| 1 | import {cubehelix} from "d3-color";
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| 2 | import interpolateColor from "./color";
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| 3 |
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| 4 | export default (function gamma(y) {
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| 5 | y = +y;
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| 6 |
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| 7 | function interpolateCubehelixLong(start, end) {
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| 8 | var h = interpolateColor((start = cubehelix(start)).h, (end = cubehelix(end)).h),
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| 9 | s = interpolateColor(start.s, end.s),
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| 10 | l = interpolateColor(start.l, end.l),
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| 11 | opacity = interpolateColor(start.opacity, end.opacity);
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| 12 | return function(t) {
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| 13 | start.h = h(t);
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| 14 | start.s = s(t);
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| 15 | start.l = l(Math.pow(t, y));
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| 16 | start.opacity = opacity(t);
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| 17 | return start + "";
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| 18 | };
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| 19 | }
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| 20 |
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| 21 | interpolateCubehelixLong.gamma = gamma;
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| 22 |
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| 23 | return interpolateCubehelixLong;
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| 24 | })(1);
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