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Random.js
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Random.js
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/**
* @author Richard Davey <rich@phaser.io>
* @copyright 2013-2024 Phaser Studio Inc.
* @license {@link https://opensource.org/licenses/MIT|MIT License}
*/
var Point = 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.
*/
var Random = function (ellipse, out)
{
if (out === undefined) { out = new Point(); }
var p = Math.random() * Math.PI * 2;
var 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;
};
module.exports = Random;