【引擎触发】逐日剑法：远程剑气与朝向判定的实现

-- 技能释放触发：逐日剑法
function QF.SwordBeam(plr)
    if plr:CooldownLeft("sword_beam") > 0 then return false end
    local facing = plr:GetFacing()
    local hitSet = {}
    for step = 1, 6 do
        local nx, ny = plr:Peek(facing, step)
        local t = QF_UnitAt(nx, ny)
        if t and t.camp ~= plr.camp and not hitSet[t.id] then
            hitSet[t.id] = true
            local dmg = plr:GetAttack() * (1.2 - step * 0.1)
            QF_ApplyDamage(plr, t, dmg, "beam")
        end
        if plr:IsBlocked(nx, ny) then break end
    end
    plr:SetCooldown("sword_beam", 10)
    plr:CostMP(22)
    return true
end

function UI.beamFX(plr)
    SL:PlayAudio(2072)
    for step = 1, 6 do
        local nx, ny = plr:Peek(plr:GetFacing(), step)
        QF_Delay(step * 40, function()
            local fx = GUI:Text_Create(battleLayer, "beam" .. step, nx, ny, 18, "#66CCFF", "剑气")
            QF_AnimFade(fx)
        end)
    end
end