text: var bezier = (function(){
  	var point = function(x, y, draggable, is_control) {
  		var bp = {};
  		bp.x = x;
  		bp.y = y;
  		bp.draggable = draggable;
  		bp.is_control = is_control;
  		return bp;
  	}
  
  	var curve = function(points, ctr_points) {
  		var b = {};
  		b.points = points;
  		b.ctr_points = ctr_points;
  		return b;
  	};
  	return {point: point, curve: curve};
  }());