Public
Edited
Dec 2, 2022
2 forks
6 stars
chart = {
const scene = new T.Scene()
scene.background = new T.Color('#081f2b')
scene.add(new T.AmbientLight('#ffffff'))
for (const p of points.values())
scene.add(p)
while (true) {
renderer.render(scene, camera)
yield renderer.domElement
}
}
radius = d3.scaleLinear([6, -1], [0, 2])
points = {
const points = new Map()
for (const {mag, sra0, sdec0} of stars) {
const r = Math.round(radius(mag) * 10) / 10
if (r > 0) {
const p = points.get(r) || new T.Points(new T.Geometry(), new T.PointsMaterial({ size: r }))
p.geometry.vertices.push(new T.Vector3().setFromSphericalCoords(100, Math.PI / 2 - sdec0, sra0))
points.set(r, p)
}
}
invalidation.then(() => {
for (const {geometry, material} of points.values()) {
geometry.dispose()
material.dispose()
}
})
return points
}
controls = {
const controls = new T.OrbitControls(camera, renderer.domElement)
controls.enablePan = false
controls.enableZoom = true
controls.minDistance = 20
controls.maxDistance = 200
controls.rotateSpeed = -1
return controls
}
camera = {
const camera = new T.PerspectiveCamera(75, width / height, 1, 1000)
camera.position.set(0, 0, 100)
camera.updateProjectionMatrix()
return camera
}
renderer = {
const renderer = new T.WebGLRenderer({ antialias: true })
renderer.setPixelRatio(window.devicePixelRatio)
renderer.setSize(width, height)
return renderer
}
height = mobile ? width * 1.5 : width / 1.5
mobile = width <= 480
import { stars } from '@visnup/yale-bright-star-catalog'
// Load Three.js and the orbit controls.
T = {
const THREE = window.THREE = await require('three@0.124')
await require('three/examples/js/controls/OrbitControls.js').catch(() => {})
return THREE
}
d3 = require('d3-scale@3')
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.