蝗群噬纹：一团小口子，咬完就走

flowchart TD
A[点放虫] --> B[八只小口子出巢]
B --> C[摇曳追向怪]
C --> D{咬到了吗}
D -- 咬到 --> E[两点入账 口子即散]
D -- 还没 --> C
E --> F{五秒时辰到了吗}
F -- 没有 --> C
F -- 到了 --> G[余虫散场化雾]
G --> H[九秒后再放]

 fx-crest-swarm

-- @file CrestSwarm.lua
-- 蝗群噬纹 —— 一团小口子 咬完就走

local CrestSwarm = {}

local CONST = {
    SWARM_N       = 8,
    SWARM_TIME    = 5,
    BITE_DMG      = 2,
    BITE_RANGE    = 24,
    SWARM_CD      = 9,

    AUTOINC_BASE  = 1205400,
}

local _dots     = {}
local _on       = false
local _t        = 0
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 CrestSwarm.Dots() return #_dots end

-- 放虫: 八只出巢
function CrestSwarm.Release()
    if _cd > 0 then
        ShowTip("虫巢还没醒——再等" .. math.ceil(_cd) .. "秒")
        return
    end
    _cd = CONST.SWARM_CD
    _on = true
    _t = CONST.SWARM_TIME
    for i = 1, CONST.SWARM_N do
        _dots[i] = {
            x = 210, y = 180,
            vx = 60 + math.random() * 80,
            vy = -30 + math.random() * 60,
            ph = math.random() * 6.28,
        }
    end
    ShowTip("八只小口子出巢——见血就散")
end

-- 每拍推进: 追身蛇行 见血即散 时辰散场
if not _ticker then
    _ticker = SL:Schedule(function(dt)
        if _cd > 0 then _cd = _cd - dt end
        if not _on then return end
        _t = _t - dt
        if _t <= 0 then
            _on = false
            _dots = {}
            ShowTip("时辰到了——虫群散场化雾")
            return
        end
        local mobX = SL:GetValue("mobX") or 0
        local mobY = (SL:GetValue("mobY") or 0) - 64
        for i = #_dots, 1, -1 do
            local d = _dots[i]
            d.ph = d.ph + dt * 7
            d.vx = d.vx + ((mobX - d.x) * 1.6
                + math.sin(d.ph) * 70) * dt
            d.vy = d.vy + ((mobY - d.y) * 1.6
                + math.cos(d.ph) * 50) * dt
            local spd = math.sqrt(d.vx * d.vx + d.vy * d.vy)
            if spd > 170 then
                d.vx = d.vx * 170 / spd
                d.vy = d.vy * 170 / spd
            end
            d.x = d.x + d.vx * dt
            d.y = d.y + d.vy * dt
            if math.abs(d.x - mobX) < CONST.BITE_RANGE
                and math.abs(d.y - mobY) < 40 then
                table.remove(_dots, i)
                ShowTip("咬一口——" .. CONST.BITE_DMG)
            end
        end
    end, 0.02)
end

SL:ScheduleOnce(function()
    SL:BindDebugButton("放虫!", function()
        CrestSwarm.Release()
    end)
    ShowTip("技能已加载: 蝗群噬纹")
end, 1.0)

function CrestSwarm.Unload()
    if _ticker then SL:Unschedule(_ticker) end
    _on = false
    _dots = {}
end

return CrestSwarm