| 1 | import {rgb} from "d3-color";
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| 2 | import {gamma as interpolateGamma} from "./color";
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| 3 |
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| 4 | export default (function gamma(y) {
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| 5 | var interpolateColor = interpolateGamma(y);
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| 6 |
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| 7 | function interpolateRgb(start, end) {
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| 8 | var r = interpolateColor((start = rgb(start)).r, (end = rgb(end)).r),
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| 9 | g = interpolateColor(start.g, end.g),
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| 10 | b = interpolateColor(start.b, end.b),
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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.r = r(t);
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| 14 | start.g = g(t);
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| 15 | start.b = b(t);
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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 | interpolateRgb.gamma = gamma;
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| 22 |
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| 23 | return interpolateRgb;
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| 24 | })(1);
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