Re: [stella] missile vs. player copies

[Glenn Saunders <cybpunks@xxxxxxxxxxxx>]

At 11:53 PM 2/7/2001 +0100, you wrote:
> But i still do not understand how exactly they managed
> to draw those extra large objects.


By manipulating the player width and horizontal position you can create the 
illusion of wider sprites.

In extreme cases, with the missiles as discussed, you can give the illusion 
that the missile objects are sprites, with some limitations to shape, of 
course.  But with the players, you can get a wider variety of shapes.

For instance, by shearing or italicizing the sprite, you can stretch its 
total width.  Stampede does this, doesn't it?

You can also do the six-char thing (Dragster) or the 4-char thing 
(Dragonstomper) which I assume you can contract down to a 2-Char thing as 
well (sprites set for double-one rewrite between).  I don't know how much 
time would be left on those scanlines with a dynamic 2-char to do anything 
else vs. a 4 or 6 char.

For very large, mostly stationary or just vertically moving objects, you 
can use playfield.  Take Cosmic Ark for instance, asteroids wave.

And you can use wide swaths of playfield as filler pixels and the sprites 
as finer detail, but that would be pretty limited too.






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