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54 lines
1.6 KiB
54 lines
1.6 KiB
4 months ago
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.d3Log = void 0;
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const d3_ticks_1 = require("./d3-ticks");
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const utils_1 = require("../utils");
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const d3Log = (a, b, n, base = 10) => {
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const shouldReflect = a < 0;
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const pow = (0, utils_1.pows)(base, shouldReflect);
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const log = (0, utils_1.logs)(base, shouldReflect);
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const r = b < a;
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const min = r ? b : a;
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const max = r ? a : b;
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let i = log(min);
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let j = log(max);
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let ticks = [];
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// 如果 base 是整数
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if (!(base % 1) && j - i < n) {
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i = Math.floor(i);
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j = Math.ceil(j);
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if (shouldReflect) {
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for (; i <= j; i += 1) {
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const p = pow(i);
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for (let k = base - 1; k >= 1; k -= 1) {
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const t = p * k;
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if (t > max)
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break;
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if (t >= min)
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ticks.push(t);
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}
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}
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}
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else {
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for (; i <= j; i += 1) {
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const p = pow(i);
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for (let k = 1; k < base; k += 1) {
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const t = p * k;
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if (t > max)
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break;
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if (t >= min)
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ticks.push(t);
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}
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}
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}
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if (ticks.length * 2 < n)
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ticks = (0, d3_ticks_1.d3Ticks)(min, max, n);
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}
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else {
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const count = n === -1 ? j - i : Math.min(j - i, n);
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ticks = (0, d3_ticks_1.d3Ticks)(i, j, count).map(pow);
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}
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return r ? ticks.reverse() : ticks;
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};
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exports.d3Log = d3Log;
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//# sourceMappingURL=d3-log.js.map
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