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  74. 							<a href="Phaser.Camera.html">Camera</a>
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  82. 							<a href="Phaser.Circle.html">Circle</a>
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  86. 							<a href="Phaser.Color.html">Color</a>
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  94. 							<a href="Phaser.Easing.html">Easing</a>
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  98. 							<a href="Phaser.Easing.Back.html">Back</a>
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  106. 							<a href="Phaser.Easing.Circular.html">Circular</a>
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  110. 							<a href="Phaser.Easing.Cubic.html">Cubic</a>
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  114. 							<a href="Phaser.Easing.Elastic.html">Elastic</a>
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  118. 							<a href="Phaser.Easing.Exponential.html">Exponential</a>
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  120. 						
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  122. 							<a href="Phaser.Easing.Linear.html">Linear</a>
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  126. 							<a href="Phaser.Easing.Quadratic.html">Quadratic</a>
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  130. 							<a href="Phaser.Easing.Quartic.html">Quartic</a>
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  134. 							<a href="Phaser.Easing.Quintic.html">Quintic</a>
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  137. 						<li class="class-depth-2">
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  138. 							<a href="Phaser.Easing.Sinusoidal.html">Sinusoidal</a>
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  141. 						<li class="class-depth-1">
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  142. 							<a href="Phaser.Ellipse.html">Ellipse</a>
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  146. 							<a href="Phaser.Events.html">Events</a>
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  154. 							<a href="Phaser.Frame.html">Frame</a>
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  158. 							<a href="Phaser.FrameData.html">FrameData</a>
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  162. 							<a href="Phaser.Game.html">Game</a>
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  166. 							<a href="Phaser.GameObjectCreator.html">GameObjectCreator</a>
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  170. 							<a href="Phaser.GameObjectFactory.html">GameObjectFactory</a>
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  174. 							<a href="Phaser.Gamepad.html">Gamepad</a>
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  178. 							<a href="Phaser.GamepadButton.html">GamepadButton</a>
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  182. 							<a href="Phaser.Graphics.html">Graphics</a>
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  186. 							<a href="Phaser.Group.html">Group</a>
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  188. 						
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  189. 						<li class="class-depth-1">
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  190. 							<a href="Phaser.Image.html">Image</a>
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  192. 						
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  193. 						<li class="class-depth-1">
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  194. 							<a href="Phaser.Input.html">Input</a>
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  195. 						</li>
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  196. 						
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  198. 							<a href="Phaser.InputHandler.html">InputHandler</a>
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  202. 							<a href="Phaser.Key.html">Key</a>
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  206. 							<a href="Phaser.Keyboard.html">Keyboard</a>
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  208. 						
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  209. 						<li class="class-depth-1">
    210. 

  210. 							<a href="Phaser.Line.html">Line</a>
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  212. 						
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  214. 							<a href="Phaser.LinkedList.html">LinkedList</a>
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  230. 							<a href="Phaser.Mouse.html">Mouse</a>
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  238. 							<a href="Phaser.Net.html">Net</a>
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  240. 						
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  241. 						<li class="class-depth-1">
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  242. 							<a href="Phaser.Particle.html">Particle</a>
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  245. 						<li class="class-depth-1">
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  246. 							<a href="Phaser.Particles.html">Particles</a>
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  250. 							<a href="Phaser.Particles.Arcade.Emitter.html">Emitter</a>
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  253. 						<li class="class-depth-1">
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  254. 							<a href="Phaser.Physics.html">Physics</a>
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  257. 						<li class="class-depth-2">
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  258. 							<a href="Phaser.Physics.Arcade.html">Arcade</a>
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  260. 						
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  262. 							<a href="Phaser.Physics.Arcade.Body.html">Body</a>
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  264. 						
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  266. 							<a href="Phaser.Physics.Ninja.html">Ninja</a>
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  268. 						
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  270. 							<a href="Phaser.Physics.Ninja.AABB.html">AABB</a>
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  272. 						
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  273. 						<li class="class-depth-3">
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  274. 							<a href="Phaser.Physics.Ninja.Body.html">Body</a>
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  276. 						
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  277. 						<li class="class-depth-3">
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  278. 							<a href="Phaser.Physics.Ninja.Circle.html">Circle</a>
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    280. 

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  282. 							<a href="Phaser.Physics.Ninja.Tile.html">Tile</a>
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  284. 						
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  285. 						<li class="class-depth-2">
    286. 

  286. 							<a href="Phaser.Physics.P2.html">P2</a>
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    288. 

