Hi @cleojones, you can use the “userPresenceState” state found
within the Tobii Core SDK with sample code and detailed
instruction @ https://tobii.github.io/CoreSDK/articles/states.html
This should allow you to detect the presence of a user, and
act accordingly within your program.
For the capture of gaze co-ordinates, you can run the
sample program, “Interaction_Streams_101” available @
https://github.com/Tobii/CoreSDK
which shows how this is done.
Please let us know if we can be of further assistance.