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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>JSDoc: Source: animation/Animation.js</title>
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<h1 class="page-title">Source: animation/Animation.js</h1>
<section>
<article>
<pre class="prettyprint source linenums"><code>//------------------------------------------------------------------------------
// Constructor scope
//------------------------------------------------------------------------------
/**
* Creates a new instance of the Animation class.
*
* @constructor
*
* @param {string} name The name of the animation; used as a unique ID.
* @param {Array} frames List of which frames are included in the animation and in which order.
* @param {number} [framerate=0] Playback speed specified in frames per second.
* @param {boolean} [looped=false] Whether or not to loop the animation sequence.
*
* @class
* @classdesc
*
* The Animation class represents a keyframe based animation sequence.
*/
rune.animation.Animation = function(name, frames, framerate, looped) {
//--------------------------------------------------------------------------
// Public properties
//--------------------------------------------------------------------------
/**
* List of animation key frames. The list dictates which frames are
* included in the animation and in which order the frames are played.
*
* @type {Array}
*/
this.frames = frames || [];
/**
* Whether (true) or not (false) to loop the animation sequence.
*
* @type {boolean}
*/
this.looped = looped || false;
//--------------------------------------------------------------------------
// Private properties
//--------------------------------------------------------------------------
/**
* Delay between keyframes.
*
* @type {number}
* @private
*/
this.m_delay = parseInt(framerate, 10) > 0 ? parseInt((1 / framerate) * 1000, 10) : 0;
/**
* Elapsed time.
*
* @type {number}
* @private
*/
this.m_elapsed = 0;
/**
* Index of current keyframe.
*
* @type {number}
* @private
*/
this.m_index = 0;
/**
* The name of the animation.
*
* @type {string}
* @private
*/
this.m_name = name || "unnamed";
/**
* Whether the animation is paused or not.
*
* @type {boolean}
* @private
*/
this.m_paused = false;
//--------------------------------------------------------------------------
// Constructor call
//--------------------------------------------------------------------------
/**
* Invokes secondary class constructor.
*/
this.m_construct();
};
//------------------------------------------------------------------------------
// Public getter and setter methods
//------------------------------------------------------------------------------
/**
* Describes the current frame based on the animation's atlas texture.
*
* @member {number} atlasIndex
* @memberof rune.animation.Animation
* @instance
* @readonly
*/
Object.defineProperty(rune.animation.Animation.prototype, "atlasIndex", {
/**
* @this rune.animation.Animation
* @ignore
*/
get : function() {
return this.frames[this['index']];
}
});
/**
* The display time (in milliseconds) of each keyframe.
*
* @member {number} delay
* @memberof rune.animation.Animation
* @instance
*/
Object.defineProperty(rune.animation.Animation.prototype, "delay", {
/**
* @this rune.animation.Animation
* @ignore
*/
get : function() {
return this.m_delay;
},
/**
* @this rune.animation.Animation
* @ignore
*/
set : function(value) {
this.m_delay = rune.util.Math.clamp(parseInt(value, 10), 0, Number.MAX_SAFE_INTEGER);
}
});
/**
* The total length of the animation specified in milliseconds.
*
* @member {number} duration
* @memberof rune.animation.Animation
* @instance
* @readonly
*/
Object.defineProperty(rune.animation.Animation.prototype, "duration", {
/**
* @this rune.animation.Animation
* @ignore
*/
get : function() {
return this['delay'] * this.frames.length;
}
});
/**
* Index of current keyframe within current animation sequence.
*
* @member {number} frameIndex
* @memberof rune.animation.Animation
* @instance
* @readonly
*/
Object.defineProperty(rune.animation.Animation.prototype, "frameIndex", {
/**
* @this rune.animation.Animation
* @ignore
*/
get : function() {
return this['index'];
}
});
/**
* Playback speed specified in frames per second.
*
* @member {number} framerate
* @memberof rune.animation.Animation
* @instance
*/
Object.defineProperty(rune.animation.Animation.prototype, "framerate", {
/**
* @this rune.animation.Animation
* @ignore
*/
get : function() {
return (this['delay'] > 0) ? parseInt(1000 / this['delay'], 10) : 0;
},
/**
* @this rune.animation.Animation
* @ignore
*/
set : function(value) {
this['delay'] = parseInt((1 / value) * 1000, 10);
}
});
/**
* Length of animation, indicated in number of frames.
*
* @member {number} length
* @memberof rune.animation.Animation
* @instance
* @readonly
*/
Object.defineProperty(rune.animation.Animation.prototype, "length", {
/**
* @this rune.animation.Animation
* @ignore
*/
get : function() {
return this.frames.length;
}
});
/**
* The name of the animation. This value is used as a unique ID and thus there
* can be no two animations with the same name.
*
* @member {string} name
* @memberof rune.animation.Animation
* @instance
* @readonly
*/
Object.defineProperty(rune.animation.Animation.prototype, "name", {
/**
* @this rune.animation.Animation
* @ignore
*/
get : function() {
return this.m_name;
}
});
/**
* A Boolean value that indicates whether an animation is currently playing.
