Function animateScroll

assets/js/rotating_nav_anim.js:158–169

(timestamp)

      currentTime = null;
      
  var animateScroll = function(timestamp){
  	if (!currentTime) currentTime = timestamp;        
    var progress = timestamp - currentTime;
    if(progress > duration) progress = duration;
    var val = Math.easeInOutQuad(progress, start, final-start, duration);
    window.scrollTo(0, val);
    if(progress < duration) {
        window.requestAnimationFrame(animateScroll);
    } else {
      cb && cb();
    }
  };

  window.requestAnimationFrame(animateScroll);
};