--Sonic Heroes-style jumping animation by Zarosguth,
--Reusable, please give proper credit.

--Whitelist of skins that get the Heroes-style jumping animation:
local whitelist = {"sonic","tails","knuckles","amy","fang","metalsonic"}

local function onWhiteList(player, list)
	for _, skin in pairs(list) do
		if player.mo.skin == skin return true end
	end
	return false
end

addHook("PlayerThink", function(p)
	local mo = p.mo
	if not (p and p.valid) return end --Check whether Player exists
	if not onWhiteList(p, whitelist) return end --Check whether Player's skin is on the whitelist
	//if skins[mo.skin].flags & SF_NOJUMPSPIN return end --Check whether Player spins while jumping by default

	p.charflags = $|SF_NOJUMPSPIN --Disable vanilla jumpspin

	if p.pflags & PF_JUMPED
	and p.panim ~= PA_ABILITY
	and not (p.pflags & PF_THOKKED)
		local apex = FixedMul(4*mo.scale, min(skins[mo.skin].jumpfactor, FRACUNIT)) --Determine jump apex,
		if mo.eflags & MFE_UNDERWATER --Correct for being underwater,
			apex = 117*$/200
		end

		if mo.momz > -apex and mo.momz < apex --while at apex of jump,
			if mo.state ~= S_PLAY_ROLL
				mo.state = S_PLAY_ROLL --Spinning animation
			end
		else

			if not (mo.eflags & MFE_VERTICALFLIP) and mo.momz > 0 --when going up,
			or mo.eflags & MFE_VERTICALFLIP and mo.momz < 0 --or down in reverse gravity,
				if mo.state ~= S_PLAY_JUMP
				and mo.state ~= S_PLAY_SPRING
					mo.state = S_PLAY_JUMP --Jumping animation
				end
			end

			if not (mo.eflags & MFE_VERTICALFLIP) and mo.momz < 0 --when going down,
			or mo.eflags & MFE_VERTICALFLIP and mo.momz > 0 --or up in reverse gravity,
				if mo.state ~= S_PLAY_FALL
					mo.state = S_PLAY_FALL --Falling animation
				end
			end
		end
	elseif p.pflags & PF_THOKKED
	and not (p.prevpflags & PF_THOKKED)
	and p.panim ~= PA_ROLL
		if p.charability == CA_THOK
		or p.charability == CA_JUMPTHOK
		or p.charability == CA_HOMINGTHOK and p.homing
			mo.state = S_PLAY_ROLL --Set rolling animation when using a thok ability
		end
	end
	p.prevpflags = p.pflags
end)