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<title>Phaser Source: physics/Physics.js</title>
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<h1 class="page-title">Source: physics/Physics.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}
*/
/**
* The Physics Manager is responsible for looking after all of the running physics systems.
* Phaser supports 3 physics systems: Arcade Physics, P2 and Ninja Physics (with Box2D and Chipmunk in development)
* Game Objects can belong to only 1 physics system, but you can have multiple systems active in a single game.
*
* For example you could have P2 managing a polygon-built terrain landscape that an vehicle drives over, while it could be firing bullets that use the
* faster (due to being much simpler) Arcade Physics system.
*
* @class Phaser.Physics
* @constructor
* @param {Phaser.Game} game - A reference to the currently running game.
* @param {object} [physicsConfig=null] - A physics configuration object to pass to the Physics world on creation.
*/
Phaser.Physics = function (game, config) {
config = config || {};
/**
* @property {Phaser.Game} game - Local reference to game.
*/
this.game = game;
/**
* @property {object} config - The physics configuration object as passed to the game on creation.
*/
this.config = config;
/**
* @property {Phaser.Physics.Arcade} arcade - The Arcade Physics system.
*/
this.arcade = null;
/**
* @property {Phaser.Physics.P2} p2 - The P2.JS Physics system.
*/
this.p2 = null;
/**
* @property {Phaser.Physics.Ninja} ninja - The N+ Ninja Physics System.
*/
this.ninja = null;
/**
* @property {Phaser.Physics.Box2D} box2d - The Box2D Physics system (to be done).
*/
this.box2d = null;
/**
* @property {Phaser.Physics.Chipmunk} chipmunk - The Chipmunk Physics system (to be done).
*/
this.chipmunk = null;
this.parseConfig();
};
/**
* @const
* @type {number}
*/
Phaser.Physics.ARCADE = 0;
/**
* @const
* @type {number}
*/
Phaser.Physics.P2JS = 1;
/**
* @const
* @type {number}
*/
Phaser.Physics.NINJA = 2;
/**
* @const
* @type {number}
*/
Phaser.Physics.BOX2D = 3;
/**
* @const
* @type {number}
*/
Phaser.Physics.CHIPMUNK = 4;
Phaser.Physics.prototype = {
/**
* Parses the Physics Configuration object passed to the Game constructor and starts any physics systems specified within.
*
* @method Phaser.Physics#parseConfig
*/
parseConfig: function () {
if ((!this.config.hasOwnProperty('arcade') || this.config['arcade'] === true) && Phaser.Physics.hasOwnProperty('Arcade'))
{
// If Arcade isn't specified, we create it automatically if we can
this.arcade = new Phaser.Physics.Arcade(this.game);
this.game.time.deltaCap = 0.2;
}
if (this.config.hasOwnProperty('ninja') && this.config['ninja'] === true && Phaser.Physics.hasOwnProperty('Ninja'))
{
this.ninja = new Phaser.Physics.Ninja(this.game);
}
if (this.config.hasOwnProperty('p2') && this.config['p2'] === true && Phaser.Physics.hasOwnProperty('P2'))
{
this.p2 = new Phaser.Physics.P2(this.game, this.config);
}
if (this.config.hasOwnProperty('box2d') && this.config['box2d'] === true && Phaser.Physics.hasOwnProperty('BOX2D'))
{
this.box2d = new Phaser.Physics.BOX2D(this.game, this.config);
}
},
/**
* This will create an instance of the requested physics simulation.
* Phaser.Physics.Arcade is running by default, but all others need activating directly.
* You can start the following physics systems:
* Phaser.Physics.P2JS - A full-body advanced physics system by Stefan Hedman.
* Phaser.Physics.NINJA - A port of Metanet Softwares N+ physics system.
* Phaser.Physics.BOX2D and Phaser.Physics.CHIPMUNK are still in development.
*
* @method Phaser.Physics#startSystem
* @param {number} The physics system to start.
