The Technomancer
card-carrying scientician
Skeletal tracking would seem difficult without multiple frames to reference, like in a video. Maybe pattern recognition for what a foreshortened hand in a half-grip looks like? Checked against larger pattern-recognized human bodies for proximity?soultron said:Serious answer: I think you'd need skeletal tracking (Kinect? Haha.) and a way of identifying the distance of one person's hand to a shoulder or hip joint on the other person.