铜钱镖：借墙弹你没商量

 fx-ricochet

local Ricochet = {}
local KEY = { GRAVITY = 190 }

local coin = nil

function RC.Throw()
    if coin then return end
    coin = {
        x = SL:GetValue("actorX") + 24,
        y = SL:GetValue("actorY") - 60,
        vx = 420, vy = -160,
        bounces = 0, maxB = SL:GetValue("maxBounce") or 2
    }
    SL:PlayActorAct("player", "attack")
    SL:PlaySfx("coin_flick")
end

function RC.Tick(dt)
    if not coin then return end
    coin.vy = coin.vy + KEY.GRAVITY * dt
    coin.x = coin.x + coin.vx * dt
    coin.y = coin.y + coin.vy * dt
    coin.rot = coin.rot + dt * 12
    -- 四壁反弹
    local bounced = false
    if coin.x < 20 then coin.x = 20; coin.vx = math.abs(coin.vx); bounced = true end
    if coin.x > SL:GetValue("width") - 20 then
        coin.x = SL:GetValue("width") - 20
        coin.vx = -math.abs(coin.vx)
        bounced = true
    end
    if coin.y < 16 then coin.y = 16; coin.vy = math.abs(coin.vy); bounced = true end
    if coin.y > SL:GetValue("groundY") - 6 then
        coin.y = SL:GetValue("groundY") - 6
        coin.vy = -math.abs(coin.vy)
        bounced = true
    end
    if bounced then
        coin.bounces = coin.bounces + 1
        SL:PlayBurst(coin.x, coin.y, "coin_spark", 4)
        SL:PlaySfx("coin_wall")
    end
    -- 命中: 伤害随弹跳数递增
    local target = SL:GetValue("curTarget")
    if math.abs(coin.x - SL:GetValue("actorX", target)) < 24
       and math.abs(coin.y - (SL:GetValue("actorY", target) - 60)) < 30 then
        SL:DeductHp(target, 14 + coin.bounces * 6)
        SL:ShowHitNum(target, 14 + coin.bounces * 6, "coin")
        SL:ScreenShake(0.2, 3)
        coin = nil
    end
end

return RC