fast-noise-lite-ts/dist/noise/value.js

A fast and lightweight noise generation library for JavaScript

import { prime } from "../constants";
import { interpolateHermite, lerp, valueCoordinateR2, valueCoordinateR3 } from "../utilities";
export function valueR2(options, x, y) {
    const seed = options.seed;
    let x0 = Math.floor(x);
    let y0 = Math.floor(y);
    let xs = interpolateHermite(x - x0);
    let ys = interpolateHermite(y - y0);
    x0 = Math.imul(x0, prime.x);
    y0 = Math.imul(y0, prime.y);
    let x1 = x0 + prime.x;
    let y1 = y0 + prime.y;
    let xf0 = lerp(valueCoordinateR2(seed, x0, y0), valueCoordinateR2(seed, x1, y0), xs);
    let xf1 = lerp(valueCoordinateR2(seed, x0, y1), valueCoordinateR2(seed, x1, y1), xs);
    return lerp(xf0, xf1, ys);
}
export function valueR3(options, x, y, z) {
    const seed = options.seed;
    let x0 = Math.floor(x);
    let y0 = Math.floor(y);
    let z0 = Math.floor(z);
    let xs = interpolateHermite(x - x0);
    let ys = interpolateHermite(y - y0);
    let zs = interpolateHermite(z - z0);
    x0 = Math.imul(x0, prime.x);
    y0 = Math.imul(y0, prime.y);
    z0 = Math.imul(z0, prime.z);
    let x1 = x0 + prime.x;
    let y1 = y0 + prime.y;
    let z1 = z0 + prime.z;
    let xf00 = lerp(valueCoordinateR3(seed, x0, y0, z0), valueCoordinateR3(seed, x1, y0, z0), xs);
    let xf10 = lerp(valueCoordinateR3(seed, x0, y1, z0), valueCoordinateR3(seed, x1, y1, z0), xs);
    let xf01 = lerp(valueCoordinateR3(seed, x0, y0, z1), valueCoordinateR3(seed, x1, y0, z1), xs);
    let xf11 = lerp(valueCoordinateR3(seed, x0, y1, z1), valueCoordinateR3(seed, x1, y1, z1), xs);
    let yf0 = lerp(xf00, xf10, ys);
    let yf1 = lerp(xf01, xf11, ys);
    return lerp(yf0, yf1, zs);
}