【引擎触发】刺杀剑术：隔位刺杀的位判定实现

-- 普攻触发：刺杀剑术判定
function QF.StabCheck(plr, target)
    if not plr:HasSkill("刺杀剑术") then return false end
    local dist = plr:DistTo(target)
    if dist ~= 2 then return false end
    local facing = plr:GetFacing()
    local angle = plr:AngleTo(target)
    if math.abs(angle - facing) > 30 then return false end
    -- 检查中间格是否有阻挡
    local midX, midY = plr:Peek(facing, 1)
    if plr:IsBlocked(midX, midY) then return false end
    return true
end

function UI.stabFX(plr, target)
    SL:PlayAudio(2019)
    local beam = GUI:Text_Create(battleLayer, "stab", plr.x, plr.y, 16, "#EEEEEE", "剑气")
    QF_AnimLineTo(beam, target.x, target.y)
end