I’ve never seen a three-finger rotate gesture used in an app, but that would be easy enough. Same with three-finger pinch.
My intention is to do this as an Engine patch, so they should all be bindable to events in Blueprint. I’m still studying the way gestures are implemented, though, so I haven’t come to a final determination about how I should do it. There are some limitations to the way it’s currently implemented, and I might make the gestures their own custom events outside of the ordinary input system. I don’t like, for example, that the current pinch gesture gets sent every tick, even after you’ve lifted both fingers of the screen, for example. Changing this to the way I think it should be implemented based on my experience in mobile would totally break backwards compatibility, so it’s going to take a little though to do this right.