Re: A82: FIND_PIXEL

To: assembly-82@lists.ticalc.org
Subject: Re: A82: FIND_PIXEL
From: Jkhum98@aol.com
Date: Thu, 17 Sep 1998 20:12:24 EDT
Delivered-To: assembly-82-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: assembly-82@lists.ticalc.org



>>   What would cause the standard FIND_PIXEL routine to display
>>  upside down? Its very strange, but when I replaced a FIND_PIXEL
>>  83 routine with the actual ROM call in PJ 82, everything turned
>>  upside. I need to know a solution because the 83 way causes a
>>  bad bug.
>
>the standard FIND_PIXEL routine uses (0,0) as the bottom left, not
>the top left as you might expect.
>
>~Adamman


Yeah, I've noticed this change in the Row/Col in this way also, and
it confused the hell out of me for like a couple of days... 

The sprite routines, text,     But the pixle and line routines,
and other stuff use:           and other stuff use: 

(0,0)----------(95,0)          (0,63)--------(95,63)
  |              |               |              |
  |              |               |              |
  |              |               |              |
(0, 63)-------(95,63)          (0,0)----------(95,0)

Am I right to think this? Someone clarify those for me and other people
and tell us which routine use what... thanks. =)
																--Jason K.

Prev: Re: A82: FIND_PIXEL
Next: Re: A82: FIND_PIXEL
Index(es):
- Main
- Thread