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36 lines
1.1 KiB
36 lines
1.1 KiB
4 months ago
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// 参考 d3-ticks nice 的实现
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// https://github.com/d3/d3-scale
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import { tickIncrement } from './ticks';
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export const d3LinearNice = (min, max, count = 5) => {
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const d = [min, max];
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let i0 = 0;
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let i1 = d.length - 1;
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let start = d[i0];
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let stop = d[i1];
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let step;
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if (stop < start) {
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[start, stop] = [stop, start];
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[i0, i1] = [i1, i0];
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}
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step = tickIncrement(start, stop, count);
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if (step > 0) {
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start = Math.floor(start / step) * step;
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stop = Math.ceil(stop / step) * step;
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step = tickIncrement(start, stop, count);
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}
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else if (step < 0) {
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start = Math.ceil(start * step) / step;
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stop = Math.floor(stop * step) / step;
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step = tickIncrement(start, stop, count);
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}
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if (step > 0) {
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d[i0] = Math.floor(start / step) * step;
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d[i1] = Math.ceil(stop / step) * step;
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}
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else if (step < 0) {
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d[i0] = Math.ceil(start * step) / step;
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d[i1] = Math.floor(stop * step) / step;
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}
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return d;
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};
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//# sourceMappingURL=d3-linear-nice.js.map
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