[Mesa3d-users] Mesa/Linux 3D Ring Shaped Dropouts in lines on an Earth Globe

[Mike G. <mwg...@ze...>]

I have Redhat Linux 7.0 installed on three very different PCs, but I get
the same drawing effect on each.

We are drawing an earth globe, with SOLID 3D lines drawn slightly above
the surface to mark off latitudes, longitudes and country boundaries,
among other things.  

The LINES are broken (the globe shows through) in a series of circular
patterns, radiating out from the viewpoint center.  Lines drawn well
away from the globe do NOT have this dropout effect.

I thought this might be a Z-buffer computational effect, so I recompiled
Mesa with 32 bits set for the DEPTH BUFFER.  This had no effect on the
display.  

Does anyone know what the problem is, and what I can to do to eliminate
it??


Note: The program works perfectly on SGI computers.  


-- 
BOEING - PHANTOM WORKS <> Michael W. Gilbertson
Systems Analysis       <> mailto:mic...@bo...
Seal Beach, Calif.     <>