Game Development Reference
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Figure 11.7 Stereoscopic screen for multi-screen use from NEC
market to compete with video projection. For 3D television, different manufacturers
are offering various stereoscopic screens with separation done by active or passive
eyeglasses. Some screens have a high resolution and some have a frame with a thin
border, which can make it possible to create an assembly of this type of screens to
create a custom-made visiocube. A prototype of JVC screen, with a resolution of
about 4 million pixels, allows a passive stereoscopic vision. The new NEC screen,
with a border as thin as 7.3mm, can be useful for a multi-screen use.
11.2.3.9 Connected hardware motor interfaces
In immersive VR systems, it is often necessary to connect motor interfaces to machines
separated from those executing a graphic application, either for the reasons of
performance - to avoid overloading the machines computing the images, or simply
due to geographical or dimensional constraints - the length of interface cables is often
limited. In this case, it is necessary to provide for a system so that the machines running
the application can, if required, access the data sent by the interfaces. The first solution,
which is rarely adopted, consists of using the “network'' version of the interface pilots.
But the solution used in general involves installing the standard pilots of the interface
only on the machine to which it is connected, and then setting up a client-server archi-
tecture which sends, via the network, the information read from the interface to each
machine requesting for it. Certain libraries like VRPN are designed on this principle
and generally integrate a number of interfaces.
11.2.4 Examples of large screen projection systems
11.2.4.1 Visiodesks or immersive desks
This type of interface, launched in the mid 90's, makes it possible to display stereo-
scopic images on a surface of a size of a desk or a drawing board. These immersive
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