Installation

Prerequisites

Version 2 of MachUpX is dependent upon the AirfoilDatabase package, also distributed by the USU AeroLab. The source code for AirfoilDatabase can be found on our Github page. The command to $ pip install . should automatically download and install AirfoilDatabase for you. If not, you will need to download and install it manually.

Getting Python

If you do not have Python installed on your machine, it can be downloaded from a number of locations. We use https://www.anaconda.com/distribution/. Please be sure you have Python 3.6 or later.

Getting the Source Code

You can either download the source as a ZIP file and extract the contents, or clone the MachUpX repository using Git. If your system does not already have a version of Git installed, you will not be able to use this second option unless you first download and install Git. If you are unsure, you can check by typing git --version into a command prompt.

Installing

Once you have the source code downloaded, navigate to the root (MachUpX/) directory and execute

$ pip install .

Please note that any time you update the source code (e.g. after executing a git pull), MachUpX will need to be reinstalled by executing the above command.

Testing the Installation

Once the installation is complete, run

$ py.test

to verify MachUpX is working properly on your machine. Some warnings and depreciation notices are normal.

FreeCAD for Exporting STEP Files

MachUpX is able to generate CAD models of the airframe data provided using the STEP exchange format (.stp). These can be opened by any CAD package. In order to do this, MachUpX uses the FreeCAD Python API. As such, FreeCAD needs to be installed on your machine for this to work. FreeCAD can be downloaded from https://www.freecadweb.org/ or on Linux systems using

$ sudo apt-get install freecad

You will then need to add the FreeCAD modules to the Python path. This can be done using Conda (comes with Anaconda python). On Linux, you will need to add the following directories using the command conda-develop, i.e.

$ conda-develop /usr/lib/freecad/lib
$ conda-develop /usr/lib/freecad/bin
$ conda-develop /usr/lib/freecad/bin/lib
$ conda-develop /usr/lib/freecad/Ext
$ conda-develop /usr/lib/freecad/Mod
$ conda-develop /usr/lib/freecad/Gui

The location of these directories will vary depending on your machine’s configuration. When you call the aircraft_export_step() function, you may see No modules found in /usr/lib/freecad-python3/Mod or a similar error message in yellow or red text. This means the libraries were found. Any other error message or a STEP file not being generated indicate that you have not properly configured FreeCAD for Python to recognize the FreeCAD modules.