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- 90-11/NASA
- From: uselton@wk207.nas.nasa.gov (Samuel P. Uselton)
- Subject: NASA Ames Virtual Wind Tunnel
- Date: 6 Nov 90 17:57:34 GMT
-
- Hello from a lurker. This is in response to your request for reports
- on lab work.
-
- Feel free to post this to sci.virtual-worlds. I'm not really clear on
- how posting to a moderated group ordinarily works.
-
- Our group at NASA Ames has started a VR project we are calling the "Virtual
- Wind Tunnel". The project is an attempt to take technology developed
- mainly in the VIEW lab here at NASA Ames (Scott Fisher's group, for those
- who index by person rather than acronym) and make a "useful" application.
- Our group's focus is visualization and user interfaces specifically for
- exploring and understanding the output of Computational Fluid Dynamics (CFD)
- codes. CFD simulates flow of a fluid around a body, in our case usually
- air around an airplane. The flows are very complicated and the data sets
- large. Many of our visualization tools start off as metaphors for the
- exploration of flows done in wind tunnels. The goal of the Virtual Wind Tunnel
- Project is a system that will permit more than one flow scientist (physicist,
- aero. engineer,...) to interact with 3D time varying flow calculation results.
- The main people doing the work so far are Steve Bryson and Creon Levit.
- Several of the rest of us are marginally involved (Jeff Hultquist, Al Globus
- and myself in particular).
-
- I helped Steve and Creon demonstrate our current prototype at Visualization 90.
- Our hardware is a boom mounted, head tracking, stereo viewer and a VPL glove,
- being driven by a SGI 320/VGX workstation. The demo allows the operator to
- see the surface of the body in the flow, rendered as outlined polygons
- (with hidden lines removed), and to use the polhemus on the glove to start
- a particle trace (think of the smoke emitter in a wind tunnel) from any
- location and see where it would go. 3-D flow but steady (not time varying).
- Gestures allow freezing a trace, starting a new one, grabbing the model
- (to allow it to be repositioned/oriented), and maybe a few more.
-
- We chose the boom mount over a head mount because we wanted the better
- resolution and brightness attainable from crt's, and because we are hoping
- to do a color upgrade with this brightness and resolution. CRT's are too
- heavy for head mount. The boom has built in tracking. A scientist actually
- using it in an office can look away to answer phone or see who's at the door
- without taking anything off OR changing the view. He can call someone else
- to see exactly what he is looking at. The boom was made for us by Fake Space
- systems, who showed it at Cyberthon.
-
-
- There are also some other VR type projects going on here at Ames, mainly in
- the Human Factors directorate (the parent organization of the View lab).
- Beth Wenzel and Scott Foster are doing synthesized locality specific acoustics.
- Lou Hitchner is working on a planetary exploration system based on recon
- photos. (The sample database is Mars.)
-
- I'll let them report their own details if they want.
-
- Sam Uselton uselton@nas.nasa.gov
- employed by CSC working for NASA speaking for myself
-