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VTK is all you need. AI-Ready VTK visualization for science and engineering.

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# viznoir

> VTK is all you need. Cinema-quality science visualization for AI agents.

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<br>

![Science Storytelling](https://raw.githubusercontent.com/kimimgo/viznoir/main/www/public/showcase/cavity_story.webp)

*One prompt → physics analysis → cinematic renders → LaTeX equations → publication-ready story.*

</div>

<br>

## What it does

An MCP server that gives AI agents full access to VTK's rendering pipeline — no ParaView GUI, no Jupyter notebooks, no display server. Your agent reads simulation data, applies filters, renders cinema-quality images, and exports animations, all headless.

**Works with:** Claude Code · Cursor · Windsurf · Gemini CLI · any MCP client

## Quick Start

### 1. Install

```bash
pip install viznoir

# With optional extras
pip install "viznoir[mesh]"       # meshio + trimesh (50+ formats)
pip install "viznoir[composite]"  # Pillow + matplotlib (split_animate)
pip install "viznoir[all]"        # everything
```

Requires Python ≥3.10. VTK wheel auto-installed (EGL headless rendering supported).

### 2. Verify

```bash
mcp-server-viznoir --help    # server entry point
python -c "import viznoir; print(viznoir.__version__)"
```

### 3. Use with an MCP client

Add to your MCP client config (`claude_desktop_config.json`, `~/.cursor/mcp.json`, etc.):

```json
{
  "mcpServers": {
    "viznoir": {
      "command": "mcp-server-viznoir",
      "env": {
        "VIZNOIR_DATA_DIR": "/path/to/your/simulation/data",
        "VIZNOIR_OUTPUT_DIR": "/path/to/output"
      }
    }
  }
}
```

Then ask your AI agent:

> *"Open cavity.foam, render the pressure field with cinematic lighting, then create a physics decomposition story."*

### 4. Or use as a Python library (advanced)

All tool implementations are importable as `async` functions. You provide a `VTKRunner` and `await` the result:

```python
import asyncio
from viznoir.core.runner import VTKRunner
from viznoir.tools.inspect import inspect_data_impl
from viznoir.tools.render import render_impl

async def main():
    runner = VTKRunner()

meta = await inspect_data_impl(file_path="cavity.foam", runner=runner)
    print(meta["fields"], meta["timesteps"])

result = await render_impl(
        file_path="cavity.foam",
        field_name="p",
        runner=runner,
        colormap="Cool to Warm",
        camera="isometric",
        width=1920, height=1080,
        output_filename="pressure.png",
    )
    print(result.file_path)

asyncio.run(main())
```

See [docs](https://kimimgo.github.io/viznoir/docs) for the full tool reference.

## Capabilities

| Category | Tools |
|----------|-------|
| **Rendering** | `render` · `cinematic_render` · `batch_render` · `volume_render` |
| **Filters** | `slice` · `contour` · `clip` · `streamlines` · `pv_isosurface` |
| **Analysis** | `inspect_data` · `inspect_physics` · `extract_stats` · `analyze_data` |
| **Probing** | `plot_over_line` · `integrate_surface` · `probe_timeseries` |
| **Animation** | `animate` · `split_animate` |
| **Comparison** | `compare` · `compose_assets` |
| **Export** | `preview_3d` · `execute_pipeline` |

**22 tools** · **12 resources** · **4 prompts** · **50+ file formats** (OpenFOAM, VTK, CGNS, Exodus, STL, glTF, …)

## Showcase — 10 Domains, One Pipeline

Every frame below is a single MCP tool call. No GUI, no post-processing, no ParaView.
Annotations are rendered **inside the 3D scene** via VTK-native text actors and leader lines — no Photoshop, no matplotlib overlay.

