gistfile1.js

$this.bind('touchmove', function(event){
						var touchDiffY = event.originalEvent.changedTouches[0].screenY - data.startY;

						var x = data.startX - event.originalEvent.touches[0].pageX;
						var y = data.startY = touchDiffY;
						var r = Math.atan2(y,x);

						var angle = Math.round(r*180/Math.PI);

						//angle = 360 - Math.abs(angle);
						

						if(angle < 0 )
							angle = 360 - Math.abs(angle);

						console.log(angle);

						if((angle > 45) && (angle < 135)){
							
						}
						else if((angle < 45) && (angle > 135)){

						}
						else {
							event.preventDefault();
						}
						
						data.distanceX =  event.originalEvent.touches[0].pageX - data.startX;
						$wrapper.css({'left':(data.distanceX+data.newPos)+'px'});
						//console.log(data.newPos);
					});