  288. 						
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  289. 						<li class="class-depth-3">
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  290. 							<a href="Phaser.Physics.P2.Body.html">Body</a>
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  292. 						
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  293. 						<li class="class-depth-3">
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  294. 							<a href="Phaser.Physics.P2.BodyDebug.html">BodyDebug</a>
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  296. 						
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  297. 						<li class="class-depth-3">
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  298. 							<a href="Phaser.Physics.P2.CollisionGroup.html">CollisionGroup</a>
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  301. 						<li class="class-depth-3">
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  302. 							<a href="Phaser.Physics.P2.ContactMaterial.html">ContactMaterial</a>
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    304. 

  304. 						
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  305. 						<li class="class-depth-3">
    306. 

  306. 							<a href="Phaser.Physics.P2.DistanceConstraint.html">DistanceConstraint</a>
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    308. 

  308. 						
    309. 

  309. 						<li class="class-depth-3">
    310. 

  310. 							<a href="Phaser.Physics.P2.FixtureList.html">FixtureList</a>
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  312. 						
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    314. 

  314. 							<a href="Phaser.Physics.P2.GearConstraint.html">GearConstraint</a>
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    316. 

  316. 						
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  317. 						<li class="class-depth-3">
    318. 

  318. 							<a href="Phaser.Physics.P2.InversePointProxy.html">InversePointProxy</a>
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    320. 

  320. 						
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  321. 						<li class="class-depth-3">
    322. 

  322. 							<a href="Phaser.Physics.P2.LockConstraint.html">LockConstraint</a>
    323. 

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    324. 

  324. 						
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  325. 						<li class="class-depth-3">
    326. 

  326. 							<a href="Phaser.Physics.P2.Material.html">Material</a>
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    328. 

  328. 						
    329. 

  329. 						<li class="class-depth-3">
    330. 

  330. 							<a href="Phaser.Physics.P2.PointProxy.html">PointProxy</a>
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    332. 

  332. 						
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  333. 						<li class="class-depth-3">
    334. 

  334. 							<a href="Phaser.Physics.P2.PrismaticConstraint.html">PrismaticConstraint</a>
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    336. 

  336. 						
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  337. 						<li class="class-depth-3">
    338. 

  338. 							<a href="Phaser.Physics.P2.RevoluteConstraint.html">RevoluteConstraint</a>
    339. 

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    340. 

  340. 						
    341. 

  341. 						<li class="class-depth-3">
    342. 

  342. 							<a href="Phaser.Physics.P2.Spring.html">Spring</a>
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  343. 						</li>
    344. 

  344. 						
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  345. 						<li class="class-depth-1">
    346. 

  346. 							<a href="Phaser.Plugin.html">Plugin</a>
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    348. 

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  349. 						<li class="class-depth-1">
    350. 

  350. 							<a href="Phaser.PluginManager.html">PluginManager</a>
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    354. 

  354. 							<a href="Phaser.Point.html">Point</a>
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  355. 						</li>
    356. 

  356. 						
    357. 

  357. 						<li class="class-depth-1">
    358. 

  358. 							<a href="Phaser.Pointer.html">Pointer</a>
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  359. 						</li>
    360. 

  360. 						
    361. 

  361. 						<li class="class-depth-1">
    362. 

  362. 							<a href="Phaser.Polygon.html">Polygon</a>
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  363. 						</li>
    364. 

  364. 						
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  365. 						<li class="class-depth-1">
    366. 

  366. 							<a href="Phaser.QuadTree.html">QuadTree</a>
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  367. 						</li>
    368. 

  368. 						
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  370. 							<a href="Phaser.RandomDataGenerator.html">RandomDataGenerator</a>
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  374. 							<a href="Phaser.Rectangle.html">Rectangle</a>
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  378. 							<a href="Phaser.RenderTexture.html">RenderTexture</a>
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  382. 							<a href="Phaser.RequestAnimationFrame.html">RequestAnimationFrame</a>
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  386. 							<a href="Phaser.RetroFont.html">RetroFont</a>
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  389. 						<li class="class-depth-1">
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  390. 							<a href="Phaser.ScaleManager.html">ScaleManager</a>
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  394. 							<a href="Phaser.Signal.html">Signal</a>
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  397. 						<li class="class-depth-1">
    398. 

  398. 							<a href="Phaser.SignalBinding.html">SignalBinding</a>
    399. 

  399. 						</li>
    400. 

  400. 						
    401. 

  401. 						<li class="class-depth-1">
    402. 

  402. 							<a href="Phaser.SinglePad.html">SinglePad</a>
    403. 

  403. 						</li>
    404. 

