perlin3D
perlin3D(
x,y,z,seed?):number
Defined in: src/modules/noise/noise.ts:284
Perlin gradient noise, 3D — the canonical construction, and exactly 0 at
every integer lattice point.
The gradients are the 12 canonical edge directions, normalized to unit
length and then scaled by sqrt(2), which reproduces Perlin’s
improved noise reference field magnitude (that implementation uses the same
directions at length sqrt(2), unscaled). Its range is therefore
approximately [-1, 1], like the reference’s: a lattice sweep reaches
about 0.9 and dense sampling comes within a hair of 1. Two caveats come
with the territory. A cell centre whose eight gradients all align lands one
ulp outside (1.0000000000000002, about one cell in 70 000). And the
construction’s true ceiling is sqrt(2) * 0.7328 = 1.0364, since an edge
gradient cannot point along a cell diagonal — reachable only for a rare
gradient configuration, not for anything a game samples.
Parameters
Section titled “Parameters”number
number
number
number = 0
Returns
Section titled “Returns”number