换魂：你的血换它的命，一半对一半

 fx-soulswap

-- @file SoulSwap.lua
-- 换魂 —— 你的血换它的命，一半对一半

local SoulSwap = {}

local CONST = {
    SWAP_CD      = 12.0,
    SWAP_RATIO   = 0.5,
    MY_HP_MAX    = 320,
    FOE_HP_MAX   = 1200,

    COLOR_SWAP   = "#60c8a8",
    COLOR_DEEP   = "#1a4a3a",
    COLOR_GHOST  = "#d8f5e8",

    ZORDER_FX    = 135,
    AUTOINC_BASE = 970000,
}

local _cdLeft    = 0
local _scheduler = nil
local _autoInc   = 0

local function GenID(prefix)
    _autoInc = _autoInc + 1
    return string.format("%s_%d", prefix or "SLS",
        CONST.AUTOINC_BASE + _autoInc)
end

local function GetActorPos(id)
    if not id then return nil end
    local x = SL:GetValue("ACTOR_POSITION_X", id)
    local y = SL:GetValue("ACTOR_POSITION_Y", id)
    if not x or not y then return nil end
    return { x = x, y = y }
end

local function SafeRemove(node)
    if node and not GUI:Widget_IsNull(node) then
        GUI:removeFromParent(node)
    end
end

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

-- 换魂入口
function SoulSwap.Cast()
    if _cdLeft > 0 then return end
    local myID = SL:GetValue("USER_ID")
    local tid = SL:GetValue("MARK_TARGET_ID")
    if not tid then return end
    local myHp = SL:GetValue("ACTOR_HP", myID)
    local foeHp = SL:GetValue("ACTOR_HP", tid)
    if not myHp or not foeHp then return end
    _cdLeft = CONST.SWAP_CD
    local myHalf = math.floor(myHp * CONST.SWAP_RATIO)
    local foeHalf = math.floor(foeHp * CONST.SWAP_RATIO)
    local myNew = myHp - myHalf + foeHalf
    local foeNew = foeHp - foeHalf + myHalf
    if myNew <= 0 then
        ShowTip("你险些被换死——残血别乱换残血别乱换。残血别乱换。换魂的青光特效也要双向——从你身上飞出去的青光和从它身上飞回来的绿光在半场交汇——交汇的那一帧就是血量互换的那一帧。")
        return
    end
    if foeNew <= 0 then
        foeNew = 1
    end
    SL:SetActorHP(myID, myNew)
    SL:SetActorHP(tid, foeNew)
    SL:TipAboveMe((myNew > myHp and "+" or "") ..
        (myNew - myHp))
    SL:TipAbove(tid, (foeNew > foeHp and "+" or "") ..
        (foeNew - foeHp))
    SL:PlaySwapFx()
end

if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
    end, 0.02)
end

SL:ScheduleOnce(function()
    ShowTip("技能已加载: 换魂 (调试按钮触发)")
end, 1.0)

return SoulSwap