*
* @member {boolean} isPlaying
* @memberof rune.animation.Animation
* @instance
* @readonly
*/
Object.defineProperty(rune.animation.Animation.prototype, "isPlaying", {
/**
* @this rune.animation.Animation
* @ignore
*/
get : function() {
return !this.m_paused;
}
});
/**
* Refers to a subsystem that enables the inclusion of scripts in frames.
* Use this reference to add, or delete, scripts for the current animation.
*
* @member {rune.animation.AnimationScripts} scripts
* @memberof rune.animation.Animation
* @instance
* @readonly
*/
Object.defineProperty(rune.animation.Animation.prototype, "scripts", {
/**
* @this rune.animation.Animation
* @ignore
*/
get : function() {
return this.m_scripts;
}
});
//------------------------------------------------------------------------------
// Private getter and setter methods
//------------------------------------------------------------------------------
/**
* Current frame index.
*
* @member {number} index
* @memberof rune.animation.Animation
* @instance
* @private
*/
Object.defineProperty(rune.animation.Animation.prototype, "index", {
/**
* @this rune.animation.Animation
* @ignore
*/
get : function() {
return this.m_index;
},
/**
* @this rune.animation.Animation
* @ignore
*/
set : function(value) {
if (this.looped === true) {
this.m_index = rune.util.Math.wrap(value, 0, this.frames.length - 1);
} else {
this.m_index = rune.util.Math.clamp(value, 0, this.frames.length - 1);
}
}
});
//------------------------------------------------------------------------------
// Public prototype methods (API)
//------------------------------------------------------------------------------
/**
* Jumps to a specific frame within the animation sequence.
*
* @param {number} frame Frame to go to.
*
* @returns {undefined}
*/
rune.animation.Animation.prototype.goto = function(frame) {
if (frame > -1) {
this['index'] = frame;
}
this.m_elapsed = 0;
};
/**
* Jumps to a specific frame within the animation sequence and starts playback
* from this location.
*
* @param {number} frame Frame to go to.
*
* @returns {undefined}
*/
rune.animation.Animation.prototype.gotoAndPlay = function(frame) {
this.goto(frame);
this.play();
};
/**
* Jumps to a specific frame within the animation sequence and stops playback
* on that frame.
*
* @param {number} frame Frame to go to.
*
* @returns {undefined}
*/
rune.animation.Animation.prototype.gotoAndStop = function(frame) {
this.goto(frame);
this.stop();
};
/**
* Sends the playhead to the next frame.
*
* @returns {undefined}
*/
rune.animation.Animation.prototype.gotoNextFrame = function() {
this['index']++;
this.m_elapsed = 0;
};
/**
* Sends the playhead to the previous frame.
*
* @returns {undefined}
*/
rune.animation.Animation.prototype.gotoPreviousFrame = function() {
this['index']--;
this.m_elapsed = 0;
};
/**
* Sends the playhead to a random frame.
*
* @returns {undefined}
*/
rune.animation.Animation.prototype.gotoRandomFrame = function() {
this['index'] = rune.util.Math.randomInt(0, this.frames.length - 1);
this.m_elapsed = 0;
};
/**
* Moves the playhead in the timeline of the animation.
*
* @returns {undefined}
*/
rune.animation.Animation.prototype.play = function() {
this.m_paused = false;
};
/**
* Stops the playhead in the animation.
*
* @returns {undefined}
*/
rune.animation.Animation.prototype.stop = function() {
this.m_paused = true;
};
//------------------------------------------------------------------------------
// Internal prototype methods
//------------------------------------------------------------------------------
/**
* Clears memory allocated by this instance.
*
* @returns {undefined}
* @package
* @ignore
*/
rune.animation.Animation.prototype.dispose = function() {
this.stop();
this.m_disposeScripts();
};
/**
* Updates the playback of the animation.
*
* @param {number} step Current time step.
*
* @returns {undefined}
* @package
* @ignore
*/
rune.animation.Animation.prototype.update = function(step) {
if (this.m_delay > 0 && this.m_paused == false) {
this.m_elapsed += step;
while (this.m_elapsed > this.m_delay) {
this.m_elapsed -= this.m_delay;
this['index']++;
this.m_execScript();
}
}
};
//------------------------------------------------------------------------------
// Protected prototype methods
//------------------------------------------------------------------------------
/**
* The class constructor.
*
* @returns {undefined}
* @protected
* @ignore
*/
rune.animation.Animation.prototype.m_construct = function() {
this.m_constructScripts();
};
//------------------------------------------------------------------------------
// Private prototype methods
//------------------------------------------------------------------------------
/**
* Creates the script subsystem.
*
* @returns {undefined}
* @private
*/
rune.animation.Animation.prototype.m_constructScripts = function() {
this.m_disposeScripts();
if (this.m_scripts == null) {
this.m_scripts = new rune.animation.AnimationScripts();
} else throw new Error();
};
/**
* Destroy the subsystem for scripts.
*
* @returns {undefined}
* @private
*/
rune.animation.Animation.prototype.m_disposeScripts = function() {
if (this.m_scripts instanceof rune.animation.AnimationScripts) {
this.m_scripts.dispose();
this.m_scripts = null;
}
};
/**
* Executes a script within the subsystem.
*
* @returns {undefined}
* @private
*/
rune.animation.Animation.prototype.m_execScript = function() {
if (this.m_scripts != null) {
this.m_scripts.exec(this['index']);
}
};</code></pre>
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