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## English
[RU](https://github.com/nortikin/sverchok/blob/master/README_RU.md)
**Addon for**: [Blender](http://blender.org) version 5.1, 4.5, 3.6, 2.8. For *2.79*, see [special installation instructions](https://github.com/nortikin/sverchok/wiki/Sverchok-for-Blender-2.79-installation).
**License**: [GPL3](http://www.gnu.org/licenses/quick-guide-gplv3.html)
**Prerequisites**: Some optional nodes require additional libraries. See this [wiki page](https://github.com/nortikin/sverchok/wiki/Dependencies) for a list of dependencies and installation instructions.
[**Documentation**](http://nortikin.github.io/sverchok/docs/main.html): If anything is unclear or missing in this document, please ask on the [Issue Tracker](https://github.com/nortikin/sverchok/issues). We want to improve these resources and your feedback helps!
**Community**: [Discord](https://discord.gg/pjHHhjJz8Z)
### Description
Sverchok is a powerful parametric tool for architects and designers, enabling visual programming of geometry through nodes. Mesh and geometry programming involves combining basic elements such as:
- Lists of indexed vectors representing coordinates (Sverchok uses zero-based indexing)
- Lists of grouped indices representing edges and polygons
- Matrices (user-friendly rotation-scale-location transformations)
- Curves
- Surfaces
- Scalar and vector fields
- Solids
- Insolation and solar heating calculations
### Features
With over 600 nodes for creating and manipulating geometry, combining these nodes enables you to:
- Create parametric constructions
- Easily adjust parameters using sliders and formulas
- Utilize powerful nodes including: Profile parametric, UVconnect, Generative art, Mesh expression, Proportion edit, Wafel, Adaptive Polygons (tissue vectorized), Adaptive edges, ExecNodeMod, Vector Interpolation series, List manipulators, CSG Boolean, Bmesh operations, Bmesh properties, and more
- Perform cross-sections, extrusions, and other modifications with flexible, parameterized, and vectorized node tools
- Calculate areas, volumes, and perform other geometric analysis
- Create or import CSV tables and custom formats
- Work with vector/scalar fields—create them and visualize data
- Perform solid modeling
- Code custom nodes in Python using the Scripted node
- Create custom 'addons' based on node layouts and integrate them into your workflow via Sverchok's 3D View panel
- Access Blender's Python API (bpy) with specialized *Set* and *Get* nodes
- Update Sverchok with a single click
- Incorporate genetic algorithms into your workflow
- Perform insolation/radiation calculations
- Export SVG/DXF drawings directly from node trees
- Exchange BREP/NURBS/IFC data
- And much more!
### Installation
Install Sverchok like any other Blender addon.
- **Installation from Preferences**
Download the Sverchok [archive (zip) from GitHub](https://github.com/nortikin/sverchok/archive/refs/heads/master.zip)
- Do not unpack the archive after downloading — Blender will handle this
- Mac OS users may need to [recompress the folder](https://support.apple.com/guide/mac-help/zip-and-unzip-files-and-folders-on-mac-mchlp2528/mac) if Safari automatically extracted and deleted the `.zip`
- Go to Edit > Preferences > Add-ons
- Click the `Install...` button
- Browse to the zip file location, select it, and click "Install Add-on"
- Blender will unpack the addon and present an option to enable it
- Enable it by checking the box next to `Node: Sverchok`
- Allow Blender a few seconds to complete the installation
- When complete, Blender will display:
- [x] Node: Sverchok
By default, Blender (version 2.80 and above) will remember enabled addons for future sessions.
- **Updating Sverchok**
Use the `Check for new version` button in Sverchok's panel in the Node Editor (press `N` to open the panel)
Click the `Update Sverchok` button
Press F8 to reload addons—the new version number will appear in the N-panel
- **Additional Dependencies**
Sverchok provides many features out-of-the-box, but additional nodes and scripts utilize third-party libraries including:
- scipy
- marching cubes
- geomdl
- SciKit-image
- shapely
- circlify
- freecadpython3lib
Installation instructions for these dependencies are available on this [wiki page](https://github.com/nortikin/sverchok/wiki/Dependencies)
### Troubleshooting Installation Errors
If installing from a release zip containing a folder named `sverchok-master.x.y.z`, rename it to `sverchok-master` since folder names with dots are invalid Python package names.
If using releases from [here](https://github.com/nortikin/sverchok/releases), note that these versioned zips are intended for testing older Sverchok versions with legacy .blend files and Blender versions, not for initial installations.
##### Errors during installation or enabling
If you encounter errors like:
> `NameError: name 'nodes' is not defined`
Exit and restart Blender, then enable Sverchok again. The addon may take up to 10 seconds to initialize depending on your system performance.
##### Other installation issues
If Sverchok still fails to install, we've compiled troubleshooting solutions [here](http://nortikin.github.io/sverchok/docs/installation.html). Please report any new issues you encounter.
Updating via the in-panel button may fail if you've renamed the installation folder. Follow [this guide](https://github.com/nortikin/sverchok/issues/669) for a bootstrap script solution.
### Contact and Credits
**Homepage**: [nortikin.github.io/sverchok/](http://nortikin.github.io/sverchok/)
**Authors**:
- Alexander Nedovizin
- Nikita Gorodetskiy
- Linus Yng
- Agustin Gimenez
- Dealga McArdle
- Konstantin Vorobiew
- Ilya Portnov
- Eleanor Howick
- Walter Perdan
- Marius Giurgi
- Sergey Soluyanov
- Ivan Prytov
- Victor Doval
- Dion Moult
- Alessandro Zomparelli
- Alex (aka Satabol)
- @kevinsmia1939
**Email**: sverchok-b3d@yandex.ru