RE: [stella] A new generation--offa stella list?

Subject: RE: [stella] A new generation--offa stella list?
From: <richbon-lists4800@xxxxxxxxxxxxxx>
Date: Tue, 3 May 2005 22:30:36 -0400
Hey all...

Well, seeing as this thread wonders about the neubies out there, and 
since I am one, I thought I'd speak up.

I actually found [stella] first, and only found the AtariAge forums 
recently.  After giving myself a crash-course on microcontroller 
programming in the last year or two, I decided to try my hand at a 2600 
homebrew.  A little googling on the matter turned up some links, among 
which were Kirk's 101 document, the Stella .pdf, the dig archives.  
Kirk's document was my first real exposure to what was really going on 
here.  And of course, it mentions the [stella] list.  So I joined and 
I've been lurking a few weeks.  It's been interesting.

I like the list because it's easy to follow along, and because AtariAge 
gets blocked by the proxy at work.  :-(

So as long as I'm speaking up, perhaps you'd like to see what my 
neubiness has been up to...  I tossed a link to my current test program 

Basically, all it does right now is let you fly a little spaceship 
around the screen a la Asteroids or Space War.  It warps pretty cleanly 
 from the edges of the screen back into the opposite edges.  It uses a 
basic template I found in the list archives and it uses the battlezone 
subpixel routines from Kirk's Cookbook pages.

I have a few questions, actually, so if anyone has any thoughts...

1. The warp from edge-to-edge is pretty smooth, but it still looks like 
there's one position where it blinks out.  I can't figure out why.

2. As the ship rotates clockwise, notice when it gets to the 3 o'clock 
position, the bottom of the screen seems to lose a scanline.  As it 
rotates through 9 o'clock, it comes back.  Why?

3. I'm sure it could benefit from the skipdraw algorithm, but I still 
can't find an explanation that makes sense to me.  And am I better off 
just having "upside-down" bitmaps instead of flipping them over in code?

But what do you guys think of it so far?  I'm pretty happy with the 
smooth control.

I think ultimately, I'd love to try and build a Star Control type game, 
with a larger galaxy to fight in that sort of auto zooms when the 
players get close enough together.  Maybe let the players select 
different ships with different properties (notice, all the ship's 
flight dynamics are in variables - easy to change!)

So, hello!


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