# Star-Mapper — Cortex Graph Explorer

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

## Quick Start

```bash
# 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 |

```bash
# 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    |

---

_Original Star-Mapper description below._

---

## 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:
![google.de](./docs/google.png)