Re: [stella] Star Fire: Shootable!

Subject: Re: [stella] Star Fire: Shootable!
From: Manuel Polik <cybergoth@xxxxxxxx>
Date: Tue, 01 Oct 2002 00:11:15 +0200
Hi there!

Rasty wrote:
>About the game, do you think it could be possible to 
avoid the flickering of
>your shots (by using missile graphics)?

I've been discussing this with Thomas quite some time 
now. While Thomas is certain it can be done with 
Missiles (I'm not! :-)), the major problem with these 
would be their color.

I cannot control their color, it'd be the color of 
whatever sprite is on the same vertical position.
So I think using the missiles will look very crappy.

Now I had the idea of using Playfield instead. I just 
finished a design-study of how a laser PF animation 
could look like:

(Sorry, I was too lazy to program it. I wanted to see 
the result first :-))

Now, the two choices are:

- Try the playfield solution as shown in the GIF
- Keep it as it is.

If the feedback here would be towards the first 
solution, I'd give it a try (with Thomas help hopefully) 
otherwise I'd continue with the current Sprite-Lasers.

Rob wrote:
> Very playable!  I eventually converted all the enemy 
> ships into little red dots and then I noticed a funny 
> artifact (this is in stella.sdl under Linux):  on the 
> right edge of the screen appears one of your shots,
> constantly moving from top to bottom as if it's an 
> enemy ship just out of your range.

Right now this is most likely due to a timing bug in 
Stella, but I'll rework that part of the code anyway, so 
the next version should display well on all emulators 
again. Thanks for the note.

> One big problem though-- the way ships just "pop" on 
> and off the screen. Any way to fix this?

It probably was solvable, but all the solutions I can 
think of would either require 8 times the ROM I use 
right now for graphics, tons of RAM or precious kernel 
cycles or all of it.

That is for the horizontal "popping". I probably might 
find easy solutions for the vertical "poppings", though.

I'll think about the problem.


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