text: /**
   * 那个节点的动画，从哪里到哪里
   * @param id
   * @param beginX
   * @param beginY
   * @param endX
   * @param endY
   * @constructor
   */
  function SingleAnimation(id, beginX, beginY, endX, endY) {
      this.id = id;
      this.beginX = beginX;
      this.beginY = beginY;
      this.endX = endX;
      this.endY = endY;
  
      this.toString = function () {
          return this.id + " " + this.beginX + " " + this.beginY + " " + this.endX + " " + this.endY;
      }
  }