One of the greatest advantages of the virtual reality is the opportunity to register with a high precision the position of the participant in the environment. We used a function to log, 2 times for each second, the position of the participant, with x, y z and yrot coordinates. Yrot represents the rotation of the head on the y axis. This leads us to know which rooms were explored and in which order.
We use a java applet to render a pictorial view of the way followed by the participants. The map represents the position of the participant at each 500 ms. The color represents the time: yellow is used at the beginning of the session, red at the end. The little lines show the direction of the sight.
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