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<!DOCTYPE html>
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<title>Phaser Source: animation/Animation.js</title>
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<h1 class="page-title">Source: animation/Animation.js</h1>
<section>
<article>
<pre class="sunlight-highlight-javascript linenums">/**
* @author Richard Davey <rich@photonstorm.com>
* @copyright 2014 Photon Storm Ltd.
* @license {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
*/
/**
* An Animation instance contains a single animation and the controls to play it.
* It is created by the AnimationManager, consists of Animation.Frame objects and belongs to a single Game Object such as a Sprite.
*
* @class Phaser.Animation
* @constructor
* @param {Phaser.Game} game - A reference to the currently running game.
* @param {Phaser.Sprite} parent - A reference to the owner of this Animation.
* @param {string} name - The unique name for this animation, used in playback commands.
* @param {Phaser.FrameData} frameData - The FrameData object that contains all frames used by this Animation.
* @param {(Array.<number>|Array.<string>)} frames - An array of numbers or strings indicating which frames to play in which order.
* @param {number} delay - The time between each frame of the animation, given in ms.
* @param {boolean} loop - Should this animation loop when it reaches the end or play through once.
*/
Phaser.Animation = function (game, parent, name, frameData, frames, delay, loop) {
/**
* @property {Phaser.Game} game - A reference to the currently running Game.
*/
this.game = game;
/**
* @property {Phaser.Sprite} _parent - A reference to the parent Sprite that owns this Animation.
* @private
*/
this._parent = parent;
/**
* @property {Phaser.FrameData} _frameData - The FrameData the Animation uses.
* @private
*/
this._frameData = frameData;
/**
* @property {string} name - The user defined name given to this Animation.
*/
this.name = name;
/**
* @property {array} _frames
* @private
*/
this._frames = [];
this._frames = this._frames.concat(frames);
/**
* @property {number} delay - The delay in ms between each frame of the Animation.
*/
this.delay = 1000 / delay;
/**
* @property {boolean} loop - The loop state of the Animation.
*/
this.loop = loop;
/**
* @property {number} loopCount - The number of times the animation has looped since it was last started.
*/
this.loopCount = 0;
/**
* @property {boolean} killOnComplete - Should the parent of this Animation be killed when the animation completes?
* @default
*/
this.killOnComplete = false;
/**
* @property {boolean} isFinished - The finished state of the Animation. Set to true once playback completes, false during playback.
* @default
*/
this.isFinished = false;
/**
* @property {boolean} isPlaying - The playing state of the Animation. Set to false once playback completes, true during playback.
* @default
*/
this.isPlaying = false;
/**
* @property {boolean} isPaused - The paused state of the Animation.
* @default
*/
this.isPaused = false;
/**
* @property {boolean} _pauseStartTime - The time the animation paused.
* @private
* @default
*/
this._pauseStartTime = 0;
/**
* @property {number} _frameIndex
* @private
* @default
*/
this._frameIndex = 0;
/**
* @property {number} _frameDiff
* @private
* @default
*/
this._frameDiff = 0;
/**
* @property {number} _frameSkip
* @private
* @default
*/
this._frameSkip = 1;
/**
* @property {Phaser.Frame} currentFrame - The currently displayed frame of the Animation.
*/
this.currentFrame = this._frameData.getFrame(this._frames[this._frameIndex]);
/**
* @property {Phaser.Signal} onStart - This event is dispatched when this Animation starts playback.
*/
this.onStart = new Phaser.Signal();
/**
* @property {Phaser.Signal} onComplete - This event is dispatched when this Animation completes playback. If the animation is set to loop this is never fired, listen for onAnimationLoop instead.
*/
this.onComplete = new Phaser.Signal();
/**
* @property {Phaser.Signal} onLoop - This event is dispatched when this Animation loops.
*/
this.onLoop = new Phaser.Signal();
// Set-up some event listeners
this.game.onPause.add(this.onPause, this);
this.game.onResume.add(this.onResume, this);
};
Phaser.Animation.prototype = {
/**
* Plays this animation.