  404. 						
    405. 

  405. 						<li class="class-depth-1">
    406. 

  406. 							<a href="Phaser.Sound.html">Sound</a>
    407. 

  407. 						</li>
    408. 

  408. 						
    409. 

  409. 						<li class="class-depth-1">
    410. 

  410. 							<a href="Phaser.SoundManager.html">SoundManager</a>
    411. 

  411. 						</li>
    412. 

  412. 						
    413. 

  413. 						<li class="class-depth-1">
    414. 

  414. 							<a href="Phaser.Sprite.html">Sprite</a>
    415. 

  415. 						</li>
    416. 

  416. 						
    417. 

  417. 						<li class="class-depth-1">
    418. 

  418. 							<a href="Phaser.SpriteBatch.html">SpriteBatch</a>
    419. 

  419. 						</li>
    420. 

  420. 						
    421. 

  421. 						<li class="class-depth-1">
    422. 

  422. 							<a href="Phaser.Stage.html">Stage</a>
    423. 

  423. 						</li>
    424. 

  424. 						
    425. 

  425. 						<li class="class-depth-1">
    426. 

  426. 							<a href="Phaser.State.html">State</a>
    427. 

  427. 						</li>
    428. 

  428. 						
    429. 

  429. 						<li class="class-depth-1">
    430. 

  430. 							<a href="Phaser.StateManager.html">StateManager</a>
    431. 

  431. 						</li>
    432. 

  432. 						
    433. 

  433. 						<li class="class-depth-1">
    434. 

  434. 							<a href="Phaser.Text.html">Text</a>
    435. 

  435. 						</li>
    436. 

  436. 						
    437. 

  437. 						<li class="class-depth-1">
    438. 

  438. 							<a href="Phaser.Tile.html">Tile</a>
    439. 

  439. 						</li>
    440. 

  440. 						
    441. 

  441. 						<li class="class-depth-1">
    442. 

  442. 							<a href="Phaser.Tilemap.html">Tilemap</a>
    443. 

  443. 						</li>
    444. 

  444. 						
    445. 

  445. 						<li class="class-depth-1">
    446. 

  446. 							<a href="Phaser.TilemapLayer.html">TilemapLayer</a>
    447. 

  447. 						</li>
    448. 

  448. 						
    449. 

  449. 						<li class="class-depth-1">
    450. 

  450. 							<a href="Phaser.TilemapParser.html">TilemapParser</a>
    451. 

  451. 						</li>
    452. 

  452. 						
    453. 

  453. 						<li class="class-depth-1">
    454. 

  454. 							<a href="Phaser.Tileset.html">Tileset</a>
    455. 

  455. 						</li>
    456. 

  456. 						
    457. 

  457. 						<li class="class-depth-1">
    458. 

  458. 							<a href="Phaser.TileSprite.html">TileSprite</a>
    459. 

  459. 						</li>
    460. 

  460. 						
    461. 

  461. 						<li class="class-depth-1">
    462. 

  462. 							<a href="Phaser.Time.html">Time</a>
    463. 

  463. 						</li>
    464. 

  464. 						
    465. 

  465. 						<li class="class-depth-1">
    466. 

  466. 							<a href="Phaser.Timer.html">Timer</a>
    467. 

  467. 						</li>
    468. 

  468. 						
    469. 

  469. 						<li class="class-depth-1">
    470. 

  470. 							<a href="Phaser.TimerEvent.html">TimerEvent</a>
    471. 

  471. 						</li>
    472. 

  472. 						
    473. 

  473. 						<li class="class-depth-1">
    474. 

  474. 							<a href="Phaser.Touch.html">Touch</a>
    475. 

  475. 						</li>
    476. 

  476. 						
    477. 

  477. 						<li class="class-depth-1">
    478. 

  478. 							<a href="Phaser.Tween.html">Tween</a>
    479. 

  479. 						</li>
    480. 

  480. 						
    481. 

  481. 						<li class="class-depth-1">
    482. 

  482. 							<a href="Phaser.TweenManager.html">TweenManager</a>
    483. 

  483. 						</li>
    484. 

  484. 						
    485. 

  485. 						<li class="class-depth-1">
    486. 

  486. 							<a href="Phaser.Utils.html">Utils</a>
    487. 

  487. 						</li>
    488. 

  488. 						
    489. 

  489. 						<li class="class-depth-2">
    490. 

  490. 							<a href="Phaser.Utils.Debug.html">Debug</a>
    491. 

  491. 						</li>
    492. 

  492. 						
    493. 

