– The EVE<\/a> of the Limsi lab<\/a><\/p>\n They are typical modern systems: they are reconfigurable and the pixel density is not uniform (for the SAS3+).<\/p>\n SAS3+ : High & High resolution<\/strong><\/p>\n The SAS3+ is the follower of the old SAS3, which was inaugurated 10 years ago.<\/p>\n This Cave has four screens. The three vertical glass screens are 3m wide and 4m high, so you don’t need a ceiling. There are 8 full-HD projector, 12000 lumens each, resulting in 1.5mm pixels.<\/p>\n 6 ART cameras optically track the user, two of which are in the bottom-left and bottom-right corners. This means that they had to cut two holes to put these two cameras. If you look carefully you’ll notice them, but they become completely invisible once you’re immersed. Putting the cameras here allows the user to bend to manipulate low objects without losing the tracking of the head or the hands.<\/p>\n But the most innovative part is the way the projectors are setup. You would think that for each face, you would put one projector for the bottom-half, and another for the top-half. But that’s boring.<\/p>\n For each wall, there’s indeed a projector for the bottom-half, but the second projector is in portrait-mode and can project on the whole surface !<\/p>\n This allows three different configurations :<\/p>\n – the standard one is to have Projectors 1 (P1) on, and Projectors 2 (P2) projecting only on the top-half. Each of the projectors are full-HD, but since P1 covers a smaller area, the pixels here are smaller than those in the top area ! You don’t need as much resolution above eye-level.<\/p>\n – the economic configuration doesn’t use P1 projectors, but P2 projectors project on the whole surface. The pixels are bigger but you save the energy and lamp time of 4 projectors. Priceless !<\/p>\n – the full-patate mode : P2 projectors aren’t turned on, only the P1 are projecting. You only get a half-size picture on each wall, but you have a much brighter image. Indeed, in standard configuration, since P2 projectors cover twice the area of P1, they are twice less bright ! So P1 projectors adapt their luminosity down to match that of P2. If you turn off P2 projectors, you can turn the P1 to full-patate, up to 11 !<\/p>\n This multi-resolution (different pixel sizes across the system) is a new trend which you can also find in the Dassault Syst\u00c3\u00a8mes’ Cave, the LIVES. The front screen has four projectors, the side two, and the floor only one.<\/p>\n With this new system, Clarte has become one of the biggest VR center of Europe, if not the world !<\/p>\n They now have two Caves (the old SAS3 has been transformed into the SASLab<\/a>), a workbench<\/a>, a collaborative room<\/a>, and\u00c2\u00a0\u00c2\u00a0nice haptics devices<\/a>.<\/p>\n And of course, great applications on each, such as VR4D<\/a>, TT3D<\/a> (formerly Sitac) and Ergo-Wide3<\/a>.<\/p>\n EVE : Multi-user<\/strong><\/p>\n The Limsi finally got its long-waited 3-sided Cave, the EVE<\/a> ( Evolutive Virtual Environment ) :<\/p>\n![\"\"](\"http:\/\/cb.nowan.net\/blog\/data\/2010\/12\/sas3+.jpg\" "\\"sas3+\\"")
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