*
* @method Phaser.Animation#play
* @param {number} [frameRate=null] - The framerate to play the animation at. The speed is given in frames per second. If not provided the previously set frameRate of the Animation is used.
* @param {boolean} [loop=false] - Should the animation be looped after playback. If not provided the previously set loop value of the Animation is used.
* @param {boolean} [killOnComplete=false] - If set to true when the animation completes (only happens if loop=false) the parent Sprite will be killed.
* @return {Phaser.Animation} - A reference to this Animation instance.
*/
play: function (frameRate, loop, killOnComplete) {
if (typeof frameRate === 'number')
{
// If they set a new frame rate then use it, otherwise use the one set on creation
this.delay = 1000 / frameRate;
}
if (typeof loop === 'boolean')
{
// If they set a new loop value then use it, otherwise use the one set on creation
this.loop = loop;
}
if (typeof killOnComplete !== 'undefined')
{
// Remove the parent sprite once the animation has finished?
this.killOnComplete = killOnComplete;
}
this.isPlaying = true;
this.isFinished = false;
this.paused = false;
this.loopCount = 0;
this._timeLastFrame = this.game.time.now;
this._timeNextFrame = this.game.time.now + this.delay;
this._frameIndex = 0;
this.currentFrame = this._frameData.getFrame(this._frames[this._frameIndex]);
this._parent.setFrame(this.currentFrame);
// TODO: Double check if required
if (this._parent.__tilePattern)
{
this._parent.__tilePattern = false;
this._parent.tilingTexture = false;
}
this._parent.events.onAnimationStart.dispatch(this._parent, this);
this.onStart.dispatch(this._parent, this);
return this;
},
/**
* Sets this animation back to the first frame and restarts the animation.
*
* @method Phaser.Animation#restart
*/
restart: function () {
this.isPlaying = true;
this.isFinished = false;
this.paused = false;
this.loopCount = 0;
this._timeLastFrame = this.game.time.now;
this._timeNextFrame = this.game.time.now + this.delay;
this._frameIndex = 0;
this.currentFrame = this._frameData.getFrame(this._frames[this._frameIndex]);
this._parent.setFrame(this.currentFrame);
this.onStart.dispatch(this._parent, this);
},
/**
* Sets this animations playback to a given frame with the given ID.
*
* @method Phaser.Animation#setFrame
* @param {string|number} [frameId] - The identifier of the frame to set. Can be the name of the frame, the sprite index of the frame, or the animation-local frame index.
* @param {boolean} [useLocalFrameIndex=false] - If you provide a number for frameId, should it use the numeric indexes of the frameData, or the 0-indexed frame index local to the animation.
*/
setFrame: function(frameId, useLocalFrameIndex) {
var frameIndex;
if (typeof useLocalFrameIndex === 'undefined')
{
useLocalFrameIndex = false;
}
// Find the index to the desired frame.
if (typeof frameId === "string")
{
for (var i = 0; i < this._frames.length; i++)
{
if (this._frameData.getFrame(this._frames[i]).name === frameId)
{
frameIndex = i;
}
}
}
else if (typeof frameId === "number")
{
if (useLocalFrameIndex)
{
frameIndex = frameId;
}
else
{
for (var i = 0; i < this._frames.length; i++)
{
if (this.frames[i] === frameIndex)
{
frameIndex = i;
}
}
}
}
if (frameIndex)
{
// Set the current frame index to the found index. Subtract 1 so that it animates to the desired frame on update.
this._frameIndex = frameIndex - 1;
// Make the animation update at next update
this._timeNextFrame = this.game.time.now;
this.update();
}
},
/**
* Stops playback of this animation and set it to a finished state. If a resetFrame is provided it will stop playback and set frame to the first in the animation.
* If `dispatchComplete` is true it will dispatch the complete events, otherwise they'll be ignored.
*
* @method Phaser.Animation#stop
* @param {boolean} [resetFrame=false] - If true after the animation stops the currentFrame value will be set to the first frame in this animation.
