mirror of
https://github.com/photonstorm/phaser
synced 2024-12-24 12:03:36 +00:00
1000 lines
25 KiB
HTML
1000 lines
25 KiB
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>
|
|
<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>
|
|
<a href="Phaser.Animation.html">Animation</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.AnimationManager.html">AnimationManager</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.AnimationParser.html">AnimationParser</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.BitmapData.html">BitmapData</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.BitmapText.html">BitmapText</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Button.html">Button</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Cache.html">Cache</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Camera.html">Camera</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Canvas.html">Canvas</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Circle.html">Circle</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Color.html">Color</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Device.html">Device</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Easing.html">Easing</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Easing.Back.html">Back</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Easing.Bounce.html">Bounce</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Easing.Circular.html">Circular</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Easing.Cubic.html">Cubic</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Easing.Elastic.html">Elastic</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Easing.Exponential.html">Exponential</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Easing.Linear.html">Linear</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Easing.Quadratic.html">Quadratic</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Easing.Quartic.html">Quartic</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Easing.Quintic.html">Quintic</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Easing.Sinusoidal.html">Sinusoidal</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Ellipse.html">Ellipse</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Events.html">Events</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Filter.html">Filter</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Frame.html">Frame</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.FrameData.html">FrameData</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Game.html">Game</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.GameObjectCreator.html">GameObjectCreator</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.GameObjectFactory.html">GameObjectFactory</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Gamepad.html">Gamepad</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.GamepadButton.html">GamepadButton</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Graphics.html">Graphics</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Group.html">Group</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Image.html">Image</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Input.html">Input</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.InputHandler.html">InputHandler</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Key.html">Key</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Keyboard.html">Keyboard</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Line.html">Line</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.LinkedList.html">LinkedList</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Loader.html">Loader</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.LoaderParser.html">LoaderParser</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Math.html">Math</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Mouse.html">Mouse</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.MSPointer.html">MSPointer</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Net.html">Net</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Particles.html">Particles</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Particles.Arcade.Emitter.html">Emitter</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.html">Physics</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.Arcade.html">Arcade</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.Arcade.Body.html">Body</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.Ninja.html">Ninja</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.Ninja.AABB.html">AABB</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.Ninja.Body.html">Body</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.Ninja.Circle.html">Circle</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.Ninja.Tile.html">Tile</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.P2.html">P2</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.P2.Body.html">Body</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.P2.BodyDebug.html">BodyDebug</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.P2.CollisionGroup.html">CollisionGroup</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.P2.ContactMaterial.html">ContactMaterial</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.P2.DistanceConstraint.html">DistanceConstraint</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.P2.GearConstraint.html">GearConstraint</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.P2.InversePointProxy.html">InversePointProxy</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.P2.LockConstraint.html">LockConstraint</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.P2.Material.html">Material</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.P2.PointProxy.html">PointProxy</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.P2.PrismaticConstraint.html">PrismaticConstraint</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.P2.RevoluteConstraint.html">RevoluteConstraint</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Physics.P2.Spring.html">Spring</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Plugin.html">Plugin</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.PluginManager.html">PluginManager</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Point.html">Point</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Pointer.html">Pointer</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Polygon.html">Polygon</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.QuadTree.html">QuadTree</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.RandomDataGenerator.html">RandomDataGenerator</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Rectangle.html">Rectangle</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.RenderTexture.html">RenderTexture</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.RequestAnimationFrame.html">RequestAnimationFrame</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.RetroFont.html">RetroFont</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.ScaleManager.html">ScaleManager</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Signal.html">Signal</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.SinglePad.html">SinglePad</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Sound.html">Sound</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.SoundManager.html">SoundManager</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Sprite.html">Sprite</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.SpriteBatch.html">SpriteBatch</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Stage.html">Stage</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.State.html">State</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.StateManager.html">StateManager</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Text.html">Text</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Tile.html">Tile</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Tilemap.html">Tilemap</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.TilemapLayer.html">TilemapLayer</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.TilemapParser.html">TilemapParser</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Tileset.html">Tileset</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.TileSprite.html">TileSprite</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Time.html">Time</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Timer.html">Timer</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.TimerEvent.html">TimerEvent</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Touch.html">Touch</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Tween.html">Tween</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.TweenManager.html">TweenManager</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Utils.html">Utils</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.Utils.Debug.html">Debug</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="Phaser.World.html">World</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="SignalBinding.html">SignalBinding</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 <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=true] - If true it will use startSprite.center.x, if false startSprite.x.
|
|
* @return {Phaser.Line} This line object
|
|
*/
|
|
fromSprite: function (startSprite, endSprite, useCenter) {
|
|
|
|
if (typeof useCenter === 'undefined') { useCenter = true; }
|
|
|
|
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.end.y) === (this.end.x - this.start.x) * (y - this.end.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));
|
|
|
|
},
|
|
|
|
/**
|
|
* 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 < x2) ? 1 : -1;
|
|
var sy = (y1 < y2) ? 1 : -1;
|
|
var err = dx - dy;
|
|
|
|
results.push([x1, y1]);
|
|
|
|
var i = 1;
|
|
|
|
while (!((x1 == x2) && (y1 == y2)))
|
|
{
|
|
var e2 = err << 1;
|
|
|
|
if (e2 > -dy)
|
|
{
|
|
err -= dy;
|
|
x1 += sx;
|
|
}
|
|
|
|
if (e2 < dx)
|
|
{
|
|
err += dx;
|
|
y1 += sy;
|
|
}
|
|
|
|
if (i % stepRate === 0)
|
|
{
|
|
results.push([x1, y1]);
|
|
}
|
|
|
|
i++;
|
|
|
|
}
|
|
|
|
return results;
|
|
|
|
}
|
|
|
|
};
|
|
|
|
/**
|
|
* @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.x - this.start.x, this.end.y - this.start.y);
|
|
}
|
|
|
|
});
|
|
|
|
/**
|
|
* @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)
|
|
{
|
|
if (Math.pow((result.x - b.x) + (result.y - b.y), 2) > Math.pow((a.x - b.x) + (a.y - b.y), 2))
|
|
{
|
|
return null;
|
|
}
|
|
|
|
if (Math.pow((result.x - a.x) + (result.y - a.y), 2) > Math.pow((a.x - b.x) + (a.y - b.y), 2))
|
|
{
|
|
return null;
|
|
}
|
|
|
|
if (Math.pow((result.x - f.x) + (result.y - f.y), 2) > Math.pow((e.x - f.x) + (e.y - f.y), 2))
|
|
{
|
|
return null;
|
|
}
|
|
|
|
if (Math.pow((result.x - e.x) + (result.y - e.y), 2) > Math.pow((e.x - f.x) + (e.y - f.y), 2))
|
|
{
|
|
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 Fri Mar 14 2014 06:34:17 GMT-0000 (GMT) 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>
|