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https://github.com/photonstorm/phaser
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30 lines
795 B
JavaScript
30 lines
795 B
JavaScript
/**
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* @author Richard Davey <rich@photonstorm.com>
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* @copyright 2018 Photon Storm Ltd.
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* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
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*/
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var Angle = require('./Angle');
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var NormalAngle = require('./NormalAngle');
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/**
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* Returns the reflected angle between two lines.
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* This is the outgoing angle based on the angle of Line 1 and the normalAngle of Line 2.
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*/
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/**
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* [description]
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*
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* @function Phaser.Geom.Line.ReflectAngle
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* @since 3.0.0
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*
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* @param {Phaser.Geom.Line} lineA - [description]
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* @param {Phaser.Geom.Line} lineB - [description]
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*
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* @return {number} [description]
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*/
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var ReflectAngle = function (lineA, lineB)
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{
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return (2 * NormalAngle(lineB) - Math.PI - Angle(lineA));
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};
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module.exports = ReflectAngle;
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