dataviz engineer w/ passion for algorithms, maps & music
function noise(row, column, [x, y, z]) {
const n = fbm(octaves);
const t = Math.abs(Math.cos(row * 7.5 / width + n(x, y, z)));
return color(t).rgb();
//return n(x * 8, y * 8, z * 8);
}
imageData = {
const data = new Uint8ClampedArray(width * height * 4);
for (let row = 0; row < height; row++) {
for (let column = 0; column < width; column++) {
const [r, g, b] = noise(row, column, getSphereCoordinates(column / (width - 1), row / (height - 1)));
const index = (column + row * width) * 4;
data[index ] = r;
data[index + 1] = g;
data[index + 2] = b;
data[index + 3] = 255;
}
}
return data;
}
function getSphereCoordinates(u, v) {
const lon = (u * 360 - 180) * Math.PI / 180,
lat = (v * 180 - 90) * Math.PI / 180;
return [
(Math.cos(lat) * Math.cos(lon) + 1) / 2,
(Math.sin(lat) + 1) / 2,
(Math.cos(lat) * Math.sin(lon) + 1) / 2
]
}
color = chroma.scale(colors).mode("lab")
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