Re: A86: ASM Programming Test

To: assembly-86@lists.ticalc.org
Subject: Re: A86: ASM Programming Test
From: David Thomas <david_hd@yahoo.com>
Date: Wed, 2 Dec 1998 18:08:08 -0800 (PST)
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-86@lists.ticalc.org



> >> it's actually an easy problem at its barest elements (easier than
collision
> >> detction proper): all you have to do is look at the each byte of
video mem
> >> with the sprite you are checking collision with and AND it with
the byte of
> >> the sprite you are checking collision against.  If the result
isn't zero,
> >> then you'd have a collision.
> >
> >
> >Wouldn't that be true only if you are using alligned sprites, or am I
> >missing something?
> >
> if it's not aligned, you have to AND with two bytes of screen mem...
> 
Yeah, huh... that makes sense. Thanks!
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