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994 lines
21 KiB
HTML
994 lines
21 KiB
HTML
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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 2013 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 {object} _manager - Description.
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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 - Description.
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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 - Description.
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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 - Description.
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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 - Description.
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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 - Description.
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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 - Description.
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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 - Description.
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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 - Description.
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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 {Description} _startTime - Description.
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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 {Description} _easingFunction - Description.
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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 {Description} _interpolationFunction - Description.
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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 {Description} _chainedTweens - Description.
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* @private
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*/
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this._chainedTweens = [];
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/**
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* @property {Description} _onStartCallback - Description.
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* @private
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* @default
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*/
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this._onStartCallback = null;
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/**
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* @property {boolean} _onStartCallbackFired - Description.
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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 {Description} _onUpdateCallback - Description.
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* @private
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* @default null
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*/
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this._onUpdateCallback = null;
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/**
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* @property {Description} _onCompleteCallback - Description.
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* @private
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* @default null
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*/
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this._onCompleteCallback = null;
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/**
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* @property {number} _pausedTime - Description.
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* @private
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* @default
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*/
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this._pausedTime = 0;
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/**
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* @property {boolean} pendingDelete - If this tween is ready to be deleted by the TweenManager.
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* @default
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*/
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this.pendingDelete = false;
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// Set all starting values present on the target object
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for ( var field in object ) {
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this._valuesStart[ field ] = parseFloat(object[field], 10);
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}
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/**
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* @property {Phaser.Signal} onStart - Description.
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*/
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this.onStart = new Phaser.Signal();
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/**
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* @property {Phaser.Signal} onComplete - Description.
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*/
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this.onComplete = new Phaser.Signal();
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/**
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* @property {boolean} isRunning - Description.
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* @default
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*/
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this.isRunning = false;
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};
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Phaser.Tween.prototype = {
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/**
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* Configure the Tween
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*
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* @method Phaser.Tween#to
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* @param {object} properties - Properties you want to tween.
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* @param {number} duration - Duration of this tween.
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* @param {function} ease - Easing function.
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* @param {boolean} autoStart - Whether this tween will start automatically or not.
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* @param {number} delay - Delay before this tween will start, defaults to 0 (no delay).
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* @param {boolean} repeat - Should the tween automatically restart once complete? (ignores any chained tweens).
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* @param {Phaser.Tween} yoyo - Description.
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* @return {Phaser.Tween} Itself.
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*/
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to: function ( properties, duration, ease, autoStart, delay, repeat, yoyo ) {
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duration = duration || 1000;
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ease = ease || null;
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autoStart = autoStart || false;
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delay = delay || 0;
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repeat = repeat || 0;
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yoyo = yoyo || false;
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var self;
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if (this._parent)
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{
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self = this._manager.create(this._object);
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this._lastChild.chain(self);
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this._lastChild = self;
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}
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else
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{
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self = this;
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this._parent = this;
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this._lastChild = this;
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}
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self._repeat = repeat;
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self._duration = duration;
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self._valuesEnd = properties;
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if (ease !== null)
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{
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self._easingFunction = ease;
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}
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if (delay > 0)
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{
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self._delayTime = delay;
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}
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self._yoyo = yoyo;
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if (autoStart) {
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return this.start();
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} else {
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return this;
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}
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},
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/**
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* Starts the tween running. Can also be called by the autoStart parameter of Tween.to.
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*
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* @method Phaser.Tween#start
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* @param {number} time - Description.
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* @return {Phaser.Tween} Itself.
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*/
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start: function ( time ) {
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if (this.game === null || this._object === null) {
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return;
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}
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this._manager.add(this);
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this.onStart.dispatch(this._object);
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this.isRunning = true;
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this._onStartCallbackFired = false;
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this._startTime = this.game.time.now + this._delayTime;
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for ( var property in this._valuesEnd ) {
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// check if an Array was provided as property value
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if ( this._valuesEnd[ property ] instanceof Array ) {
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if ( this._valuesEnd[ property ].length === 0 ) {
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continue;
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}
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// create a local copy of the Array with the start value at the front
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this._valuesEnd[ property ] = [ this._object[ property ] ].concat( this._valuesEnd[ property ] );
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}
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this._valuesStart[ property ] = this._object[ property ];
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if ( ( this._valuesStart[ property ] instanceof Array ) === false ) {
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this._valuesStart[ property ] *= 1.0; // Ensures we're using numbers, not strings
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}
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this._valuesStartRepeat[ property ] = this._valuesStart[ property ] || 0;
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}
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return this;
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},
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/**
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* Stops the tween if running and removes it from the TweenManager. If there are any onComplete callbacks or events they are not dispatched.
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*
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* @method Phaser.Tween#stop
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* @return {Phaser.Tween} Itself.
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*/
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stop: function () {
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|
|
this._manager.remove(this);
|
|
this.isRunning = false;
|
|
|
|
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.
|
|
*
|
|
* @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 when the tween starts. Note: callback will be called in the context of the global scope.
|
|
*
|
|
* @method Phaser.Tween#onStartCallback
|
|
* @param {function} callback - The callback to invoke on start.
|
|
* @return {Phaser.Tween} Itself.
|
|
*/
|
|
onStartCallback: function ( callback ) {
|
|
|
|
this._onStartCallback = callback;
|
|
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 ) {
|
|
|
|
this._onUpdateCallback = callback;
|
|
return this;
|
|
|
|
},
|
|
|
|
/**
|
|
* Sets a callback to be fired when the tween completes. Note: callback will be called in the context of the global scope.
|
|
*
|
|
* @method Phaser.Tween#onCompleteCallback
|
|
* @param {function} callback - The callback to invoke on completion.
|
|
* @return {Phaser.Tween} Itself.
|
|
*/
|
|
onCompleteCallback: function ( callback ) {
|
|
|
|
this._onCompleteCallback = callback;
|
|
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 ) {
|
|
|
|
if ( this._onStartCallback !== null ) {
|
|
|
|
this._onStartCallback.call( 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._object, 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.onComplete.dispatch(this._object);
|
|
|
|
if ( this._onCompleteCallback !== null ) {
|
|
this._onCompleteCallback.call( this._object );
|
|
}
|
|
|
|
return true;
|
|
|
|
} else {
|
|
|
|
this.onComplete.dispatch(this._object);
|
|
|
|
if ( this._onCompleteCallback !== null ) {
|
|
this._onCompleteCallback.call( this._object );
|
|
}
|
|
|
|
for ( var i = 0, numChainedTweens = this._chainedTweens.length; i < numChainedTweens; i ++ ) {
|
|
|
|
this._chainedTweens[ i ].start( time );
|
|
|
|
}
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
};
|
|
</pre>
|
|
</article>
|
|
</section>
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</div>
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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 © 2012-2013 Photon Storm Ltd.
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</span>
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<br />
|
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|
|
<span class="jsdoc-message">
|
|
Documentation generated by <a href="https://github.com/jsdoc3/jsdoc">JSDoc 3.2.0-dev</a>
|
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on Wed Oct 23 2013 13:51:58 GMT+0100 (BST) using the <a href="https://github.com/terryweiss/docstrap">DocStrap template</a>.
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</span>
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