Star-Mapper — Cortex Graph Explorer

A high-performance Neo4j graph visualization app with Python-precomputed layouts and a Canvas 2D frontend.

Quick Start

# 1. Clone & enter the repo
git clone https://github.com/Askill/Star-Mapper.git
cd Star-Mapper

# 2. Create a virtual environment & install dependencies
python3 -m venv .venv
source .venv/bin/activate
pip install -r requirements.txt

# 3. Run the app
python app.py

Open http://localhost:5555 in your browser.

Environment Variables (optional)

Variable	Default	Description
NEO4J_HTTP_URL	https://neo4j.develop.cortex.cloud.otto.de	Neo4j HTTP endpoint
NEO4J_USER	neo4j	Username
NEO4J_PASSWORD	(empty)	Password
NEO4J_DATABASE	neo4j	Database name

# Example: connect to a different instance
NEO4J_HTTP_URL=https://my-neo4j.example.com NEO4J_USER=admin NEO4J_PASSWORD=secret python app.py

You can also change the connection at runtime via the Connection Settings panel in the sidebar.

Features

• Neo4j connectivity via HTTP Transactional API (works behind ALB/HTTP proxies)
• Python-precomputed layouts using igraph (C-based) — auto-selects algorithm by graph size
• Canvas 2D rendering with D3 zoom/pan, quadtree hit testing, viewport frustum culling
• Curved edges with configurable curvature, multi-edge spreading
• Recursive highlight diffusion — click a node to BFS-highlight neighbors with decaying opacity
• Visual settings sliders — curvature, edge opacity/width/color, node size, label size/zoom, spacing, iterations
• Schema browser, sample queries, node search, minimap, dark glass-morphism theme

Performance

Nodes	Layout Time
300	~10 ms
3,000	~77 ms
5,000	~313 ms

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Original Star-Mapper description below.

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Original: Website Mapper

Calls every link on a given website and produces an explorable graph visualization.

Please note that the graph layout can take a long time since it is JS based. Loading a graph with 3000 Nodes may take 5 minutes or more.

    Map any website. Only map websites you own, as this tool will open any link on a given
    website, which can potentially incure high costs for the owner and be interpreted 
    as a small scale DOS attack.

        optional arguments:
        -h, --help            show this help message and exit
        -url                  url to map
        --plot-cached         path to cached file
        -limit                maximum number of nodes on original site

Examples:

Google.de: