@azerion/phaser
Version:
A fast, free and fun HTML5 Game Framework for Desktop and Mobile web browsers.
1,568 lines (1,195 loc) • 64.5 kB
HTML
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<title>Phaser Source: src/geom/Line.js</title>
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</head>
<body>
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<div style="position: absolute; width: 143px; height: 31px; right: 10px; top: 10px; z-index: 1050"><a href="http://phaser.io"><img src="img/phaser.png" border="0" /></a></div>
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<ul class="dropdown-menu ">
<li class="class-depth-0">
<a href="Phaser.html">Phaser</a>
</li>
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<a href="PIXI.html">PIXI</a>
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<ul class="dropdown-menu ">
<li class="class-depth-0">
<a href="Event.html">Event</a>
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<li class="class-depth-0">
<a href="EventTarget.html">EventTarget</a>
</li>
<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>
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<li class="class-depth-1">
<a href="Phaser.AnimationParser.html">AnimationParser</a>
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<li class="class-depth-1">
<a href="Phaser.ArraySet.html">ArraySet</a>
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<li class="class-depth-1">
<a href="Phaser.ArrayUtils.html">ArrayUtils</a>
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<li class="class-depth-1">
<a href="Phaser.AudioSprite.html">AudioSprite</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.Bullet.html">Bullet</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-2">
<a href="Phaser.Component.Angle.html">Angle</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.Animation.html">Animation</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.AutoCull.html">AutoCull</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.Bounds.html">Bounds</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.BringToTop.html">BringToTop</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.Core.html">Core</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.Crop.html">Crop</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.Delta.html">Delta</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.Destroy.html">Destroy</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.FixedToCamera.html">FixedToCamera</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.Health.html">Health</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.InCamera.html">InCamera</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.InputEnabled.html">InputEnabled</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.InWorld.html">InWorld</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.LifeSpan.html">LifeSpan</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.LoadTexture.html">LoadTexture</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.Overlap.html">Overlap</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.PhysicsBody.html">PhysicsBody</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.Reset.html">Reset</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.ScaleMinMax.html">ScaleMinMax</a>
</li>
<li class="class-depth-2">
<a href="Phaser.Component.Smoothed.html">Smoothed</a>
</li>
<li class="class-depth-1">
<a href="Phaser.Create.html">Create</a>
</li>
<li class="class-depth-1">
<a href="Phaser.Creature.html">Creature</a>
</li>
<li class="class-depth-1">
<a href="Phaser.Device.html">Device</a>
</li>
<li class="class-depth-1">
<a href="Phaser.DeviceButton.html">DeviceButton</a>
</li>
<li class="class-depth-1">
<a href="Phaser.DOM.html">DOM</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.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.Hermite.html">Hermite</a>
</li>
<li class="class-depth-1">
<a href="Phaser.Image.html">Image</a>
</li>
<li class="class-depth-1">
<a href="Phaser.ImageCollection.html">ImageCollection</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.KeyCode.html">KeyCode</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.Matrix.html">Matrix</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-2">
<a href="Phaser.Particles.Arcade.html">Arcade</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.Path.html">Path</a>
</li>
<li class="class-depth-1">
<a href="Phaser.PathFollower.html">PathFollower</a>
</li>
<li class="class-depth-1">
<a href="Phaser.PathPoint.html">PathPoint</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-3">
