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Article #237Re: Polhemus ISOTRACK/3-SPACE and VIRTUAL REALITY
From: Johan Thornton
Date: Fri, 17 Apr 1992 00:06
Date: Fri, 17 Apr 1992 00:06
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In article <drues.703291186@pv320a.vincent.iastate.edu> drues@iastate.edu writes: > >The Isotrak gives location (x,y,z) AND orientation (pitch, roll, yaw) for >a total of 6 degrees of freedom. I don't see how you could get all that >using ultrasound (especially the 3 angles). > Actually, it's quite simple. Using three sound sources located sufficiently far apart will tell you the object's location and orientation. And if you only need the orientation of a plane, two sources are sufficient. -- Johan Thornton (but my friends call me jthornto@ee.ubc.ca)
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Newsgroups: comp.dsp,sci.engr.biomed,sci.electronics Path: arc1-ca.pugleaf.net!sparky!uunet!van-bc!ubc-cs!fs1.ee.ubc.ca!jthornto From: jthornto@ee.ubc.ca (Johan Thornton) Subject: Re: Polhemus ISOTRACK/3-SPACE and VIRTUAL REALITY Message-ID: <1992Apr17.000653.4251@ee.ubc.ca> Organization: University of BC, Electrical Engineering References: <1992Apr7.031033.19729@njitgw.njit.edu> <drues.703291186@pv320a.vincent.iastate.edu> Date: Fri, 17 Apr 1992 00:06:53 GMT Lines: 16