docs/Line.js.html

<!DOCTYPE html>

<html lang="en">
<head>
	<meta charset="utf-8">
	<title>Phaser Source: geom/Line.js</title>

	<!--[if lt IE 9]>
	<script src="//html5shiv.googlecode.com/svn/trunk/html5.js"></script>
	<![endif]-->
	<link type="text/css" rel="stylesheet" href="styles/sunlight.default.css">

	
	<link type="text/css" rel="stylesheet" href="styles/site.cerulean.css">
	
</head>

<body>
<div class="container-fluid">
	<div class="navbar navbar-fixed-top navbar-inverse">
		<div class="navbar-inner">
			<a class="brand" href="index.html">Phaser</a>
			<ul class="nav">
				
				<li class="dropdown">
					<a href="namespaces.list.html" class="dropdown-toggle" data-toggle="dropdown">Namespaces<b
						class="caret"></b></a>

					<ul class="dropdown-menu ">
						
						<li class="class-depth-0">
							<a href="Phaser.html">Phaser</a>
						</li>
						

					</ul>
				</li>
				
				<li class="dropdown">
					<a href="classes.list.html" class="dropdown-toggle" data-toggle="dropdown">Classes<b
						class="caret"></b></a>

					<ul class="dropdown-menu ">
						
						<li class="class-depth-1">
							<a href="Phaser.Animation.html">Animation</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.AnimationManager.html">AnimationManager</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.AnimationParser.html">AnimationParser</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.ArrayList.html">ArrayList</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.BitmapData.html">BitmapData</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.BitmapText.html">BitmapText</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Button.html">Button</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Cache.html">Cache</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Camera.html">Camera</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Canvas.html">Canvas</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Circle.html">Circle</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Color.html">Color</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Device.html">Device</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Easing.html">Easing</a>
						</li>
						
						<li class="class-depth-2">
							<a href="Phaser.Easing.Back.html">Back</a>
						</li>
						
						<li class="class-depth-2">
							<a href="Phaser.Easing.Bounce.html">Bounce</a>
						</li>
						
						<li class="class-depth-2">
							<a href="Phaser.Easing.Circular.html">Circular</a>
						</li>
						
						<li class="class-depth-2">
							<a href="Phaser.Easing.Cubic.html">Cubic</a>
						</li>
						
						<li class="class-depth-2">
							<a href="Phaser.Easing.Elastic.html">Elastic</a>
						</li>
						
						<li class="class-depth-2">
							<a href="Phaser.Easing.Exponential.html">Exponential</a>
						</li>
						
						<li class="class-depth-2">
							<a href="Phaser.Easing.Linear.html">Linear</a>
						</li>
						
						<li class="class-depth-2">
							<a href="Phaser.Easing.Quadratic.html">Quadratic</a>
						</li>
						
						<li class="class-depth-2">
							<a href="Phaser.Easing.Quartic.html">Quartic</a>
						</li>
						
						<li class="class-depth-2">
							<a href="Phaser.Easing.Quintic.html">Quintic</a>
						</li>
						
						<li class="class-depth-2">
							<a href="Phaser.Easing.Sinusoidal.html">Sinusoidal</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Ellipse.html">Ellipse</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Events.html">Events</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Filter.html">Filter</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.FlexGrid.html">FlexGrid</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.FlexLayer.html">FlexLayer</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Frame.html">Frame</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.FrameData.html">FrameData</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Game.html">Game</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.GameObjectCreator.html">GameObjectCreator</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.GameObjectFactory.html">GameObjectFactory</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Gamepad.html">Gamepad</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.GamepadButton.html">GamepadButton</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Graphics.html">Graphics</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Group.html">Group</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Image.html">Image</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Input.html">Input</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.InputHandler.html">InputHandler</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Key.html">Key</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Keyboard.html">Keyboard</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Line.html">Line</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.LinkedList.html">LinkedList</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Loader.html">Loader</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.LoaderParser.html">LoaderParser</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Math.html">Math</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Mouse.html">Mouse</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.MSPointer.html">MSPointer</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Net.html">Net</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Particle.html">Particle</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Particles.html">Particles</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Particles.Arcade.Emitter.html">Emitter</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Physics.html">Physics</a>
						</li>
						
						<li class="class-depth-2">
							<a href="Phaser.Physics.Arcade.html">Arcade</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.Arcade.Body.html">Body</a>
						</li>
						
