💿🐜 Antkeeper source code
https://antkeeper.com
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75 lines
2.0 KiB
75 lines
2.0 KiB
/*
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* Copyright (C) 2020 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_MATH_HPP
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#define ANTKEEPER_MATH_HPP
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#include <cstdlib>
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#include <type_traits>
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#include <vmq/vmq.hpp>
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using namespace vmq::operators;
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inline float frand(float start, float end)
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{
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float f = (float)std::rand() / RAND_MAX;
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return start + f * (end - start);
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}
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namespace math {
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/**
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* Reinterprets data as an `N`-dimensional vector of type `T`.
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*
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* @tparam N Number of vector dimensions.
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* @tparam T Scalar type.
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* @param data Data to reinterpret.
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*/
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template <std::size_t N, typename T>
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inline vmq::vector<T, N>& as_vector(T& data)
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{
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static_assert(std::is_pod<vmq::vector<T, N>>::value);
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return reinterpret_cast<vmq::vector<T, N>&>(data);
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}
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/**
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* Reinterprets data as an `NxM` matrix of type `T`.
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*
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* @tparam N Number of columns.
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* @tparam M Number of rows.
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* @tparam T Element type.
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* @param data Data to reinterpret.
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*/
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template <std::size_t N, std::size_t M, typename T>
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inline vmq::matrix<T, N, M>& as_matrix(T& data)
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{
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static_assert(std::is_pod<vmq::matrix<T, N, M>>::value);
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return reinterpret_cast<vmq::matrix<T, N, M>&>(data);
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}
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template <class T>
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vmq::vector<T, 3> project_on_plane(const vmq::vector<T, 3>& v, const vmq::vector<T, 3>& p, const vmq::vector<T, 3>& n)
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{
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return v - n * vmq::dot(v - p, n);
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}
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} // namespace math
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#endif // ANTKEEPER_MATH_HPP
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