30 lines
932 B
JavaScript
30 lines
932 B
JavaScript
import { getLogPositiveMin, log } from '../util/math';
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/**
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* 计算 log 的 ticks，考虑 min = 0 的场景
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* @param cfg 度量的配置项
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* @returns 计算后的 ticks
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*/
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export default function calculateLogTicks(cfg) {
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var base = cfg.base, tickCount = cfg.tickCount, min = cfg.min, max = cfg.max, values = cfg.values;
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var minTick;
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var maxTick = log(base, max);
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if (min > 0) {
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minTick = Math.floor(log(base, min));
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}
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else {
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var positiveMin = getLogPositiveMin(values, base, max);
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minTick = Math.floor(log(base, positiveMin));
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}
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var count = maxTick - minTick;
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var avg = Math.ceil(count / tickCount);
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var ticks = [];
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for (var i = minTick; i < maxTick + avg; i = i + avg) {
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ticks.push(Math.pow(base, i));
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}
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if (min <= 0) {
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// 最小值 <= 0 时显示 0
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ticks.unshift(0);
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}
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return ticks;
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}
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//# sourceMappingURL=log.js.map
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