Re: standard units for model/terrain files?

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Christopher R Volpe (volpe++at++ash.crd.ge.com)
Mon, 24 Feb 1997 10:52:04 -0500

Marcus Barnes wrote:
>
> On Feb 21, 2:50pm, Christopher R Volpe wrote:
> > Subject: standard units for model/terrain files?
> > Hi-
> > I was wondering if particular file formats (e.g. Multigen OpenFlight)
> > use a standard set of units for geometry (i.e. meters, feet, miles,
> > etc).
>
> Each OpenFlight file specifies its own units in the header record.

Great!

>
> The OpenFlight loader has a mode that lets you specify the target units that
> you want. For instance, you can load a file in inches that was modelled in
> feet. The loader's default target units is meters. See the readme file about
> PFFLT_USEUNITS for more details.

Thanks! This will be most helpful.

Followup question: Is there a format-independent interface for obtaining
such information? (I.e. does Performer specify a loader function that
specific loaders should comply with so that application developers can
obtain such information in a format-independent way much like the
format-independent way in which application can load files?)

thanks again,
Chris

--


Chris Volpe			Phone: (518) 387-7766 
GE Corporate R&D		Fax:   (518) 387-6560
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