打气球：扎中同色才能连爆

fx-balloon

local BalloonPop = {}
local KEY = { CHAIN_GAP = 0.16 }

local balloons = {}
local combo = { color = nil, n = 0 }

local function Pop(b, chained)
    b.dead = true
    SL:SetValue("popped", SL:GetValue("popped") + 1)
    -- 同色计数
    if combo.color == b.color then
        combo.n = combo.n + 1
    else
        combo.color = b.color
        combo.n = 1
    end
    SL:PlayBurst(b.x, b.y, "confetti", 9)
    SL:PlaySfx("pop", math.min(5, combo.n))
    -- 连锁: 同色伙伴延时引爆
    local chainNeed = SL:GetValue("chainNeed") or 3
    if combo.n >= chainNeed then
        for _, other in ipairs(balloons) do
            if not other.dead and other.color == b.color then
                local ob = other
                SL:ScheduleOnce(function()
                    if not ob.dead then Pop(ob, true) end
                end, KEY.CHAIN_GAP)
            end
        end
    end
end

function BalloonPop.ThrowDart(target)
    local self_ = SL:GetValue("selfActor")
    SL:PlayFlyFx("dart", SL:GetValue("actorX", self_) + 10,
                  SL:GetValue("actorY", self_) - 40,
                  nil, nil, 0, { track = target, arc = 40 },
                  function()
                      if not target.dead then
                          Pop(target, false)
                      end
                  end)
end

function BalloonPop.Update(dt)
    for _, b in ipairs(balloons) do
        if not b.dead then
            b.y = b.y + b.vy * dt
            b.sway = b.sway + dt
            b.x = b.x + math.sin(b.sway) * 14 * dt
            SL:SetFxPos("balloon" .. b.id, b.x, b.y)
            if b.y < -30 then b.dead = true end     -- 飘出屏即弃
        end
    end
end

return BalloonPop