水车：水冲轮转浇田亩

 fx-waterwheel

local WaterWheel = {}
local KEY = { BUCKETS = 8 }

local wheelAng, acres = 0, 0
local flowing = false

function WW.Open()
    flowing = true
    SL:PlayFxAt("gate_open", SL:GetValue("gateX"), SL:GetValue("gateY"))
end

function WW.Tick(dt)
    if not flowing then return end
    local flow = SL:GetValue("flowSpeed") or 60
    wheelAng = wheelAng + flow / 100 * 2.4 * dt
    SL:SetActorRotate("waterwheel", wheelAng)
    -- 轮斗倾倒: 每个斗转到最高点时泼水
    for b = 1, KEY.BUCKETS do
        local bucketAng = b / KEY.BUCKETS * 6.28
        local diff = math.abs(wheelAng % 6.28 - bucketAng)
        if diff < 0.1 and not SL:GetValue("bucketPoured", b) then
            SL:SetValue("bucketPoured", b, true)
            local bx = SL:GetValue("wheelX") + math.cos(bucketAng) * 84
            local by = SL:GetValue("wheelY") + math.sin(bucketAng) * 84
            SL:PlayBurst(bx, by, "water_splash", 5)
            acres = acres + 1
        elseif diff > 0.3 then
            SL:SetValue("bucketPoured", b, false)
        end
    end
    -- 每转一圈: 浇一亩田
    if wheelAng >= 6.28 then
        wheelAng = wheelAng - 6.28
        acres = acres + 1
        SL:ShowSystemTips("已浇田 " .. acres .. " 亩")
    end
end

return WW