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