‘Mode 7’ affine backgrounds

Can you elaborate? How is the method different than before? I ran the demo and I see the center looks the best and both edges are equally somewhat bad, compared to the old ones where the left looks good and gets progressively worse as it goes right. Does it work similar to how I suggested by computing the center, then subtracting the half the screen width times the incremental part?

I guess I should change my Kart code to look better, so I’d just like to make sure I understand what I should change, since I’ve done a bunch of optimizing and can’t really just copy/paste other code.

Hmm… now that I think about it, it’s probably possible to get it looking better by doing multiple Affines for smaller chunks of the screen, although of course that’d be a little more processing, code, and memory… but you could get it looking nearly perfect across the entire screen that way (3 would probably look really good, 6 would probably be nearly perfect). Just compute the offsets at multiple places across the screen in higher precision, then round to the lower precision at the centers of each Affine world, and subtract half the width times dx and dy of lower precision for the start of each. Once again, it’s just in head, so there may be some reason it won’t work… but I think it’d work great. You might use too much memory, so maybe just do that for the closest 50 lines or so, since you wouldn’t notice it on the distant ones.

DogP

Yup… that’s exactly what I was thinking. My current code is based on David Tucker’s code, which I believe is like your type B.

DogP