Unity VFX Graph Gaussian Splatting Renderer

A Unity implementation of Gaussian splatting using VFX Graph for real-time rendering. This project uses Unity's VFX Graph system as an alternative to the EWA algorithm to provide more flexibility in accessing the splat's data structures.

Installation

Import this project into Unity or copy the Assets/vfx-graph-gs/ folder to your project

Usage

Importing PLY Files

1. Place your PLY file containing Gaussian splat data in your project
2. The custom SplatImporter will automatically process the file
3. A VFX prefab will be generated that you can drag on to a scene

File Structure

Assets/vfx-graph-gs/
├── Scripts/                    # Core C# implementation
│   ├── SplatData.cs           # Data container and GPU buffer management
│   ├── SplatDataBinder.cs     # VFX Graph integration
│   ├── SplatDataInspector.cs  # Custom inspector for SplatData
│   └── SplatImporter.cs       # PLY file importer with burst compilation
├── VFXGraphHLSL/              # GPU shader functions
│   ├── CalculateAxes.hlsl     # Quaternion to matrix conversion
│   ├── CalculateSH.hlsl       # Spherical harmonics calculations
│   └── GetMajorAxes.hlsl      # Projection axis selection
├── SplatVFX.vfx              # Main VFX Graph asset
└── [PLY files]               # Gaussian splat data files

License

This project is licensed under the MIT License. See the LICENSE file for details.

References

• Original Gaussian Splatting Code
• SplatVFX

Additional Notes

• The importer processes files in 256MB chunks to handle large files
• Presently, the splat file must have all splat data present, including spherical harmonics. It currently only supports float type variables and binary-encoded files.