						<li class="class-depth-2">
							<a href="Phaser.Physics.Ninja.html">Ninja</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.Ninja.AABB.html">AABB</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.Ninja.Body.html">Body</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.Ninja.Circle.html">Circle</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.Ninja.Tile.html">Tile</a>
						</li>
						
						<li class="class-depth-2">
							<a href="Phaser.Physics.P2.html">P2</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.P2.Body.html">Body</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.P2.BodyDebug.html">BodyDebug</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.P2.CollisionGroup.html">CollisionGroup</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.P2.ContactMaterial.html">ContactMaterial</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.P2.DistanceConstraint.html">DistanceConstraint</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.P2.FixtureList.html">FixtureList</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.P2.GearConstraint.html">GearConstraint</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.P2.InversePointProxy.html">InversePointProxy</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.P2.LockConstraint.html">LockConstraint</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.P2.Material.html">Material</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.P2.PointProxy.html">PointProxy</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.P2.PrismaticConstraint.html">PrismaticConstraint</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.P2.RevoluteConstraint.html">RevoluteConstraint</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.P2.RotationalSpring.html">RotationalSpring</a>
						</li>
						
						<li class="class-depth-3">
							<a href="Phaser.Physics.P2.Spring.html">Spring</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Plugin.html">Plugin</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.PluginManager.html">PluginManager</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Point.html">Point</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Pointer.html">Pointer</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Polygon.html">Polygon</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.QuadTree.html">QuadTree</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.RandomDataGenerator.html">RandomDataGenerator</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Rectangle.html">Rectangle</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.RenderTexture.html">RenderTexture</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.RequestAnimationFrame.html">RequestAnimationFrame</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.RetroFont.html">RetroFont</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Rope.html">Rope</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.ScaleManager.html">ScaleManager</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Signal.html">Signal</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.SignalBinding.html">SignalBinding</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.SinglePad.html">SinglePad</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Sound.html">Sound</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.SoundManager.html">SoundManager</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Sprite.html">Sprite</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.SpriteBatch.html">SpriteBatch</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Stage.html">Stage</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.State.html">State</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.StateManager.html">StateManager</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Text.html">Text</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Tile.html">Tile</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Tilemap.html">Tilemap</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.TilemapLayer.html">TilemapLayer</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.TilemapParser.html">TilemapParser</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Tileset.html">Tileset</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.TileSprite.html">TileSprite</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Time.html">Time</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Timer.html">Timer</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.TimerEvent.html">TimerEvent</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Touch.html">Touch</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Tween.html">Tween</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.TweenManager.html">TweenManager</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.Utils.html">Utils</a>
						</li>
						
						<li class="class-depth-2">
							<a href="Phaser.Utils.Debug.html">Debug</a>
						</li>
						
						<li class="class-depth-1">
							<a href="Phaser.World.html">World</a>
						</li>
						

					</ul>
				</li>
				
				
			</ul>
		</div>
	</div>

	<div class="row-fluid">

		
			<div class="span12">
				
				<div id="main">
					

		<h1 class="page-title">Source: geom/Line.js</h1>
    
    <section>
        <article>
            <pre class="sunlight-highlight-javascript linenums">/**
* @author       Richard Davey &lt;rich@photonstorm.com>
* @copyright    2014 Photon Storm Ltd.
* @license      {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/

/**
* Creates a new Line object with a start and an end point.
* @class Line
* @classdesc Phaser - Line
* @constructor
* @param {number} [x1=0] - The x coordinate of the start of the line.
* @param {number} [y1=0] - The y coordinate of the start of the line.
* @param {number} [x2=0] - The x coordinate of the end of the line.
* @param {number} [y2=0] - The y coordinate of the end of the line.
* @return {Phaser.Line} This line object
*/
Phaser.Line = function (x1, y1, x2, y2) {

    x1 = x1 || 0;
    y1 = y1 || 0;
    x2 = x2 || 0;
    y2 = y2 || 0;

    /**
    * @property {Phaser.Point} start - The start point of the line.
    */
    this.start = new Phaser.Point(x1, y1);

    /**
    * @property {Phaser.Point} end - The end point of the line.
    */
    this.end = new Phaser.Point(x2, y2);

};

