On Jan 27,  9:13am, husein wrote:
> Subject: High detail dynamic terrain
>
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>
> Hi,
> We are looking for a tool wich enable to manage very high accuracy
> dynamic terrain (like fluids). I have tried with the Volumizer library
> and it's Performer sample (perfly without modifications and Onyx 2 with
> 4 R.M.), but the draw procces time itīs not o.k. for real time.
>
> *    Anyone have used the Volumizer library with Performer for real
> time?


I don't think Volumizer is the answer for what you want, if I understand your
request correctly.  However, I have had some experience with Volumizer and
Performer, so I'll try to answer these questions.

By real-time, I'll assume you are looking for high frame rate.  There is a new
class for Performer, pfVolume, and a Performer Loader for .tif files (assuming
they are 3D images.  This class improves performance somewhat in that it
polygonizes in the APP, and renders in DRAW.  This class and loader are
available with the latest release of Volumizer 1.2 (downloadable from sgi.com).

However, the real bottleneck in Volumizer is fill rate.  Your performance will
therefore be highly dependent on the size of your texture. Most users of Volume
Rendering are tickled pink with interactive update rates of 15 Hz and such, but
60 hz for usable volumes is usually a challenge.

> *    Can we reach the same effect by using 3D Textures ?
> *    Can anyone recomiend me a technic a part of mesh to render high
> accuracy dynamic terrain ?
>
> Can anyone offer any suggestions?    Thanks.
>

It depends on the effect you are looking for.  3D textures (not volume) might
work if you can perturb the texture coordinates or move the texture matrix to
achieve the effect.  For flowing water, I've seen a combination of dynamic mesh
and moving texture coordinates.
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