@antv/f2/es/deps/f2-scale/src/continuous/pow.js

Charts for mobile visualization.

import { __extends } from "tslib";
import { calBase } from '../util/math';
import Continuous from './base';
/**
 * Pow 度量，处理非均匀分布
 */
var Pow = /** @class */function (_super) {
  __extends(Pow, _super);
  function Pow() {
    var _this = _super !== null && _super.apply(this, arguments) || this;
    _this.type = 'pow';
    return _this;
  }
  /**
   * @override
   */
  Pow.prototype.invert = function (value) {
    var percent = this.getInvertPercent(value);
    var exponent = this.exponent;
    var max = calBase(exponent, this.max);
    var min = calBase(exponent, this.min);
    var tmp = percent * (max - min) + min;
    var factor = tmp >= 0 ? 1 : -1;
    return Math.pow(tmp, exponent) * factor;
  };
  Pow.prototype.initCfg = function () {
    this.tickMethod = 'pow';
    this.exponent = 2;
    this.tickCount = 5;
    this.nice = true;
  };
  // 获取度量计算时，value占的定义域百分比
  Pow.prototype.getScalePercent = function (value) {
    var max = this.max;
    var min = this.min;
    if (max === min) {
      return 0;
    }
    var exponent = this.exponent;
    var percent = (calBase(exponent, value) - calBase(exponent, min)) / (calBase(exponent, max) - calBase(exponent, min));
    return percent;
  };
  return Pow;
}(Continuous);
export default Pow;