Michael T. Jones (mtj++at++babar.asd.sgi.com)
Tue, 29 Apr 1997 08:52:58 -0700
> I am interested in implementing the continuously adaptive
terrain features
> in the Active Surface Definition (ASD) library (pfTerrain).
Just to be clear about this, IRIS Performer's Active Surface
Definition
library (ASD) is a general purpose morphing geometry package and
includes several examples of how to build the internal data
structures.
The flexibility of ASD allows developers to control how and when
the
surface morphs.
The phrase "continuously adaptive terrain" comes from MultiGen,
a
well-known database tool provider. They have a special approach
to
using our ASD features, tools to generate data in their format,
and
a clever refinement & morphing algorithm.
I think that both ASD and CAT are great, but they are different
layers of software for solving the "multiple simultaneous LOD"
problem for large databases, and I don't want to confuse the two
since there are other companies that are building tools for ASD
exploitation that will not (so far as I know ) be using
MultiGen's
unique CAT approach, and some for whom terrain is not at all
the type of surface they're interested in.
> The man pages state:
>
> "The libpfs source code, object code and documentation are
provided as
> unsupported software."
>
> Where does this source code live? Is it part of Performer 2.1?
I am
> currently on Performer 2.0.2 but am migrating to Performer 2.1
shortly.
It's in Performer 2.1 and an extended version is in beta test
right now.
> Has anyone worked with the ASD libraries and cat features?
Any inputs of
> your experience, locations of examples of pfTerrain would be
welcome.
Check with Jenny Zhao (zhz++at++asd.sgi.com) for ASD questions.
--praesto et persto, Phone:415.933.1455 Fax:415.965.2658 MS:8U-590 Michael T. Jones Silicon Graphics, Advanced Graphics Software, SSG mtj++at++sgi.com 2011 N. Shoreline Blvd., Mtn. View, CA 94039-7311 120 Mario 64 Stars OpenGL/ImageVision/OpenInventor/Performer/Cosmo3D ======================================================================= 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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