  493. 						<li class="class-depth-1">
    494. 

  494. 							<a href="Phaser.World.html">World</a>
    495. 

  495. 						</li>
    496. 

  496. 						
    497. 

  497. 

  498. 					</ul>
    499. 

  499. 				</li>
    500. 

  500. 				
    501. 

  501. 			</ul>
    502. 

  502. 		</div>
    503. 

  503. 	</div>
    504. 

  504. 

  505. 	<div class="row-fluid">
    506. 

  506. 

  507. 		
    508. 

  508. 			<div class="span12">
    509. 

  509. 				
    510. 

  510. 				<div id="main">
    511. 

  511. 					
    512. 

  512. 

  513. 

  514. 		<h1 class="page-title">Source: geom/Line.js</h1>
    515. 

  515.     
    516. 

  516.     <section>
    517. 

  517.         <article>
    518. 

  518.             <pre class="sunlight-highlight-javascript linenums">/**
    519. 

  519. * @author       Richard Davey &lt;rich@photonstorm.com>
    520. 

  520. * @copyright    2014 Photon Storm Ltd.
    521. 

  521. * @license      {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
    522. 

  522. */
    523. 

  523. 

  524. /**
    525. 

  525. * Creates a new Line object with a start and an end point.
    526. 

  526. * @class Line
    527. 

  527. * @classdesc Phaser - Line
    528. 

  528. * @constructor
    529. 

  529. * @param {number} [x1=0] - The x coordinate of the start of the line.
    530. 

  530. * @param {number} [y1=0] - The y coordinate of the start of the line.
    531. 

  531. * @param {number} [x2=0] - The x coordinate of the end of the line.
    532. 

  532. * @param {number} [y2=0] - The y coordinate of the end of the line.
    533. 

  533. * @return {Phaser.Line} This line object
    534. 

  534. */
    535. 

  535. Phaser.Line = function (x1, y1, x2, y2) {
    536. 

  536. 

  537.     x1 = x1 || 0;
    538. 

  538.     y1 = y1 || 0;
    539. 

  539.     x2 = x2 || 0;
    540. 

  540.     y2 = y2 || 0;
    541. 

  541. 

  542.     /**
    543. 

  543.     * @property {Phaser.Point} start - The start point of the line.
    544. 

  544.     */
    545. 

  545.     this.start = new Phaser.Point(x1, y1);
    546. 

  546. 

  547.     /**
    548. 

  548.     * @property {Phaser.Point} end - The end point of the line.
    549. 

  549.     */
    550. 

  550.     this.end = new Phaser.Point(x2, y2);
    551. 

  551. 

  552. };
    553. 

  553. 

  554. Phaser.Line.prototype = {
    555. 

  555. 

  556.     /**
    557. 

  557.     * Sets the components of the Line to the specified values.
    558. 

  558.     * @method Phaser.Line#setTo
    559. 

  559.     * @param {number} [x1=0] - The x coordinate of the start of the line.
    560. 

  560.     * @param {number} [y1=0] - The y coordinate of the start of the line.
    561. 

  561.     * @param {number} [x2=0] - The x coordinate of the end of the line.
    562. 

  562.     * @param {number} [y2=0] - The y coordinate of the end of the line.
    563. 

  563.     * @return {Phaser.Line} This line object
    564. 

  564.     */
    565. 

  565.     setTo: function (x1, y1, x2, y2) {
    566. 

  566. 

  567.         this.start.setTo(x1, y1);
    568. 

  568.         this.end.setTo(x2, y2);
    569. 

  569. 

  570.         return this;
    571. 

  571. 

  572.     },
    573. 

  573. 

  574.     /**
    575. 

  575.     * Sets the line to match the x/y coordinates of the two given sprites.
    576. 

  576.     * Can optionally be calculated from their center coordinates.
    577. 

  577.     * @method Phaser.Line#fromSprite
    578. 

  578.     * @param {Phaser.Sprite} startSprite - The coordinates of this Sprite will be set to the Line.start point.
    579. 

  579.     * @param {Phaser.Sprite} endSprite - The coordinates of this Sprite will be set to the Line.start point.
    580. 

  580.     * @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.
    581. 

  581.     * @return {Phaser.Line} This line object
    582. 

  582.     */
    583. 

  583.     fromSprite: function (startSprite, endSprite, useCenter) {
    584. 

  584. 

  585.         if (typeof useCenter === 'undefined') { useCenter = false; }
    586. 

  586. 

  587.         if (useCenter)
    588. 

  588.         {
    589. 

