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- /*
- ---------------------------------------------------------------------------
- Open Asset Import Library (assimp)
- ---------------------------------------------------------------------------
- Copyright (c) 2006-2025, assimp team
- All rights reserved.
- Redistribution and use of this software in source and binary forms,
- with or without modification, are permitted provided that the following
- conditions are met:
- * Redistributions of source code must retain the above
- copyright notice, this list of conditions and the
- following disclaimer.
- * Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the
- following disclaimer in the documentation and/or other
- materials provided with the distribution.
- * Neither the name of the assimp team, nor the names of its
- contributors may be used to endorse or promote products
- derived from this software without specific prior
- written permission of the assimp team.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- ---------------------------------------------------------------------------
- */
- #pragma once
- #ifdef __GNUC__
- # pragma GCC system_header
- #endif
- /** @file MathFunctions.h
- * @brief Implementation of math utility functions.
- *
- */
- #include <limits>
- namespace Assimp {
- namespace Math {
- /// @brief Will return the greatest common divisor.
- /// @param a [in] Value a.
- /// @param b [in] Value b.
- /// @return The greatest common divisor.
- template <typename IntegerType>
- inline IntegerType gcd( IntegerType a, IntegerType b ) {
- const IntegerType zero = (IntegerType)0;
- while ( true ) {
- if ( a == zero ) {
- return b;
- }
- b %= a;
- if ( b == zero ) {
- return a;
- }
- a %= b;
- }
- }
- /// @brief Will return the greatest common divisor.
- /// @param a [in] Value a.
- /// @param b [in] Value b.
- /// @return The greatest common divisor.
- template < typename IntegerType >
- inline IntegerType lcm( IntegerType a, IntegerType b ) {
- const IntegerType t = gcd (a,b);
- if (!t) {
- return t;
- }
- return a / t * b;
- }
- /// @brief Will return the smallest epsilon-value for the requested type.
- /// @return The numercical limit epsilon depending on its type.
- template<class T>
- inline T getEpsilon() {
- return std::numeric_limits<T>::epsilon();
- }
- /// @brief Will return the constant PI for the requested type.
- /// @return Pi
- template<class T>
- inline T aiPi() {
- return static_cast<T>(3.14159265358979323846);
- }
- } // namespace Math
- } // namespace Assimp
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