Most basic 1D noise generating (running from 0 - 1)

basic-noise.js

export const generateNoise = (scale = 0.01, resolution = 1024) => {
    let currentScale = scale;
    let currentResolution = resolution >= 2 ? resolution : 2;
    const randomArray = Array(currentResolution)
        .fill(0)
        .map(() => Math.random());
    return {
        noiseAt: pos => {
            const currentSeed = scale * pos;
            const frag = currentSeed % 1;
            const smooth = Math.pow(frag, 2) * (3 - 2 * frag);
            const min = Math.floor(currentSeed) % (currentResolution - 1);
            const max = min + 1;
            return randomArray[min] * (1 - smooth) + randomArray[max] * smooth;
        },
        updateScale: (updateScale = scale) => {
            if (updateScale !== currentScale) {
                currentScale = updateScale;
            }
        },
    };
};