Subject: Re: [stella] Arrrg, Arrrg, and Double Arrrg!!!|
From: Chris Cracknell <crackers@xxxxxxxx>
Date: Wed, 15 Apr 1998 17:09:52 -0400 (EDT)
In article <199804150534.WAA24392@fmul55>, you wrote: >What about the sprite control registers (can't remember what they're called)? >Did you set them to one copy only? Maybe they're set to 3 copies instead... >Are the black lines vertical, or horizontal? ~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~ Nope, the sprites were copied vertically and the black lines were horizontal. But it's all moot now as the problem has been fixed. Although why the problem existed at all is still somewhat of a mystery to me. For some reason or another my "blow" routine (draw blank scanlines) was crapping out before reaching zero. Replaced the BPL with BNE and everyone was happy. Basically the purpose of that bit of experimental code was because I wanted to how many horizontal positions I could get for a sprite by just using the RESP command on it's own without an HMOVE to fine tune it. It would appear that RESP will give you 10 different horizontal positions on it's own (that is provided you don't overshoot a single scanline with your delay routine). Kind of sucks really, I was hoping to get enough to be able to fudge an okay horizontal motion at slower speed without having to use an HMOVE table. But still, it's a good place to start for a multisprite movement tutorial. It'll be very easy to add more vertical copies of the sprites to this simple program and have them all move at their own indipendant rates. CRACKERS (LCD Game Watch animation from hell!!!) -- Accordionist - Wethifl Musician - Atari 2600 Collector | /\/\ *NEW CrAB URL* http://www.hwcn.org/~ad329/crab.html ***| \^^/ Bira Bira Devotee - FES Member - Samurai Pizza Cats Fan| =\/= -- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/stella.html Don't post pirate BINs to Stellalist. Be a programmer, not a pirate. Write the best game, win framed autographs of famous Atari alumni!!