/*
 *
 * Creates a loop for custom animations, paused by default
 *
 * Use:
 * var loop = new Loop();
 * loop.update = function(delta, time) {
 *     // Animate stuff
 * };
 *
 * loop.resume();
 * loop.pause();
 *
 */

define([
    'three',
], function() {

    return function() {
        var _this = this;

        _this.update = function() {};

        _this.stop = false;
        _this.clock = new THREE.Clock();
        var delta = 0;
        var time = 0;

        var loop = function() {
            if (_this.stop) return;
            requestAnimationFrame(loop);
            delta = _this.clock.getDelta();

            // Avoid jumps upon reactivation
            if (delta > 0.4) delta = 0;
            time += delta;

            _this.update(delta, time);
        };

        _this.pause = function() {
            _this.stop = true;
        };

        _this.resume = function() {
            _this.stop = false;
            requestAnimationFrame(loop);
        };
    };
});