code: function parsePath(path, islineToArc) {
      var coord = this._coord;
      path = GPath.parsePathString(path);
      if (coord.isPolar && islineToArc !== false) {
        path = PathUtil.convertPolarPath(coord, path);
      } else {
        path = PathUtil.convertNormalPath(coord, path);
      }
      return path;
    }
docs: 0～1 path 转 画布 path
  @param  {path} path 路径
  @param  {Boolean} islineToArc 是否转换成圆弧
  @return {path} path 转换到画布坐标的path