3 Copyright (C) 2015 Nerzhul, Loic Blot <loic.blot@unix-experience.fr>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as published by
7 the Free Software Foundation; either version 2.1 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 #ifndef FACE_POSITION_CACHE_HEADER
21 #define FACE_POSITION_CACHE_HEADER
27 #include <unordered_map>
31 * This class permits caching getFacePosition call results.
32 * This reduces CPU usage and vector calls.
34 class FacePositionCache {
36 static const std::vector<v3s16> &getFacePositions(u16 d);
39 static const std::vector<v3s16> &generateFacePosition(u16 d);
40 static std::unordered_map<u16, std::vector<v3s16>> cache;
41 static std::mutex cache_mutex;