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<div id="main">
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<h1 class="page-title">Source: time/Time.js</h1>
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<section>
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<article>
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<pre class="sunlight-highlight-javascript linenums">/**
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* @author Richard Davey <rich@photonstorm.com>
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* @copyright 2014 Photon Storm Ltd.
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* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
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*/
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/**
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* Time constructor.
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*
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* @class Phaser.Time
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* @classdesc This is the core internal game clock. It manages the elapsed time and calculation of elapsed values, used for game object motion and tweens.
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* @constructor
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* @param {Phaser.Game} game A reference to the currently running game.
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*/
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Phaser.Time = function (game) {
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/**
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* @property {Phaser.Game} game - Local reference to game.
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*/
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|
this.game = game;
|
|
|
|
/**
|
|
* @property {number} time - Game time counter. If you need a value for in-game calculation please use Phaser.Time.now instead.
|
|
* @protected
|
|
*/
|
|
this.time = 0;
|
|
|
|
/**
|
|
* @property {number} now - The time right now.
|
|
* @protected
|
|
*/
|
|
this.now = 0;
|
|
|
|
/**
|
|
* @property {number} elapsed - Elapsed time since the last frame (in ms).
|
|
* @protected
|
|
*/
|
|
this.elapsed = 0;
|
|
|
|
/**
|
|
* @property {number} pausedTime - Records how long the game has been paused for. Is reset each time the game pauses.
|
|
* @protected
|
|
*/
|
|
this.pausedTime = 0;
|
|
|
|
/**
|
|
* @property {boolean} advancedTiming - If true Phaser.Time will perform advanced profiling including the fps rate, fps min/max and msMin and msMax.
|
|
* @default
|
|
*/
|
|
this.advancedTiming = false;
|
|
|
|
/**
|
|
* @property {number} fps - Frames per second. Only calculated if Time.advancedTiming is true.
|
|
* @protected
|
|
*/
|
|
this.fps = 0;
|
|
|
|
/**
|
|
* @property {number} fpsMin - The lowest rate the fps has dropped to. Only calculated if Time.advancedTiming is true.
|
|
*/
|
|
this.fpsMin = 1000;
|
|
|
|
/**
|
|
* @property {number} fpsMax - The highest rate the fps has reached (usually no higher than 60fps). Only calculated if Time.advancedTiming is true.
|
|
*/
|
|
this.fpsMax = 0;
|
|
|
|
/**
|
|
* @property {number} msMin - The minimum amount of time the game has taken between two frames. Only calculated if Time.advancedTiming is true.
|
|
* @default
|
|
*/
|
|
this.msMin = 1000;
|
|
|
|
/**
|
|
* @property {number} msMax - The maximum amount of time the game has taken between two frames. Only calculated if Time.advancedTiming is true.
|
|
*/
|
|
this.msMax = 0;
|
|
|
|
/**
|
|
* @property {number} physicsElapsed - The elapsed time calculated for the physics motion updates. In a stable 60fps system this will be 0.016 every frame.
|
|
*/
|
|
this.physicsElapsed = 0;
|
|
|
|
/**
|
|
* @property {number} deltaCap - If you need to cap the delta timer, set the value here. For 60fps the delta should be 0.016, so try variances just above this.
|
|
*/
|
|
this.deltaCap = 0;
|
|
|
|
/**
|
|
* @property {number} timeCap - If the difference in time between two frame updates exceeds this value, the frame time is reset to avoid huge elapsed counts.
|
|
*/
|
|
this.timeCap = 1000;
|
|
|
|
/**
|
|
* @property {number} frames - The number of frames record in the last second. Only calculated if Time.advancedTiming is true.
|
|
*/
|
|
this.frames = 0;
|
|
|
|
/**
|
|
* @property {number} pauseDuration - Records how long the game was paused for in miliseconds.
|
|
*/
|
|
this.pauseDuration = 0;
|
|
|
|
/**
|
|
* @property {number} timeToCall - The value that setTimeout needs to work out when to next update
|
|
*/
|
|
this.timeToCall = 0;
|
|
|
|
/**
|
|
* @property {number} lastTime - Internal value used by timeToCall as part of the setTimeout loop
|
|
*/
|
|
this.lastTime = 0;
|
|
|
|
/**
|
|
* @property {Phaser.Timer} events - This is a Phaser.Timer object bound to the master clock to which you can add timed events.
