dxvid-pts/cobe

5kB WebGL globe lib.

Build

run pnpm run build

1. go to the file and remove the first (() => { and the last })();!

2. The entry point is src_default(canvas, params) when NOT minified otherwise z

3. Search for z=(t,e)=>{let i=(r,n,o)=>({type:r,value:typeof e[n]=="undefined" or similar eg via )=>{ and make sure the function is called "z". later there should be "undefined" (for orientation)

4. Miniify the code via https://skalman.github.io/UglifyJS-online/ and replace the code with the result

5. Use the config under uglifyJS_config.txt for the minification

6. check that entry point is z and that the function is called z in the minified code

A lightweight (5kB) WebGL globe lib. The name "COBE" stands for Cosmic Background Explorer.

---

• Demo and configurations
• Use with React: https://codesandbox.io/s/eager-sky-r2q0g
• Use with vanilla JS: https://codesandbox.io/s/peaceful-gwen-m579y
• Use with Vue3: https://stackblitz.com/edit/vitejs-vite-l5a8xk?file=src/App.vue
• Use with Svelte: https://codesandbox.io/s/great-visvesvaraya-78yf6?file=/App.svelte

Quick Start

<canvas
  id="cobe"
  style="width: 500px; height: 500px;"
  width="1000"
  height="1000"
></canvas>

import createGlobe from 'cobe'

let phi = 0
let canvas = document.getElementById("cobe")

const globe = createGlobe(canvas, {
  devicePixelRatio: 2,
  width: 1000,
  height: 1000,
  phi: 0,
  theta: 0,
  dark: 0,
  diffuse: 1.2,
  scale: 1,
  mapSamples: 16000,
  mapBrightness: 6,
  baseColor: [0.3, 0.3, 0.3],
  markerColor: [1, 0.5, 1],
  glowColor: [1, 1, 1],
  offset: [0, 0],
  markers: [
    { location: [37.7595, -122.4367], size: 0.03 },
    { location: [40.7128, -74.006], size: 0.1 },
  ],
  onRender: (state) => {
    // Called on every animation frame.
    // `state` will be an empty object, return updated params.
    state.phi = phi
    phi += 0.01
  },
})

// `globe` will be a Phenomenon (https://github.com/vaneenige/phenomenon) instance.
// To pause requestAnimationFrame:
// `globe.toggle()`
// To remove the instance:
// `globe.destroy()`
// ...

Acknowledgment

This project is inspired & based on the great work of:

• Spherical Fibonacci Mapping, Benjamin Keinert et al.
• https://www.shadertoy.com/view/lllXz4, Inigo Quilez
• https://github.blog/2020-12-21-how-we-built-the-github-globe
• https://github.com/vaneenige/phenomenon
• https://github.com/evanw/glslx

World map asset from:

• https://de.wikipedia.org/wiki/Datei:World_map_blank_without_borders.svg

License

The MIT License.