A high-performance 2D physics engine built with Rust and wgpu, leveraging GPU compute shaders for massive parallel processing of physics simulations.
- GPU-Accelerated: All physics computations run on the GPU for maximum performance
- Spatial Grid Partitioning: Efficient broad-phase collision detection using GPU-based spatial grids. Learn more: NVIDIA GPU Gems - Broad-Phase Collision Detection
- Verlet Integration: Stable numerical integration for smooth particle motion
- Real-time Interaction: Interactive particle spawning and mouse-based attraction forces
- Scalable: Handle millions of particles with high framerates
| Input | Action |
|---|---|
W or ↑ |
Move camera up |
A or ← |
Move camera left |
S or ↓ |
Move camera down |
D or → |
Move camera right |
P |
Spawn 100 particles at mouse position |
Left Click |
Attract particles to mouse |
Mouse Wheel |
Zoom in/out |
cargo run --releasecargo test
The benchmark shows the performance for each of the compute shaders at the end of the execution. It creates benchmark.json file that can be visualized at edge://tracing/ or chrome://tracing/.
cargo run --release --features benchmark
The engine uses a sophisticated spatial partitioning system that divides the simulation space into a uniform grid. Each particle is assigned to grid cells, dramatically reducing the number of collision checks from O(n²) to approximately O(n*k) in most cases.
Learn more: NVIDIA GPU Gems - Broad-Phase Collision Detection
All collision detection and response calculations are performed in parallel on the GPU using compute shaders, allowing for real-time simulation of millions of interacting particles.
The engine employs Verlet integration for numerical stability and energy conservation, ensuring smooth and realistic particle motion over time.
Every 4 seconds, the particles are sorted using morton codes to improve cache locality.
- 2D Only: Currently supports 2D simulations
- Circle Shapes: Only circular particles are supported at this time
Test Configuration:
- GPU: AMD Radeon RX 6800 XT (with severe thermal throttling)
- OS: Windows 11
- Build: Release mode (
--release) - Gravity: disabled
The engine demonstrates excellent scaling characteristics, maintaining smooth framerates even with millions of active particles thanks to GPU parallelization.
| Particles | Frame Time |
|---|---|
| 100,000 | 1.03 ms |
| 256,000 | 1.28 ms |
| 512,000 | 1.88 ms |
| 756,000 | 2.53 ms |
| 1,000,000 | 3.66 ms |
| 2,000,000 | 8.417 ms |
| 3,000,000 | 15.62 ms |
| 4,000,000 | 22.70 ms |
- Compute shaders optimization
- Rendering optimization
- Improve physics
Built with ❤️ using Rust and wgpu