Re: Getting Multigen-planes from vega or performer

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Marcus Barnes (marcus++at++multigen.com)
Tue, 2 Sep 1997 15:26:04 -0700

On Sep 2, 11:49am, scheff++at++iff.fhg.de wrote:
> we try to manipulate single planes. I mean planes modeled in MultiGen.
> When we compute an intersection we get a pfGeoSet. It contains some
tri-strips
> but tri-strips are not identical to our planes. Either triangles of one plane
> are separated to different tri-strips or triangles of more than one plane are
> put together in one tri-strip.

By "planes" I assume you mean "faces" or "polygons" ...

The OpenFlight loader optimizes sibling polygons into as few geosets and (long)
t-strips as possible. It relies on pfdGeoBuilder and pfdTMesher to do the
tesselating and meshing. There is no geobuilder mode to disable initial
tesselation. You can disable retesselation by the mesher though (see the man
page).

> Is there some possibility to retrieve original MultiGen planes in Performer?

If you isolate your polygons hierarchically using groups and objects, you can
restrict tesselation and meshing to as few, sibling polygons as you like.

Regards.

--
+ Marcus Barnes, Technical Staff        mailto:marcus++at++multigen.com +
+ Multigen Inc.                         http://www.multigen.com    +
+ 550 S. Winchester Blvd.               phoneto:1-408-556-2654     +
+ Suite 500 San Jose CA 95128           faxto:1-408-261-4102       +
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