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Wand
The CAVE is one of the Ars Electronica Center’s most popular installations, is a cube measuring 3 x 3 x 3 meters. One side is open; the interior walls constitute its projection surfaces. In the CAVE, several individuals can simultaneously experience a virtual, three-dimensional world. The simulation technology installed here has reached such a level of sophistication that it actually gives users the feeling of being part of the installation. Doing away with the need for a data helmet—which isolated users from their environment—makes it possible for a group to visit the CAVE installation together—a social act in a virtual space. In order to enter the virtual world - that is, to control the spatial system - all that is needed are a pair of glasses and a Wand, a type of 3-D mouse, each of which must be equipped with a magnetic field sensor. These sensors register the position of the visitor within the CAVE space and his/her line of sight. The computer´s tremendous processing power enables it to continually produce graphics that accurately depict perspective. The graphics are projected to the left and right eye alternately. The glasses are equipped with a battery and an infrared receiver, and are synchronized with the pace of the graphics via an infrared signal from the computer. The process of moving about within the virtual world is accomplished by the Wand, a navigation instrument with a pressure-sensitive joystick.
Source: Pascal Maresch
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ARS Electronica - Museum of the Future 