In the previous chapter, we took our Kinect data off of the computer screen and turned it into a physical object in the real world. In doing so, we turned the Kinect into a kind of still camera. We used it to capture 3D data about the world in front of it, freezing that data into a solid object preserved forever in plastic. The results were exciting, but they discarded one of the most important aspects of the Kinect’s capacity: the ability to capture movement. In this chapter, we’re going to take the motion captured by the Kinect off the screen and out into the physical world. We’ll build a simple robotic arm and then explore two ways to control this arm with the movements of our own ....