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

[Aaron J. <jaj...@ho...>]

How about trying this,

before you render the map, scale up the size of your polygons by a factor 
large enough such that it will be displayed, you will know the size to scale 
from the smallest value in your dataset...



Aaron

>
>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).


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