Currently, we are developing two codes: CFxD and GasDynCalc. We do not actively develop GTECalc. It has been tested and released. The basic functions are integrated and it is free to use. Since there is no any comments from users we do not have the plans to integrate advanced features.
After a long thought we decide to develop CAD engine ourselves to avoid a dependence on 3rd party. Now, we are busy with selection module as the mathematical way is not convenient. So, we are trying to use OpenGL features.
We tried all month to move to CAD engine Open Cascade. Unfortunately, it seems that it is not possible as we want to have a direct access to the key features. So, we are still thinking if we need to use a third-side engine to accelerate our development.
We finished alfa version of GTECalc. The code has been verified with university code. There is an integrated help and separate manual in pdf format. It is free to use and download. The program is here.