💿🐜 Antkeeper source code
https://antkeeper.com
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66 lines
1.7 KiB
66 lines
1.7 KiB
/*
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* Copyright (C) 2023 Christopher J. Howard
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*
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* This file is part of Antkeeper source code.
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*
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* Antkeeper source code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Antkeeper source code 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ANTKEEPER_GAME_ANT_GENE_FREQUENCY_TABLE_HPP
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#define ANTKEEPER_GAME_ANT_GENE_FREQUENCY_TABLE_HPP
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#include <random>
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#include <vector>
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namespace game {
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namespace ant {
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/**
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* Gene frequency table.
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*
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* @tparam T Gene type.
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*/
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template <class T>
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struct gene_frequency_table
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{
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/// Gene array.
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std::vector<const T*> genes;
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/// Weight array
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std::vector<float> weights;
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/**
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* Samples a gene from the frequency table.
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*
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* @tparam Generator Uniform random bit generator type.
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*
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* @param g Uniform random bit generator object.
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*
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* @return Randomly sampled gene.
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*/
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template <class Generator>
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const T* sample(Generator& g) const
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{
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if (genes.empty())
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return nullptr;
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std::discrete_distribution<std::size_t> distribution(weights.begin(), weights.end());
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return genes[distribution(g)];
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}
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};
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} // namespace ant
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} // namespace game
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#endif // ANTKEEPER_GAME_ANT_GENE_FREQUENCY_TABLE_HPP
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