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1132 lines
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<h1 class="page-title">Source: tween/Tween.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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* Tween constructor
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* Create a new <code>Tween</code>.
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*
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* @class Phaser.Tween
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* @constructor
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* @param {object} object - Target object will be affected by this tween.
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* @param {Phaser.Game} game - Current game instance.
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*/
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Phaser.Tween = function (object, game) {
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/**
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* Reference to the target object.
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* @property {object} _object
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* @private
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*/
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this._object = object;
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/**
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* @property {Phaser.Game} game - A reference to the currently running Game.
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*/
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this.game = game;
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/**
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* @property {Phaser.TweenManager} _manager - Reference to the TweenManager.
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* @private
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*/
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this._manager = this.game.tweens;
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/**
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* @property {object} _valuesStart - Private value object.
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* @private
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*/
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this._valuesStart = {};
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/**
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* @property {object} _valuesEnd - Private value object.
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* @private
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*/
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this._valuesEnd = {};
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/**
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* @property {object} _valuesStartRepeat - Private value object.
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* @private
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*/
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this._valuesStartRepeat = {};
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/**
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* @property {number} _duration - Private duration counter.
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* @private
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* @default
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*/
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this._duration = 1000;
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/**
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* @property {number} _repeat - Private repeat counter.
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* @private
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* @default
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*/
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this._repeat = 0;
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/**
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* @property {boolean} _yoyo - Private yoyo flag.
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* @private
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* @default
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*/
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this._yoyo = false;
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/**
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* @property {boolean} _reversed - Private reversed flag.
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* @private
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* @default
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*/
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this._reversed = false;
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/**
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* @property {number} _delayTime - Private delay counter.
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* @private
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* @default
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*/
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this._delayTime = 0;
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/**
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* @property {number} _startTime - Private start time counter.
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* @private
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* @default null
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*/
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this._startTime = null;
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/**
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* @property {function} _easingFunction - The easing function used for the tween.
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* @private
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*/
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this._easingFunction = Phaser.Easing.Linear.None;
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/**
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* @property {function} _interpolationFunction - The interpolation function used for the tween.
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* @private
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*/
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this._interpolationFunction = Phaser.Math.linearInterpolation;
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/**
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* @property {array} _chainedTweens - A private array of chained tweens.
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* @private
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*/
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this._chainedTweens = [];
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/**
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* @property {boolean} _onStartCallbackFired - Private flag.
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* @private
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* @default
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*/
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this._onStartCallbackFired = false;
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/**
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* @property {function} _onUpdateCallback - An onUpdate callback.
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* @private
|
|
* @default null
|
|
*/
|
|
this._onUpdateCallback = null;
|
|
|
|
/**
|
|
* @property {object} _onUpdateCallbackContext - The context in which to call the onUpdate callback.
|
|
* @private
|
|
* @default null
|
|
*/
|
|
this._onUpdateCallbackContext = null;
|
|
|
|
/**
|
|
* @property {number} _pausedTime - Private pause timer.
|
|
* @private
|
|
* @default
|
|
*/
|
|
this._pausedTime = 0;
|
|
|
|
/**
|
|
* @property {boolean} pendingDelete - If this tween is ready to be deleted by the TweenManager.
|
|
* @default
|
|
*/
|
|
this.pendingDelete = false;
|
|
|
|
// Set all starting values present on the target object
|
|
for (var field in object)
|
|
{
|
|
this._valuesStart[field] = parseFloat(object[field], 10);
|
|
}
|
|
|
|
/**
|
|
* @property {Phaser.Signal} onStart - The onStart event is fired when the Tween begins.
|
|
*/
|
|
this.onStart = new Phaser.Signal();
|
|
|
|
/**
|
|
* @property {Phaser.Signal} onLoop - The onLoop event is fired if the Tween loops.
|
|
*/
|
|
this.onLoop = new Phaser.Signal();
|
|
|
|
/**
|
|
* @property {Phaser.Signal} onComplete - The onComplete event is fired when the Tween completes. Does not fire if the Tween is set to loop.
|
|
*/
|
|
this.onComplete = new Phaser.Signal();
|
|
|
|
/**
|
|
* @property {boolean} isRunning - If the tween is running this is set to true, otherwise false. Tweens that are in a delayed state, waiting to start, are considered as being running.
