Amplitude of the longest wave, metres. Shorter waves scale down with their wavelength (constant steepness).
0 … 1: horizontal displacement that sharpens crests and flattens troughs (1 = circular orbits, capped before crests fold).
Number of waves summed, 0 … 16. More = less regular, a little more GPU time.
Wind direction as [x, z] in the surface's tangent plane (east, south). Normalised internally.
Seed for wavelength jitter and directions.
Time multiplier (1 = real deep-water speed).
0 … 1: how far wave directions fan out from the wind (1 = up to ±90°).
Shortest and longest wavelength, metres.
A parametric set of Gerstner waves: a wind sea built from a handful of numbers.