lancejpollard/ht.js

Hyperbolic tessellations in JavaScript.

ht.js

Hyperbolic tessellations in the 2D plane in JavaScript.

Overview

This is a direct port of roice3/Honeycombs from CSharp to TypeScript. It is in the process of being developed over the next few years.

Inspiration

• roice3/Honeycombs
• thoszhang/hyperbolic-tiling
• knexator/hyperbolic-tiling
• mountain/hyperbolic-wythoff
• cduck/hyperbolic

Papers

• Visualizing hyperbolic honeycombs
• Abstracting Rubik’s Cube

Notes

• Poincaré half-plane model
• Wythoff construction
• List of hyperbolic tilings
• CSharp to TypeScript
• CSharp codebase
• https://docs.google.com/document/d/1vUQPHvO4zOy5S1fyQIWMcy7vyzTvu5OYrUI6jmjpG90/edit

Dev

import { Tiling } from './src/Geometry/Tiling'
import { TilingConfig } from './src/Geometry/Tiling'
import { SVG } from './src/Format/SVG'

const config = new TilingConfig(3, 7, 10000)
const tiling = new Tiling(config)
tiling.Generate()
const polygons = tiling.m_tiles.map(tile => tile.Boundary)
SVG.WritePolygons('example.svg', polygons)

# count files with extension
find . -name "*.ts" -type f | wc -l

# count lines in files with extension
find . -name '*.ts' -type f | xargs wc -l

Ideas

The ideal is to have tiles, faces, points, and edges, and work with each tile like that.

const tessellation = new Tessellation(3, 7, {
  point: {
    visibility: 'hidden',
  },
  edge: {
    width: 8,
    fill: 'black',
  },
  face: {
    fill: 'gray',
  },
})

tiling.center(tile)
tiling.lock()
tiling.unlock()
// inch toward another block
tiling.move()
tiling.rotate()
tiling.querySelectorAll('face')
tiling.base
tiline.base.neighbors
tiline.base.points
tiline.base.edges
tiline.base.face
tiline.base.face.style.fill = 0x00ff00
tiline.base.face.addEventListener

tessellation.addEventListener('keyup', e => {
  if (e.key === 'up') {
    tessellation.center(tessellation.center.tiles[0])
  }
})

tessellation.addEventListener('tile:click', event => {
  tessellation.focus(event.currentTarget)
})

tessellation.addEventListener('tile:dblclick', event => {
  tessellation.orient(event.currentTarget)
})

tessellation.rotate(90)

tessellation.addEventListener('tile:remove')
tessellation.addEventListener('tile:create')
tessellation.addEventListener('tile:mouseover')
tessellation.addEventListener('tile:mouseupoutside')
tessellation.addEventListener('tile:click')
tessellation.addEventListener('tile:touchstart')
tessellation.addEventListener('tile:touchend')
tessellation.addEventListener('resize')
tessellation.addEventListener('hover')

tessellation.center.edges.forEach(point => {
  point.style.fill = 'red'
})

function render() {
  tessellation.render()
  requestAnimationFrame(render)
}