大风车：吹口气等它慢慢停

vel = math.max(0, vel - decay * dt * 20)

fx-pinwheel

local Pinwheel = {}
local KEY = { DECAY = 0.8 }

local ang, vel = 0, 0

function PW.Blow()
    vel = math.min(14, vel + 8)
    SL:PlaySfx("blow")
    -- 彩叶碎屑: 从叶尖甩出
    for i = 1, 4 do
        local a = math.random() * 6.28
        SL:PlayBurst(330 + math.cos(a) * 50,
                     150 + math.sin(a) * 50,
                     PCOL[i], 1)
    end
end

function PW.Tick(dt)
    vel = math.max(0, vel - SL:GetValue("decay") * dt * 0.2)
    ang = ang + vel * dt * 2
    SL:SetActorRotate("pinwheel", ang)
    -- 高速飘彩叶
    if vel > 6 and math.random() < dt * vel * 1.5 then
        SL:PlayBurst(330 + (math.random() - 0.5) * 90,
                     150 + math.random() * 20,
                     PCOL[math.random(4)], 1, "falling")
    end
    -- 灯串随转速闪
    local litFreq = math.floor(vel)
    SL:SetValue("lightBlinkFreq", litFreq)
    SL:SetValue("spinSpeed", math.floor(vel * 10))
end

return PW