I’m working at a project for my university. We want to use the vectordata from Live Driver (Facetracker) to control a face in Unity 3D but I don’t know where to start . How do link both programs together in the first place?
The Live Driver SDK is in C++, which means it’s not really that easy to use from C#. You can do so, but it’ll mean writing a little wrapper script for it, and that can be tricky.
Using C++ DLL's from Unity's C#? - Questions & Answers - Unity Discussions provides some info and links.