🚀 go-pugleaf

> I tend to think that UW is all texture mapping since it makes none of 
> the simplifying assumptions that Wolf3d did.  But I'm not quite sure
> what the limitations of perspective mapping are, since it's still
> a bastard term that's in need of a concrete definition.  I know
> that it's a subset of general texture mapping, but what doesn't it
> include?

I don't think a concrete definition has been set for it.  The best (and
one I use) is from DPaint II Enhanced.  Their perspective mapping (not
texture mapping, mind you) is not like what my routine did.  Mine
was simple, only handling one instance.  Theirs handled any rotation
angle on a perspective.  Thus, that is where I believe perspective
mapping came into play on UW.  For instance, only few walls are actually
rounded.  The others are just rotated on an angle...thus allowing for
"perspective mapping".

Josh