<a href="Phaser.Physics.Arcade.TilemapCollision.html">TilemapCollision</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-2">
<a href="Phaser.Plugin.PathManager.html">PathManager</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.PointerMode.html">PointerMode</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.RoundedRectangle.html">RoundedRectangle</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.TweenData.html">TweenData</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.Video.html">Video</a>
</li>
<li class="class-depth-1">
<a href="Phaser.Weapon.html">Weapon</a>
</li>
<li class="class-depth-1">
<a href="Phaser.World.html">World</a>
</li>
<li class="class-depth-1">
<a href="PIXI.AbstractFilter.html">AbstractFilter</a>
</li>
<li class="class-depth-1">
<a href="PIXI.BaseTexture.html">BaseTexture</a>
</li>
<li class="class-depth-1">
<a href="PIXI.CanvasBuffer.html">CanvasBuffer</a>
</li>
<li class="class-depth-1">
<a href="PIXI.CanvasGraphics.html">CanvasGraphics</a>
</li>
<li class="class-depth-1">
<a href="PIXI.CanvasMaskManager.html">CanvasMaskManager</a>
</li>
<li class="class-depth-1">
<a href="PIXI.CanvasPool.html">CanvasPool</a>
</li>
<li class="class-depth-1">
<a href="PIXI.CanvasRenderer.html">CanvasRenderer</a>
</li>
<li class="class-depth-1">
<a href="PIXI.CanvasTinter.html">CanvasTinter</a>
</li>
<li class="class-depth-1">
<a href="PIXI.ComplexPrimitiveShader.html">ComplexPrimitiveShader</a>
</li>
<li class="class-depth-1">
<a href="PIXI.DisplayObjectContainer.html">DisplayObjectContainer</a>
</li>
<li class="class-depth-1">
<a href="PIXI.EarCut.html">EarCut</a>
</li>
<li class="class-depth-1">
<a href="PIXI.Event.html">Event</a>
</li>
<li class="class-depth-1">
<a href="PIXI.EventTarget.html">EventTarget</a>
</li>
<li class="class-depth-1">
<a href="PIXI.FilterTexture.html">FilterTexture</a>
</li>
<li class="class-depth-1">
<a href="PIXI.Graphics.html">Graphics</a>
</li>
<li class="class-depth-1">
<a href="PIXI.GraphicsData.html">GraphicsData</a>
</li>
<li class="class-depth-1">
<a href="PIXI.PIXI.html">PIXI</a>
</li>
<li class="class-depth-2">
<a href="PIXI.PIXI.DisplayObject.html">DisplayObject</a>
</li>
<li class="class-depth-1">
<a href="PIXI.PixiFastShader.html">PixiFastShader</a>
</li>
<li class="class-depth-1">
<a href="PIXI.PixiShader.html">PixiShader</a>
</li>
<li class="class-depth-1">
<a href="PIXI.PrimitiveShader.html">PrimitiveShader</a>
</li>
<li class="class-depth-1">
<a href="PIXI.RenderTexture.html">RenderTexture</a>
</li>
<li class="class-depth-1">
<a href="PIXI.Rope.html">Rope</a>
</li>
<li class="class-depth-1">
<a href="PIXI.Sprite.html">Sprite</a>
</li>
<li class="class-depth-1">
<a href="PIXI.SpriteBatch.html">SpriteBatch</a>
</li>
<li class="class-depth-1">
<a href="PIXI.Strip.html">Strip</a>
</li>
<li class="class-depth-1">
<a href="PIXI.StripShader.html">StripShader</a>
</li>
<li class="class-depth-1">
<a href="PIXI.Texture.html">Texture</a>
</li>
<li class="class-depth-1">
<a href="PIXI.TilingSprite.html">TilingSprite</a>
</li>
<li class="class-depth-1">
<a href="PIXI.WebGLBlendModeManager.html">WebGLBlendModeManager</a>
</li>
<li class="class-depth-1">
<a href="PIXI.WebGLFastSpriteBatch.html">WebGLFastSpriteBatch</a>
</li>
<li class="class-depth-1">
<a href="PIXI.WebGLFilterManager.html">WebGLFilterManager</a>
</li>
<li class="class-depth-1">
<a href="PIXI.WebGLRenderer.html">WebGLRenderer</a>
</li>
</ul>
</li>
<li class="dropdown">
<a href="global.html" class="dropdown-toggle" data-toggle="dropdown">Global<b
class="caret"></b></a>
<ul class="dropdown-menu ">
<li class="class-depth-0">
<a href="global.html#ANGLE_DOWN">ANGLE_DOWN</a>
</li>
<li class="class-depth-0">
<a href="global.html#ANGLE_LEFT">ANGLE_LEFT</a>
</li>
<li class="class-depth-0">
<a href="global.html#ANGLE_NORTH_EAST">ANGLE_NORTH_EAST</a>
</li>
<li class="class-depth-0">
<a href="global.html#ANGLE_NORTH_WEST">ANGLE_NORTH_WEST</a>
</li>
<li class="class-depth-0">
<a href="global.html#ANGLE_RIGHT">ANGLE_RIGHT</a>
</li>
<li class="class-depth-0">
<a href="global.html#ANGLE_SOUTH_EAST">ANGLE_SOUTH_EAST</a>
</li>
<li class="class-depth-0">
<a href="global.html#ANGLE_SOUTH_WEST">ANGLE_SOUTH_WEST</a>
</li>
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<h1 class="page-title">Source: src/geom/Line.js</h1>
<section>
<article>
<pre class="sunlight-highlight-javascript linenums">/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2016 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 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.
*/
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);
/**
* @property {number} type - The const type of this object.
