霜线滑纹：冰线一拉，踩上就摔

flowchart TD
A[点滑行] --> B[荡向另一侧]
B --> C[滑过怪身]
C --> D[十点入账]
D --> E[拉一道霜线]
E --> F{它踩线了吗}
F -- 踩了 --> G[滑倒 误两拍半]
F -- 没踩 --> H[线四秒自融]
G --> H
H --> I[六秒后再滑]

 fx-crest-frostline

-- @file CrestFrostline.lua
-- 霜线滑纹 —— 冰线一拉 踩上就摔

local CrestFrostline = {}

local CONST = {
    GLIDE_TIME    = 0.7,
    LINE_TTL      = 4,
    PASS_DMG      = 10,
    SLIP_DELAY    = 2.5,
    SLIP_BONUS    = 10,
    GLIDE_CD      = 6,

    AUTOINC_BASE  = 1205300,
}

local _gliding  = false
local _t        = 0
local _dir      = 1
local _from     = 200
local _to       = 610
local _line     = nil
local _slip     = 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 CrestFrostline.Slip() return _slip end
function CrestFrostline.Dmg()
    if _slip > 0 then return CONST.PASS_DMG + CONST.SLIP_BONUS end
    return CONST.PASS_DMG
end

-- 滑行: 荡向另一侧拉线
function CrestFrostline.Glide()
    if _cd > 0 then
        ShowTip("冰刀还没磨好——再等" .. math.ceil(_cd) .. "秒")
        return
    end
    _cd = CONST.GLIDE_CD
    _gliding = true
    _t = 0
    if _dir > 0 then _from = 200; _to = 610
    else _from = _to; _to = 200 end
    ShowTip("滑!——霜线一拉它得掂量脚下")
end

if not _ticker then
    _ticker = SL:Schedule(function(dt)
        if _cd > 0 then _cd = _cd - dt end
        if _slip > 0 then _slip = _slip - dt end
        if _line then
            _line.ttl = _line.ttl - dt
            if _line.ttl <= 0 then _line = nil end
        end
        if not _gliding then return end
        _t = _t + dt
        if _t >= CONST.GLIDE_TIME then
            _gliding = false
            _dir = -_dir
            _line = { x1 = math.min(_from, _to)
                    , x2 = math.max(_from, _to), ttl = CONST.LINE_TTL }
            ShowTip("霜线拉了——四秒内它踩上就摔")
        end
    end, 0.02)
end

SL:ScheduleOnce(function()
    SL:BindDebugButton("滑行!", function()
        CrestFrostline.Glide()
    end)
    ShowTip("技能已加载: 霜线滑纹")
end, 1.0)

function CrestFrostline.Unload()
    if _ticker then SL:Unschedule(_ticker) end
    _gliding = false
    _line = nil
end

return CrestFrostline