Phaser.Line.prototype = {

    /**
    * Sets the components of the Line to the specified values.
    * @method Phaser.Line#setTo
    * @param {number} [x1=0] - The x coordinate of the start of the line.
    * @param {number} [y1=0] - The y coordinate of the start of the line.
    * @param {number} [x2=0] - The x coordinate of the end of the line.
    * @param {number} [y2=0] - The y coordinate of the end of the line.
    * @return {Phaser.Line} This line object
    */
    setTo: function (x1, y1, x2, y2) {

        this.start.setTo(x1, y1);
        this.end.setTo(x2, y2);

        return this;

    },

    /**
    * Sets the line to match the x/y coordinates of the two given sprites.
    * Can optionally be calculated from their center coordinates.
    * @method Phaser.Line#fromSprite
    * @param {Phaser.Sprite} startSprite - The coordinates of this Sprite will be set to the Line.start point.
    * @param {Phaser.Sprite} endSprite - The coordinates of this Sprite will be set to the Line.start point.
    * @param {boolean} [useCenter=false] - If true it will use startSprite.center.x, if false startSprite.x. Note that Sprites don't have a center property by default, so only enable if you've over-ridden your Sprite with a custom class.
    * @return {Phaser.Line} This line object
    */
    fromSprite: function (startSprite, endSprite, useCenter) {

        if (typeof useCenter === 'undefined') { useCenter = false; }

        if (useCenter)
        {
            return this.setTo(startSprite.center.x, startSprite.center.y, endSprite.center.x, endSprite.center.y);
        }
        else
        {
            return this.setTo(startSprite.x, startSprite.y, endSprite.x, endSprite.y);
        }

    },

    /**
    * Checks for intersection between this line and another Line.
    * If asSegment is true it will check for segment intersection. If asSegment is false it will check for line intersection.
    * Returns the intersection segment of AB and EF as a Point, or null if there is no intersection.
    *
    * @method Phaser.Line#intersects
    * @param {Phaser.Line} line - The line to check against this one.
    * @param {boolean} [asSegment=true] - If true it will check for segment intersection, otherwise full line intersection.
    * @param {Phaser.Point} [result] - A Point object to store the result in, if not given a new one will be created.
    * @return {Phaser.Point} The intersection segment of the two lines as a Point, or null if there is no intersection.
    */
    intersects: function (line, asSegment, result) {

        return Phaser.Line.intersectsPoints(this.start, this.end, line.start, line.end, asSegment, result);

    },

    /**
    * Tests if the given coordinates fall on this line. See pointOnSegment to test against just the line segment.
    * @method Phaser.Line#pointOnLine
    * @param {number} x - The line to check against this one.
    * @param {number} y - The line to check against this one.
    * @return {boolean} True if the point is on the line, false if not.
    */
    pointOnLine: function (x, y) {

        return ((x - this.start.x) * (this.end.y - this.start.y) === (this.end.x - this.start.x) * (y - this.start.y));

    },

    /**
    * Tests if the given coordinates fall on this line and within the segment. See pointOnLine to test against just the line.
    * @method Phaser.Line#pointOnSegment
    * @param {number} x - The line to check against this one.
    * @param {number} y - The line to check against this one.
    * @return {boolean} True if the point is on the line and segment, false if not.
    */
    pointOnSegment: function (x, y) {

        var xMin = Math.min(this.start.x, this.end.x);
        var xMax = Math.max(this.start.x, this.end.x);
        var yMin = Math.min(this.start.y, this.end.y);
        var yMax = Math.max(this.start.y, this.end.y);

        return (this.pointOnLine(x, y) && (x >= xMin && x &lt;= xMax) && (y >= yMin && y &lt;= yMax));

    },

    /**
    * Using Bresenham's line algorithm this will return an array of all coordinates on this line.
    * The start and end points are rounded before this runs as the algorithm works on integers.
    *
    * @method Phaser.Line#coordinatesOnLine
    * @param {number} [stepRate=1] - How many steps will we return? 1 = every coordinate on the line, 2 = every other coordinate, etc.
    * @param {array} [results] - The array to store the results in. If not provided a new one will be generated.
    * @return {array} An array of coordinates.
    */
    coordinatesOnLine: function (stepRate, results) {

        if (typeof stepRate === 'undefined') { stepRate = 1; }
        if (typeof results === 'undefined') { results = []; }

        var x1 = Math.round(this.start.x);
        var y1 = Math.round(this.start.y);
        var x2 = Math.round(this.end.x);
        var y2 = Math.round(this.end.y);

        var dx = Math.abs(x2 - x1);
        var dy = Math.abs(y2 - y1);
        var sx = (x1 &lt; x2) ? 1 : -1;
        var sy = (y1 &lt; y2) ? 1 : -1;
        var err = dx - dy;

        results.push([x1, y1]);

        var i = 1;

        while (!((x1 == x2) && (y1 == y2)))
        {
            var e2 = err &lt;&lt; 1;

            if (e2 > -dy)
            {
                err -= dy;
                x1 += sx;
            }

            if (e2 &lt; dx)
            {
                err += dx;
                y1 += sy;
            }

            if (i % stepRate === 0)
            {
                results.push([x1, y1]);
            }

            i++;

