Graham (graham++at++beast.asd.sgi.com)
Sun, 18 May 1997 13:05:41 -0700
GB
On May 16, 1:59pm, Christopher R Volpe wrote:
> Subject: Multigen HL database origin location
> 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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>-- End of excerpt from Christopher R Volpe
--
Vis-Sim is easy:
^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~ Level-Of-Detail switching example (__) (oo) U /-------\/ /---V / | || * |--| . * ||----|| ^^ ^^ Cow at 1 meter. Cow at 100 meters. Cow at 10,000 meters. ^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~ Do you get it yet?
---------------------------------------------------------------------- Graham (Grambo) Beasley Silicon Graphics, Inc. graham++at++sgi.com Manager Application Engr. voice (415) 933-5420 fax (415) 964-8671 ---------------------------------------------------------------------- ======================================================================= List Archives, FAQ, FTP: http://www.sgi.com/Technology/Performer/ Submissions: info-performer++at++sgi.com Admin. requests: info-performer-request++at++sgi.com
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