  589.             return this.setTo(startSprite.center.x, startSprite.center.y, endSprite.center.x, endSprite.center.y);
    590. 

  590.         }
    591. 

  591.         else
    592. 

  592.         {
    593. 

  593.             return this.setTo(startSprite.x, startSprite.y, endSprite.x, endSprite.y);
    594. 

  594.         }
    595. 

  595. 

  596.     },
    597. 

  597. 

  598.     /**
    599. 

  599.     * Checks for intersection between this line and another Line.
    600. 

  600.     * If asSegment is true it will check for segment intersection. If asSegment is false it will check for line intersection.
    601. 

  601.     * Returns the intersection segment of AB and EF as a Point, or null if there is no intersection.
    602. 

  602.     *
    603. 

  603.     * @method Phaser.Line#intersects
    604. 

  604.     * @param {Phaser.Line} line - The line to check against this one.
    605. 

  605.     * @param {boolean} [asSegment=true] - If true it will check for segment intersection, otherwise full line intersection.
    606. 

  606.     * @param {Phaser.Point} [result] - A Point object to store the result in, if not given a new one will be created.
    607. 

  607.     * @return {Phaser.Point} The intersection segment of the two lines as a Point, or null if there is no intersection.
    608. 

  608.     */
    609. 

  609.     intersects: function (line, asSegment, result) {
    610. 

  610. 

  611.         return Phaser.Line.intersectsPoints(this.start, this.end, line.start, line.end, asSegment, result);
    612. 

  612. 

  613.     },
    614. 

  614. 

  615.     /**
    616. 

  616.     * Tests if the given coordinates fall on this line. See pointOnSegment to test against just the line segment.
    617. 

  617.     * @method Phaser.Line#pointOnLine
    618. 

  618.     * @param {number} x - The line to check against this one.
    619. 

  619.     * @param {number} y - The line to check against this one.
    620. 

  620.     * @return {boolean} True if the point is on the line, false if not.
    621. 

  621.     */
    622. 

  622.     pointOnLine: function (x, y) {
    623. 

  623. 

  624.         return ((x - this.start.x) * (this.end.y - this.end.y) === (this.end.x - this.start.x) * (y - this.end.y));
    625. 

  625. 

  626.     },
    627. 

  627. 

  628.     /**
    629. 

  629.     * Tests if the given coordinates fall on this line and within the segment. See pointOnLine to test against just the line.
    630. 

  630.     * @method Phaser.Line#pointOnSegment
    631. 

  631.     * @param {number} x - The line to check against this one.
    632. 

  632.     * @param {number} y - The line to check against this one.
    633. 

  633.     * @return {boolean} True if the point is on the line and segment, false if not.
    634. 

  634.     */
    635. 

  635.     pointOnSegment: function (x, y) {
    636. 

  636. 

  637.         var xMin = Math.min(this.start.x, this.end.x);
    638. 

  638.         var xMax = Math.max(this.start.x, this.end.x);
    639. 

  639.         var yMin = Math.min(this.start.y, this.end.y);
    640. 

  640.         var yMax = Math.max(this.start.y, this.end.y);
    641. 

  641. 

  642.         return (this.pointOnLine(x, y) && (x >= xMin && x &lt;= xMax) && (y >= yMin && y &lt;= yMax));
    643. 

  643. 

  644.     },
    645. 

  645. 

  646.     /**
    647. 

  647.     * Using Bresenham's line algorithm this will return an array of all coordinates on this line.
    648. 

  648.     * The start and end points are rounded before this runs as the algorithm works on integers.
    649. 

  649.     *
    650. 

  650.     * @method Phaser.Line#coordinatesOnLine
    651. 

  651.     * @param {number} [stepRate=1] - How many steps will we return? 1 = every coordinate on the line, 2 = every other coordinate, etc.
    652. 

  652.     * @param {array} [results] - The array to store the results in. If not provided a new one will be generated.
    653. 

  653.     * @return {array} An array of coordinates.
    654. 

  654.     */
    655. 

  655.     coordinatesOnLine: function (stepRate, results) {
    656. 

  656. 

  657.         if (typeof stepRate === 'undefined') { stepRate = 1; }
    658. 

  658.         if (typeof results === 'undefined') { results = []; }
    659. 

  659. 

  660.         var x1 = Math.round(this.start.x);
    661. 

  661.         var y1 = Math.round(this.start.y);
    662. 

  662.         var x2 = Math.round(this.end.x);
    663. 

  663.         var y2 = Math.round(this.end.y);
    664. 

  664. 

  665.         var dx = Math.abs(x2 - x1);
    666. 

