fast-noise-lite-ts/dist/fractal/ridged.js

A fast and lightweight noise generation library for JavaScript

import { generateNoiseSingleR2, generateNoiseSingleR3 } from "../noise";
import { lerp } from "../utilities";
export function generateFractalRidgedR2(options, x, y) {
    options.seed++;
    let sum = 0;
    let amp = options.fractalBounding;
    for (let i = 0; i < options.octaves; i++) {
        let noise = Math.abs(generateNoiseSingleR2(options, x, y));
        sum += (noise * -2 + 1) * amp;
        amp *= lerp(1.0, 1 - noise, (options.weightedStrength ?? 0.0));
        x *= options.lacunarity;
        y *= options.lacunarity;
        amp *= options.gain;
    }
    return sum;
}
export function generateFractalRidgedR3(options, x, y, z) {
    options.seed++;
    let sum = 0;
    let amp = options.fractalBounding;
    for (let i = 0; i < options.octaves; i++) {
        let noise = Math.abs(generateNoiseSingleR3(options, x, y, z));
        sum += (noise * -2 + 1) * amp;
        amp *= lerp(1.0, 1 - noise, (options.weightedStrength ?? 0.0));
        x *= options.lacunarity;
        y *= options.lacunarity;
        z *= options.lacunarity;
        amp *= options.gain;
    }
    return sum;
}