* @param {boolean} [dispatchComplete=false] - Dispatch the Animation.onComplete and parent.onAnimationComplete events?
*/
stop: function (resetFrame, dispatchComplete) {
if (typeof resetFrame === 'undefined') { resetFrame = false; }
if (typeof dispatchComplete === 'undefined') { dispatchComplete = false; }
this.isPlaying = false;
this.isFinished = true;
this.paused = false;
if (resetFrame)
{
this.currentFrame = this._frameData.getFrame(this._frames[0]);
this._parent.setFrame(this.currentFrame);
}
if (dispatchComplete)
{
this._parent.events.onAnimationComplete.dispatch(this._parent, this);
this.onComplete.dispatch(this._parent, this);
}
},
/**
* Called when the Game enters a paused state.
*
* @method Phaser.Animation#onPause
*/
onPause: function () {
if (this.isPlaying)
{
this._frameDiff = this._timeNextFrame - this.game.time.now;
}
},
/**
* Called when the Game resumes from a paused state.
*
* @method Phaser.Animation#onResume
*/
onResume: function () {
if (this.isPlaying)
{
this._timeNextFrame = this.game.time.now + this._frameDiff;
}
},
/**
* Updates this animation. Called automatically by the AnimationManager.
*
* @method Phaser.Animation#update
*/
update: function () {
if (this.isPaused)
{
return false;
}
if (this.isPlaying && this.game.time.now >= this._timeNextFrame)
{
this._frameSkip = 1;
// Lagging?
this._frameDiff = this.game.time.now - this._timeNextFrame;
this._timeLastFrame = this.game.time.now;
if (this._frameDiff > this.delay)
{
// We need to skip a frame, work out how many
this._frameSkip = Math.floor(this._frameDiff / this.delay);
this._frameDiff -= (this._frameSkip * this.delay);
}
// And what's left now?
this._timeNextFrame = this.game.time.now + (this.delay - this._frameDiff);
this._frameIndex += this._frameSkip;
if (this._frameIndex >= this._frames.length)
{
if (this.loop)
{
this._frameIndex %= this._frames.length;
this.currentFrame = this._frameData.getFrame(this._frames[this._frameIndex]);
this.loopCount++;
this._parent.events.onAnimationLoop.dispatch(this._parent, this);
this.onLoop.dispatch(this._parent, this);
}
else
{
this.complete();
}
}
this.currentFrame = this._frameData.getFrame(this._frames[this._frameIndex]);
if (this.currentFrame)
{
this._parent.setFrame(this.currentFrame);
if (this._parent.__tilePattern)
{
this._parent.__tilePattern = false;
this._parent.tilingTexture = false;
}
}
return true;
}
return false;
},
/**
* Advances by the given number of frames in the Animation, taking the loop value into consideration.
*
* @method Phaser.Animation#next
* @param {number} [quantity=1] - The number of frames to advance.
*/
next: function (quantity) {
if (typeof quantity === 'undefined') { quantity = 1; }
var frame = this._frameIndex + quantity;
if (frame >= this._frames.length)
{
if (this.loop)
{
frame %= this._frames.length;
}
else
{
frame = this._frames.length - 1;
}
}
if (frame !== this._frameIndex)
{
this._frameIndex = frame;
this.currentFrame = this._frameData.getFrame(this._frames[this._frameIndex]);
if (this.currentFrame)
{
this._parent.setFrame(this.currentFrame);
if (this._parent.__tilePattern)
{
this._parent.__tilePattern = false;
this._parent.tilingTexture = false;
}
}
}
},
/**
* Moves backwards the given number of frames in the Animation, taking the loop value into consideration.
*
* @method Phaser.Animation#previous
* @param {number} [quantity=1] - The number of frames to move back.
*/
previous: function (quantity) {
if (typeof quantity === 'undefined') { quantity = 1; }
var frame = this._frameIndex - quantity;
if (frame < 0)
{
if (this.loop)
{
frame = this._frames.length + frame;
}
else