107 lines
2.7 KiB
JavaScript
107 lines
2.7 KiB
JavaScript
import {interpolate, interpolateRound} from "d3-interpolate";
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import {identity} from "./continuous.js";
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import {initInterpolator} from "./init.js";
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import {linearish} from "./linear.js";
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import {loggish} from "./log.js";
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import {symlogish} from "./symlog.js";
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import {powish} from "./pow.js";
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function transformer() {
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var x0 = 0,
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x1 = 1,
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t0,
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t1,
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k10,
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transform,
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interpolator = identity,
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clamp = false,
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unknown;
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function scale(x) {
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return x == null || isNaN(x = +x) ? unknown : interpolator(k10 === 0 ? 0.5 : (x = (transform(x) - t0) * k10, clamp ? Math.max(0, Math.min(1, x)) : x));
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}
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scale.domain = function(_) {
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return arguments.length ? ([x0, x1] = _, t0 = transform(x0 = +x0), t1 = transform(x1 = +x1), k10 = t0 === t1 ? 0 : 1 / (t1 - t0), scale) : [x0, x1];
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};
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scale.clamp = function(_) {
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return arguments.length ? (clamp = !!_, scale) : clamp;
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};
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scale.interpolator = function(_) {
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return arguments.length ? (interpolator = _, scale) : interpolator;
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};
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function range(interpolate) {
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return function(_) {
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var r0, r1;
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return arguments.length ? ([r0, r1] = _, interpolator = interpolate(r0, r1), scale) : [interpolator(0), interpolator(1)];
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};
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}
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scale.range = range(interpolate);
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scale.rangeRound = range(interpolateRound);
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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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return function(t) {
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transform = t, t0 = t(x0), t1 = t(x1), k10 = t0 === t1 ? 0 : 1 / (t1 - t0);
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return scale;
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};
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}
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export function copy(source, target) {
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return target
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.domain(source.domain())
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.interpolator(source.interpolator())
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.clamp(source.clamp())
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.unknown(source.unknown());
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}
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export default function sequential() {
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var scale = linearish(transformer()(identity));
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scale.copy = function() {
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return copy(scale, sequential());
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};
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return initInterpolator.apply(scale, arguments);
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}
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export function sequentialLog() {
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var scale = loggish(transformer()).domain([1, 10]);
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scale.copy = function() {
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return copy(scale, sequentialLog()).base(scale.base());
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};
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return initInterpolator.apply(scale, arguments);
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}
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export function sequentialSymlog() {
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var scale = symlogish(transformer());
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scale.copy = function() {
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return copy(scale, sequentialSymlog()).constant(scale.constant());
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};
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return initInterpolator.apply(scale, arguments);
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}
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export function sequentialPow() {
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var scale = powish(transformer());
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scale.copy = function() {
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return copy(scale, sequentialPow()).exponent(scale.exponent());
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};
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return initInterpolator.apply(scale, arguments);
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}
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export function sequentialSqrt() {
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return sequentialPow.apply(null, arguments).exponent(0.5);
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}
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