        }

        return results;

    },

    /**
     * Returns a new Line object with the same values for the start and end properties as this Line object.
     * @method Phaser.Line#clone
     * @param {Phaser.Line} output - Optional Line object. If given the values will be set into the object, otherwise a brand new Line object will be created and returned.
     * @return {Phaser.Line} The cloned Line object.
     */
    clone: function (output) {

        if (typeof output === "undefined" || output === null)
        {
            output = new Phaser.Line(this.start.x, this.start.y, this.end.x, this.end.y);
        }
        else
        {
            output.setTo(this.start.x, this.start.y, this.end.x, this.end.y);
        }

        return output;

    }

};

/**
* @name Phaser.Line#length
* @property {number} length - Gets the length of the line segment.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "length", {

    get: function () {
        return Math.sqrt((this.end.x - this.start.x) * (this.end.x - this.start.x) + (this.end.y - this.start.y) * (this.end.y - this.start.y));
    }

});

/**
* @name Phaser.Line#angle
* @property {number} angle - Gets the angle of the line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "angle", {

    get: function () {
        return Math.atan2(this.end.y - this.start.y, this.end.x - this.start.x);
    }

});

/**
* @name Phaser.Line#slope
* @property {number} slope - Gets the slope of the line (y/x).
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "slope", {

    get: function () {
        return (this.end.y - this.start.y) / (this.end.x - this.start.x);
    }

});

/**
* @name Phaser.Line#perpSlope
* @property {number} perpSlope - Gets the perpendicular slope of the line (x/y).
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "perpSlope", {

    get: function () {
        return -((this.end.x - this.start.x) / (this.end.y - this.start.y));
    }

});

/**
* @name Phaser.Line#x
* @property {number} x - Gets the x coordinate of the top left of the bounds around this line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "x", {

    get: function () {
        return Math.min(this.start.x, this.end.x);
    }

});

/**
* @name Phaser.Line#y
* @property {number} y - Gets the y coordinate of the top left of the bounds around this line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "y", {

    get: function () {
        return Math.min(this.start.y, this.end.y);
    }

});

/**
* @name Phaser.Line#left
* @property {number} left - Gets the left-most point of this line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "left", {

    get: function () {
        return Math.min(this.start.x, this.end.x);
    }

});

/**
* @name Phaser.Line#right
* @property {number} right - Gets the right-most point of this line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "right", {

    get: function () {
        return Math.max(this.start.x, this.end.x);
    }

});

/**
* @name Phaser.Line#top
* @property {number} top - Gets the top-most point of this line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "top", {

    get: function () {
        return Math.min(this.start.y, this.end.y);
    }

});

/**
* @name Phaser.Line#bottom
* @property {number} bottom - Gets the bottom-most point of this line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "bottom", {

    get: function () {
        return Math.max(this.start.y, this.end.y);
    }

});

/**
* @name Phaser.Line#width
* @property {number} width - Gets the width of this bounds of this line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "width", {

    get: function () {
        return Math.abs(this.start.x - this.end.x);
    }

});

/**
* @name Phaser.Line#height
* @property {number} height - Gets the height of this bounds of this line.
* @readonly
*/
Object.defineProperty(Phaser.Line.prototype, "height", {

    get: function () {
        return Math.abs(this.start.y - this.end.y);
    }

});