  666.         var dy = Math.abs(y2 - y1);
    667. 

  667.         var sx = (x1 &lt; x2) ? 1 : -1;
    668. 

  668.         var sy = (y1 &lt; y2) ? 1 : -1;
    669. 

  669.         var err = dx - dy;
    670. 

  670. 

  671.         results.push([x1, y1]);
    672. 

  672. 

  673.         var i = 1;
    674. 

  674. 

  675.         while (!((x1 == x2) && (y1 == y2)))
    676. 

  676.         {
    677. 

  677.             var e2 = err &lt;&lt; 1;
    678. 

  678. 

  679.             if (e2 > -dy)
    680. 

  680.             {
    681. 

  681.                 err -= dy;
    682. 

  682.                 x1 += sx;
    683. 

  683.             }
    684. 

  684. 

  685.             if (e2 &lt; dx)
    686. 

  686.             {
    687. 

  687.                 err += dx;
    688. 

  688.                 y1 += sy;
    689. 

  689.             }
    690. 

  690. 

  691.             if (i % stepRate === 0)
    692. 

  692.             {
    693. 

  693.                 results.push([x1, y1]);
    694. 

  694.             }
    695. 

  695. 

  696.             i++;
    697. 

  697. 

  698.         }
    699. 

  699. 

  700.         return results;
    701. 

  701. 

  702.     }
    703. 

  703. 

  704. };
    705. 

  705. 

  706. /**
    707. 

  707. * @name Phaser.Line#length
    708. 

  708. * @property {number} length - Gets the length of the line segment.
    709. 

  709. * @readonly
    710. 

  710. */
    711. 

  711. Object.defineProperty(Phaser.Line.prototype, "length", {
    712. 

  712. 

  713.     get: function () {
    714. 

  714.         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));
    715. 

  715.     }
    716. 

  716. 

  717. });
    718. 

  718. 

  719. /**
    720. 

  720. * @name Phaser.Line#angle
    721. 

  721. * @property {number} angle - Gets the angle of the line.
    722. 

  722. * @readonly
    723. 

  723. */
    724. 

  724. Object.defineProperty(Phaser.Line.prototype, "angle", {
    725. 

  725. 

  726.     get: function () {
    727. 

  727.         return Math.atan2(this.end.x - this.start.x, this.end.y - this.start.y);
    728. 

  728.     }
    729. 

  729. 

  730. });
    731. 

  731. 

  732. /**
    733. 

  733. * @name Phaser.Line#slope
    734. 

  734. * @property {number} slope - Gets the slope of the line (y/x).
    735. 

  735. * @readonly
    736. 

  736. */
    737. 

  737. Object.defineProperty(Phaser.Line.prototype, "slope", {
    738. 

  738. 

  739.     get: function () {
    740. 

  740.         return (this.end.y - this.start.y) / (this.end.x - this.start.x);
    741. 

  741.     }
    742. 

  742. 

  743. });
    744. 

  744. 

  745. /**
    746. 

  746. * @name Phaser.Line#perpSlope
    747. 

  747. * @property {number} perpSlope - Gets the perpendicular slope of the line (x/y).
    748. 

  748. * @readonly
    749. 

  749. */
    750. 

  750. Object.defineProperty(Phaser.Line.prototype, "perpSlope", {
    751. 

  751. 

  752.     get: function () {
    753. 

  753.         return -((this.end.x - this.start.x) / (this.end.y - this.start.y));
    754. 

  754.     }
    755. 

  755. 

  756. });
    757. 

  757. 

  758. /**
    759. 

  759. * @name Phaser.Line#x
    760. 

  760. * @property {number} x - Gets the x coordinate of the top left of the bounds around this line.
    761. 

  761. * @readonly
    762. 

  762. */
    763. 

  763. Object.defineProperty(Phaser.Line.prototype, "x", {
    764. 

  764. 

  765.     get: function () {
    766. 

  766.         return Math.min(this.start.x, this.end.x);
    767. 

  767.     }
    768. 

  768. 

  769. });
    770. 

  770. 

  771. /**
    772. 

  772. * @name Phaser.Line#y
    773. 

  773. * @property {number} y - Gets the y coordinate of the top left of the bounds around this line.
    774. 

  774. * @readonly
    775. 

  775. */
    776. 

  776. Object.defineProperty(Phaser.Line.prototype, "y", {
    777. 

  777. 

  778.     get: function () {
    779. 

  779.         return Math.min(this.start.y, this.end.y);
    780. 

  780.     }
    781. 

  781. 

  782. });
    783. 

