Path: utzoo!attcan!uunet!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!usc!ucsd!nosc!crash!jcs
From: jcs@crash.cts.com (John Schultz)
Newsgroups: comp.graphics
Subject: Fastest 2D line clipper
Summary: FC clipper in Assembly
Message-ID: <2130@crash.cts.com>
Date: 7 Apr 90 18:21:55 GMT
Reply-To: jcs@crash.cts.com (John Schultz)
Organization: Crash TimeSharing, El Cajon, CA
Lines: 18



  I've written the Fast-Clipper (FC) line clipper in 68000
assembly.  It's generic enough to be assembled on any 680x0
machine, and is callable from HLLs which can pass arguments
in registers (simple mods to use stack args).
  The C version of this algorithm was shown to be twice as
fast as the Cohen-Sutherland (CS) algorithm.
  A modified line demo for the Amiga has been written to use
the clipper for testing/benchmarking.
  If anyone is interested in testing the algorithm, let me
know and I'll send you a copy.  Clip.a is 11739 bytes and
cliptest.c is 3613 bytes.  If there is enough interest and
these files are not too large, I'll post, else mail direct to
those inquiring.


    John