* @readonly
*/
this.type = Phaser.LINE;
};
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 (useCenter === undefined) { useCenter = false; }
if (useCenter)
{
return this.setTo(startSprite.center.x, startSprite.center.y, endSprite.center.x, endSprite.center.y);
}
return this.setTo(startSprite.x, startSprite.y, endSprite.x, endSprite.y);
},
/**
* Sets this line to start at the given `x` and `y` coordinates and for the segment to extend at `angle` for the given `length`.
*
* @method Phaser.Line#fromAngle
* @param {number} x - The x coordinate of the start of the line.
* @param {number} y - The y coordinate of the start of the line.
* @param {number} angle - The angle of the line in radians.
* @param {number} length - The length of the line in pixels.
* @return {Phaser.Line} This line object
*/
fromAngle: function (x, y, angle, length) {
this.start.setTo(x, y);
this.end.setTo(x + (Math.cos(angle) * length), y + (Math.sin(angle) * length));
return this;
},
/**
* Rotates the line by the amount specified in `angle`.
*
* Rotation takes place from the center of the line.
* If you wish to rotate around a different point see Line.rotateAround.
*
* If you wish to rotate the ends of the Line then see Line.start.rotate or Line.end.rotate.
*
* @method Phaser.Line#rotate
* @param {number} angle - The angle in radians (unless asDegrees is true) to rotate the line by.
* @param {boolean} [asDegrees=false] - Is the given angle in radians (false) or degrees (true)?
* @return {Phaser.Line} This line object
*/
rotate: function (angle, asDegrees) {
var cx = (this.start.x + this.end.x) / 2;
var cy = (this.start.y + this.end.y) / 2;
this.start.rotate(cx, cy, angle, asDegrees);
this.end.rotate(cx, cy, angle, asDegrees);
return this;
},
/**
* Rotates the line by the amount specified in `angle`.
*
* Rotation takes place around the coordinates given.
*
* @method Phaser.Line#rotateAround
* @param {number} x - The x coordinate to offset the rotation from.
* @param {number} y - The y coordinate to offset the rotation from.
* @param {number} angle - The angle in radians (unless asDegrees is true) to rotate the line by.
* @param {boolean} [asDegrees=false] - Is the given angle in radians (false) or degrees (true)?
* @return {Phaser.Line} This line object
*/
rotateAround: function (x, y, angle, asDegrees) {
this.start.rotate(x, y, angle, asDegrees);
this.end.rotate(x, y, angle, asDegrees);
return this;
},
/**
* 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);
},
/**
* Returns the reflected angle between two lines.
* This is the outgoing angle based on the angle of this line and the normalAngle of the given line.
*
* @method Phaser.Line#reflect
* @param {Phaser.Line} line - The line to reflect off this line.
* @return {number} The reflected angle in radians.
*/
reflect: function (line) {
return Phaser.Line.reflect(this, line);
},
/**
* Returns a Point object where the x and y values correspond to the center (or midpoint) of the Line segment.
*
* @method Phaser.Line#midPoint
* @param {Phaser.Point} [out] - A Phaser.Point object into which the result will be populated. If not given a new Point object is created.
* @return {Phaser.Point} A Phaser.Point object with the x and y values set to the center of the line segment.
*/
midPoint: function (out) {
if (out === undefined) { out = new Phaser.Point(); }
out.x = (this.start.x + this.end.x) / 2;
out.y = (this.start.y + this.end.y) / 2;
return out;
},
/**
* Centers this Line on the given coordinates.
*
* The line is centered by positioning the start and end points so that the lines midpoint matches
* the coordinates given.
*
* @method Phaser.Line#centerOn
* @param {number} x - The x position to center the line on.
* @param {number} y - The y position to center the line on.
* @return {Phaser.Line} This line object
*/
centerOn: function (x, y) {
var cx = (this.start.x + this.end.x) / 2;
var cy = (this.start.y + this.end.y) / 2;
var tx = x - cx;
var ty = y - cy;
this.start.add(tx, ty);
this.end.add(tx, ty);
},
/**
* 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 <= xMax) && (y >= yMin && y <= yMax));
},
/**
* Picks a random point from anywhere on the Line segment and returns it.
*
* @method Phaser.Line#random
* @param {Phaser.Point|object} [out] - A Phaser.Point, or any object with public x/y properties, that the values will be set in.
* If no object is provided a new Phaser.Point object will be created. In high performance areas avoid this by re-using an object.
* @return {Phaser.Point} An object containing the random point in its `x` and `y` properties.
*/
random: function (out) {
if (out === undefined) { out = new Phaser.Point(); }
var t = Math.random();
out.x = this.start.x + t * (this.end.x - this.start.x);
out.y = this.start.y + t * (this.end.y - this.start.y);
return out;
},
/**
* 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