noisy_bevy

Simple stupid noise primitives for glam (Vec2, Vec3) and WGSL.

• Integrates with Bevy seamlessly
• Same results on the CPU and GPU (not bit-level perfect, though)

Features

• simplex_noise_2d
• simplex_noise_2d_seeded
• simplex_noise_3d
• simplex_noise_3d_seeded
• fbm_simplex_2d
• fbm_simplex_2d_seeded
• fbm_simplex_3d
• fbm_simplex_3d_seeded
• worley_2d

Usage

From Rust

Zero initialization, just call the noise functions:

use bevy::prelude::*;
use noisy_bevy::simplex_noise_2d;

let p = Vec2::new(12.3, 45.6);
let value = simplex_noise_2d(p);

From WGSL shaders

First add the plugin to the Bevy app:

App::new()
    .add_plugins(NoisyShaderPlugin)

Then use it in your shaders:

#import noisy_bevy::simplex_noise_2d

// ...

let p = vec2(12.3, 45.6);
let value = simplex_noise_2d(p);

See the asteroids example, for an example that uses noise to procedurally generate a tilemap on the CPU and a matching background in a wgsl shader.

Bevy Version Support

The main branch targets the latest bevy release.

License

MIT

The original simplex noise source is MIT-only, however all changes made by me or PRs to this repo are also available under Apache-2.0.

Acknowledgments

The noise primitives are ports/copies of these

• https://github.com/stegu/psrdnoise
• https://gist.github.com/munrocket/236ed5ba7e409b8bdf1ff6eca5dcdc39
• https://github.com/bevy-interstellar/wgsl_noise

Contributions

PRs welcome!