38 lines
1.3 KiB
JavaScript
38 lines
1.3 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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var util_1 = require("@antv/util");
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function snapMultiple(v, base, snapType) {
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var div;
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if (snapType === 'ceil') {
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div = Math.ceil(v / base);
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}
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else if (snapType === 'floor') {
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div = Math.floor(v / base);
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}
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else {
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div = Math.round(v / base);
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}
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return div * base;
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}
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function intervalTicks(min, max, interval) {
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// 变成 interval 的倍数
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var minTick = snapMultiple(min, interval, 'floor');
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var maxTick = snapMultiple(max, interval, 'ceil');
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// 统一小数位数
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minTick = util_1.fixedBase(minTick, interval);
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maxTick = util_1.fixedBase(maxTick, interval);
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var ticks = [];
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// https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Errors/Invalid_array_length
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var availableInterval = Math.max((maxTick - minTick) / (Math.pow(2, 12) - 1), interval);
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for (var i = minTick; i <= maxTick; i = i + availableInterval) {
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var tickValue = util_1.fixedBase(i, availableInterval); // 防止浮点数加法出现问题
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ticks.push(tickValue);
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}
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return {
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min: minTick,
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max: maxTick,
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ticks: ticks
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};
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}
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exports.default = intervalTicks;
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//# sourceMappingURL=interval.js.map
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