# GPU Particles 3D Demo

compute-shader-driven particle simulation.

```{raw} html
<a class="example-run-button" href="../demos/features_3d_gpu_particles.html">▶ Run in browser</a>

```

**Tags:** `3d`

Showcases ``GPUParticles3D``: position, velocity, colour and lifetime live
entirely on the GPU; the compute shader (``particle_sim.comp``) runs once
per frame and the same billboard pipeline that draws CPU particles renders
the result. No per-frame CPU-to-GPU upload of particle state.

For CPU emitters (sub-emitters, collision, trails) see ``particles.py``.

Run:
    uv run python examples/features/3d/gpu_particles.py

Controls:
    1       - Toggle fountain (steady stream, gravity, colour gradient)
    2       - Toggle vortex (spherical emission, low gravity)
    R       - Restart all emitters
    A / D   - Orbit camera
    W / S   - Zoom in / out
    ESC     - Quit

## Source

```{literalinclude} ../../examples/features/3d/gpu_particles.py
:language: python
:linenos:
```