Multigen HL database origin location

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Christopher R Volpe (volpe++at++ash.crd.ge.com)
Fri, 16 May 1997 13:59:53 -0400

Does anyone (e.g. Marcus?) happen to know what the lat/long location is
for the origin in the Multigen OpenFlight Hunter-Ligget database on the
Performer 2.0 CD?

The problem I'm experiencing is this: I'm trying to provide the visuals
on an SGI (using Performer, and the OpenFlight HL database) for an
aircraft simulation running on a host computer that uses its own
proprietary HL database internally for vehicle dynamics and mission
functions, etc. Apparently, the origins of the two databases don't
coincide. The host simulator says the ownship is at a particular
flat-earth x,y location (which, as far as the host is concerned, is
somewhere within the modelled terrain area), and sends that information
to the visuals running on the SGI, but when I set they eyepoint to that
position, the terrain vanishes and I'm apparently off in outer-space
somewhere. Since both databases are in feet, I'm hoping that
incorporating a translational offset between the two databases will
solve the problem. If I knew the lat/long position of the origin of each
database, I could compute this translational offset.

Thanks in advance.

-Chris

--


Chris Volpe			Phone: (518) 387-7766 
GE Corporate R&D		Fax:   (518) 387-6560
PO Box 8 			Email: "volpecr" AT "crd.ge.com"
Schenectady, NY 12301		Web:   http://www.crd.ge.com/~volpecr
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