内置一共有6个
click, wave, push, circle, steady
Click: hand movement as pushes towards and away from the sensor.
Wave: hand movement as left-right waving, carried out at least four times in a row.
Push: hand movement as pushes towards and away from the sensor. Pushes are the same as focus detection clicks, but occur during tracking.
Swipe: swiped hand movement, either up, down, left or right, followed by the hand resting momentarily.
Circle: hand movement as circular motion. It needs to observe a full circle in either direction before identifying the gesture. Clockwise rotation is positive, anti-clockwise negative.
Steady: a hand that hasn't moved for some time.
(请查看:http://sweb.cityu.edu.hk/sm2608/styled-9/index.html)
但是个人认为不是那么容易使用,所以只是用来作为启动hand tracking的标示而已,而后自己来写关于手部动作的识别