Re: [Mesa3d-users] Where or where have my polygons gone?

[Stephen J B. <sj...@ht...>]

On Wed, 12 Apr 2000, Evan M. Carey wrote:

> I'm making a 2D map.  Some of the polygons in this map are very very
> small.  It appears that if a polygon is sufficiently small Mesa throws
> it out.  I've got sections of my map which are always going to be
> composed of _lots_ of little polygons and when they are not rendered I
> end up with a big hole in the map.  If I change my orthographic
> projection to look closer in at the hole I see that the geometry for the
> polygons is valid cause they'll show up at close inspection.
 
I agree that Mesa should not throw out polygons no matter how
small - for precisely the reason you say...and the OpenGL specification
does not permit such a thing to be done.  However, I'm pretty sure I
heard of such an "optimisation" being added to Mesa (and I protested at
the time).

Steve Baker                      (817)619-2657 (Vox/Vox-Mail)
L3Com/Link Simulation & Training (817)619-2466 (Fax)
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