Re: [Celestia-developers] Patch for flickering DSOs

[Christophe C. <elc...@ya...>]

Sorry to be late on this one... Anyway tested with last svn and all  
fine now on osX!

Le 2 mars 09 à 18:17, Chris Laurel a écrit :

> Thanks to both of you for testing this patch. I've committed it to  
> SVN and will post a new 1.6.0 release status this afternoon.
>
> --Chris
>
> On Sat, Feb 28, 2009 at 10:28 AM, Andrew Tribick <ajt...@go... 
> > wrote:
> It appears to have fixed the flicker problem for me.
>
> Andrew
>
> 2009/2/28 Selden E Ball Jr <se...@co...>:
> > For what it's worth (since I didn't see the flickering) it works  
> fine
> > for me, whether looking at M4 using the flicker position URL or from
> > large distances with high magnification.
> >
> > DSO performance and functionality seems unchanged.
> > I get 60fps on my system with a 60fps refresh rate,
> > albeit with 100% CPU usage.
> >
> > s.
> >
> >> The attached patch fixes the disappearing globular clusters that  
> were
> >> reported in the forum. The bug only happens on certain systems:  
> only Macs
> >> and 64-bit builds seem to exhibit the bug. Although the problem  
> was first
> >> reported with globular clusters, the globular code isn't at  
> fault. Instead,
> >> there's a numerical precision issue in the DSO octree traversal.  
> The frustum
> >> planes used for culling were computed at single precision. Simply  
> upgrading
> >> the calculation to double precision fixes the problem (and also  
> eliminates a
> >> lot of extra conversion between float and double.) Performance  
> should be
> >> unaffected by the change, as culling is only done per octree  
> node, and not
> >> per DSO.
> >
> >> --Chris
> >
> >  
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