/**
* Checks for intersection between two lines as defined by the given start and end points.
* If asSegment is true it will check for line segment intersection. If asSegment is false it will check for line intersection.
* Returns the intersection segment of AB and EF as a Point, or null if there is no intersection.
* Adapted from code by Keith Hair
*
* @method Phaser.Line.intersectsPoints
* @param {Phaser.Point} a - The start of the first Line to be checked.
* @param {Phaser.Point} b - The end of the first line to be checked.
* @param {Phaser.Point} e - The start of the second Line to be checked.
* @param {Phaser.Point} f - The end of the second line to be checked.
* @param {boolean} [asSegment=true] - If true it will check for segment intersection, otherwise full line intersection.
* @param {Phaser.Point} [result] - A Point object to store the result in, if not given a new one will be created.
* @return {Phaser.Point} The intersection segment of the two lines as a Point, or null if there is no intersection.
*/
Phaser.Line.intersectsPoints = function (a, b, e, f, asSegment, result) {

    if (typeof asSegment === 'undefined') { asSegment = true; }
    if (typeof result === 'undefined') { result = new Phaser.Point(); }

    var a1 = b.y - a.y;
    var a2 = f.y - e.y;
    var b1 = a.x - b.x;
    var b2 = e.x - f.x;
    var c1 = (b.x * a.y) - (a.x * b.y);
    var c2 = (f.x * e.y) - (e.x * f.y);
    var denom = (a1 * b2) - (a2 * b1);

    if (denom === 0)
    {
        return null;
    }

    result.x = ((b1 * c2) - (b2 * c1)) / denom;
    result.y = ((a2 * c1) - (a1 * c2)) / denom;

    if (asSegment)
    {
        var uc = ((f.y-e.y)*(b.x-a.x) - (f.x-e.x)*(b.y- a.y));
        var ua = (((f.x-e.x)*(a.y-e.y)) - (f.y-e.y)*(a.x-e.x)) / uc;
        var ub = (((b.x- a.x)*(a.y- e.y)) - ((b.y-a.y)*(a.x- e.x))) / uc;
        if (ua >=0 && ua&lt;=1 && ub >=0 && ub &lt;=1) {
            return result;
        } else {
            return null;
        }
    }

    return result;

};

/**
* Checks for intersection between two lines.
* If asSegment is true it will check for segment intersection.
* If asSegment is false it will check for line intersection.
* Returns the intersection segment of AB and EF as a Point, or null if there is no intersection.
* Adapted from code by Keith Hair
*
* @method Phaser.Line.intersects
* @param {Phaser.Line} a - The first Line to be checked.
* @param {Phaser.Line} b - The second Line to be checked.
* @param {boolean} [asSegment=true] - If true it will check for segment intersection, otherwise full line intersection.
* @param {Phaser.Point} [result] - A Point object to store the result in, if not given a new one will be created.
* @return {Phaser.Point} The intersection segment of the two lines as a Point, or null if there is no intersection.
*/
Phaser.Line.intersects = function (a, b, asSegment, result) {

    return Phaser.Line.intersectsPoints(a.start, a.end, b.start, b.end, asSegment, result);

};
</pre>
        </article>
    </section>


				</div>

				<div class="clearfix"></div>
				<footer>
					
					
		<span class="copyright">
		Phaser Copyright © 2012-2014 Photon Storm Ltd.
		</span>
					<br />
					
		<span class="jsdoc-message">
		Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.3.0-dev</a>
		on Tue Sep 09 2014 15:29:17 GMT+0100 (BST) using the <a href="https://github.com/terryweiss/docstrap">DocStrap template</a>.
		</span>
				</footer>
			</div>

			
			<br clear="both">
		</div>

	</div>
	<script src="scripts/sunlight.js"></script>
	<script src="scripts/sunlight.javascript.js"></script>
	<script src="scripts/sunlight-plugin.doclinks.js"></script>
	<script src="scripts/sunlight-plugin.linenumbers.js"></script>
	<script src="scripts/sunlight-plugin.menu.js"></script>
	<script src="scripts/jquery.min.js"></script>
	<script src="scripts/jquery.scrollTo.js"></script>
	<script src="scripts/jquery.localScroll.js"></script>
	<script src="scripts/bootstrap-dropdown.js"></script>
	<script src="scripts/toc.js"></script>


	<script>  Sunlight.highlightAll({lineNumbers:true,  showMenu: true, enableDoclinks :true}); </script>

	<script>
		$( function () {
			$( "#toc" ).toc( {
				anchorName  : function(i, heading, prefix) {
					return $(heading).attr("id") || ( prefix + i );
				},
				selectors   : "h1,h2,h3,h4",
				showAndHide : false,
				scrollTo    : 60
			} );
			$( "#toc>ul" ).addClass( "nav nav-pills nav-stacked" );
			$( "#main span[id^='toc']" ).addClass( "toc-shim" );

		} );
	</script>

	
</body>
</html>