Reverts old changes

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• Code has been tested locally and/or in pipeline.
• (if applicable) documentation updated.
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docs/documentation/libraries/index.md

+---
+title: Libraries
+summary: Overview of the libraries respository
+authors:
+    - Sebastian Oberschwendtner
+    - Kristina Mazur
+date: 2024-11-28
+glightbox: false
+---
+
+As mentioned in the [build instructions](../get-involved/build/general.md), we have some external dependencies to:
+
+- :simple-cplusplus: [Eigen3 :octicons-link-external-16:](https://eigen.tuxfamily.org/index.php?title=Main_Page){:target="_blank"}
+- :simple-cplusplus: [Boost :octicons-link-external-16:](https://www.boost.org/){:target="_blank"}
+- :simple-cplusplus: [CGAL :octicons-link-external-16:](https://www.cgal.org/){:target="_blank"}
+- :simple-python: [pipenv :octicons-link-external-16:](https://pipenv.pypa.io/en/latest/){:target="_blank"} (not really a library, more a environment manager tool)
+
+
+!!! note
+    Currently, only `aircraftGeometry2` is documented.
+
+## aerodynamics
+![Icon](site:assets/images/documentation/aerodynamics.svg){.overview-img  align=left}
+This library helps with interacting with polar data.
+It has helper functions to extract and interpolate data of provided airfoil polars.
+{.overview-item}
+
+|Module Version|Language|License|Documentation|Dependencies|
+|:---:|:---:|:---:|---|---|
+|2.1.0|:simple-cplusplus: |GPLv3|-|-|
+
+---
+
+## aircraftGeometry2
+![Icon](site:assets/images/documentation/aircraft-geometry.svg){.overview-img  align=left}
+This library is based on the older [aircraftGeometry](#aircraftgeometry) library and extends it to be more modular.
+The modularity and flexibility is achieved by using the high performance [Computational Geometry Algorithms Library](https://www.cgal.org/) also known as **CGAL**.
+{.overview-item}
+
+|Module Version|Language|License|Documentation|Dependencies|
+|:---:|:---:|:---:|---|---|
+|2.1.0|:simple-cplusplus: |GPLv3|[Link](libraries/aircraftGeometry2/index.md)| [Eigen3](https://eigen.tuxfamily.org/index.php?title=Main_Page), [CGAL](https://www.cgal.org/)|
+
+---
+
+## airfoils
+![Icon](site:assets/images/documentation/airfoil.svg){.overview-img  align=left}
+The **airfoils** libary provides a database for different airfoils.
+{.overview-item}
+
+|Module Version|Language|License|Documentation|Dependencies|
+|:---:|:---:|:---:|---|---|
+|1.0.0|:simple-cplusplus: |GPLv3|-|-|
+
+---
+
+## aixml
+![Icon](site:assets/images/documentation/aixml.svg){.overview-img  align=left}
+The **aixml** library is the central library which handles the XML files and data access.
+It uses a simple XML library, namely *tinyxml*, to read and parse the XML files.
+{.overview-item}
+
+|Module Version|Language|License|Documentation|Dependencies|
+|:---:|:---:|:---:|---|---|
+|2.1.0|:simple-cplusplus: |GPLv3|-|-|
+
+---
+
+## atmosphere
+![Icon](site:assets/images/documentation/atmosphere.svg){.overview-img  align=left}
+The **atmosphere** library provides helper functions to calculate atmospheric properties according to the International Standard Atmosphere (*ISA*).
+You can set different atmospheric conditions (e.g. *ISA+25*) and calculate the physical properties of the air at different altitudes.
+{.overview-item}
+
+|Module Version|Language|License|Documentation|Dependencies|
+|:---:|:---:|:---:|---|---|
+|2.1.0|:simple-cplusplus: |GPLv3|-||
+
+---
+
+## blackboxTest
+![Icon](site:assets/images/documentation/blackbox.svg){.overview-img  align=left}
+The **blackboxTest** library provides an interface to run a complete module with different test cases and then checks whether a specific result is calculated or set compared to expected values defined in a `blackBoxTestCases.xml`. The tests are realized with the help of the _googleTest_ framework .
+{.overview-item}
+
+|Module Version|Language|License|Documentation|Dependencies|
+|:---:|:---:|:---:|---|---|
+|2.1.0|:simple-cplusplus: |GPLv3|-|[googleTest](https://google.github.io/googletest/)|
+
+---
+
+## engine
+![Icon](site:assets/images/documentation/engine.svg){.overview-img  align=left}
+This library helps with interacting with engine data.
