Re: Large Area Database

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Rob Jenkins (robj++at++sgi.com)
Mon, 26 Apr 1999 05:59:05 -0700

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MLM Veraart wrote:
>
> Devrim Erdem wrote:
> >
> > Hi,
> >
> > I have a huge terrain database where I position
> > tanks and aircrafts. The usual x and y are values
> > like 300000. As I shall expect , there are jittering
> > effects. Especially planting tanks using isectors cause
> > really bad jitter effect.
> >
> > How can avoid these effects ?
>
> You have to move the viewer to the origin and translate the terrain
> the same amount. Al calculations should be done in double and the
> results put in the performer structures (float). There is a mail in the
> archives describing this principle. I think it was Rob Jenkins who
> wrote it. It should be in the 1996/1997 archives.
>

I think I was just re-posting stuff that Michael Jones wrote. I'm pretty
sure Angus had some code/slides illustrating this for a Dev Forum once
too, not sure if they're available....

Cheers
Rob

> Mario
> >
> > thanks,
> > --
> > /*===============================================
> > M. Devrim Erdem devrim++at++infotron-tr.com
> > Chief Engineer
> > Simulation & Software Development
> > info(+)TRON, Turkey
> > http://www.infotron-tr.com
> > http://abone.turk.net/mderdem
> > ===============================================*/
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-- 
________________________________________________________________
Rob Jenkins	
SGI Graphics Consulting
Tel 0118 925 7621	
mailto:robj++at++sgi.com
http://www.sgi.co.uk

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