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ciju/blur.js

Created April 25, 2022 18:48
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  1. ciju created this gist Apr 25, 2022.
    16 changes: 16 additions & 0 deletions blur.js
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,16 @@
    const blur1 = (data) =>
    data.map((d, i) => {
    const previous = i === 0 ? i : i - 1;
    const next = i === data.length - 1 ? i : i + 1;
    const sum = (data[previous] || 0) + d + (data[next] || 0);
    d = sum / 3;
    return d;
    });

    const twice = (fn) => (x) => fn(fn(x));
    const fourTimes = (fn) => twice(twice(fn));
    const sixtyfourTimes = (fn) => fourTimes(fourTimes(fn));

    const blur = (x) => sixtyfourTimes(blur1)(x);

    export default blur;