Starfields (Re: [stella] Star Voyager)

Subject: Starfields (Re: [stella] Star Voyager)
From: Manuel Polik <cybergoth@xxxxxxxx>
Date: Fri, 08 Feb 2002 22:38:49 +0100
Hi Eckhard!

>It's like that on a real VCS as well. But at least
>that means that there is still room for improvement
>when you write your Star Fire game. ;-)

Thanks for confirming that!
So I'll continue my starfields analysis with Star 
Raiders and Starmaster, not wasting any more time with 
that bug collection :-)

Hm... talking about starfields... can anyone imagine 
doing a cool & reasonable starfield without regular 
midscreen RESBLs?

Just with some clever fine-movements?

I' spent some time thinking about it, but I don't think 
it's possible, without either sacrificing loads of RAM 
or ROM, too much in both cases I can think of...

Besides, without RESBL, I think one is limited to a 
vertical distance of at least (160/2)/7 -> 12 lines from 
one star to another, which should result in a rather 
crappy looking starfield and not too many stars either 
in a 2LK...

Somebody here to prove me wrong with some clever 
mathematical/HMOV tricks? ;-)

Hm... with a RESBL every nth line, I doubt one could do 
any enemy spaceships with higher resolution than 16 
pixels, since the RESBL must be exactly doable on any 
horizontal position, as well as any further GRPX write 
must be timed exactly...

Hm... When I RESBL to either pixel 0 or 80 every 6th 
line or to pixel 0,40,80 or 120 every 3rd line...

Hm... hm... have to think another XX hours 'bout that... 


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