phaser/src/core/Game.js

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/**
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* @author Richard Davey <rich@photonstorm.com>
2014-02-05 05:54:25 +00:00
* @copyright 2014 Photon Storm Ltd.
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* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/
/**
* This is where the magic happens. The Game object is the heart of your game,
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* providing quick access to common functions and handling the boot process.
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* "Hell, there are no rules here - we're trying to accomplish something."
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* Thomas A. Edison
*
* @class Phaser.Game
* @constructor
* @param {number|string} [width=800] - The width of your game in game pixels. If given as a string the value must be between 0 and 100 and will be used as the percentage width of the parent container, or the browser window if no parent is given.
* @param {number|string} [height=600] - The height of your game in game pixels. If given as a string the value must be between 0 and 100 and will be used as the percentage height of the parent container, or the browser window if no parent is given.
* @param {number} [renderer=Phaser.AUTO] - Which renderer to use: Phaser.AUTO will auto-detect, Phaser.WEBGL, Phaser.CANVAS or Phaser.HEADLESS (no rendering at all).
* @param {string|HTMLElement} [parent=''] - The DOM element into which this games canvas will be injected. Either a DOM ID (string) or the element itself.
* @param {object} [state=null] - The default state object. A object consisting of Phaser.State functions (preload, create, update, render) or null.
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* @param {boolean} [transparent=false] - Use a transparent canvas background or not.
* @param {boolean} [antialias=true] - Draw all image textures anti-aliased or not. The default is for smooth textures, but disable if your game features pixel art.
* @param {object} [physicsConfig=null] - A physics configuration object to pass to the Physics world on creation.
*/
Phaser.Game = function (width, height, renderer, parent, state, transparent, antialias, physicsConfig) {
/**
* @property {number} id - Phaser Game ID (for when Pixi supports multiple instances).
*/
this.id = Phaser.GAMES.push(this) - 1;
/**
* @property {object} config - The Phaser.Game configuration object.
*/
this.config = null;
/**
* @property {object} physicsConfig - The Phaser.Physics.World configuration object.
*/
this.physicsConfig = physicsConfig;
/**
* @property {string|HTMLElement} parent - The Games DOM parent.
* @default
*/
this.parent = '';
/**
* The current Game Width in pixels.
*
* _Do not modify this property directly:_ use {@link Phaser.ScaleManager#setGameSize} - eg. `game.scale.setGameSize(width, height)` - instead.
*
* @property {integer} width
* @readonly
* @default
*/
this.width = 800;
/**
* The current Game Height in pixels.
*
* _Do not modify this property directly:_ use {@link Phaser.ScaleManager#setGameSize} - eg. `game.scale.setGameSize(width, height)` - instead.
*
* @property {integer} height
* @readonly
* @default
*/
this.height = 600;
A large refactor to how the internal game timers and physics calculations has been made. We've now swapped to using a fixed time step internally across Phaser, instead of the variable one we had before that caused glitchse on low-fps systems. Thanks to pjbaron for his help with all of these related changes. We have separated the logic and render updates to permit slow motion and time slicing effects. We've fixed time calling to fix physics problems caused by variable time updates (i.e. collisions sometimes missing, objects tunneling, etc) Once per frame calling for rendering and tweening to keep things as smooth as possible Calculates a `suggestedFps` value (in multiples of 5 fps) based on a 2 second average of actual elapsed time values in the `Time.update` method. This is recalculated every 2 seconds so it could be used on a level-by-level basis if a game varies dramatically. I.e. if the fps rate consistently drops, you can adjust your game effects accordingly. Game loop now tries to "catch up" frames if it is falling behind by iterating the logic update. This will help if the logic is occasionally causing things to run too slow, or if the renderer occasionally pushes the combined frame time over the FPS time. It's not a band-aid for a game that floods a low powered device however, so you still need to code accordingly. But it should help capture issues such as gc spikes or temporarily overloaded CPUs. It now detects 'spiralling' which happens if a lot of frames are pushed out in succession meaning the CPU can never "catch up". It skips frames instead of trying to catch them up in this case. Note: the time value passed to the logic update functions is always constant regardless of these shenanigans. Signals to the game program if there is a problem which might be fixed by lowering the desiredFps Time.desiredFps is the new desired frame rate for your game. Time.suggestedFps is the suggested frame rate for the game based on system load. Time.slowMotion allows you to push the game into a slow motion mode. The default value is 1.0. 2.0 would be half speed, and so on. Time.timeCap is no longer used and now deprecated. All timing is now handled by the fixed time-step code we've introduced.