  783. 

  784. /**
    785. 

  785. * @name Phaser.Line#left
    786. 

  786. * @property {number} left - Gets the left-most point of this line.
    787. 

  787. * @readonly
    788. 

  788. */
    789. 

  789. Object.defineProperty(Phaser.Line.prototype, "left", {
    790. 

  790. 

  791.     get: function () {
    792. 

  792.         return Math.min(this.start.x, this.end.x);
    793. 

  793.     }
    794. 

  794. 

  795. });
    796. 

  796. 

  797. /**
    798. 

  798. * @name Phaser.Line#right
    799. 

  799. * @property {number} right - Gets the right-most point of this line.
    800. 

  800. * @readonly
    801. 

  801. */
    802. 

  802. Object.defineProperty(Phaser.Line.prototype, "right", {
    803. 

  803. 

  804.     get: function () {
    805. 

  805.         return Math.max(this.start.x, this.end.x);
    806. 

  806.     }
    807. 

  807. 

  808. });
    809. 

  809. 

  810. /**
    811. 

  811. * @name Phaser.Line#top
    812. 

  812. * @property {number} top - Gets the top-most point of this line.
    813. 

  813. * @readonly
    814. 

  814. */
    815. 

  815. Object.defineProperty(Phaser.Line.prototype, "top", {
    816. 

  816. 

  817.     get: function () {
    818. 

  818.         return Math.min(this.start.y, this.end.y);
    819. 

  819.     }
    820. 

  820. 

  821. });
    822. 

  822. 

  823. /**
    824. 

  824. * @name Phaser.Line#bottom
    825. 

  825. * @property {number} bottom - Gets the bottom-most point of this line.
    826. 

  826. * @readonly
    827. 

  827. */
    828. 

  828. Object.defineProperty(Phaser.Line.prototype, "bottom", {
    829. 

  829. 

  830.     get: function () {
    831. 

  831.         return Math.max(this.start.y, this.end.y);
    832. 

  832.     }
    833. 

  833. 

  834. });
    835. 

  835. 

  836. /**
    837. 

  837. * @name Phaser.Line#width
    838. 

  838. * @property {number} width - Gets the width of this bounds of this line.
    839. 

  839. * @readonly
    840. 

  840. */
    841. 

  841. Object.defineProperty(Phaser.Line.prototype, "width", {
    842. 

  842. 

  843.     get: function () {
    844. 

  844.         return Math.abs(this.start.x - this.end.x);
    845. 

  845.     }
    846. 

  846. 

  847. });
    848. 

  848. 

  849. /**
    850. 

  850. * @name Phaser.Line#height
    851. 

  851. * @property {number} height - Gets the height of this bounds of this line.
    852. 

  852. * @readonly
    853. 

  853. */
    854. 

  854. Object.defineProperty(Phaser.Line.prototype, "height", {
    855. 

  855. 

  856.     get: function () {
    857. 

  857.         return Math.abs(this.start.y - this.end.y);
    858. 

  858.     }
    859. 

  859. 

  860. });
    861. 

  861. 

  862. /**
    863. 

  863. * Checks for intersection between two lines as defined by the given start and end points.
    864. 

  864. * If asSegment is true it will check for line segment intersection. If asSegment is false it will check for line intersection.
    865. 

  865. * Returns the intersection segment of AB and EF as a Point, or null if there is no intersection.
    866. 

  866. * Adapted from code by Keith Hair
    867. 

  867. *
    868. 

  868. * @method Phaser.Line.intersectsPoints
    869. 

  869. * @param {Phaser.Point} a - The start of the first Line to be checked.
    870. 

  870. * @param {Phaser.Point} b - The end of the first line to be checked.
    871. 

  871. * @param {Phaser.Point} e - The start of the second Line to be checked.
    872. 

  872. * @param {Phaser.Point} f - The end of the second line to be checked.
    873. 

  873. * @param {boolean} [asSegment=true] - If true it will check for segment intersection, otherwise full line intersection.
    874. 

  874. * @param {Phaser.Point} [result] - A Point object to store the result in, if not given a new one will be created.
    875. 

  875. * @return {Phaser.Point} The intersection segment of the two lines as a Point, or null if there is no intersection.
    876. 

  876. */
    877. 

  877. Phaser.Line.intersectsPoints = function (a, b, e, f, asSegment, result) {
    878. 

  878. 

  879.     if (typeof asSegment === 'undefined') { asSegment = true; }
    880. 

  880.     if (typeof result === 'undefined') { result = new Phaser.Point(); }
    881. 

  881. 

