text: export function pack(...args) {
  	let result = {};
  
  	for (let i = 0, l = args.length; i < l; i++) {
  		let obj = args[i];
  
  		if (obj) {
  			for (let key in obj) {
  				if (obj.hasOwnProperty(key)) {
  					result[key] = obj[key];
  				}
  			}
  		}
  	}
  
  	return result;
  }
  
  export function offsetVector(vector, x, y) {
  	switch (vector.type) {
  		case 'ellipse':
  		case 'rect':
  			vector.x += x;
  			vector.y += y;
  			break;
  		case 'line':
  			vector.x1 += x;
  			vector.x2 += x;
  			vector.y1 += y;
  			vector.y2 += y;
  			break;
  		case 'polyline':
  			for (let i = 0, l = vector.points.length; i < l; i++) {
  				vector.points[i].x += x;
  				vector.points[i].y += y;
  			}
  			break;
  	}
  }
  