@antv/f2/es/deps/f2-adjust/src/adjusts/jitter.js

Charts for mobile visualization.

import { __extends } from "tslib";
import { clone, flatten, each } from '@antv/util';
import { GAP } from '../constant';
import Adjust from './adjust';
function randomNumber(min, max) {
  return (max - min) * Math.random() + min;
}
var Jitter = /** @class */function (_super) {
  __extends(Jitter, _super);
  function Jitter() {
    return _super !== null && _super.apply(this, arguments) || this;
  }
  Jitter.prototype.process = function (groupDataArray) {
    var groupedDataArray = clone(groupDataArray);
    // 之前分组之后的数据，然后有合并回去（和分组前可以理解成是一样的）
    var mergeData = flatten(groupedDataArray);
    // 返回值
    this.adjustData(groupedDataArray, mergeData);
    return groupedDataArray;
  };
  /**
   * 当前数据分组（index）中，按照维度 dim 进行 jitter 调整
   * @param dim
   * @param values
   * @param dataArray
   */
  Jitter.prototype.adjustDim = function (dim, values, dataArray) {
    var _this = this;
    // 在每一个分组中，将数据再按照 dim 分组，用于散列
    var groupDataArray = this.groupData(dataArray, dim);
    return each(groupDataArray, function (data, dimValue) {
      return _this.adjustGroup(data, dim, parseFloat(dimValue), values);
    });
  };
  // 随机出来的字段值
  Jitter.prototype.getAdjustOffset = function (range) {
    var pre = range.pre,
      next = range.next;
    // 随机的范围
    var margin = (next - pre) * GAP;
    return randomNumber(pre + margin, next - margin);
  };
  // adjust group data
  Jitter.prototype.adjustGroup = function (group, dim, dimValue, values) {
    var _this = this;
    // 调整范围
    var range = this.getAdjustRange(dim, dimValue, values);
    each(group, function (data) {
      data[dim] = _this.getAdjustOffset(range); // 获取调整的位置
    });

    return group;
  };
  return Jitter;
}(Adjust);
export default Jitter;