Visualization toolmaker. Founder @observablehq. Creator @d3. Former @nytgraphics. Pronounced BOSS-tock.
{
const n = width / radius;
const m = height / radius;
const context = DOM.context2d(width, height);
const tiles = [hexagons, squares, triangles]
.map(tile => tile(n, m)
.map(translate(width / 2, height / 2))
.map(jitter(1e-2))); // avoid collinear input
context.lineWidth = 1.5;
for (let i = 0; true; ++i) {
const ti = d3.interpolate(tiles[i % 3], tiles[(i + 1) % 3]);
for (let f = 0, F = 120; f < F; ++f) {
const delaunay = d3.Delaunay.from(ti(d3.easeCubic(f / F)));
const voronoi = delaunay.voronoi([0, 0, width, height]);
context.clearRect(0, 0, width, height);
context.beginPath();
voronoi.render(context);
context.stroke();
if (viewof centroids.value) {
context.beginPath();
delaunay.renderPoints(context, 1.5);
context.fill();
}
yield context.canvas;
}
}
}
function hexagons(n, m) {
const points = [];
const r = radius * Math.sqrt(8 / Math.sqrt(3));
const dx = r;
const dy = r * 3 / (4 * Math.sin(Math.PI / 3));
const x0 = -dx * n / 2;
const y0 = -dy * m / 2;
for (let j = 0, y = y0; j < m; y += dy, ++j) {
for (let i = 0, x = x0 + (j & 1) * dx / 2; i < n; x += dx, ++i) {
points.push([x, y]);
}
}
return points;
}
function squares(n, m) {
const points = [];
const r = radius * 2;
const dx = r;
const dy = r;
const x0 = -dx * n / 2;
const y0 = -dy * m / 2;
for (let j = 0, y = y0; j < m; y += dy, ++j) {
for (let i = 0, x = x0; i < n; x += dx, ++i) {
points.push([x, y]);
}
}
return points;
}
function triangles(n, m) {
const points = [];
const r = radius * Math.sqrt(4 / Math.sqrt(3));
const dx = r;
const dy = r * Math.sqrt(3);
const dr = r / Math.sqrt(12);
const x0 = -dx * n / 2;
const y0 = -dy * m / 2;
for (let j = 0, y = y0; j < m; y += dy, ++j) {
for (let i = 0, x = x0; i < n; x += dx, ++i) {
points.push([x, y + (j & 1 ^ i & 1 ? -1 : +1) * dr]);
}
}
return points;
}
jitter = e => ([x, y]) => [x + (Math.random() - 0.5) * e, y + (Math.random() - 0.5) * e]
translate = (tx, ty) => ([x, y]) => [x + tx, y + ty]
radius = 16
height = 640
d3 = require("d3-delaunay@5", "d3-ease@1", "d3-interpolate@1")
One platform to build and deploy the best data apps
Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.