+It has helper functions to extract and interpolate data of provided engine data decks.
+The engine decks can originate from different softwaretools as long as they provide the same file format.
+{.overview-item}
+
+|Module Version|Language|License|Documentation|Dependencies|
+|:---:|:---:|:---:|---|---|
+|2.1.0|:simple-cplusplus: |GPLv3|-|-|
+
+---
+
+## extern
+UNICADO currently uses two external libaries as submodules:
+
+- `doxygen-awesome-css` for documentation formation [(see here)](https://github.com/jothepro/doxygen-awesome-css.git)
+- `pybind11` to use C++ libraries in the python tools [(see here)](https://github.com/pybind/pybind11.git)
+
+---
+
+## liftingLineInterface
+![Icon](site:assets/images/documentation/lifting-line.svg){.overview-img  align=left}
+This library helps with interacting with results provided by the tools **Lifting Line** from DLR.
+It has helper functions to extract and interpolate data of the results from the tool.
+{.overview-item}
+
+|Module Version|Language|License|Documentation|Dependencies|
+|:---:|:---:|:---:|---|---|
+|2.1.0|:simple-cplusplus: |GPLv3|-|-|
+
+---
+
+## moduleBasics
+![Icon](site:assets/images/documentation/module-basics.svg){.overview-img  align=left}
+This library provides the basis structure for the modular approach of the **UNICADO** tools.
+The tools are intended to follow the *Strategy Design Pattern* to execute at different fidelity levels.
+The library gives a template how modules should be structured and gives helpers which can be used to select and implement the different fidelity methods.
+{.overview-item}
+
+|Module Version|Language|License|Documentation|Dependencies|
+|:---:|:---:|:---:|---|---|
+|2.1.0|:simple-cplusplus: |GPLv3|-|-|
+
+---
+
+## pymodulepackage
+![Icon](site:assets/images/documentation/pymodulepackage.svg){.overview-img  align=left}
+This library provides standardized UNICADO data preprocessing, run, and postprocessing functions for Python modules.
+{.overview-item}
+
+|Module Version|Language|License|Documentation|Dependencies|
+|:---:|:---:|:---:|---|---|
+|1.0.0|:simple-python: |GPLv3|-|-|
+
+---
+
+## runtimeInfo
+![Icon](site:assets/images/documentation/runtime-info.svg){.overview-img  align=left}
+This library handles the user interface during the modules execution.
+In provides custom output streams, which automatically handle the log files and error outputs according to the configuration files.
+{.overview-item}
+
+|Module Version|Language|License|Documentation|Dependencies|
+|:---:|:---:|:---:|---|---|
+|2.1.0|:simple-cplusplus: |GPLv3|-|-|
+
+---
+
+## standardFiles
+![Icon](site:assets/images/documentation/standard-files.svg){.overview-img  align=left}
+This library provides file interfaces and interacts with the operating system.
+It can handle process execution with a simple interface.
+The library can handle *UNIX* and *Windows* systems alike.
+{.overview-item}
+
+|Module Version|Language|License|Documentation|Dependencies|
+|:---:|:---:|:---:|---|---|
+|2.1.0|:simple-cplusplus: |GPLv3|-|-|
+
+!!! warning
+    Some functions of this library are a bit outdated! When using this library, please look first at the wonderful [STL :octicons-link-external-16:](https://en.cppreference.com/w/) whether the function you are seeking is already there.
+
+---
+
+## svl
+![Icon](site:assets/images/documentation/svl.svg){.overview-img  align=left}
+The `simple vector library` by Andrew Willmott provides vector and matrix classes.
+{.overview-item}
+
+|Module Version|Language|License|Documentation|Dependencies|
+|:---:|:---:|:---:|---|---|
+|2.1.0|:simple-cplusplus: | |[Link](https://www.cs.cmu.edu/~ajw/doc/svl.html)|-|
+
+!!! note
+    This will soon be replaced by `Eigen`.
+
+---
+
+## unitConversion
+![Icon](site:assets/images/documentation/unit-conversion.svg){.overview-img  align=left}
+The **unitConversion** groups the most commonly used unit in aerospace and let's you convert values from one unit to another.
+In addition, it defines some common **constants** which are useful for calculations.
+{.overview-item}
+
+|Module Version|Language|License|Documentation|Dependencies|
+|:---:|:---:|:---:|---|---|
+|2.1.0|:simple-cplusplus: |GPLv3|-|-|
\ No newline at end of file