  882.     var a1 = b.y - a.y;
    883. 

  883.     var a2 = f.y - e.y;
    884. 

  884.     var b1 = a.x - b.x;
    885. 

  885.     var b2 = e.x - f.x;
    886. 

  886.     var c1 = (b.x * a.y) - (a.x * b.y);
    887. 

  887.     var c2 = (f.x * e.y) - (e.x * f.y);
    888. 

  888.     var denom = (a1 * b2) - (a2 * b1);
    889. 

  889. 

  890.     if (denom === 0)
    891. 

  891.     {
    892. 

  892.         return null;
    893. 

  893.     }
    894. 

  894. 

  895.     result.x = ((b1 * c2) - (b2 * c1)) / denom;
    896. 

  896.     result.y = ((a2 * c1) - (a1 * c2)) / denom;
    897. 

  897. 

  898.     if (asSegment)
    899. 

  899.     {
    900. 

  900.         if (Math.pow((result.x - b.x) + (result.y - b.y), 2) > Math.pow((a.x - b.x) + (a.y - b.y), 2))
    901. 

  901.         {
    902. 

  902.             return null;
    903. 

  903.         }
    904. 

  904. 

  905.         if (Math.pow((result.x - a.x) + (result.y - a.y), 2) > Math.pow((a.x - b.x) + (a.y - b.y), 2))
    906. 

  906.         {
    907. 

  907.             return null;
    908. 

  908.         }
    909. 

  909. 

  910.         if (Math.pow((result.x - f.x) + (result.y - f.y), 2) > Math.pow((e.x - f.x) + (e.y - f.y), 2))
    911. 

  911.         {
    912. 

  912.             return null;
    913. 

  913.         }
    914. 

  914. 

  915.         if (Math.pow((result.x - e.x) + (result.y - e.y), 2) > Math.pow((e.x - f.x) + (e.y - f.y), 2))
    916. 

  916.         {
    917. 

  917.             return null;
    918. 

  918.         }
    919. 

  919.     }
    920. 

  920. 

  921.     return result;
    922. 

  922. 

  923. };
    924. 

  924. 

  925. /**
    926. 

  926. * Checks for intersection between two lines.
    927. 

  927. * If asSegment is true it will check for segment intersection.
    928. 

  928. * If asSegment is false it will check for line intersection.
    929. 

  929. * Returns the intersection segment of AB and EF as a Point, or null if there is no intersection.
    930. 

  930. * Adapted from code by Keith Hair
    931. 

  931. *
    932. 

  932. * @method Phaser.Line.intersects
    933. 

  933. * @param {Phaser.Line} a - The first Line to be checked.
    934. 

  934. * @param {Phaser.Line} b - The second Line to be checked.
    935. 

  935. * @param {boolean} [asSegment=true] - If true it will check for segment intersection, otherwise full line intersection.
    936. 

  936. * @param {Phaser.Point} [result] - A Point object to store the result in, if not given a new one will be created.
    937. 

  937. * @return {Phaser.Point} The intersection segment of the two lines as a Point, or null if there is no intersection.
    938. 

  938. */
    939. 

  939. Phaser.Line.intersects = function (a, b, asSegment, result) {
    940. 

  940. 

  941.     return Phaser.Line.intersectsPoints(a.start, a.end, b.start, b.end, asSegment, result);
    942. 

  942. 

  943. };
    944. 

  944. </pre>
    945. 

  945.         </article>
    946. 

  946.     </section>
    947. 

  947. 

  948. 

  949. 

  950. 

  951. 

  952. 				</div>
    953. 

  953. 

  954. 				<div class="clearfix"></div>
    955. 

  955. 				<footer>
    956. 

  956. 					
    957. 

  957. 					
    958. 

  958. 		<span class="copyright">
    959. 

  959. 		Phaser Copyright © 2012-2014 Photon Storm Ltd.
    960. 

  960. 		</span>
    961. 

  961. 					<br />
    962. 

  962. 					
    963. 

  963. 		<span class="jsdoc-message">
    964. 

  964. 		Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.3.0-dev</a>
    965. 

  965. 		on Fri Apr 11 2014 13:25:03 GMT+0100 (BST) using the <a href="https://github.com/terryweiss/docstrap">DocStrap template</a>.
    966. 

  966. 		</span>
    967. 

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  972. 		</div>
    973. 

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    977. 

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    978. 

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    980. 

  980. 	<script src="scripts/jquery.min.js"></script>
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  981. 	<script src="scripts/jquery.scrollTo.js"></script>
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    988. 

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    990. 

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