Players afterimages have been colorized & flicker, ala Sonic Advance 2. The number of afterimages you get extends with how many boosts you have stacked.
Item afterimages have also been given a basic colorization.
* Ranges between full brightness to half-brightness (50% of fullbright effect).
* Has both software and GL support (I think - GL needs to be doublechecked, but I think it's just GL being murky in general).
* Used by Rings.
* Backport FF_GLOBALANIM and FF_RANDOMANIM extensions to FF_ANIMATE from 2.2.
* Rings use the former instead of their own hacky solution to the problem.
* Also backport FF_VERTICALFLIP, because why not.
* Inverts sprite relative to gravity. I remember wanting this for the flipped death sprite for Jawz, but then Oni drew his own frame for that, so it doesn't matter.
* Refactor vissprite struct a tad, given I did so in internal where I pulled most of these improvements from.
* Should be no in-game affect; let me know if you notice any regressions.
- Re-enable ring respawn
- Make Attraction Shield chasing rings faster
- Combi-band is invisible to non-affected players
- Used rings animate faster
- Sync ring animation to a global timer
- Thunder Shield now attracts rings
- Colorize the ring counter at max yellow
- Rings in the collecting animation are considered for determining if you can't pick up rings anymore, preventing a LOT of rings being deleted from the map over time.
- Flung rings don't lose speed over time anymore
- Flund rings last way longer
- Using rings is much less touchy (holding the button from before an item roulette will let you continue using them until you let go, using certain items won't make you use a couple rings afterwards)
- 0 rings is now counted as debt when getting hit, making debt easier to get out of (getting hit by a spike now would put you at -2 instead of -5)
- Move Super Ring toward the end of the item (so I don't have to modify gfx.kart to fix dropped items)
