setIntervalControlling

setIntervalControlling.js

function setIntervalControlling (callback, time) {
	var startMoment = (new Date).getTime(),
		number = 0, timeOfLoop = 0, difference = 0,
		realTime = time, minStep = Math.pow(2, -4);
	
	var loop;

	__restart();

	return { stop: function () { clearInterval(loop); } };

	function __restart () {
		clearInterval(loop);
		callback();

		if (difference !== 0) {
			time += minStep * (difference > 0 ? -1 : 1);
			startMoment = (new Date).getTime();
			number = 0;
		}

		loop = setInterval(function () {
			number++;
			timeOfLoop = (new Date).getTime() - startMoment;
			difference = timeOfLoop - number * realTime;

			if (Math.abs(difference) >= realTime) __restart();
			else callback();

		}, time);
	}
}