Dungeongen

A procedural dungeon generation and rendering system for tabletop RPG maps.

🎮 Try it Online

dungeongen-web.onrender.com - No installation required!

Quick Start

pip install dungeongen
python -m dungeongen.webview.app

Then open http://localhost:5050 in your browser to generate dungeons interactively.

Features

Layout Generation

• Procedural room placement with configurable room sizes and shapes (rectangular, circular)
• Intelligent passage routing that connects rooms with hallways
• Symmetry modes: None, Bilateral (mirror)
• Configurable density: Sparse, Normal, Tight packing
• Automatic door placement with open/closed states
• Stairs and dungeon exits

Rendering

• Hand-drawn aesthetic with crosshatch shading and organic lines
• Water features with procedural shorelines and ripple effects
• Room decorations: columns, altars, fountains, dais platforms, rocks
• High-quality SVG and PNG output
• Grid overlay for tabletop play

Water System

Procedural water generation using noise-based field generation:

• Depth levels: Dry, Puddles, Pools, Lakes, Flooded
• Organic shorelines using marching squares with Chaikin smoothing
• Ripple effects that follow contour curves

Project Structure

dungeongen/
├── src/dungeongen/      # Main package
│   ├── layout/          # Dungeon layout generation
│   │   ├── generator.py # Main procedural generator
│   │   ├── models.py    # Room, Passage, Door data models
│   │   ├── params.py    # Generation parameters
│   │   └── validator.py # Layout validation
│   │
│   ├── map/             # Map rendering system
│   │   ├── map.py       # Main renderer
│   │   ├── room.py      # Room rendering
│   │   ├── passage.py   # Passage rendering
│   │   ├── water_layer.py # Water generation
│   │   └── _props/      # Decorations (columns, altars, etc.)
│   │
│   ├── drawing/         # Drawing utilities
│   │   ├── crosshatch.py    # Crosshatch shading
│   │   └── water.py         # Water rendering
│   │
│   ├── algorithms/      # Generic algorithms
│   │   ├── marching_squares.py  # Contour extraction
│   │   ├── chaikin.py          # Curve smoothing
│   │   └── poisson.py          # Poisson disk sampling
│   │
│   ├── graphics/        # Graphics utilities
│   │   ├── noise.py     # Perlin noise, FBM
│   │   └── shapes.py    # Shape primitives
│   │
│   └── webview/         # Interactive web preview
│       ├── app.py       # Flask application
│       └── templates/   # HTML templates
│
├── tests/               # Test suite
├── docs/                # Documentation
└── pyproject.toml       # Package configuration

Installation

From PyPI

pip install dungeongen

From Source (for development)

git clone https://github.com/benjcooley/dungeongen.git
cd dungeongen
pip install -e .

Dependencies

• Python 3.10+
• skia-python (rendering)
• numpy (noise generation)
• Flask (web preview)
• rich (logging)

Usage

Web Preview

python -m dungeongen.webview.app

Then open http://localhost:5050 in your browser.

Python API

from dungeongen.layout import DungeonGenerator, GenerationParams, DungeonSize, SymmetryType
from dungeongen.webview.adapter import convert_dungeon
from dungeongen.map.water_layer import WaterDepth

# Configure generation
params = GenerationParams()
params.size = DungeonSize.MEDIUM
params.symmetry = SymmetryType.BILATERAL

# Generate layout
generator = DungeonGenerator(params)
dungeon = generator.generate(seed=42)

# Convert to renderable map with water
dungeon_map = convert_dungeon(dungeon, water_depth=WaterDepth.POOLS)

# Render to PNG or SVG
dungeon_map.render_to_png('my_dungeon.png')
dungeon_map.render_to_svg('my_dungeon.svg')

Configuration Options

Dungeon Size

• TINY - 4-6 rooms
• SMALL - 6-10 rooms
• MEDIUM - 10-20 rooms
• LARGE - 20-35 rooms
• XLARGE - 35-50 rooms

Symmetry Types

• NONE - Asymmetric layout
• BILATERAL - Mirror symmetry (left/right)
• RADIAL_2 - 180° rotational symmetry (future)
• RADIAL_4 - 90° rotational symmetry (future)

Water Depth

• DRY - No water
• PUDDLES - ~45% coverage
• POOLS - ~65% coverage
• LAKES - ~82% coverage
• FLOODED - ~90% coverage

Acknowledgments

This project was inspired by watabou's One Page Dungeon, a fantastic procedural dungeon generator. The hand-drawn crosshatch aesthetic and overall visual style draw heavily from watabou's work.

• One Page Dungeon Generator: https://watabou.itch.io/one-page-dungeon
• watabou's other generators: https://watabou.itch.io/

Differences from One Page Dungeon

This is a complete rewrite in Python, not a port. Options do not work identically as this is a completely different codebase. Key differences:

Not yet implemented:

• Only bilateral (mirror) symmetry is supported; linear, radial, and other layout modes are planned
• Some props are missing (casket, star, podium, curtains, barrels)
• Various bugs and edge cases - not everything works perfectly

Will not be added:

• Auto-rotate transform for diagonal map views - this library outputs maps for further processing
• Auto-generated text, titles, and descriptions - this is a map generator, not a complete document generator. That being said you're welcome to add your own dungeon bits

License

MIT License - See LICENSE file for details.