The use of stereoscopy for immersive applications in engineering
is essential. This is achieved through user head-tracking, multiprojection
calculations and the determination of dynamic parameters
of stereoscopy [Ware et al. 1998]. Head-tracking helps to
determine the relative position of the user in the viewing screens.
This position is the input to build suitable viewpoints. Figure 3
shows examples of different views from tracking the user’s head.
Finally, in our scenario, the proper determination of the stereoscopy
parameters is directly related to the navigation techniques of
the immersive environment. For example, the operation “Go to”
has as prerequisite the determination of the target object to start
the navigation. Based on the size of this object, the representation
is scaled and the stereoscopic parameters (eye distance and zero
parallax distance) are dynamically calculated. A sequence of
images illustrating scales in a cave is presented in Figure 4.