterMode.Bilinear
);

// need to release a voxel buffer
data.Dispose();

with CPU Voxelizer

// Voxelize target mesh with CPU Voxelizer

List<Voxel> voxels = CPUVoxelizer.Voxelize(
    mesh,   // a target mesh
    20      // # of voxels for largest AABB bounds
);

Compatibility

Tested on Unity 2018.3.0f2, windows10 (GTX 1060), macOS (metal, not compatible with GPU Particle Demo).

Sources

Triangle mesh voxelization / Wolfire Games Blog - http://blog.wolfire.com/2009/11/Triangle-mesh-voxelization
Möller–Trumbore intersection algorithm - https://en.wikipedia.org/wiki/M%C3%B6ller%E2%80%93Trumbore_intersection_algorithm
keijiro/StandardGeometryShader - https://github.com/keijiro/StandardGeometryShader
keijiro/KvantSpray - https://github.com/keijiro/KvantSpray
Post Processing Stack - https://www.assetstore.unity3d.com/jp/#!/content/83912

mattatz / unity-voxel