蓄能一击：满环松手才叫响

fx-chargeup

local ChargeUp = {}
local KEY = { CHARGE_TIME = 1.4 }

local charging = nil    -- { t = 0 }

function Charge.Start(self_)
    if charging then return end
    charging = { t = 0 }
    SL:PlayActorAct(self_, "cast")
    SL:Schedule(function(dt)
        if not charging then SL:UnSchedule("chargeRun") return end
        charging.t = charging.t + dt
        local k = math.min(1, charging.t / KEY.CHARGE_TIME)
        -- 蓄力环渲染: 进度即角度
        SL:DrawRingFx("charge_ring", SL:GetValue("actorX", self_),
                      SL:GetValue("actorY", self_) - 50, k)
        -- 蓄力粒子随进度加密
        if math.random() < dt * 14 * (0.4 + k) then
            SL:PlayBurst(SL:GetValue("actorX", self_) + (math.random() - 0.5) * 40,
                         SL:GetValue("actorY", self_) - 30 - math.random() * 70,
                         "gold_mote", 1)
        end
        -- 满环爆亮
        if k >= 1 and not SL:GetValue("ringFull") then
            SL:SetValue("ringFull", true)
            SL:PlayFxAt("ring_full", SL:GetValue("actorX", self_),
                                   SL:GetValue("actorY", self_) - 50)
            SL:PlaySfx("charge_full")
        end
    end, 0.016, "chargeRun")
end

-- 引擎受击回调: 蓄力被打断
function Charge.OnBeHit(self_, damage)
    if not charging then return end
    charging = nil
    SL:SetValue("ringFull", false)
    SL:StopRingFx("charge_ring")
    SL:PlayActorAct(self_, "stuck")
    SL:ShowTipAbove(self_, "蓄力被打断!")
    SL:PlaySfx("charge_break")
end

function Charge.Release(self_, target)
    if not charging then return end
    local k = math.min(1, charging.t / KEY.CHARGE_TIME)
    local bonus = SL:GetValue("fullBonus") or 100
    local dmg = math.floor(20 * (1 + bonus / 100 * k))
    charging = nil
    SL:SetValue("ringFull", false)
    SL:StopRingFx("charge_ring")
    SL:PlayActorAct(self_, "attack")
    SL:ScheduleOnce(function()
        SL:PlayFxAt("hammer_hit", SL:GetValue("actorX", target),
                                  SL:GetValue("actorY", target) - 58)
        SL:DeductHp(target, dmg)
        SL:ShowHitNum(target, dmg, k >= 1 and "charged" or "normal")
        SL:ScreenShake(0.3, k >= 1 and 6 or 3)
        SL:PlayActorAct(target, "stuck")
    end, 0.2)
end

return ChargeUp