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/**
* @property {integer} _width - Private internal var.
* @private
*/
this._width = 800;
/**
* @property {integer} _height - Private internal var.
* @private
*/
this._height = 600;
/**
* @property {boolean} transparent - Use a transparent canvas background or not.
* @default
*/
this.transparent = false;
/**
* @property {boolean} antialias - Anti-alias graphics. By default scaled images are smoothed in Canvas and WebGL, set anti-alias to false to disable this globally.
* @default
*/
this.antialias = true;
/**
* @property {boolean} preserveDrawingBuffer - The value of the preserveDrawingBuffer flag affects whether or not the contents of the stencil buffer is retained after rendering.
* @default
*/
this.preserveDrawingBuffer = false;
/**
* @property {PIXI.CanvasRenderer|PIXI.WebGLRenderer} renderer - The Pixi Renderer.
*/
this.renderer = null;
/**
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* @property {number} renderType - The Renderer this game will use. Either Phaser.AUTO, Phaser.CANVAS or Phaser.WEBGL.
*/
this.renderType = Phaser.AUTO;
/**
* @property {Phaser.StateManager} state - The StateManager.
*/
this.state = null;
/**
* @property {boolean} isBooted - Whether the game engine is booted, aka available.
* @default
*/
this.isBooted = false;
/**
* @property {boolean} id -Is game running or paused?
* @default
*/
this.isRunning = false;
/**
* @property {Phaser.RequestAnimationFrame} raf - Automatically handles the core game loop via requestAnimationFrame or setTimeout
*/
this.raf = null;
/**
* @property {Phaser.GameObjectFactory} add - Reference to the Phaser.GameObjectFactory.
*/
this.add = null;
/**
* @property {Phaser.GameObjectCreator} make - Reference to the GameObject Creator.
*/
this.make = null;
/**
* @property {Phaser.Cache} cache - Reference to the assets cache.
*/
this.cache = null;
/**
* @property {Phaser.Input} input - Reference to the input manager
*/
this.input = null;
/**
* @property {Phaser.Loader} load - Reference to the assets loader.
*/
this.load = null;
/**
* @property {Phaser.Math} math - Reference to the math helper.
*/
this.math = null;
/**
* @property {Phaser.Net} net - Reference to the network class.
*/
this.net = null;
/**
* @property {Phaser.ScaleManager} scale - The game scale manager.
*/
this.scale = null;
/**
* @property {Phaser.SoundManager} sound - Reference to the sound manager.
*/
this.sound = null;
/**
* @property {Phaser.Stage} stage - Reference to the stage.
*/
this.stage = null;
/**
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* @property {Phaser.Time} time - Reference to the core game clock.
*/
this.time = null;
/**
* @property {Phaser.TweenManager} tweens - Reference to the tween manager.
*/
this.tweens = null;
/**
* @property {Phaser.World} world - Reference to the world.
*/
this.world = null;
/**
* @property {Phaser.Physics} physics - Reference to the physics manager.
*/
this.physics = null;
/**
* @property {Phaser.RandomDataGenerator} rnd - Instance of repeatable random data generator helper.
*/
this.rnd = null;
/**
* @property {Phaser.Device} device - Contains device information and capabilities.
*/
this.device = null;
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/**
* @property {Phaser.Camera} camera - A handy reference to world.camera.