|
|
* @default
|
|
*/
|
|
this.isRunning = false;
|
|
|
|
};
|
|
|
|
Phaser.Tween.prototype = {
|
|
|
|
/**
|
|
* Configure the Tween
|
|
*
|
|
* @method Phaser.Tween#to
|
|
* @param {object} properties - Properties you want to tween.
|
|
* @param {number} [duration=1000] - Duration of this tween in ms.
|
|
* @param {function} [ease=null] - Easing function. If not set it will default to Phaser.Easing.Linear.None.
|
|
* @param {boolean} [autoStart=false] - Whether this tween will start automatically or not.
|
|
* @param {number} [delay=0] - Delay before this tween will start, defaults to 0 (no delay). Value given is in ms.
|
|
* @param {boolean} [repeat=0] - Should the tween automatically restart once complete? (ignores any chained tweens).
|
|
* @param {boolean} [yoyo=false] - A tween that yoyos will reverse itself when it completes.
|
|
* @return {Phaser.Tween} This Tween object.
|
|
*/
|
|
to: function (properties, duration, ease, autoStart, delay, repeat, yoyo) {
|
|
|
|
duration = duration || 1000;
|
|
ease = ease || null;
|
|
autoStart = autoStart || false;
|
|
delay = delay || 0;
|
|
repeat = repeat || 0;
|
|
yoyo = yoyo || false;
|
|
|
|
var self;
|
|
|
|
if (this._parent)
|
|
{
|
|
self = this._manager.create(this._object);
|
|
this._lastChild.chain(self);
|
|
this._lastChild = self;
|
|
}
|
|
else
|
|
{
|
|
self = this;
|
|
this._parent = this;
|
|
this._lastChild = this;
|
|
}
|
|
|
|
self._repeat = repeat;
|
|
self._duration = duration;
|
|
self._valuesEnd = properties;
|
|
|
|
if (ease !== null)
|
|
{
|
|
self._easingFunction = ease;
|
|
}
|
|
|
|
if (delay > 0)
|
|
{
|
|
self._delayTime = delay;
|
|
}
|
|
|
|
self._yoyo = yoyo;
|
|
|
|
if (autoStart)
|
|
{
|
|
return this.start();
|
|
}
|
|
else
|
|
{
|
|
return this;
|
|
}
|
|
|
|
},
|
|
|
|
/**
|
|
* Starts the tween running. Can also be called by the autoStart parameter of Tween.to.
|
|
*
|
|
* @method Phaser.Tween#start
|
|
* @return {Phaser.Tween} Itself.
|
|
*/
|
|
start: function () {
|
|
|
|
if (this.game === null || this._object === null)
|
|
{
|
|
return;
|
|
}
|
|
|
|
this._manager.add(this);
|
|
|
|
this.isRunning = true;
|
|
|
|
this._onStartCallbackFired = false;
|
|
|
|
this._startTime = this.game.time.now + this._delayTime;
|
|
|
|
for (var property in this._valuesEnd)
|
|
{
|
|
// check if an Array was provided as property value
|
|
if (this._valuesEnd[property] instanceof Array)
|
|
{
|
|
if (this._valuesEnd[property].length === 0)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
// create a local copy of the Array with the start value at the front
|
|
this._valuesEnd[property] = [this._object[property]].concat(this._valuesEnd[property]);
|
|
}
|
|
|
|
this._valuesStart[property] = this._object[property];
|
|
|
|
if ((this._valuesStart[property] instanceof Array) === false)
|
|
{
|
|
this._valuesStart[property] *= 1.0; // Ensures we're using numbers, not strings
|
|
}
|
|
|
|
this._valuesStartRepeat[property] = this._valuesStart[property] || 0;
|
|
|
|
}
|
|
|
|
return this;
|
|
|
|
},
|
|
|
|
/**
|
|
* Stops the tween if running and removes it from the TweenManager. If there are any onComplete callbacks or events they are not dispatched.
|
|
*
|
|
* @method Phaser.Tween#stop
|
|
* @return {Phaser.Tween} Itself.
|
|
*/
|
|
stop: function () {
|
|
|
|
this.isRunning = false;
|
|
|
|
this._onUpdateCallback = null;
|
|
|
|
this._manager.remove(this);
|
|
|
|
return this;
|
|
|
|
},
|
|
|
|
/**
|
|
* Sets a delay time before this tween will start.
