64 lines
1.4 KiB
JavaScript
64 lines
1.4 KiB
JavaScript
import continuous from "./continuous.js";
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import {initRange} from "./init.js";
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import {linearish} from "./linear.js";
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import number from "./number.js";
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function square(x) {
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return Math.sign(x) * x * x;
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}
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function unsquare(x) {
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return Math.sign(x) * Math.sqrt(Math.abs(x));
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}
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export default function radial() {
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var squared = continuous(),
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range = [0, 1],
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round = false,
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unknown;
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function scale(x) {
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var y = unsquare(squared(x));
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return isNaN(y) ? unknown : round ? Math.round(y) : y;
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}
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scale.invert = function(y) {
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return squared.invert(square(y));
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};
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scale.domain = function(_) {
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return arguments.length ? (squared.domain(_), scale) : squared.domain();
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};
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scale.range = function(_) {
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return arguments.length ? (squared.range((range = Array.from(_, number)).map(square)), scale) : range.slice();
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};
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scale.rangeRound = function(_) {
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return scale.range(_).round(true);
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};
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scale.round = function(_) {
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return arguments.length ? (round = !!_, scale) : round;
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};
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scale.clamp = function(_) {
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return arguments.length ? (squared.clamp(_), scale) : squared.clamp();
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};
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scale.unknown = function(_) {
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return arguments.length ? (unknown = _, scale) : unknown;
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};
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scale.copy = function() {
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return radial(squared.domain(), range)
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.round(round)
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.clamp(squared.clamp())
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.unknown(unknown);
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};
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initRange.apply(scale, arguments);
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return linearish(scale);
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}
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