*/
this.camera = null;
/**
* @property {HTMLCanvasElement} canvas - A handy reference to renderer.view, the canvas that the game is being rendered in to.
*/
this.canvas = null;
/**
* @property {CanvasRenderingContext2D} context - A handy reference to renderer.context (only set for CANVAS games, not WebGL)
*/
this.context = null;
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/**
* @property {Phaser.Utils.Debug} debug - A set of useful debug utilitie.
*/
this.debug = null;
/**
* @property {Phaser.Particles} particles - The Particle Manager.
*/
this.particles = null;
/**
* @property {boolean} stepping - Enable core loop stepping with Game.enableStep().
* @default
* @readonly
*/
this.stepping = false;
/**
* @property {boolean} pendingStep - An internal property used by enableStep, but also useful to query from your own game objects.
* @default
* @readonly
*/
this.pendingStep = false;
/**
* @property {number} stepCount - When stepping is enabled this contains the current step cycle.
* @default
* @readonly
*/
this.stepCount = 0;
/**
* @property {Phaser.Signal} onPause - This event is fired when the game pauses.
*/
this.onPause = null;
/**
* @property {Phaser.Signal} onResume - This event is fired when the game resumes from a paused state.
*/
this.onResume = null;
/**
* @property {Phaser.Signal} onBlur - This event is fired when the game no longer has focus (typically on page hide).
*/
this.onBlur = null;
/**
* @property {Phaser.Signal} onFocus - This event is fired when the game has focus (typically on page show).
*/
this.onFocus = null;
/**
* @property {boolean} _paused - Is game paused?
* @private
*/
this._paused = false;
/**
* @property {boolean} _codePaused - Was the game paused via code or a visibility change?
* @private
*/
this._codePaused = false;
A large refactor to how the internal game timers and physics calculations has been made. We've now swapped to using a fixed time step internally across Phaser, instead of the variable one we had before that caused glitchse on low-fps systems. Thanks to pjbaron for his help with all of these related changes. We have separated the logic and render updates to permit slow motion and time slicing effects. We've fixed time calling to fix physics problems caused by variable time updates (i.e. collisions sometimes missing, objects tunneling, etc) Once per frame calling for rendering and tweening to keep things as smooth as possible Calculates a `suggestedFps` value (in multiples of 5 fps) based on a 2 second average of actual elapsed time values in the `Time.update` method. This is recalculated every 2 seconds so it could be used on a level-by-level basis if a game varies dramatically. I.e. if the fps rate consistently drops, you can adjust your game effects accordingly. Game loop now tries to "catch up" frames if it is falling behind by iterating the logic update. This will help if the logic is occasionally causing things to run too slow, or if the renderer occasionally pushes the combined frame time over the FPS time. It's not a band-aid for a game that floods a low powered device however, so you still need to code accordingly. But it should help capture issues such as gc spikes or temporarily overloaded CPUs. It now detects 'spiralling' which happens if a lot of frames are pushed out in succession meaning the CPU can never "catch up". It skips frames instead of trying to catch them up in this case. Note: the time value passed to the logic update functions is always constant regardless of these shenanigans. Signals to the game program if there is a problem which might be fixed by lowering the desiredFps Time.desiredFps is the new desired frame rate for your game. Time.suggestedFps is the suggested frame rate for the game based on system load. Time.slowMotion allows you to push the game into a slow motion mode. The default value is 1.0. 2.0 would be half speed, and so on. Time.timeCap is no longer used and now deprecated. All timing is now handled by the fixed time-step code we've introduced.
