On Mon, 10 Sep 2001, Glenn Saunders wrote:
> I "think" in terms of a coordinate space where 0,0 is at the top left of the
> screen and the scanline counter incrementing downward. It's been confusing
> as it is dealing with this decrementing scanline counter. I hate that, but
> it seems to be the standard way to do it on the 2600, having all the data
> upside down, probably because BNE is a quicker way to end a loop than
> testing for a given maximum value.
Yeah, part of programming this beast is learning that your brain is a lot more
flexible than Stella. It's pretty set in it's ways and not likely to change
anytime soon. ;)
> BTW, for those in the know, with rotating sprite games like Combat and
> Indy500, how many of the 16 frames of sprite rotation animation are stored
I think Combat only uses 5 images. Maybe less. Joe Decuir mentioned
this in his talk at CGE, but I don't remember offhand.
-Chris
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