Plot.plot({
style: { overflow: "visible" },
marginTop: 80,
marginRight: 80,
width: width + 100,
height: height + 90,
x: { domain: [0, width] },
y: { domain: [0, height] },
marks: [
Plot.voronoi(pts.slice(0, N)),
Plot.dot(pts, {
fill: (d, i) => (i < N ? "red" : "#ccc"),
r: Math.min(3, Math.sqrt(3000 / N))
})
]
})
pts = points(width, height, N)
N = 700
width = 700
height = 500 // if the aspect ratio width / height is too far from 1, you may have to adapt the algorithm
import { poissonDisc2d } from "@fil/2d-point-distributions"
function points(w, h, N) {
const t = Math.max(w, h);
const P = d3.sort(
poissonDisc2d(w + t / 10, h + t / 10, N * 1.2),
([x, y]) => -Math.min(w - x, h - y)
);
const Q = P.slice(0, N);
const M = d3.min(Q, ([x, y]) => Math.min(w - x, h - y));
// scale to fill
const ratio = t / (t - M);
for (const d of P) {
d[0] *= ratio;
d[1] *= ratio;
}
// translate to center
const x = d3.extent(Q, (d) => d[0]);
const y = d3.extent(Q, (d) => d[1]);
const tx = (w - x[1] - x[0]) / 2;
const ty = (h - y[1] - y[0]) / 2;
P.forEach((d) => {
d[0] += tx;
d[1] += ty;
});
// return Q; // or P for the purposes of the demo
return P;
}
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