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/**
* @property {number} _deltaTime - accumulate elapsed time until a logic update is due
* @private
*/
this._deltaTime = 0;
/**
* @property {number} _lastCount - remember how many 'catch-up' iterations were used on the logicUpdate last frame
* @private
*/
this._lastCount = 0;
/**
* @property {number} _spiralling - if the 'catch-up' iterations are spiralling out of control, this counter is incremented
* @private
*/
this._spiralling = 0;
/**
* @property {Phaser.Signal} fpsProblemNotifier - if the game is struggling to maintain the desiredFps, this signal will be dispatched
* to suggest that the program adjust it's fps closer to the Time.suggestedFps value
* @public
*/
this.fpsProblemNotifier = new Phaser.Signal();
/**
* @property {number} _nextNotification - the soonest game.time.time value that the next fpsProblemNotifier can be dispatched
* @private
*/
this._nextFpsNotification = 0;
// Parse the configuration object (if any)
if (arguments.length === 1 && typeof arguments[0] === 'object')
{
this.parseConfig(arguments[0]);
}
else
{
this.config = { enableDebug: true };
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if (typeof width !== 'undefined')
{
this._width = width;
}
if (typeof height !== 'undefined')
{
this._height = height;
}
if (typeof renderer !== 'undefined')
{
this.renderType = renderer;
}
if (typeof parent !== 'undefined')
{
this.parent = parent;
}
if (typeof transparent !== 'undefined')
{
this.transparent = transparent;
}
if (typeof antialias !== 'undefined')
{
this.antialias = antialias;
}
this.rnd = new Phaser.RandomDataGenerator([(Date.now() * Math.random()).toString()]);
this.state = new Phaser.StateManager(this, state);
}
var _this = this;
this._onBoot = function () {
return _this.boot();
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};
if (document.readyState === 'complete' || document.readyState === 'interactive')
{
window.setTimeout(this._onBoot, 0);
}
else if(typeof window.cordova !== "undefined")
{
document.addEventListener('deviceready', this._onBoot, false);
}
else
{
document.addEventListener('DOMContentLoaded', this._onBoot, false);
window.addEventListener('load', this._onBoot, false);
}
return this;
};
Phaser.Game.prototype = {
/**
* Parses a Game configuration object.
*
* @method Phaser.Game#parseConfig
* @protected
*/
parseConfig: function (config) {
this.config = config;
if (typeof config['enableDebug'] === 'undefined')
{
this.config.enableDebug = true;
}
if (config['width'])
{
this._width = config['width'];
}
if (config['height'])
{
this._height = config['height'];
}
if (config['renderer'])
{
this.renderType = config['renderer'];
}
if (config['parent'])
{
this.parent = config['parent'];
}
if (config['transparent'])
{
this.transparent = config['transparent'];
}
if (config['antialias'])
{
this.antialias = config['antialias'];
}
if (config['preserveDrawingBuffer'])
{
this.preserveDrawingBuffer = config['preserveDrawingBuffer'];
}
if (config['physicsConfig'])
{
this.physicsConfig = config['physicsConfig'];
}
var seed = [(Date.now() * Math.random()).toString()];
if (config['seed'])
{
seed = config['seed'];
}
this.rnd = new Phaser.RandomDataGenerator(seed);
var state = null;
if (config['state'])
{
state = config['state'];
}
this.state = new Phaser.StateManager(this, state);
},
/**
* Initialize engine sub modules and start the game.
