Definitely a game by game... Eckhard showed me how my code had
everything moving by two lines up or down each frame and single scan
precision wasn't just unnecessary, it was downright silly! When I had
things moving one line at a time, things looked like molassas, so for my
demo double scan was the only way to go (different objects on even
versus odd helped the kernel as well).
<<
In my case I need it beause the cars will accelerate and decelerate so
coarse vertical movement will be easily detectable as jerky, especially when
cars initially start moving vertically.
I agree that it's okay for more constant animation where you are moving 2+
scanlines to reach a certain minimum speed anyway.
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