|
|
*/
|
|
this.events = new Phaser.Timer(this.game, false);
|
|
|
|
/**
|
|
* @property {number} _started - The time at which the Game instance started.
|
|
* @private
|
|
*/
|
|
this._started = 0;
|
|
|
|
/**
|
|
* @property {number} _timeLastSecond - The time (in ms) that the last second counter ticked over.
|
|
* @private
|
|
*/
|
|
this._timeLastSecond = 0;
|
|
|
|
/**
|
|
* @property {number} _pauseStarted - The time the game started being paused.
|
|
* @private
|
|
*/
|
|
this._pauseStarted = 0;
|
|
|
|
/**
|
|
* @property {boolean} _justResumed - Internal value used to recover from the game pause state.
|
|
* @private
|
|
*/
|
|
this._justResumed = false;
|
|
|
|
/**
|
|
* @property {array} _timers - Internal store of Phaser.Timer objects.
|
|
* @private
|
|
*/
|
|
this._timers = [];
|
|
|
|
/**
|
|
* @property {number} _len - Temp. array length variable.
|
|
* @private
|
|
*/
|
|
this._len = 0;
|
|
|
|
/**
|
|
* @property {number} _i - Temp. array counter variable.
|
|
* @private
|
|
*/
|
|
this._i = 0;
|
|
|
|
};
|
|
|
|
Phaser.Time.prototype = {
|
|
|
|
/**
|
|
* Called automatically by Phaser.Game after boot. Should not be called directly.
|
|
*
|
|
* @method Phaser.Time#boot
|
|
* @protected
|
|
*/
|
|
boot: function () {
|
|
|
|
this._started = Date.now();
|
|
this.events.start();
|
|
|
|
},
|
|
|
|
/**
|
|
* Creates a new stand-alone Phaser.Timer object.
|
|
*
|
|
* @method Phaser.Time#create
|
|
* @param {boolean} [autoDestroy=true] - A Timer that is set to automatically destroy itself will do so after all of its events have been dispatched (assuming no looping events).
|
|
* @return {Phaser.Timer} The Timer object that was created.
|
|
*/
|
|
create: function (autoDestroy) {
|
|
|
|
if (typeof autoDestroy === 'undefined') { autoDestroy = true; }
|
|
|
|
var timer = new Phaser.Timer(this.game, autoDestroy);
|
|
|
|
this._timers.push(timer);
|
|
|
|
return timer;
|
|
|
|
},
|
|
|
|
/**
|
|
* Remove all Timer objects, regardless of their state. Also clears all Timers from the Time.events timer.
|
|
*
|
|
* @method Phaser.Time#removeAll
|
|
*/
|
|
removeAll: function () {
|
|
|
|
for (var i = 0; i < this._timers.length; i++)
|
|
{
|
|
this._timers[i].destroy();
|
|
}
|
|
|
|
this._timers = [];
|
|
|
|
this.events.removeAll();
|
|
|
|
},
|
|
|
|
/**
|
|
* Updates the game clock and if enabled the advanced timing data. This is called automatically by Phaser.Game.
|
|
*
|
|
* @method Phaser.Time#update
|
|
* @protected
|
|
* @param {number} time - The current timestamp.
|
|
*/
|
|
update: function (time) {
|
|
|
|
this.now = time;
|
|
|
|
this.timeToCall = this.game.math.max(0, 16 - (time - this.lastTime));
|
|
|
|
this.elapsed = this.now - this.time;
|
|
|
|
// spike-dislike
|
|
if (this.elapsed > this.timeCap)
|
|
{
|
|
// For some reason the time between now and the last time the game was updated was larger than our timeCap
|
|
// This can happen if the Stage.disableVisibilityChange is true and you swap tabs, which makes the raf pause.
|
|
// In this case we'll drop to some default values to stop the game timers going nuts.