*
* @method Phaser.Game#boot
* @protected
*/
boot: function () {
if (this.isBooted)
{
return;
}
if (!document.body)
{
window.setTimeout(this._onBoot, 20);
}
else
{
document.removeEventListener('DOMContentLoaded', this._onBoot);
window.removeEventListener('load', this._onBoot);
this.onPause = new Phaser.Signal();
this.onResume = new Phaser.Signal();
this.onBlur = new Phaser.Signal();
this.onFocus = new Phaser.Signal();
this.isBooted = true;
this.device = new Phaser.Device(this);
this.math = Phaser.Math;
this.scale = new Phaser.ScaleManager(this, this._width, this._height);
this.stage = new Phaser.Stage(this);
this.setUpRenderer();
this.device.checkFullScreenSupport();
this.world = new Phaser.World(this);
this.add = new Phaser.GameObjectFactory(this);
this.make = new Phaser.GameObjectCreator(this);
this.cache = new Phaser.Cache(this);
this.load = new Phaser.Loader(this);
this.time = new Phaser.Time(this);
this.tweens = new Phaser.TweenManager(this);
this.input = new Phaser.Input(this);
this.sound = new Phaser.SoundManager(this);
this.physics = new Phaser.Physics(this, this.physicsConfig);
this.particles = new Phaser.Particles(this);
this.plugins = new Phaser.PluginManager(this);
this.net = new Phaser.Net(this);
this.time.boot();
this.stage.boot();
this.world.boot();
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this.scale.boot();
this.input.boot();
this.sound.boot();
this.state.boot();
if (this.config['enableDebug'])
{
this.debug = new Phaser.Utils.Debug(this);
this.debug.boot();
}
this.showDebugHeader();
this.isRunning = true;
if (this.config && this.config['forceSetTimeOut'])
{
this.raf = new Phaser.RequestAnimationFrame(this, this.config['forceSetTimeOut']);
}
else
{
this.raf = new Phaser.RequestAnimationFrame(this, false);
}
this.raf.start();
}
},
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/**
* Displays a Phaser version debug header in the console.
*
* @method Phaser.Game#showDebugHeader
* @protected
*/
showDebugHeader: function () {
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var v = Phaser.VERSION;
var r = 'Canvas';
var a = 'HTML Audio';
var c = 1;
if (this.renderType === Phaser.WEBGL)
{
r = 'WebGL';
c++;
}
else if (this.renderType == Phaser.HEADLESS)
{
r = 'Headless';
}
if (this.device.webAudio)
{
a = 'WebAudio';
c++;
}
if (this.device.chrome)
{
var args = [
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'%c %c %c Phaser v' + v + ' | Pixi.js ' + PIXI.VERSION + ' | ' + r + ' | ' + a + ' %c %c ' + ' http://phaser.io %c %c \u2665%c\u2665%c\u2665 ',
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'background: #7a66a3',
'background: #625186',
'color: #ffffff; background: #43375b;',
'background: #625186',
'background: #ccb9f2',
'background: #625186'
];
for (var i = 0; i < 3; i++)
{
if (i < c)
{
args.push('color: #ff2424; background: #fff');
}
else
{
args.push('color: #959595; background: #fff');
}
}
console.log.apply(console, args);
}
else if (window['console'])
{
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console.log('Phaser v' + v + ' | Pixi.js ' + PIXI.VERSION + ' | ' + r + ' | ' + a + ' | http://phaser.io');
}
},
/**
* Checks if the device is capable of using the requested renderer and sets it up or an alternative if not.
*
* @method Phaser.Game#setUpRenderer
* @protected
*/
setUpRenderer: function () {
if (this.config['canvasID'])
{
this.canvas = Phaser.Canvas.create(this.width, this.height, this.config['canvasID']);
}
else
{
this.canvas = Phaser.Canvas.create(this.width, this.height);
}
if (this.config['canvasStyle'])
{
this.canvas.style = this.config['canvasStyle'];
}
else
{
this.canvas.style['-webkit-full-screen'] = 'width: 100%; height: 100%';
}
if (this.device.cocoonJS)
{
if (this.renderType === Phaser.CANVAS)
{
this.canvas.screencanvas = true;
}
else
{
// Some issue related to scaling arise with Cocoon using screencanvas and webgl renderer.
this.canvas.screencanvas = false;
}
}
if (this.renderType === Phaser.HEADLESS || this.renderType === Phaser.CANVAS || (this.renderType === Phaser.AUTO && this.device.webGL === false))
{
if (this.device.canvas)
{
if (this.renderType === Phaser.AUTO)
{
this.renderType = Phaser.CANVAS;
}
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this.renderer = new PIXI.CanvasRenderer(this.width, this.height, { "view": this.canvas, "transparent": this.transparent, "resolution": 1, "clearBeforeRender": true });
this.context = this.renderer.context;
}
else
{
throw new Error('Phaser.Game - cannot create Canvas or WebGL context, aborting.');
}
}
else
{
// They requested WebGL and their browser supports it
this.renderType = Phaser.WEBGL;
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this.renderer = new PIXI.WebGLRenderer(this.width, this.height, { "view": this.canvas, "transparent": this.transparent, "resolution": 1, "antialias": this.antialias, "preserveDrawingBuffer": this.preserveDrawingBuffer });
this.context = null;
}
if (this.renderType !== Phaser.HEADLESS)
{
this.stage.smoothed = this.antialias;
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Phaser.Canvas.addToDOM(this.canvas, this.parent, false);
Phaser.Canvas.setTouchAction(this.canvas);
}
},
/**
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* The core game loop.
