Then the simplest solution would be to use the
viz.mergeLinkable command. Have a look in the docs for an explanation. Here is some simple code showing how to use it:
Code:
#Combine position of patriot and ori of emagin into one sensor
tracker = viz.mergeLinkable(patriot,emagin)
#Link tracker to main viewpoint
headLink = viz.link(tracker,viz.MainView)