|
|
this.elapsed = 1 / 60;
|
|
}
|
|
|
|
// Calculate physics elapsed, ensure it's > 0, use 1/60 as a fallback
|
|
this.physicsElapsed = this.elapsed / 1000 || 1 / 60;
|
|
|
|
if (this.deltaCap > 0 && this.physicsElapsed > this.deltaCap)
|
|
{
|
|
this.physicsElapsed = this.deltaCap;
|
|
}
|
|
|
|
if (this.advancedTiming)
|
|
{
|
|
this.msMin = this.game.math.min(this.msMin, this.elapsed);
|
|
this.msMax = this.game.math.max(this.msMax, this.elapsed);
|
|
|
|
this.frames++;
|
|
|
|
if (this.now > this._timeLastSecond + 1000)
|
|
{
|
|
this.fps = Math.round((this.frames * 1000) / (this.now - this._timeLastSecond));
|
|
this.fpsMin = this.game.math.min(this.fpsMin, this.fps);
|
|
this.fpsMax = this.game.math.max(this.fpsMax, this.fps);
|
|
this._timeLastSecond = this.now;
|
|
this.frames = 0;
|
|
}
|
|
}
|
|
|
|
this.time = this.now;
|
|
this.lastTime = time + this.timeToCall;
|
|
|
|
// Paused but still running?
|
|
if (!this.game.paused)
|
|
{
|
|
// Our internal Phaser.Timer
|
|
this.events.update(this.now);
|
|
|
|
// Any game level timers
|
|
this._i = 0;
|
|
this._len = this._timers.length;
|
|
|
|
while (this._i < this._len)
|
|
{
|
|
if (this._timers[this._i].update(this.now))
|
|
{
|
|
this._i++;
|
|
}
|
|
else
|
|
{
|
|
this._timers.splice(this._i, 1);
|
|
|
|
this._len--;
|
|
}
|
|
}
|
|
}
|
|
|
|
},
|
|
|
|
/**
|
|
* Called when the game enters a paused state.
|
|
*
|
|
* @method Phaser.Time#gamePaused
|
|
* @private
|
|
*/
|
|
gamePaused: function () {
|
|
|
|
this._pauseStarted = this.now;
|
|
|
|
this.events.pause();
|
|
|
|
var i = this._timers.length;
|
|
|
|
while (i--)
|
|
{
|
|
this._timers[i]._pause();
|
|
}
|
|
|
|
},
|
|
|
|
/**
|
|
* Called when the game resumes from a paused state.
|
|
*
|
|
* @method Phaser.Time#gameResumed
|
|
* @private
|
|
*/
|
|
gameResumed: function () {
|
|
|
|
// Level out the elapsed timer to avoid spikes
|
|
this.time = this.now = Date.now();
|
|
|
|
this.pauseDuration = this.time - this._pauseStarted;
|
|
|
|
this.events.resume();
|
|
|
|
var i = this._timers.length;
|
|
|
|
while (i--)
|
|
{
|
|
this._timers[i]._resume();
|
|
}
|
|
|
|
},
|
|
|
|
/**
|
|
* The number of seconds that have elapsed since the game was started.
|
|
*
|
|
* @method Phaser.Time#totalElapsedSeconds
|
|
* @return {number} The number of seconds that have elapsed since the game was started.
|
|
*/
|
|
totalElapsedSeconds: function() {
|
|
return (this.now - this._started) * 0.001;
|
|
},
|
|
|
|
/**
|
|
* How long has passed since the given time.
|
|
*
|
|
* @method Phaser.Time#elapsedSince
|
|
* @param {number} since - The time you want to measure against.
|
|
* @return {number} The difference between the given time and now.
|
|
*/
|
|
elapsedSince: function (since) {
|
|
return this.now - since;
|
|
},
|
|
|
|
/**
|
|
* How long has passed since the given time (in seconds).
|
|
*
|
|
* @method Phaser.Time#elapsedSecondsSince
|
|
* @param {number} since - The time you want to measure (in seconds).
|
|
* @return {number} Duration between given time and now (in seconds).
|
|
*/
|
|
elapsedSecondsSince: function (since) {
|
|
return (this.now - since) * 0.001;
|
|
},
|
|
|
|
/**
|
|
* Resets the private _started value to now and removes all currently running Timers.
|
|
*
|
|
* @method Phaser.Time#reset
|
|
*/
|
|
reset: function () {
|
|
|
|
this._started = this.now;
|
|
this.removeAll();
|
|
|
|
}
|
|
|
|
};
|
|
|
|
Phaser.Time.prototype.constructor = Phaser.Time;
|
|
</pre>
|
|
</article>
|
|
</section>
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<div class="clearfix"></div>
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<footer>
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|
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<span class="copyright">
|
|
Phaser Copyright © 2012-2014 Photon Storm Ltd.
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</span>
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<br />
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<span class="jsdoc-message">
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Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.3.0-dev</a>
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on Tue May 20 2014 10:05:50 GMT+0100 (BST) using the <a href="https://github.com/terryweiss/docstrap">DocStrap template</a>.
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