*
* @method Phaser.Game#update
* @protected
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* @param {number} time - The current time as provided by RequestAnimationFrame.
*/
update: function (time) {
this.time.update(time);
A large refactor to how the internal game timers and physics calculations has been made. We've now swapped to using a fixed time step internally across Phaser, instead of the variable one we had before that caused glitchse on low-fps systems. Thanks to pjbaron for his help with all of these related changes. We have separated the logic and render updates to permit slow motion and time slicing effects. We've fixed time calling to fix physics problems caused by variable time updates (i.e. collisions sometimes missing, objects tunneling, etc) Once per frame calling for rendering and tweening to keep things as smooth as possible Calculates a `suggestedFps` value (in multiples of 5 fps) based on a 2 second average of actual elapsed time values in the `Time.update` method. This is recalculated every 2 seconds so it could be used on a level-by-level basis if a game varies dramatically. I.e. if the fps rate consistently drops, you can adjust your game effects accordingly. Game loop now tries to "catch up" frames if it is falling behind by iterating the logic update. This will help if the logic is occasionally causing things to run too slow, or if the renderer occasionally pushes the combined frame time over the FPS time. It's not a band-aid for a game that floods a low powered device however, so you still need to code accordingly. But it should help capture issues such as gc spikes or temporarily overloaded CPUs. It now detects 'spiralling' which happens if a lot of frames are pushed out in succession meaning the CPU can never "catch up". It skips frames instead of trying to catch them up in this case. Note: the time value passed to the logic update functions is always constant regardless of these shenanigans. Signals to the game program if there is a problem which might be fixed by lowering the desiredFps Time.desiredFps is the new desired frame rate for your game. Time.suggestedFps is the suggested frame rate for the game based on system load. Time.slowMotion allows you to push the game into a slow motion mode. The default value is 1.0. 2.0 would be half speed, and so on. Time.timeCap is no longer used and now deprecated. All timing is now handled by the fixed time-step code we've introduced.
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// if the logic time is spiralling upwards, skip a frame entirely
if (this._spiralling > 1)
{
// cause an event to warn the program that this CPU can't keep up with the current desiredFps rate
if (this.time.time > this._nextFpsNotification)
{
// only permit one fps notification per 10 seconds
this._nextFpsNotification = this.time.time + 1000 * 10;
// dispatch the notification signal
this.fpsProblemNotifier.dispatch();
}
// reset the _deltaTime accumulator which will cause all pending dropped frames to be permanently skipped
this._deltaTime = 0;
this._spiralling = 0;
}
else
{
// step size taking into account the slow motion speed
var slowStep = this.time.slowMotion * 1000.0 / this.time.desiredFps;
// accumulate time until the slowStep threshold is met or exceeded
this._deltaTime += Math.max(Math.min(1000, this.time.elapsed), 0);
// call the game update logic multiple times if necessary to "catch up" with dropped frames
var count = 0;
while (this._deltaTime >= slowStep)
{
this._deltaTime -= slowStep;
this.updateLogic(1.0 / this.time.desiredFps);
count++;
}
// detect spiralling (if the catch-up loop isn't fast enough, the number of iterations will increase constantly)
if (count > this._lastCount)
{
this._spiralling++;
}
else if (count < this._lastCount)
{
// looks like it caught up successfully, reset the spiral alert counter
this._spiralling = 0;
}
this._lastCount = count;
}
// call the game render update exactly once every frame
this.updateRender(this._deltaTime / slowStep);
},
updateLogic: function (timeStep) {
if (!this._paused && !this.pendingStep)
{
if (this.stepping)
{
this.pendingStep = true;
}
this.scale.preUpdate();
if (this.config['enableDebug'])
