SIMDNoise

Super fast SIMD noise library for Rust. PRs welcome!
Available on crates.io.
See above crates.io link for Docs.

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

Benchmarks

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

1D 1024 points of Fbm Noise, 3 Octaves

2D 256x256 Fbm Noise, 3 Octaves

3D 32x32x32 Fbm Noise, 3 Octaves

4D 8x8x8x8 Fbm Noise, 3 Octaves

2D 1024x1024 Cell Noise

3D 32x32x32 Cell Noise

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

use simdnoise::*;

// Set up noise type and parameters
let noise_type = simdnoise::NoiseType::Fbm {
      freq: 0.04,
      lacunarity: 0.5,
      gain: 2.0,
      octaves: 3,
}; 

// Get a block of 2d 800x600 noise, with no scaling of resulting values
// min and max values are returned so you can apply your own scaling
let (an_f32_vec,min,max) = simdnoise::get_2d_noise(0.0, 800, 0.0, 600, noise_type);

// Get a block of 200x200x200 3d noise
let (an_f32_vec,min,max) = simdnoise::get_3d_noise(0.0, 200, 0.0, 200,0.0, 200, noise_type);

// Get a block of noise scaled between -1 and 1
let an_f32_vec = simdnoise::get_2d_scaled_noise(0.0, 800, 0.0, 600, noise_type,-1.0,1.0);

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

// get a block of 100x100 sse41 noise, skip runtime detection
let (noise,min,max) = simdnoise::sse41::get_2d_noise(0.0,100,0.0,100,noise_type);

// 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::sse2::simplex_2d(x,y);
  
  // avx2 turbulence
  let x = _mm256_set1_ps(5.0);
  let y = _mm256_set1_ps(10.0);
  let freq = _mm_256_set1_ps(1.0);
  let lacunarity = _mm256_set1_ps(0.5);
  let gain = _mm256_set1_ps(2.0);
  let octaves = 3;
  let f_turbulence : __m256 = simdnoise::avx2::turbulence_2d(x,y,freq,lacunarity,gain,octaves);
    
}