Re: Altering Geometry
Lionel Maiaux (maiaux++at++quartz.corys.fr)
Wed, 8 Nov 1995 18:57:47 +0100
On Nov 8, 9:24am, David Russell wrote:
> Subject: Altering Geometry
> Given that Performer operates best of staic geometry data, has anyone else
> tried to alter the geometry of a scene on the fly? I've seen systems that
> alter vertices of geosets in order to produce dynamic terrain, fluid, etc.
> that work produce relatively fast response. Unfortunately, for my
> application, this approach doesn't work. I am required to generate all of
> the geosets, etc. for the new geometry each time a change is necessary.
>
> Now that I've rambled on, does anyone have any experience with generating
> and swapping new geometry into the Performer tree? I'm mostly interested
> in any tricks to help increase the speed of response. We have a GL based
> test program which only takes about a second to update where the Performer
> based program requires nearly five seconds to change the geometry on the
> same machine.
>
> Thanks for reading this far into my ramblings. Hope someone out there can
> give me some feedback.
>
> David Russell |
> Visual Systems Lab | Static worlds breed
> Institute for Simulation and Training | static minds.
> |
> drussell++at++vsl.ist.ucf.edu | CHANGE YOUR (virtual) WORLD!
>
>
>
>-- End of excerpt from David Russell
I Think the best way to change geometries in Performer are:
- change switch selection (you must produce ALL your geometries before
simulation),
- change vertex coordinates of existing geometries,
For a lot of simulation application (may be not yours), 1 second or 5 seconds
are not "acceptable" (english word?)
This archive was generated by hypermail 2.0b2
on Mon Aug 10 1998 - 17:52:01 PDT