/* Minetest Copyright (C) 2015 Nerzhul, Loic Blot <loic.blot@unix-experience.fr> This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #pragma once #include "irr_v3d.h" #include <map> #include <vector> #include <unordered_map> #include <mutex> /* * This class permits caching getFacePosition call results. * This reduces CPU usage and vector calls. */ class FacePositionCache { public: static const std::vector<v3s16> &getFacePositions(u16 d); private: static const std::vector<v3s16> &generateFacePosition(u16 d); static std::unordered_map<u16, std::vector<v3s16>> cache; static std::mutex cache_mutex; };