Re: A86: ASM Programming Test

To: assembly-86@lists.ticalc.org
Subject: Re: A86: ASM Programming Test
From: Josh Grams <j3grams@earthling.net>
Date: Wed, 2 Dec 1998 14:32:49 -0400
Delivered-To: assembly-86-outgoing@towerguard.unix.edu.sollentuna.se
In-Reply-To: <19981202185106.10224.rocketmail@send106.yahoomail.com>
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...

--Joshua

References:

Re: A86: ASM Programming Test

From: David Thomas <david_hd@yahoo.com>