吐雾蚀纹：一口毒雾扇面喷，站得近蚀得深

flowchart TD
A[点吐雾] --> B[张口聚雾]
B --> C[扇面朝怪铺开]
C --> D{怪站多近}
D -- 贴脸 --> E[蚀二十六]
D -- 离远 --> F[蚀十二]
E --> G[雾粒散掉]
F --> G
G --> H[七秒后再喷]

-- @file CrestConebreath.lua
-- 吐雾蚀纹 —— 一口毒雾扇面喷 站得近蚀得深

local CrestConebreath = {}

local CONST = {
    MIST_N        = 18,
    NEAR_DMG      = 26,
    FAR_DMG       = 12,
    NEAR_LINE     = 260,
    BREATH_CD     = 7,

    AUTOINC_BASE  = 1204900,
}

local _mists    = {}
local _cd       = 0
local _autoInc  = 0

local function ShowTip(msg)
    if msg and msg ~= "" then SL:ShowSystemTips(msg) end
end

local function GenID()
    _autoInc = _autoInc + 1
    return CONST.AUTOINC_BASE + _autoInc
end

function CrestConebreath.Dmg(dist)
    if dist < CONST.NEAR_LINE then
        return CONST.NEAR_DMG
    end
    return CONST.FAR_DMG
end

-- 吐雾: 雾粒沿面向铺开
function CrestConebreath.Breath(mobDist)
    if _cd > 0 then
        ShowTip("雾还在嗓子眼——再等" .. math.ceil(_cd) .. "秒")
        return
    end
    _cd = CONST.BREATH_CD
    for i = 1, CONST.MIST_N do
        local sp = (i / CONST.MIST_N) * 0.5 - 0.25 + 0.08
        _mists[#_mists + 1] = {
            x = 230, y = 180,
            vx = math.cos(sp) * (160 + math.random() * 120),
            vy = math.sin(sp) * (60 + math.random() * 50) - 10,
            t = 0,
            life = 0.6 + math.random() * 0.4,
        }
    end
    ShowTip(mobDist < CONST.NEAR_LINE
        and "贴脸蚀" .. CONST.NEAR_DMG
        or "离远了蚀" .. CONST.FAR_DMG)
    return CrestConebreath.Dmg(mobDist)
end

if not _ticker then
    _ticker = SL:Schedule(function(dt)
        if _cd > 0 then _cd = _cd - dt end
        for i = #_mists, 1, -1 do
            local m = _mists[i]
            m.t = m.t + dt
            m.x = m.x + m.vx * dt
            m.y = m.y + m.vy * dt
            m.vx = m.vx * 0.985
            if m.t >= m.life then table.remove(_mists, i) end
        end
    end, 0.02)
end

SL:ScheduleOnce(function()
    SL:BindDebugButton("吐雾!", function()
        CrestConebreath.Breath(SL:GetValue("mobDist") or 0)
    end)
    ShowTip("技能已加载: 吐雾蚀纹")
end, 1.0)

function CrestConebreath.Unload()
    if _ticker then SL:Unschedule(_ticker) end
    _mists = {}
end

return CrestConebreath