|
|
*
|
|
* @method Phaser.Tween#delay
|
|
* @param {number} amount - The amount of the delay in ms.
|
|
* @return {Phaser.Tween} Itself.
|
|
*/
|
|
delay: function (amount) {
|
|
|
|
this._delayTime = amount;
|
|
return this;
|
|
|
|
},
|
|
|
|
/**
|
|
* Sets the number of times this tween will repeat.
|
|
*
|
|
* @method Phaser.Tween#repeat
|
|
* @param {number} times - How many times to repeat.
|
|
* @return {Phaser.Tween} Itself.
|
|
*/
|
|
repeat: function (times) {
|
|
|
|
this._repeat = times;
|
|
return this;
|
|
|
|
},
|
|
|
|
/**
|
|
* A tween that has yoyo set to true will run through from start to finish, then reverse from finish to start.
|
|
* Used in combination with repeat you can create endless loops.
|
|
*
|
|
* @method Phaser.Tween#yoyo
|
|
* @param {boolean} yoyo - Set to true to yoyo this tween.
|
|
* @return {Phaser.Tween} Itself.
|
|
*/
|
|
yoyo: function(yoyo) {
|
|
|
|
this._yoyo = yoyo;
|
|
return this;
|
|
|
|
},
|
|
|
|
/**
|
|
* Set easing function this tween will use, i.e. Phaser.Easing.Linear.None.
|
|
*
|
|
* @method Phaser.Tween#easing
|
|
* @param {function} easing - The easing function this tween will use, i.e. Phaser.Easing.Linear.None.
|
|
* @return {Phaser.Tween} Itself.
|
|
*/
|
|
easing: function (easing) {
|
|
|
|
this._easingFunction = easing;
|
|
return this;
|
|
|
|
},
|
|
|
|
/**
|
|
* Set interpolation function the tween will use, by default it uses Phaser.Math.linearInterpolation.
|
|
* Also available: Phaser.Math.bezierInterpolation and Phaser.Math.catmullRomInterpolation.
|
|
*
|
|
* @method Phaser.Tween#interpolation
|
|
* @param {function} interpolation - The interpolation function to use (Phaser.Math.linearInterpolation by default)
|
|
* @return {Phaser.Tween} Itself.
|
|
*/
|
|
interpolation: function (interpolation) {
|
|
|
|
this._interpolationFunction = interpolation;
|
|
return this;
|
|
|
|
},
|
|
|
|
/**
|
|
* You can chain tweens together by passing a reference to the chain function. This enables one tween to call another on completion.
|
|
* You can pass as many tweens as you like to this function, they will each be chained in sequence.
|
|
*
|
|
* @method Phaser.Tween#chain
|
|
* @return {Phaser.Tween} Itself.
|
|
*/
|
|
chain: function () {
|
|
|
|
this._chainedTweens = arguments;
|
|
return this;
|
|
|
|
},
|
|
|
|
/**
|
|
* Loop a chain of tweens
|
|
*
|
|
* Usage:
|
|
* game.add.tween(p).to({ x: 700 }, 1000, Phaser.Easing.Linear.None, true)
|
|
* .to({ y: 300 }, 1000, Phaser.Easing.Linear.None)
|
|
* .to({ x: 0 }, 1000, Phaser.Easing.Linear.None)
|
|
* .to({ y: 0 }, 1000, Phaser.Easing.Linear.None)
|
|
* .loop();
|
|
* @method Phaser.Tween#loop
|
|
* @return {Phaser.Tween} Itself.
|
|
*/
|
|
loop: function() {
|
|
|
|
this._lastChild.chain(this);
|
|
return this;
|
|
|
|
},
|
|
|
|
/**
|
|
* Sets a callback to be fired each time this tween updates. Note: callback will be called in the context of the global scope.
|
|
*
|
|
* @method Phaser.Tween#onUpdateCallback
|
|
* @param {function} callback - The callback to invoke each time this tween is updated.
|
|
* @return {Phaser.Tween} Itself.
|
|
*/
|
|
onUpdateCallback: function (callback, callbackContext) {
|
|
|
|
this._onUpdateCallback = callback;
|
|
this._onUpdateCallbackContext = callbackContext;
|
|
|
|
return this;
|
|
|
|
},
|
|
|
|
/**
|
|
* Pauses the tween.
