Thanks for your kind reply. I am familiar with the Processing programming language. The advantage is that it’s Java based and the compiled version can be targeted to different platforms.
Each year at the science day we demonstrate technologies and this year I wanted to show something about contactless interacting with a computer (last year I showed a leap sensor to the audience).
I had something in mind like a switch that can be toggled by staring at it. And a real lightbulb that switches on and off.
There *was* a library available: https://github.com/AugustoEst/gazetrack
Last year I bought a Tobii 4C, this year I started building a computer and now I wanted concentrating on the software but realised the library was off-line…
I could run the demo… but that is not same…