ABSTRACT
This chapter describes the sensors that capture the real-time location of any object to know its position and (or) to follow its path. These motor interfaces are indispensable in virtual reality techniques. In this field, the object to be located is often a body part, the entire body or an object handled by the user. These devices, motor interfaces for virtual reality, can also be used in other sectors like metrology, robotics, etc. When they are used in virtual reality, we call them “trackers’’. These sensors are designed to measure only the spatial position of a moving reference point which is linked to the object observed, with respect to a fixed reference point. In the following chapter, we will describe special interfaces, such as data suits and data gloves, used to locate the body or a body part. These special location interfaces can use trackers for operating.
