mirror of
https://github.com/photonstorm/phaser
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26 lines
890 B
JavaScript
26 lines
890 B
JavaScript
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/**
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* Returns a uniformly distributed random point from anywhere within this Circle.
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*
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* @method Phaser.Circle#random
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* @param {Phaser.Point|object} [out] - A Phaser.Point, or any object with public x/y properties, that the values will be set in.
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* If no object is provided a new Phaser.Point object will be created. In high performance areas avoid this by re-using an existing object.
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* @return {Phaser.Point} An object containing the random point in its `x` and `y` properties.
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*/
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var Random = function (circle, out)
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{
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if (out === undefined) { out = { x: 0, y: 0 }; }
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var t = 2 * Math.PI * Math.random();
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var u = Math.random() + Math.random();
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var r = (u > 1) ? 2 - u : u;
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var x = r * Math.cos(t);
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var y = r * Math.sin(t);
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out.x = circle.x + (x * circle.radius);
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out.y = circle.y + (y * circle.radius);
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return out;
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};
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module.exports = Random;
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