SIMDNoise

Super fast SIMD noise library for Rust. PRs welcome! This library was created by Jack Mott. The current maintainer is Peter Reijnders.

Features

• Gradient Noise (Simplex aka Perlin) 1D,2D,3D,4D
• Fractal Brownian Motion, Ridge, and Turbulence
• Cellular Noise (aka Voroni) 2D, 3D
• SSE2, SSE41, and AVX2 instruction sets, along with non SIMD fallback
• AVX2 version also leverages FMA3
• Runtime detection picks the best available instruction set
• Provide a seed value to randomize your noise result

Benchmarks

Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz Single Threaded using Criterion.rs

2D 4k (3840 × 2160) Fbm Noise, 3 Octaves

SIMD Set	Time
scalar	888 ms
sse2	225 ms
sse41	186 ms
avx2	108 ms

3D 128 × 128 x 128 Cell Noise

SIMD Set	Time
scalar	1,400 ms
sse2	128 ms
sse41	94 ms
avx2	47 ms

Todo

• AVX512 support
• ARM NEON support
• Other noise types

Get a block of noise with runtime SIMD detection

The library will, at runtime, pick the fastest available options between SSE2, SSE41, and AVX2.

// Get a block of 2d fbm noise with default settings, 100 x 100, with values scaled to the range [0,1]
let noise = NoiseBuilder::fbm_2d(100, 100).generate_scaled(0.0, 1.0);

// Get a block of 3d ridge noise, custom settings, 32x32x32 unscaled
let (noise, min, max) = NoiseBuilder::ridge_3d(32, 32, 32)
    .with_freq_3d(0.05, 0.04, 0.01)
    .with_octaves(5)
    .with_gain(2.0)
    .with_seed(1337)
    .with_lacunarity(0.5)
    .generate();

Call noise functions directly

Sometimes you need something other than a block, like the points on the surface of a sphere. Sometimes you may want to use SSE41 even with AVX2 is available.

let noise_setting = NoiseBuilder::ridge_3d(32, 32, 32)
    .with_freq_3d(0.05, 0.04, 0.01)
    .with_octaves(5)
    .with_gain(2.0)
    .with_lacunarity(0.5)
    .wrap();

// get a block of noise with the sse41 version, using the above settings
let (noise, min, max) = unsafe { simdnoise::intrinsics::sse41::get_2d_noise(&noise_setting) };

// send your own SIMD x,y values to the noise functions directly
unsafe {
    // sse2 simplex noise
    let x = _mm_set1_ps(5.0);
    let y = _mm_set1_ps(10.0);
    let f: __m128 = simdnoise::intrinsics::sse2::simplex_2d(x, y);

    // avx2 turbulence
    let x = _mm256_set1_ps(5.0);
    let y = _mm256_set1_ps(10.0);
    let freq = _mm256_set1_ps(1.0);
    let lacunarity = _mm256_set1_ps(0.5);
    let gain = _mm256_set1_ps(2.0);
    let octaves = 3;
    let seed = 1337;
    let f_turbulence: __m256 = simdnoise::intrinsics::avx2::turbulence_2d(x, y, lacunarity, gain, octaves, seed);
};