Published
Edited
Apr 13, 2020
1 star
cell
fps(cell)
import {fps} from '@zzzev/fps-counter'
{
d3.select(map).selectAll('circle.dot')
.attr("cx", d => d[0](t))
.attr("cy", d => d[1](t))
.attr('fill-opacity', d => d[2](t))
}
cell = {
restart
const duration = 30; // animation length in seconds
const t = d3.scaleLinear().domain([0, duration * 60]).range(extent);
const dots = d3.select(map).selectAll('circle.dot');
let i = 600;
while (i++ < duration * 60) {
dots.attr("cx", d => d[0](t(i)))
.attr("cy", d => d[1](t(i)))
.attr('fill-opacity', d => d[2](t(i)))
yield i
await Promises.tick(50);
}
}
data = Object.keys(json).map(d => {
// Data model: d = [lat, lon, alt, time]
const a = json[d].map(d => d3.merge([ projection([d[1], d[0]]), [d[2], d[3]] ]));
const x = d3.scaleLinear()
.domain(a.map(d => d[3]))
.range(a.map(d => d[0]))
.clamp(true);
const y = d3.scaleLinear()
.domain(a.map(d => d[3]))
.range(a.map(d => d[1]))
.clamp(true);
const opacity = function(t) {
const before = t < a[0][3];
const after = t > a[a.length - 1][3];
return (before || after) ? 0 : 1;
}
return [x, y, opacity]
})
json = FileAttachment("adsbQuadArray.json").json()
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.