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

Charts for mobile visualization.

import { calBase } from '../util/math';
import pretty from '../util/pretty';
/**
 * 计算 Pow 的 ticks
 * @param cfg 度量的配置项
 * @returns 计算后的 ticks
 */
export default function calculatePowTicks(cfg) {
  var exponent = cfg.exponent,
    tickCount = cfg.tickCount;
  var max = Math.ceil(calBase(exponent, cfg.max));
  var min = Math.floor(calBase(exponent, cfg.min));
  var ticks = pretty(min, max, tickCount).ticks;
  return ticks.map(function (tick) {
    var factor = tick >= 0 ? 1 : -1;
    return Math.pow(tick, exponent) * factor;
  });
}