Katana Particle System

Here is a short demo of my accelerated GPU Particle System for Unity. This Particle System, when finished, should be an easy-to-use tool to handle millions of particles in real-time. Rendering and Physics are completely processed on GPU through compute shader kernels.

SCREEN SPACE RENDERING

I also made some research to be able to get fluid-like rendering. I found many techniques on the web but here is the document from Nvidia that brought me light on this subject. Based on it, I made all the rendering steps (point sprite, depth to normal, blurring, bilateral filter…). Caustics render pass isn’t done yet and I didn’t implement good physics kernels yet. Particles aren’t interacting each other but only interacting with buffered colliders from the scene.

CURRENT FEATURES

• Emitter rate and radius
• Forces and angular forces
• Size over time
• Particle Age
• Enable/Disable gravity (values from the Unity physic engine)
• Noise on velocities
• Change color over time
• Bounce and impact parameters
• Soft particles rendering
• GPU Collision Detection based on Unity colliders (bufferize scene colliders to interact with particles)
• Screen Space Rendering for Fluids (experimental)

COMING FEATURES

• Complex Mesh and Terrain Collision on GPU side
• Attract and Repel Force Areas
• All kind of Blend mode for rendering