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TimeLine //JavaScript Class

DZone's Guide to

TimeLine //JavaScript Class

·
Free Resource


Simulates the Adobe Flash timeline. You define the amount of frames, the speed in fps (frames per second) and, at each frame passage an event is called, useful for animations.

[UPDATED CODE AND HELP CAN BE FOUND HERE]




//+ Jonas Raoni Soares Silva
//@ http://jsfromhell.com/classes/timeline [v1.0]

TimeLine = function(fps, f){
	this.fps = fps, this.frames = f;
};
with({o: TimeLine, $: TimeLine.prototype}){
	o.timers = [];
	$.running = !!($.current = +(o.timer = $.time = null));
	o.run = function(){
		var o = this;
		o.timer || (o.timer = setInterval(function(){
			for(var h, d = +(new Date), t = o.timers, i = t.length; i--;){
				(!t[i].running || ((d - t[i].time) / (1e3 / t[i].fps) > t[i].current + 1 &&
				t[i].onframe(++t[i].current), t[i].current >= t[i].frames)) &&
				(h = t.splice(i, 1)[0], h.stop(1));
			}
		}, 1));
	};
	$.start = function(c){
		var o = this, t = TimeLine;
		if(o.running) return;
		o.running = true, o.current = c || 0;
		o.time = new Date, o.onstart && o.onstart();
		if(!o.onframe || o.frames <= 0 || o.fps <= 0)
			return o.stop(1);
		t.timers.push(this), t.run();
	};
	$.stop = function(){
		var o = this;
		o.running = false;
		if(!TimeLine.timers.length)
			TimeLine.timer = clearInterval(TimeLine.timer), null;
		arguments.length && o.onstop && o.onstop();
	};
}


Example




  
25 fps
12 fps
TimeLine working together with the ease in quad function.
Topics:

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