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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_RANDOM_HPP
- #define ANTKEEPER_MATH_RANDOM_HPP
-
- #include <cstdlib>
- #include <type_traits>
-
- namespace math {
-
- /**
- * Generates a pseudo-random floating point number on `[start, end)` using std::rand().
- *
- * @warning Don't forget to seed with std::srand() before using!
- *
- * @param start Start of the range (inclusive).
- * @param end End of the range (exclusive).
- * @return Pseudo-random floating point number.
- */
- template <typename T = float>
- T random(T start, T end);
-
- template <typename T>
- inline T random(T start, T end)
- {
- static_assert(std::is_floating_point<T>::value);
- constexpr T rand_max_inverse = T(1) / static_cast<T>(RAND_MAX);
- return static_cast<T>(std::rand()) * rand_max_inverse * (end - start) + start;
- }
-
- } // namespace math
-
- #endif // ANTKEEPER_MATH_RANDOM_HPP
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