luau_noise

The Perlin noise of Luau's math.noise, for a field chain's kernel: zero_luau_noise(x, y, z) answers what math.noise(x, y, z) answers on the CPU, from the same permutation table (ZERO_LUAU_NOISE_HASH) and gradient table (ZERO_LUAU_NOISE_GRADIENT). The value is about -1 to 1, 0 at every whole-number point, and repeats every 256 units in each axis; the coordinates are wrapped into that period first.

#include "@builtin::systems.procgen.kernels.luau_noise"

fn ripple(p: vec3<f32>) -> f32 { return zero_luau_noise(p.x, p.y, p.z); }

The math.noise node of nodes/math.nodebox (the noise operation of proc.fieldc.operators) includes this module in the chain it writes.