*/
startSystem: function (system) {
if (system === Phaser.Physics.ARCADE)
{
this.arcade = new Phaser.Physics.Arcade(this.game);
}
else if (system === Phaser.Physics.P2JS)
{
this.p2 = new Phaser.Physics.P2(this.game, this.config);
}
if (system === Phaser.Physics.NINJA)
{
this.ninja = new Phaser.Physics.Ninja(this.game);
}
else if (system === Phaser.Physics.BOX2D && this.box2d === null)
{
this.box2d = new Phaser.Physics.Box2D(this.game, this.config);
}
else if (system === Phaser.Physics.CHIPMUNK && this.chipmunk === null)
{
throw new Error('The Chipmunk physics system has not been implemented yet.');
}
},
/**
* This will create a default physics body on the given game object or array of objects.
* A game object can only have 1 physics body active at any one time, and it can't be changed until the object is destroyed.
* It can be for any of the physics systems that have been started:
*
* Phaser.Physics.Arcade - A light weight AABB based collision system with basic separation.
* Phaser.Physics.P2JS - A full-body advanced physics system supporting multiple object shapes, polygon loading, contact materials, springs and constraints.
* Phaser.Physics.NINJA - A port of Metanet Softwares N+ physics system. Advanced AABB and Circle vs. Tile collision.
* Phaser.Physics.BOX2D - A port of https://code.google.com/p/box2d-html5
* Phaser.Physics.CHIPMUNK is still in development.
*
* If you require more control over what type of body is created, for example to create a Ninja Physics Circle instead of the default AABB, then see the
* individual physics systems `enable` methods instead of using this generic one.
*
* @method Phaser.Physics#enable
* @param {object|array} object - The game object to create the physics body on. Can also be an array of objects, a body will be created on every object in the array.
* @param {number} [system=Phaser.Physics.ARCADE] - The physics system that will be used to create the body. Defaults to Arcade Physics.
* @param {boolean} [debug=false] - Enable the debug drawing for this body. Defaults to false.
*/
enable: function (object, system, debug) {
if (typeof system === 'undefined') { system = Phaser.Physics.ARCADE; }
if (typeof debug === 'undefined') { debug = false; }
if (system === Phaser.Physics.ARCADE)
{
this.arcade.enable(object);
}
else if (system === Phaser.Physics.P2JS && this.p2)
{
this.p2.enable(object, debug);
}
else if (system === Phaser.Physics.NINJA && this.ninja)
{
this.ninja.enableAABB(object);
}
else if (system === Phaser.Physics.BOX2D && this.box2d)
{
this.box2d.enable(object);
}
},
/**
* preUpdate checks.
*
* @method Phaser.Physics#preUpdate
* @protected
*/
preUpdate: function () {
// ArcadePhysics / Ninja don't have a core to preUpdate
if (this.p2)
{
this.p2.preUpdate();
}
if (this.box2d)
{
this.box2d.preUpdate();
}
},
/**
* Updates all running physics systems.
*
* @method Phaser.Physics#update
* @protected
*/
update: function () {
// ArcadePhysics / Ninja don't have a core to update
if (this.p2)
{
this.p2.update();
}
if (this.box2d)
{
this.box2d.update();
}
},
/**
* Updates the physics bounds to match the world dimensions.
*
* @method Phaser.Physics#setBoundsToWorld
* @protected
*/
setBoundsToWorld: function () {
if (this.arcade)
{
this.arcade.setBoundsToWorld();
}
if (this.ninja)
{
this.ninja.setBoundsToWorld();
}
if (this.p2)
{
this.p2.setBoundsToWorld();
}
if (this.box2d)
{
this.box2d.setBoundsToWorld();
}
},
/**
* Clears down all active physics systems. This doesn't destroy them, it just clears them of objects and is called when the State changes.
*
* @method Phaser.Physics#clear
* @protected
*/
clear: function () {
if (this.p2)
{
this.p2.clear();
}
if (this.box2d)
{
this.box2d.clear();
}
},
/**
* Destroys all active physics systems. Usually only called on a Game Shutdown, not on a State swap.
*
* @method Phaser.Physics#destroy
*/
destroy: function () {
if (this.p2)
{
this.p2.destroy();
}
if (this.box2d)
{
this.box2d.destroy();
}
this.arcade = null;
this.ninja = null;
this.p2 = null;
this.box2d = null;
}
};
Phaser.Physics.prototype.constructor = Phaser.Physics;
</pre>
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<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>