For some reason I never saw the original post on this thread, but if you are
looking for fast polygon routines on vga on a PC, you really can't go past
the mode X stuff from Dr Dobbs. This code is all p.domain (as far as I know),
and in the original articles, the routines were all presented as dumb vga
routines, and then optimised to modeX with some interesting discussion along
the way.
If you are interested, I could find out more details of the issues in question,
(I have them at home).