NOTICE

# PyLCSS Third-Party Notices

Document version: 2.1
Last updated: 2026-08-01

This file identifies third-party software used by or obtainable through
PyLCSS 2.2.0. It is a notice and license index, not a replacement for the
license text supplied by each third party.

PyLCSS-authored code is licensed under the PolyForm Shield License 1.0.0 plus
the additional LGPL compatibility permission in `LICENSE`. Third-party
software is not covered by the PyLCSS license. Each component remains subject
to its own copyright notices, license terms, warranty disclaimers, and source
obligations. No third-party name or mark implies sponsorship or endorsement.

## Installed license materials

The Windows setup installs or retains license materials in:

- `app/THIRD_PARTY_LICENSES/bundled/` for software carried inside setup or the
  launcher;
- `app/THIRD_PARTY_LICENSES/common/` for commonly referenced full license
  texts; and
- `app/THIRD_PARTY_LICENSES/python-packages/` for the actual Python
  distributions installed into the isolated runtime.

The package exporter generates `INDEX.json` and `INDEX.txt` from the installed
wheel records. It copies both metadata license files and package-internal
license trees and preserves wheel-relative paths. This is important for native
bundles such as CasADi and CadQuery OCP, which carry many separate notices.
Optional solver archives retain their upstream notices beside their binaries.
The exact packaged license files control if this summary differs from them.

## What setup downloads and what users accept

The setup contains the PyLCSS source, a small launcher, the CPython 3.12.10
embeddable runtime, and the pinned pip 26.1.2 zipapp. During installation pip
downloads the exact Windows CPython 3.12 wheels and SHA-256 values recorded in
`requirements-windows-py312.lock`, including every transitive dependency, from
the configured Python package index. CalculiX,
OpenRadioss, and FreeCAD are downloaded only when their optional tasks are
selected.

Setup asks for acceptance of the PyLCSS license and displays this notice before
installation. It does not add a separate click-through for CalculiX,
OpenRadioss, FreeCAD, or Python packages. Selecting or downloading a component
does not relicense it: its own license still governs use, modification, and
redistribution.

## Optional external applications

### CalculiX 2.23 (`ccx_static.exe`)

- Purpose: structural finite-element solves launched as a separate process.
- Copyright: Copyright (C) 1998-2026 Guido Dhondt, Klaus Wittig, and
  contributors identified by the upstream project.
- License: GNU General Public License version 2 or later, as stated upstream.
- Binary: https://www.dhondt.de/calculix_2.23_4win.zip
- Corresponding source: https://www.dhondt.de/ccx_2.23.src.tar.bz2
- Project: https://www.calculix.de/

The upstream Windows archive contains additional programs and libraries that
PyLCSS does not invoke. The provisioner removes the unused `tetgen.exe` and the
download archive but retains remaining upstream material, including
`README_Install`. Redistributors must independently satisfy the GPL source and
notice conditions for every binary they retain.

### OpenRadioss stable build dated 2026-06-15

- Purpose: Starter, Engine, and conversion processes for crash/impact work.
- Copyright: Copyright (C) 1986-2026 Altair Engineering Inc.
- License: GNU Affero General Public License version 3 or later.
- Release: https://github.com/OpenRadioss/OpenRadioss/releases/tag/latest-20260615
- Corresponding source: https://github.com/OpenRadioss/OpenRadioss/tree/latest-20260615
- License: https://github.com/OpenRadioss/OpenRadioss/blob/latest-20260615/LICENSE.md

The archive includes `COPYRIGHT.md`, `licenses/`, and additional material under
`extlib/`. Those files remain beside the installed solver and must be preserved
on redistribution.

### FreeCAD 1.1.3

- Purpose: optional interactive CAD authoring and headless parameter updates,
  launched as separate processes.
- License: GNU Lesser General Public License version 2.1.
- Release/source: https://github.com/FreeCAD/FreeCAD/tree/1.1.3
- License: https://github.com/FreeCAD/FreeCAD/blob/1.1.3/LICENSE

PyLCSS starts the official FreeCAD installer, which supplies FreeCAD's notices
and component licenses. PyLCSS does not bundle the FreeCAD binaries.

## Software carried by the Windows setup or launcher

| Component | Version/build | License | Project |
|---|---:|---|---|
| CPython embeddable runtime | 3.12.10 | Python Software Foundation License 2 and bundled notices | https://www.python.org/ |
| pip zipapp | 26.1.2, SHA-256 pinned | MIT; vendored dependencies have separate notices | https://pip.pypa.io/ |
| PyInstaller bootloader | 6.21.0 | GPL-2.0-or-later with the PyInstaller exception | https://pyinstaller.org/ |
| Inno Setup runtime | compiler-selected 6.x | Inno Setup License | https://jrsoftware.org/isinfo.php |

The build copies available license files for these components to
`THIRD_PARTY_LICENSES/bundled/`.

