Re: Constructing pfASD

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Dan Brockway (db++at++ParadigmSim.com)
Tue, 14 Apr 1998 15:02:21 -0500

Lee Willis wrote:
>
> Thom DeCarlo wrote:
> >Lee Willis wrote:
> >>
> >> >From: Jonas Andersson <jonasa++at++cs.umu.se>
> >> >To: info-performer++at++sgi.com
> >> >Subject: Constructing pfASD
> >> >Date: Friday, March 27, 1998 1:52 AM
> >>
> [snip]
... snip ...
>
> >It becomes something to be _avoided_! Our
> >applications need to ingest sub-meter elevation post spaced data and we
> >want to smoothly reduce resolution as the viewer moves away from the
> >terrain. This seems to be exactly the opposite of the situation you
> >describe.
>
> So far I don't understand what the problem is. The Multigen CAT
> implementation
> of ASD does just that, picks out the most significant points for each LOD,
> working
> from coarsest to finest, injecting new points to each LOD to better
> approximate the
> surface.

If, on the other hand, you have a specific terrain surface at the
highest LOD that correlates with other databases, then MultiGen's CAT is
of no value.

Dan

>
> >> ------------------------------
> >> Lee Willis Virtual Landscape Dermatologist
> >>
> >> lwillis++at++terrex.com TERREX
> >>
>
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Dan Brockway                          voice: (972) 960-2301
Paradigm Simulation Inc.              fax:   (972) 960-2303
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