Battery Charged Model

This point model contains three emitting IR diodes, which means that six degrees of freedom of the user's head movement can be related to the software, and it's charged by two 1.5V batteries. It has been built according to Freetrack 2.1 specification, but it can be used with version 2.2 of Freetrack if the dimension of the model, visible on figure 1, are entered into the 2.2 version of the program. Alternately, those interested can download preset configuration files available at the bottom of this page. With narrow FOV webcams, which are most frequently used, this model is best used at an approximate distance of about one meter from the cam because the user's head, along with the point model or a significant portion thereof, will not be removed from the camera's field of view. Perhaps it's not ostentatious to state that this model, provided that the web cam and Freetrack are set properly, will enable the user to rotate one's head as much as the neck will allow while still keeping the eyes on the screen without the cessation of tracking of any of the diodes on the point model. Calculus indicates that, with two LR03 alkaline batteries of 1200mAh capacity, this point model will work for about twelve hours. While placing the batteries into the ledges, strict care should be taken that charge markers on the batteries are aligned properly with charge markers on the ledges. Tin holders visible on figure 3 provide for mounting this point model easily on a brim of a hat.