|
|
*
|
|
* @method Phaser.Tween#pause
|
|
*/
|
|
pause: function () {
|
|
|
|
this._paused = true;
|
|
this._pausedTime = this.game.time.now;
|
|
|
|
},
|
|
|
|
/**
|
|
* Resumes a paused tween.
|
|
*
|
|
* @method Phaser.Tween#resume
|
|
*/
|
|
resume: function () {
|
|
|
|
this._paused = false;
|
|
this._startTime += (this.game.time.now - this._pausedTime);
|
|
|
|
},
|
|
|
|
/**
|
|
* Core tween update function called by the TweenManager. Does not need to be invoked directly.
|
|
*
|
|
* @method Phaser.Tween#update
|
|
* @param {number} time - A timestamp passed in by the TweenManager.
|
|
* @return {boolean} false if the tween has completed and should be deleted from the manager, otherwise true (still active).
|
|
*/
|
|
update: function (time) {
|
|
|
|
if (this.pendingDelete)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
if (this._paused || time < this._startTime)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
var property;
|
|
|
|
if (time < this._startTime)
|
|
{
|
|
return true;
|
|
}
|
|
|
|
if (this._onStartCallbackFired === false)
|
|
{
|
|
this.onStart.dispatch(this._object);
|
|
this._onStartCallbackFired = true;
|
|
}
|
|
|
|
var elapsed = (time - this._startTime) / this._duration;
|
|
elapsed = elapsed > 1 ? 1 : elapsed;
|
|
|
|
var value = this._easingFunction(elapsed);
|
|
|
|
for (property in this._valuesEnd)
|
|
{
|
|
var start = this._valuesStart[property] || 0;
|
|
var end = this._valuesEnd[property];
|
|
|
|
if (end instanceof Array)
|
|
{
|
|
this._object[property] = this._interpolationFunction(end, value);
|
|
}
|
|
else
|
|
{
|
|
// Parses relative end values with start as base (e.g.: +10, -3)
|
|
if (typeof(end) === 'string')
|
|
{
|
|
end = start + parseFloat(end, 10);
|
|
}
|
|
|
|
// protect against non numeric properties.
|
|
if (typeof(end) === 'number')
|
|
{
|
|
this._object[property] = start + ( end - start ) * value;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (this._onUpdateCallback !== null)
|
|
{
|
|
this._onUpdateCallback.call(this._onUpdateCallbackContext, this, value);
|
|
}
|
|
|
|
if (elapsed == 1)
|
|
{
|
|
if (this._repeat > 0)
|
|
{
|
|
if (isFinite(this._repeat))
|
|
{
|
|
this._repeat--;
|
|
}
|
|
|
|
// reassign starting values, restart by making startTime = now
|
|
for (property in this._valuesStartRepeat)
|
|
{
|
|
if (typeof(this._valuesEnd[property]) === 'string')
|
|
{
|
|
this._valuesStartRepeat[property] = this._valuesStartRepeat[property] + parseFloat(this._valuesEnd[property], 10);
|
|
}
|
|
|
|
if (this._yoyo)
|
|
{
|
|
var tmp = this._valuesStartRepeat[property];
|
|
this._valuesStartRepeat[property] = this._valuesEnd[property];
|
|
this._valuesEnd[property] = tmp;
|
|
this._reversed = !this._reversed;
|
|
}
|
|
|
|
this._valuesStart[property] = this._valuesStartRepeat[property];
|
|
}
|
|
|
|
this._startTime = time + this._delayTime;
|
|
|
|
this.onLoop.dispatch(this._object);
|
|
|
|
return true;
|
|
|
|
}
|
|
else
|
|
{
|
|
this.isRunning = false;
|
|
this.onComplete.dispatch(this._object);
|
|
|
|
for (var i = 0, numChainedTweens = this._chainedTweens.length; i < numChainedTweens; i ++)
|
|
{
|
|
this._chainedTweens[i].start(time);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
}
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
};
|
|
|
|
Phaser.Tween.prototype.constructor = Phaser.Tween;
|
|
</pre>
|
|
</article>
|
|
</section>
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<div class="clearfix"></div>
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<footer>
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<span class="copyright">
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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 Fri Feb 21 2014 15:36:22 GMT-0000 (GMT) using the <a href="https://github.com/terryweiss/docstrap">DocStrap template</a>.
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