Written in gtkmm4 and C++ for the linux desktop. The software is intended as a learning tool for amateur astronomers, with an interest in visual astronomy. TCalc offers a number of computations, a graphical view, and an ocular viewer. Help Documentation is included.

Clone the Tcalc repo, at the comand prompt -

$git clone https://github.com/AlexB67/TCalc.git
$cd TCalc
$mkdir build
$meson build/
$cd build
$ninja
$sudo ninja install

To uninstall

$sudo ninja uninstall

If you have used the software before please delete your user eyepiecesuser.TCalc and telescopesuser.TCalc files, if they exist. Found in /home/your_username/.config/gnome-tcalc

This will add the application to /user/local and appear in the applications list as GNOME TCalc. To be build as an rpm package in future.

The following packages are required to build the software natively.

• git
• gettext
• appstream-util
• gtkmm 4.0.2 or greater development libraries
• meson
• ninja build system

Consult/search your distribution for the above packages and install them if required. in Fedora 35 it would typically involve

sudo dnf install gtkmm4-devel
sudo dnf appstream-util
sudo dnf gettext

If in doubt use dnf search to find them

dnf search gtkmm
dnf search appstream

etc.

Some platforms may not yet have gtkmm4. You can still install the older tcalc-gtkmm3 version by using the tcalc-gtkmm3 branch To switch to this branch simple do

git checkout tcalc-gtkmm3

Enjoy.