An abstract skeleton target for body tracking input devices. These hardware devices pass information to the BodyState plugin which then holds a composite body for developer to query and use in the game without concern for actual hardware implementation of body tracking.
HMD mounted systems: Leap Motion - See Example plugin using bodystate https://github.com/ultraleap/UnrealPlugin/
Systems with motion controllers: Razer Hydra, Sixense STEM, HTC Vive (Lighthouse), Oculus Touch
Camera based systems: Microsoft Kinect, Intel RealSense
Single IMU based systems: SensorTag 2
Fullbody/Mixed systems: Perception Neuron