面对面交锋：出刀之前先站好位

mir8-duel

local MONSTER_DIRS = { 0, 2, 3, 4, 5, 6 }        -- 怪的六个可用方向档

function gameActor:FaceDir2(targetX)             -- 人物: 两向
    self._dir = targetX >= self._x and 2 or 6    -- 2右 6左
end

function gameActorMonster:FaceDir6(targetX, targetY)
    local dx, dy = targetX - self._x, (targetY - 10) - (self._y - 20)
    local deg = ((math.atan2(dy, dx) * 57.29577951 + 90) + 360) % 360
    local best, bestDiff = 0, 999
    for _, d in ipairs(MONSTER_DIRS) do
        local diff = math.min(math.abs(deg - d * 45), 360 - math.abs(deg - d * 45))
        if diff < bestDiff then bestDiff, best = diff, d end
    end
    self._dir = best
end

-- 交战双方每帧对表
function combatPair:UpdateFacing()
    self._player:FaceDir2(self._monster:GetX())
    self._monster:FaceDir6(self._player:GetX(), self._player:GetY())
end

-- 出刀前强转校验
function combatPair:OnAttack()
    self:UpdateFacing()
    self._player:PlayAction(global.MMO.ANIM_ATTACK)
end