滚石轰隆：石头滚到你没脾气

rock.vx = rock.vx + accel * dt * 1.4

fx-boulder

local Boulder = {}
local KEY = { ACCEL = 1.4, R = 26 }

local rock = nil

function BL.Push(self_)
    if rock then return end
    rock = {
        x = SL:GetValue("actorX", self_) + 40,
        vx = 130,
        rot = 0
    }
    SL:PlayActorAct(self_, "cast")
    SL:ScreenShake(0.14, 2)
    SL:ShowSystemTips("巨石启动 — 越滚越快!")
end

function BL.Tick(dt)
    if not rock then return end
    local accel = SL:GetValue("rockAccel") or 100
    rock.vx = rock.vx + accel * dt * KEY.ACCEL / 100
    rock.x = rock.x + rock.vx * dt
    rock.rot = rock.rot + rock.vx * dt / KEY.R
    SL:SetActorRotate("boulder", rock.rot)
    SL:SetActorX("boulder", rock.x)
    -- 尘土按速度配量
    if math.random() < dt * (rock.vx / 4) then
        SL:PlayBurst(rock.x - KEY.R, SL:GetValue("groundY") - 4,
                     "dust", 1)
    end
    -- 命中判定
    local target = SL:GetValue("curTarget")
    local tx = SL:GetValue("actorX", target)
    if rock.x >= tx - 30 then
        SL:ScreenShake(0.38, 7)
        SL:PlayFxAt("rock_hit", tx, SL:GetValue("actorY", target))
        SL:DeductHp(target, 48)
        SL:ShowHitNum(target, 48, "boulder")
        SL:PlayActorAct(target, "stuck")
        SL:KnockBack(target, 60)
        SL:PlayFxAt("rock_stop", rock.x, SL:GetValue("groundY") - KEY.R)
        rock = nil
    end
end

return BL