im-zone

README

Zone plate generation

• Deployed as a Vercel Next.js (w/Rust/WASM) site
• Deployed as a Vercel Next.js slide deck
• Next.js - WASM - Rust - Go: ./packages/*
• Static image/video generation in Go: ./static-go/
• Original C++ code from CRC in ./legacy-CRC/ circa 1996
• Original Fortran version: lost, but if I had it, I would dockerize it!

VT Zone Plate	VH Zone Plate

Given as a talk at OttawaJS October '20 and first Next.js Conference

TODO

• Externalize module for zoneplate View/engines/hook/annotate (no controls)
  • TSdx
  • https://github.com/ovieokeh/npm-react-typescript-template
  • https://buttercms.com/blog/nextjs-storybook-and-lerna-build-a-monorepo-structure
• npm packages
  • normalize the README
  • normalize the package.json scripts - dev build lint test
  • enable jest in libs (microbundle)
• Alternate backend
  • Netlify https://github.com/netlify/next-on-netlify
  • Google Cloud Run (Docker)
• Refactor annotations (specific props)
• Minimal testing (unit & integration)
• Go: try to find a zero allocation model (especially for tinyGo)
  • go still allocates the array, and the copies it into the passed Uint8ClampedArray
  • Replace wasm_exec with ... a real module
  • webpack go loader npm
  • webpack go loader blog
• Review Styling

Usage with lerna

lerna bootstrap
lerna run dev --parallel

lerna run test

# example new package
lerna create --private render-js
# adjust names and  entrypoint:dist/index.js
cd packages/render-js && npm i -D microbundle standard jest

Add package.json targets:

"source": "lib/index.js",
"scripts": {
   ..
   "dev": "microbundle watch --jsx React.createElement"
 },
  "jest": {
    "coverageThreshold": {
      "global": {
        "branches": 0,
        "functions": 0,
        "lines": 0,
        "statements": 0
      }
    }
  },
  "standard": {
    "//parser": "babel-eslint",
    "env": {
      "jest": true
    }
  },

Front end

cd packages
npx create-next-app
cd front-end
lerna add render-js

History

I wrote the original zoneplate code as part af my first undergrad internship at CRC circa 1986. My task was to implement these test patterns as part of a video signal processing research group. The original implementation was written in Fortran on a DEC LSI-11 (64kB of memory).

This was my first introduction to conics. The patterns generalize to conic sections or projections:

I later joined the group permanently.

Advanced Video Systems group in 1999

Thanks to André, Bernard, Gilles, Phil, Tom, Mike, Jean-Pierre, Metin, Lew, James, Marc, Demin and so many more...