188 lines
4.7 KiB
Markdown
188 lines
4.7 KiB
Markdown
# Conway's Game of Life (Vanilla JS)
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A polished, static, self-hosting-friendly web app implementing Conway’s Game of Life with HTML5 Canvas, vanilla JavaScript, and CSS.
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This project is designed for a self-hosted Gitea workflow and can be served from any static hosting target (Nginx, Caddy, pages-style branch, or CI-based copy/deploy).
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## Features
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- Correct Conway’s Game of Life rules with separate current/next generation buffers
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- Canvas-based renderer with responsive board sizing
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- Play, pause, single-step, clear, randomize
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- Adjustable simulation speed and zoom (cell size)
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- Click-and-drag painting and erasing
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- Preset patterns:
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- Block
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- Blinker
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- Toad
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- Beacon
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- Glider
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- Lightweight spaceship (LWSS)
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- Pulsar
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- Gosper glider gun
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- Pattern stamping workflow
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- Generation counter and live-cell counter
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- Boundary mode toggle (fixed edges vs toroidal wrapping)
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- Gridline toggle
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- Import/export board state (JSON + compact text)
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- Keyboard shortcuts and integrated help panel
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- About section and accessible, semantic UI
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- Light/dark theme toggle
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## Project Structure
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```text
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.
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├── .gitea/
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│ └── workflows/
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│ └── ci.yml
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├── js/
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│ ├── app.js # UI/controller wiring and app lifecycle
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│ ├── engine.js # Simulation engine and state transitions
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│ ├── patterns.js # Preset pattern library
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│ ├── renderer.js # Canvas drawing logic
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│ └── utils.js # Small helper utilities
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├── index.html
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├── style.css
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└── README.md
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```
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## Screenshots
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> Add screenshots in your repo and link them here.
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- `docs/screenshot-main.png` (placeholder)
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- `docs/screenshot-patterns.png` (placeholder)
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## Controls & Shortcuts
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### Mouse / UI
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- Click and drag on canvas to draw/erase cells
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- Use **Stamp Selected** to place a preset pattern
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- Use speed and cell-size sliders to tune simulation
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### Keyboard
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- `Space`: Play / Pause
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- `S`: Step one generation
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- `C`: Clear board
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- `R`: Randomize board
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- `G`: Toggle gridlines
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- `W`: Toggle wrapping mode
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- `+` / `-`: Zoom in/out (cell size)
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- `?`: Toggle help panel
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- `Esc`: Exit stamp mode
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## Local Development
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No build step is required.
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1. Clone your repository:
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```bash
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git clone https://gitea.nalakath.org/<your-user>/<your-repo>.git
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cd <your-repo>
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```
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2. Serve statically from the repo root, for example:
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```bash
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python3 -m http.server 8080
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```
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3. Open `http://localhost:8080`.
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## Push to Self-hosted Gitea
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If this folder is not already linked to your Gitea repo:
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```bash
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git init
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git add .
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git commit -m "Initial Conway's Game of Life web app"
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git branch -M main
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git remote add origin https://gitea.nalakath.org/<your-user>/<your-repo>.git
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git push -u origin main
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```
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## Deployment Options (Self-hosted Gitea-first)
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### 1) Serve static files directly with Nginx or Caddy
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Deploy by copying/checkout repo contents to a web root.
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**Nginx example (subdomain):**
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```nginx
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server {
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listen 80;
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server_name life.example.com;
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root /srv/www/conway_gameoflife;
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index index.html;
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location / {
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try_files $uri $uri/ /index.html;
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}
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}
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```
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**Caddy example (subdomain):**
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```caddyfile
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life.example.com {
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root * /srv/www/conway_gameoflife
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file_server
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try_files {path} /index.html
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}
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```
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### 2) Deploy from a pages-style branch (if your Gitea setup supports it)
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Keep app files in a dedicated branch (for example `pages`) and configure your Gitea pages/static serving integration to publish that branch.
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Example flow:
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```bash
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git checkout --orphan pages
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git rm -rf .
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# copy or keep only static site files
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git add .
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git commit -m "Publish static site"
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git push -u origin pages
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```
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### 3) Deploy via Gitea Actions to web root or object storage
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Use CI to run checks and then copy static files to your internal target (SSH, rsync, NFS mount, MinIO/S3-compatible object storage, etc.).
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Included workflow: `.gitea/workflows/ci.yml` with basic sanity checks.
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You can extend it to:
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- upload `index.html`, `style.css`, and `js/` to a server path
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- sync to object storage
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- update a reverse-proxy-served folder atomically
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## Subpath Hosting Notes
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This app uses only relative asset paths (`./style.css`, `./js/app.js`), so it works from:
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- root path: `https://example.com/`
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- subpath: `https://example.com/apps/life/`
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Just ensure `index.html`, `style.css`, and `js/` remain together.
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## Optional CI Notes
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The provided workflow checks:
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- required files exist
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- JavaScript syntax is valid (`node --check`)
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Add stricter linting if desired in your own environment.
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## Future Improvements
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- Pattern rotation/mirroring before stamping
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- RLE import/export
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- Infinite-grid viewport mode with panning
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- Touch-specific toolbar for mobile ergonomics
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- Save/load presets in localStorage
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