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102 lines
4.1 KiB
102 lines
4.1 KiB
/****************************************************************************
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Copyright (c) 2017-2023 Xiamen Yaji Software Co., Ltd.
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http://www.cocos.com
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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of the Software, and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#ifndef __CCMATHBASE_H__
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#define __CCMATHBASE_H__
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#include <memory>
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#include "base/Macros.h"
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#if CC_PLATFORM != CC_PLATFORM_EMSCRIPTEN
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#include "base/std/hash/hash.h"
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#endif
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/**
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* @addtogroup base
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* @{
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*/
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/**Util macro for conversion from degrees to radians.*/
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#define MATH_DEG_TO_RAD(x) ((x)*0.0174532925f)
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/**Util macro for conversion from radians to degrees.*/
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#define MATH_RAD_TO_DEG(x) ((x)*57.29577951f)
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/**
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@{ Util macro for const float such as epsilon, small float and float precision tolerance.
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*/
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#define MATH_FLOAT_SMALL 1.0e-37f
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#define MATH_TOLERANCE 2e-37f
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#define MATH_PIOVER2 1.57079632679489661923f
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#define MATH_EPSILON 0.000001f
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/**@}*/
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//#define MATH_PIOVER4 0.785398163397448309616f
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//#define MATH_PIX2 6.28318530717958647693f
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//#define MATH_E 2.71828182845904523536f
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//#define MATH_LOG10E 0.4342944819032518f
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//#define MATH_LOG2E 1.442695040888963387f
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//#define MATH_PI 3.14159265358979323846f
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//#define MATH_RANDOM_MINUS1_1() ((2.0f*((float)rand()/RAND_MAX))-1.0f) // Returns a random float between -1 and 1.
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//#define MATH_RANDOM_0_1() ((float)rand()/RAND_MAX) // Returns a random float between 0 and 1.
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//#define MATH_CLAMP(x, lo, hi) ((x < lo) ? lo : ((x > hi) ? hi : x))
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//#ifndef M_1_PI
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//#define M_1_PI 0.31830988618379067154
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#ifdef __cplusplus
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#define NS_CC_MATH_BEGIN namespace cc {
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#define NS_CC_MATH_END }
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#define USING_NS_CC_MATH using namespace cc
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#else
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#define NS_CC_MATH_BEGIN
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#define NS_CC_MATH_END
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#define USING_NS_CC_MATH
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#endif
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NS_CC_MATH_BEGIN
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#if CC_PLATFORM != CC_PLATFORM_EMSCRIPTEN
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template <typename T, typename Enable = std::enable_if_t<std::is_class<T>::value>>
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struct Hasher final {
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// NOTE: ccstd::hash_t is a typedef of uint32_t now, sizeof(ccstd::hash_t) == sizeof(size_t) on 32 bits architecture device,
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// sizeof(ccstd::hash_t) < sizeof(size_t) on 64 bits architecture device.
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// STL containers like ccstd::unordered_map<K, V, Hasher> expects the custom Hasher function to return size_t.
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// So it's safe to return ccstd::hash_t for operator() function now.
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// If we need to define ccstd::hash_t to uint64_t someday, we must take care of the return value of operator(),
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// it should be size_t and we need to convert hash value from uint64_t to uint32_t for 32 bit architecture device.
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ccstd::hash_t operator()(const T &info) const;
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};
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// make this ccstd::hash compatible
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template <typename T, typename Enable = std::enable_if_t<std::is_class<T>::value>>
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ccstd::hash_t hash_value(const T &info) { return Hasher<T>()(info); } // NOLINT(readability-identifier-naming)
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#endif // CC_PLATFORM != CC_PLATFORM_EMSCRIPTEN
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NS_CC_MATH_END
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/**
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* end of base group
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* @}
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*/
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#endif // __CCMATHBASE_H__
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