{
this.debug.preUpdate();
}
this.physics.preUpdate();
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this.state.preUpdate(timeStep);
this.plugins.preUpdate(timeStep);
this.stage.preUpdate();
this.state.update();
this.stage.update();
this.sound.update();
this.input.update();
this.physics.update();
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this.particles.update();
this.plugins.update();
this.stage.postUpdate();
this.plugins.postUpdate();
}
else
{
this.state.pauseUpdate();
if (this.config['enableDebug'])
{
this.debug.preUpdate();
}
}
A large refactor to how the internal game timers and physics calculations has been made. We've now swapped to using a fixed time step internally across Phaser, instead of the variable one we had before that caused glitchse on low-fps systems. Thanks to pjbaron for his help with all of these related changes. We have separated the logic and render updates to permit slow motion and time slicing effects. We've fixed time calling to fix physics problems caused by variable time updates (i.e. collisions sometimes missing, objects tunneling, etc) Once per frame calling for rendering and tweening to keep things as smooth as possible Calculates a `suggestedFps` value (in multiples of 5 fps) based on a 2 second average of actual elapsed time values in the `Time.update` method. This is recalculated every 2 seconds so it could be used on a level-by-level basis if a game varies dramatically. I.e. if the fps rate consistently drops, you can adjust your game effects accordingly. Game loop now tries to "catch up" frames if it is falling behind by iterating the logic update. This will help if the logic is occasionally causing things to run too slow, or if the renderer occasionally pushes the combined frame time over the FPS time. It's not a band-aid for a game that floods a low powered device however, so you still need to code accordingly. But it should help capture issues such as gc spikes or temporarily overloaded CPUs. It now detects 'spiralling' which happens if a lot of frames are pushed out in succession meaning the CPU can never "catch up". It skips frames instead of trying to catch them up in this case. Note: the time value passed to the logic update functions is always constant regardless of these shenanigans. Signals to the game program if there is a problem which might be fixed by lowering the desiredFps Time.desiredFps is the new desired frame rate for your game. Time.suggestedFps is the suggested frame rate for the game based on system load. Time.slowMotion allows you to push the game into a slow motion mode. The default value is 1.0. 2.0 would be half speed, and so on. Time.timeCap is no longer used and now deprecated. All timing is now handled by the fixed time-step code we've introduced.
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},
updateRender: function (elapsedTime) {
// update tweens once every frame along with the render logic (to keep them smooth in slowMotion scenarios)
if (!this._paused && !this.pendingStep)
{
this.tweens.update(elapsedTime);
}
if (this.renderType != Phaser.HEADLESS)
{
this.state.preRender();
this.renderer.render(this.stage);
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this.plugins.render();
this.state.render();
this.plugins.postRender();
if (this.device.cocoonJS && this.renderType === Phaser.CANVAS && this.stage.currentRenderOrderID === 1)
{
// Horrible hack! But without it Cocoon fails to render a scene with just a single drawImage call on it.
this.context.fillRect(0, 0, 0, 0);
}
}
},
/**
* Enable core game loop stepping. When enabled you must call game.step() directly (perhaps via a DOM button?)
* Calling step will advance the game loop by one frame. This is extremely useful for hard to track down errors!
*
* @method Phaser.Game#enableStep
*/
enableStep: function () {
this.stepping = true;
this.pendingStep = false;
this.stepCount = 0;
},
/**
* Disables core game loop stepping.
*
* @method Phaser.Game#disableStep
*/
disableStep: function () {
this.stepping = false;
this.pendingStep = false;
},
/**
* When stepping is enabled you must call this function directly (perhaps via a DOM button?) to advance the game loop by one frame.
