arcade-physics/lib/geom/ellipse/Random.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 Point_1 = __importDefault(require("../point/Point"));
/**
 * Returns a uniformly distributed random point from anywhere within the given Ellipse.
 *
 * @function Phaser.Geom.Ellipse.Random
 * @since 3.0.0
 *
 * @generic {Phaser.Geom.Point} O - [out,$return]
 *
 * @param {Phaser.Geom.Ellipse} ellipse - The Ellipse to get a random point from.
 * @param {(Phaser.Geom.Point|object)} [out] - A Point or point-like object to set the random `x` and `y` values in.
 *
 * @return {(Phaser.Geom.Point|object)} A Point object with the random values set in the `x` and `y` properties.
 */
const Random = (ellipse, out) => {
    if (out === undefined) {
        out = new Point_1.default();
    }
    const p = Math.random() * Math.PI * 2;
    const s = Math.sqrt(Math.random());
    out.x = ellipse.x + (s * Math.cos(p) * ellipse.width) / 2;
    out.y = ellipse.y + (s * Math.sin(p) * ellipse.height) / 2;
    return out;
};
exports.default = Random;
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