ASD.LUA

local function GetAlphaFromToD(tod)
	local ret = 0
	if tod >= 0 and tod < 6 then
		return 0
	elseif tod >= 6 and tod < 9 then
		ret = (0.5 * math.cos((2/6*math.pi)*tod+math.pi)) + 2.5
	elseif tod >= 9 and tod < 18 then
		ret = 3
	elseif tod >= 18 and tod < 21 then
		ret = (-0.5 * math.cos((2/6*math.pi)*tod+math.pi)) + 2.5
	elseif tod >= 21 then
		return 0
	end
	return ret - 2
end