| | | | | |
|:-:|:-:|:-:|:-:|:-:|
| ![Medical](https://raw.githubusercontent.com/kimimgo/viznoir/main/www/public/showcase/01_skull_annotated.webp) | ![CFD](https://raw.githubusercontent.com/kimimgo/viznoir/main/www/public/showcase/02_combustion_annotated.webp) | ![Thermal](https://raw.githubusercontent.com/kimimgo/viznoir/main/www/public/showcase/03_heatsink_annotated.webp) | ![Geoscience](https://raw.githubusercontent.com/kimimgo/viznoir/main/www/public/showcase/04_seismic_annotated.webp) | ![Automotive](https://raw.githubusercontent.com/kimimgo/viznoir/main/www/public/showcase/05_drivaerml_annotated.webp) |
| **Medical** <br/> CT skull volume | **CFD** <br/> Combustion streamlines | **Thermal** <br/> Heatsink gradient | **Geoscience** <br/> Seismic wavefield | **Automotive** <br/> DrivAerML · 8.8M cells |
| ![Molecular](https://raw.githubusercontent.com/kimimgo/viznoir/main/www/public/showcase/06_h2o_annotated.webp) | ![Vascular](https://raw.githubusercontent.com/kimimgo/viznoir/main/www/public/showcase/07_aneurism_annotated.webp) | ![Planetary](https://raw.githubusercontent.com/kimimgo/viznoir/main/www/public/showcase/08_bennu_annotated.webp) | ![Structural](https://raw.githubusercontent.com/kimimgo/viznoir/main/www/public/showcase/09_cantilever_annotated.webp) | ![Volume](https://raw.githubusercontent.com/kimimgo/viznoir/main/www/public/showcase/10_combustion_annotated.webp) |
| **Molecular** <br/> H₂O electron density | **Vascular** <br/> Cerebral aneurysm MRA | **Planetary** <br/> Bennu · 196K triangles | **Structural** <br/> Cantilever FEA stress | **Volume** <br/> Thermal threshold |

</div>

### Physics-Aware Animations

Seven presets convert raw simulation data into publication-ready motion — each binds a rendering primitive to a physical phenomenon.

| Preset | Physics | Rendering |
|--------|---------|-----------|
| `streamline_growth` | Lagrangian advection | Particle path-line extension over time |
| `clip_sweep` | Pressure gradient cross-section | Moving clip plane |
| `layer_reveal` | CT density classification | Progressive isosurface stacking |
| `iso_sweep` | Orbital topology | Isovalue sweep with camera orbit |
| `warp_oscillation` | Structural mode shape | Warp-by-vector harmonic displacement |
| `light_orbit` | Oblique illumination | Rotating key light for material reveal |
| `threshold_reveal` | Feature hierarchy | Threshold peeling from outside → in |

### Story Composition (`compose_assets`)

![Cavity Story](https://raw.githubusercontent.com/kimimgo/viznoir/main/www/public/showcase/cavity_story.webp)

*Inspect → render → annotate → compose → narrate. One prompt produces a 4-panel physics decomposition with LaTeX-rendered governing equations.*

</div>

Layouts: `story` (vertical narrative) · `grid` (N×M comparison) · `slides` (16:9 keynote) · `video` (MP4 with transitions)

**Full interactive gallery:** https://kimimgo.github.io/viznoir/#showcase

## Architecture

```
  prompt                    "Render pressure from cavity.foam"
    │
  MCP Server                22 tools · 12 resources · 4 prompts
    │
  VTK Engine                readers → filters → renderer → camera
    │                       EGL/OSMesa headless · cinematic lighting
  Physics Layer             topology analysis · context parsing
    │                       vortex detection · stagnation points
  Animation                 7 physics presets · easing · timeline
    │                       transitions · compositor · video export
  Output                    PNG · WebP · MP4 · GLTF · LaTeX
```

## Numbers

| | |
|---|---|
| **22** MCP tools | **24** VTK filters |
| **10** domains | **19** native file formats |
| **6/6** VTK data types | **50+** formats via meshio |

## Documentation

**Homepage:** [kimimgo.github.io/viznoir](https://kimimgo.github.io/viznoir/)

**Developer docs:** [kimimgo.github.io/viznoir/docs](https://kimimgo.github.io/viznoir/docs) — full tool reference, domain gallery, architecture guide

## License

MIT

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