How to detect if hand is open or not

[hyperhiromu]

Hi, I'm pretty new with programming with Leap Motion on Unity and right now I'm having some trouble finding a better way to detect if the hand is open or not. At the moment I'm using the interaction engine to detect it with a large invisible interaction object in the world if itself is being grasped and while it does work (albeit badly), I don't think this is the correct way to do it as doing it that way will make me unable to grasp other objects with the interaction engine scripts.

Is there a proper way to identify if the fist is open or closed?
If yes, can anyone guide me to the right direction on how to do it?

[ssstratton]

I do this from javascript - but it should be the same - check out grab (grip) strength. I regard fist reaching grip strength of 1.0 as becoming a fist, then having to go below 0.9 before it is open. Make sure you have a 'buffer' between your fist/flat or the state will flicker between them when you are at the transition point.

Best wishes
Andy