How do i know what i just did in front of the camera?,for example leg down and up

[EugeneVasiliev]

See this answer as an example:

Controlling moving of character using nuitrack sdk

Dear Ahmed Osman! Try to use this script. To track the user’s movement left-right (relative to the body position), you need to save the previous position of the target joint, such as the torso, and compare it with the new one obtained in the current frame. To determine the direction of displacement, we denote the “left” vector for the skeleton as a vector from the position of the right shoulder to the position of the left. Next, we need to get the displacement vector of the target joint as the…

Also check out this tutorial: Creating your First Unity Project using Nuitrack SDK.

Let me know if there’s anything else I can do for you.