The avatar for @fil
Fil
Vocateur.
Published
Color
Edited
Jul 2, 2020
Importers
51 stars
Color
display-p3CYM spectral mixHello, apcachHello, spectral.jsHello, Color.jsMetbrewer color schemesFabio Crameri’s ColormapsColorcetXKCD painbow color mapNamed CSS colorsOil SlickGrid illusionsUMAP SleepwalkSliced Optimal TransportCanvas path blurBlue FluoriteWalk on Spheres — segments editionWalk on SpheresGraphene Moiré 1.1CMasher color interpolators (#27)Interpolate colors with Catmull-Rom/Cubic/Monotone…?
“Perceptually uniform”?
Hue blurcmocean color interpolators (#27)Linde–Buzo–Gray RGB Color stipplingAutochromeforcePolarforceAngularcolor2cssRandom ColorsCanvas SpiralFrida Kahlo’s paletteHello glitchBlack and white colored castelo
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ciede2000 = (await require("d3-color-difference")).differenceCiede2000
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ramp(d3.interpolatePlasma)
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ramp(d3.interpolateRainbow) // interpolateWarm + interpolateCool
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ramp(d3.interpolateCividis)
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ramp(d3.interpolateSinebow)
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ramp(d3.interpolateSpectral)
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ramp(d3.interpolateViridis)
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ramp(d3.interpolateTurbo)
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ramp(d3.interpolateInferno)
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ramp(d3.interpolateMagma)
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ramp(d3.interpolateReds)
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ramp(d3.interpolateGreens)
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ramp(d3.interpolateGreys)
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import { lut } from "@fil/cmocean"
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ramp(await lut("Thermal"))
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ramp(await lut("Phase"))
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import { ramp as framp, schemes } from "@fil/colormaps" // fcrameri
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ramp(framp(schemes.roma))
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ramp(framp(schemes.berlin))
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function ramp(interpolate) {
const color = d3.scaleSequential(interpolate),
res = getProfile(color);

const height = 200,
context = DOM.context2d(width, height),
x = d3.scaleLinear([0, res.colors.length - 1], [0, width]),
diff = blur().radius(4)(res.diff),
y = d3.scaleLinear([0, 1], [height, 1]),
line = d3
.line()
.x((_, i) => x(i + .5))
.y(y)
.context(context),
data = [];

for (let i = 0; i < res.colors.length; i++) {
context.fillStyle = res.colors[i];
context.fillRect(x(i), 0, x(i + 1) + 1 - x(i), height);
}
context.strokeStyle = "white";
context.beginPath();
line(diff);
context.stroke();

return context.canvas;
}
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function getProfile(color) {
const diff = [],
colors = linspace(0, 1, width / 2).map(color);
for (let i = 0; i < colors.length; i++)
diff.push(ciede2000(colors[i], colors[i - 1]));
diff.shift();
return { colors, diff };
}
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d3 = require("d3@5", "d3-scale-chromatic@1")
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function linspace(start, stop, n = 50, endpoint = true) {
(n = Math.floor(n)),
(start = +start),
(stop = (stop - start) / (endpoint ? n - 1 : n));

var i = -1,
range = new Array(n);

while (++i < n) {
range[i] = start + i * stop;
}

return range;
}
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import { blur } from "@fil/moving-average-blur"
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