ts-useful/lib/es2020/decasteljau.js

Functions for animation, color transitions, ecliptic, bezier, decasteljau, curves, three dimensional curves, smooth scrolling, random range, randomItem, mobius index, vectors, physics vectors, and easing.

import { Lerp } from './lerp';
/**
 *
 * @param points number[]
 * @param percent number
 * @returns number
 */
export const Decasteljau = (points, percent) => {
    if (points.length === 1)
        return points[0];
    const results = [...points];
    const calc = (p) => {
        for (let i = 0, e = p.length - 1; i < e; i++)
            results[i] = Lerp(p[i], p[i + 1], percent);
        results.pop();
        return results.length === 1 ? results[0] : calc(results);
    };
    return calc(results);
};
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