Path: utzoo!mnetor!uunet!husc6!hao!gatech!mcnc!decvax!decwrl!sun!plx!dlb!dana!rap
From: rap@dana.UUCP (Rob Peck)
Newsgroups: comp.sys.amiga
Subject: Re: Info on Blitter Line Drawing
Message-ID: <288@dana.UUCP>
Date: 13 Jan 88 20:20:54 GMT
References: <2374@cup.portal.com> <3131@cbmvax.UUCP> <287@dana.UUCP>
Organization: Dana Computer, Inc., Sunnyvale, CA
Lines: 12
Summary: forgot to add this...


In my last posting, I forgot to add that the USE_D omission need
not be done if the collision detect is being done between two masks
of objects in a contrived background plane, and the AND function
between the second object and the background is used.  If you
are looking at collisions between an object and a background item
that is not defined as an object, there is a lot more work involved.
For QIX, I would believe that there is a lot less overhead to checking
the collisions between the end points of the line and the locations of
predrawn boxes than the overhead involved in setting up the blitter.

Rob Peck				...ihnp4!hplabs!dana!rap