* This is extremely useful to hard to track down errors! Use the internal stepCount property to monitor progress.
*
* @method Phaser.Game#step
*/
step: function () {
this.pendingStep = false;
this.stepCount++;
},
/**
* Nukes the entire game from orbit.
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*
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* @method Phaser.Game#destroy
*/
destroy: function () {
this.raf.stop();
this.state.destroy();
this.sound.destroy();
this.scale.destroy();
this.stage.destroy();
this.input.destroy();
this.physics.destroy();
this.state = null;
this.cache = null;
this.input = null;
this.load = null;
this.sound = null;
this.stage = null;
this.time = null;
this.world = null;
this.isBooted = false;
if (this.renderType === Phaser.WEBGL)
{
PIXI.glContexts[this.renderer.glContextId] = null;
this.renderer.projection = null;
this.renderer.offset = null;
this.renderer.shaderManager.destroy();
this.renderer.spriteBatch.destroy();
this.renderer.maskManager.destroy();
this.renderer.filterManager.destroy();
this.renderer.shaderManager = null;
this.renderer.spriteBatch = null;
this.renderer.maskManager = null;
this.renderer.filterManager = null;
this.renderer.gl = null;
this.renderer.renderSession = null;
Phaser.Canvas.removeFromDOM(this.canvas);
}
else
{
this.renderer.destroy(true);
}
Phaser.GAMES[this.id] = null;
},
/**
* Called by the Stage visibility handler.
*
* @method Phaser.Game#gamePaused
* @param {object} event - The DOM event that caused the game to pause, if any.
* @protected
*/
gamePaused: function (event) {
// If the game is already paused it was done via game code, so don't re-pause it
if (!this._paused)
{
this._paused = true;
this.time.gamePaused();
this.sound.setMute();
this.onPause.dispatch(event);
}
},
/**
* Called by the Stage visibility handler.
*
* @method Phaser.Game#gameResumed
* @param {object} event - The DOM event that caused the game to pause, if any.
* @protected
*/
gameResumed: function (event) {
// Game is paused, but wasn't paused via code, so resume it
if (this._paused && !this._codePaused)
{
this._paused = false;
this.time.gameResumed();
this.input.reset();
this.sound.unsetMute();
this.onResume.dispatch(event);
}
},
/**
* Called by the Stage visibility handler.
*
* @method Phaser.Game#focusLoss
* @param {object} event - The DOM event that caused the game to pause, if any.
* @protected
*/
focusLoss: function (event) {
this.onBlur.dispatch(event);
if (!this.stage.disableVisibilityChange)
{
this.gamePaused(event);
}
},
/**
* Called by the Stage visibility handler.
*
* @method Phaser.Game#focusGain
* @param {object} event - The DOM event that caused the game to pause, if any.
* @protected
*/
focusGain: function (event) {
this.onFocus.dispatch(event);
if (!this.stage.disableVisibilityChange)
{
this.gameResumed(event);
}
}
};
Phaser.Game.prototype.constructor = Phaser.Game;
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/**
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* The paused state of the Game. A paused game doesn't update any of its subsystems.
* When a game is paused the onPause event is dispatched. When it is resumed the onResume event is dispatched.
* @name Phaser.Game#paused
* @property {boolean} paused - Gets and sets the paused state of the Game.
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*/
Object.defineProperty(Phaser.Game.prototype, "paused", {
get: function () {
return this._paused;
},
set: function (value) {
if (value === true)
{
if (this._paused === false)
{
this._paused = true;
this.sound.setMute();
this.time.gamePaused();
this.onPause.dispatch(this);
}
this._codePaused = true;
}
else
{
if (this._paused)
{
this._paused = false;
this.input.reset();
this.sound.unsetMute();
this.time.gameResumed();
this.onResume.dispatch(this);
}
this._codePaused = false;
}
}
});
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/**
* "Deleted code is debugged code." - Jeff Sickel
*/