## Direct Python requirements

This table covers direct requirements. The generated installed-package index
covers transitive distributions and bundled native libraries.

| Distribution | Version | Primary license identifier or family |
|---|---:|---|
| numpy | 2.2.6 | BSD-3-Clause |
| scipy | 1.15.2 | BSD-3-Clause and bundled terms |
| pandas | 2.2.2 | BSD-3-Clause |
| PySide6 | 6.10.1 | LGPL-3.0-only community option selected for this distribution |
| NodeGraphQt | 0.6.43 | MIT |
| pyqtgraph | 0.14.0 | MIT |
| QtAwesome | 1.3.1 | MIT; bundled font works have separate terms below |
| cadquery | 2.6.1 | Apache-2.0 |
| vtk | 9.3.1 | BSD-3-Clause |
| scikit-fem | 11.0.0 | BSD-3-Clause |
| netgen-mesher | 6.2.2506 | LGPL-2.1 |
| meshio | 5.3.5 | MIT |
| scikit-image | 0.26.0 | BSD-3-Clause and bundled terms |
| numpy-stl | 3.2.0 | BSD-3-Clause |
| trimesh | 4.5.3 | MIT |
| lxml | 5.3.0 | BSD-3-Clause and bundled terms |
| fast-simplification | 0.1.13 | MIT |
| rtree | 1.4.1 | MIT; bundled libspatialindex has separate MIT terms |
| nevergrad | 1.0.4 | MIT |
| SALib | 1.5.2 | MIT |
| pyMOTO | 2.0.1 | MIT |
| torch | 2.9.1 | BSD-3-Clause and bundled terms |
| scikit-learn | 1.8.0 | BSD-3-Clause |
| hdbscan | 0.8.41 | BSD-3-Clause |
| joblib | 1.5.3 | BSD-3-Clause |
| pint | 0.25.2 | BSD-3-Clause |
| h5py | 3.11.0 | BSD-3-Clause and HDF5 terms |
| dill | 0.4.1 | BSD-3-Clause |
| networkx | 3.3 | BSD-3-Clause |
| openpyxl | 3.1.5 | MIT |
| cryptography | 48.0.0 | Apache-2.0 OR BSD-3-Clause |
| pydantic | 2.12.5 | MIT |
| pydantic-ai-slim | 1.96.1 | MIT |
| py7zr | 0.20.8 | LGPL-2.1-or-later; codec dependencies have separate terms |
| packaging | 26.0 | Apache-2.0 OR BSD-2-Clause |
| simpleeval | 1.0.3 | MIT |
| numba | 0.63.1 | BSD-2-Clause and bundled terms |

PyLCSS does not use PyAutoGUI, MouseInfo, or a system-wide mouse/keyboard
automation dependency.

## Icon-font attribution

QtAwesome 1.3.1 is Copyright (c) 2015 the Spyder development team and is MIT
licensed. Its wheel carries these unmodified, separately licensed font works:

| Font work | Version(s) | License |
|---|---:|---|
| Font Awesome | 4.7, 5.15.4, 6.7.2 | SIL Open Font License 1.1 |
| Elusive Icons | 2.0 | SIL Open Font License 1.1 |
| Material Design Icons | 5.9.55, 6.9.96 | Apache License 2.0 |
| Phosphor Icons | 1.3.0 | MIT |
| Remix Icon | 2.5.0 | Apache License 2.0 |
| Microsoft Codicons | 0.0.35 and 0.0.36 wheel files | CC BY 4.0 |

Upstream attribution and source:
https://github.com/spyder-ide/qtawesome/blob/v1.3.1/README.md#license
The installer includes OFL-1.1, Apache-2.0, CC-BY-4.0, and applicable packaged
MIT texts under `THIRD_PARTY_LICENSES`.

## LGPL source, replacement, and relinking information

The Windows distribution uses the community LGPL option for PySide6/Qt, not a
Qt commercial license. PyLCSS loads the Python wheels and native libraries at
runtime. The installation includes the complete PyLCSS source and the
additional LGPL compatibility permission in `LICENSE`. Recipients may replace
compatible LGPL-covered wheels or libraries and may modify or reverse engineer
the PyLCSS portion to the extent stated in that permission. No installation
mechanism intentionally prevents replacement or relinking.

Corresponding-source locations for the selected versions include:

- PySide6, Addons, Essentials, and Shiboken6 6.10.1:
  https://download.qt.io/official_releases/QtForPython/pyside6/
- Qt 6.10.1 libraries carried by those wheels:
  https://download.qt.io/official_releases/qt/6.10/6.10.1/single/
- Netgen 6.2.2506: https://github.com/NGSolve/netgen/tree/v6.2.2506
- netgen-occt 7.8.1 and CadQuery OCP 7.8.1.1.post1:
  https://github.com/CadQuery/OCP and https://github.com/CadQuery/ocp-build-system
- CasADi 3.7.2: https://github.com/casadi/casadi/tree/3.7.2
- py7zr 0.20.8 and its separately packaged codecs:
  https://github.com/miurahr/py7zr/tree/v0.20.8

The exporter preserves CasADi and CadQuery OCP package-internal license trees,
Netgen's pybind11 notice, and license files declared by transitive wheels. A
redistributor should archive the exact source releases and build scripts used
and must preserve all applicable notices, source offers, replacement rights,
and reverse-engineering rights.

This notice supports attribution and compliance review; it is not legal advice.
Distributors remain responsible for the exact artifacts they ship.