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- /*
- * Copyright (C) 2021 Christopher J. Howard
- *
- * This file is part of Antkeeper source code.
- *
- * Antkeeper source code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Antkeeper source code 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
- */
-
- #ifndef ANTKEEPER_MATH_VECTOR_TYPE_HPP
- #define ANTKEEPER_MATH_VECTOR_TYPE_HPP
-
- #include <array>
- #include <cstddef>
-
- namespace math {
-
- /**
- * An `N`-dimensional Euclidean vector.
- *
- * @tparam T Vector component type.
- * @tparam N Number of dimensions.
- */
- template <typename T, std::size_t N>
- struct vector
- {
- typedef T scalar_type;
- typedef std::array<T, N> array_type;
- scalar_type components[N];
-
- inline constexpr scalar_type& operator[](std::size_t i) noexcept { return components[i]; }
- inline constexpr const scalar_type& operator[](std::size_t i) const noexcept { return components[i]; }
- inline constexpr operator array_type&() noexcept { return reinterpret_cast<array_type&>(components[0]); }
- inline constexpr operator const array_type&() const noexcept { return reinterpret_cast<const array_type&>(components[0]); }
- inline constexpr const scalar_type* data() const noexcept { return components; };
- inline constexpr scalar_type* data() noexcept { return components; };
- inline constexpr std::size_t size() const noexcept { return N; };
- };
-
- template <typename T>
- struct vector<T, 1>
- {
- typedef T scalar_type;
- typedef std::array<T, 1> array_type;
- scalar_type x;
-
- inline constexpr scalar_type& operator[](std::size_t i) noexcept { return *((&x) + i); }
- inline constexpr const scalar_type& operator[](std::size_t i) const noexcept { return *((&x) + i); }
- inline constexpr operator array_type&() noexcept { return reinterpret_cast<array_type&>(x); }
- inline constexpr operator const array_type&() const noexcept { return reinterpret_cast<const array_type&>(x); }
- inline constexpr const scalar_type* data() const noexcept { return &x; };
- inline constexpr scalar_type* data() noexcept { return &x; };
- inline constexpr std::size_t size() const noexcept { return 1; };
- };
-
- template <typename T>
- struct vector<T, 2>
- {
- typedef T scalar_type;
- typedef std::array<T, 2> array_type;
- scalar_type x;
- scalar_type y;
-
- inline constexpr scalar_type& operator[](std::size_t i) noexcept { return *((&x) + i); }
- inline constexpr const scalar_type& operator[](std::size_t i) const noexcept { return *((&x) + i); }
- inline constexpr operator array_type&() noexcept { return reinterpret_cast<array_type&>(x); }
- inline constexpr operator const array_type&() const noexcept { return reinterpret_cast<const array_type&>(x); }
- inline constexpr const scalar_type* data() const noexcept { return &x; };
- inline constexpr scalar_type* data() noexcept { return &x; };
- inline constexpr std::size_t size() const noexcept { return 2; };
- };
-
- template <typename T>
- struct vector<T, 3>
- {
- typedef T scalar_type;
- typedef std::array<T, 3> array_type;
- scalar_type x;
- scalar_type y;
- scalar_type z;
-
- inline constexpr scalar_type& operator[](std::size_t i) noexcept { return *((&x) + i); }
- inline constexpr const scalar_type& operator[](std::size_t i) const noexcept { return *((&x) + i); }
- inline constexpr operator array_type&() noexcept { return reinterpret_cast<array_type&>(x); }
- inline constexpr operator const array_type&() const noexcept { return reinterpret_cast<const array_type&>(x); }
- inline constexpr const scalar_type* data() const noexcept { return &x; };
- inline constexpr scalar_type* data() noexcept { return &x; };
- inline constexpr std::size_t size() const noexcept { return 3; };
-
- };
-
- template <typename T>
- struct vector<T, 4>
- {
- typedef T scalar_type;
- typedef std::array<T, 4> array_type;
- scalar_type x;
- scalar_type y;
- scalar_type z;
- scalar_type w;
-
- inline constexpr scalar_type& operator[](std::size_t i) noexcept { return *((&x) + i); }
- inline constexpr const scalar_type& operator[](std::size_t i) const noexcept { return *((&x) + i); }
- inline constexpr operator array_type&() noexcept { return reinterpret_cast<array_type&>(x); }
- inline constexpr operator const array_type&() const noexcept { return reinterpret_cast<const array_type&>(x); }
- inline constexpr const scalar_type* data() const noexcept { return &x; };
- inline constexpr scalar_type* data() noexcept { return &x; };
- inline constexpr std::size_t size() const noexcept { return 4; };
- };
-
- /// 2D vector.
- template <typename T>
- using vector2 = vector<T, 2>;
-
- /// 3D vector.
- template <typename T>
- using vector3 = vector<T, 3>;
-
- /// 4D vector.
- template <typename T>
- using vector4 = vector<T, 4>;
-
- } // namespace math
-
- #endif // ANTKEEPER_MATH_VECTOR_TYPE_HPP
-
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