大转盘：转完了才知道是什么

fx-wheel

local LuckyWheel = {}
local CONST = { KEY = "LuckyWheel", SEG_COUNT = 8, DURATION = 4 }

function LuckyWheel.OnSpin(myID)
    SL:SendLuaNetMsg(CONST.MSG_ID, 0, 0, 0,
        SL:JsonEncode({ key = CONST.KEY, op = 1, actorID = myID }))
end

SL:RegisterLuaNetMsg(CONST.MSG_ID, function(_, p1, p2, p3, msgData)
    local d = SL:JsonDecode(msgData)
    if d.key ~= CONST.KEY or d.op ~= 2 then return end
    local prizeIdx = d.prizeIndex
    local targetAngle = (prizeIdx + 0.5) / CONST.SEG_COUNT * math.pi * 2
    local extraTurns = 5 * math.pi * 2
    LuckyWheel._spin = {
        startAngle = LuckyWheel._angle or 0,
        endAngle = LuckyWheel._angle + extraTurns + targetAngle,
        t = 0, dur = CONST.DURATION
    }
end)

function LuckyWheel:Update(dt)
    if not self._spin then return end
    self._spin.t = self._spin.t + dt
    local p = math.min(1, self._spin.t / self._spin.dur)
    local ease = 1 - math.pow(1 - p, 3)
    self._angle = self._spin.startAngle + (self._spin.endAngle - self._spin.startAngle) * ease
    if p >= 1 then
        self._spin = nil
        self:HighlightPrize()
        self:ShowReward()
    end
end

return LuckyWheel