arcade-physics/lib/math/interpolation/BezierInterpolation.js

Use Arcade Physics without Phaser.

"use strict";
/**
 * @author       Richard Davey <rich@photonstorm.com>
 * @copyright    2020 Photon Storm Ltd.
 * @license      {@link https://opensource.org/licenses/MIT|MIT License}
 */
var __importDefault = (this && this.__importDefault) || function (mod) {
    return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
const Bernstein_1 = __importDefault(require("../Bernstein"));
/**
 * A bezier interpolation method.
 *
 * @function Phaser.Math.Interpolation.Bezier
 * @since 3.0.0
 *
 * @param {number[]} v - The input array of values to interpolate between.
 * @param {number} k - The percentage of interpolation, between 0 and 1.
 *
 * @return {number} The interpolated value.
 */
const BezierInterpolation = (v, k) => {
    let b = 0;
    const n = v.length - 1;
    for (let i = 0; i <= n; i++) {
        b += Math.pow(1 - k, n - i) * Math.pow(k, i) * v[i] * (0, Bernstein_1.default)(n, i);
    }
    return b;
};
exports.default = BezierInterpolation;
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