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83 lines
3.1 KiB
83 lines
3.1 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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#pragma once
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#include <cmath>
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#include <cstdint>
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#include "base/Macros.h"
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namespace cc {
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namespace math {
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extern CC_DLL const float PI;
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extern CC_DLL const float PI_2;
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extern CC_DLL const float PI_DIV2;
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extern CC_DLL const float PI_DIV3;
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extern CC_DLL const float PI_DIV4;
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extern CC_DLL const float PI_DIV5;
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extern CC_DLL const float PI_DIV6;
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extern CC_DLL const float PI_DIV8;
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extern CC_DLL const float PI_SQR;
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extern CC_DLL const float PI_INV;
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extern CC_DLL const float EPSILON;
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extern CC_DLL const float LOW_EPSILON;
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extern CC_DLL const float POS_INFINITY;
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extern CC_DLL const float NEG_INFINITY;
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extern CC_DLL const float LN2;
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extern CC_DLL const float LN10;
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extern CC_DLL const float LN2_INV;
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extern CC_DLL const float LN10_INV;
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extern CC_DLL const float DEG_TO_RAD;
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extern CC_DLL const float RAD_TO_DEG;
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extern CC_DLL const float MIN_FLOAT;
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extern CC_DLL const float MAX_FLOAT;
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#define CC_FLOAT_CMP_PRECISION (0.00001F)
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template <typename T>
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inline T sgn(T x) {
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return (x < T(0) ? T(-1) : (x > T(0) ? T(1) : T(0)));
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}
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template <typename T>
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inline bool isPowerOfTwo(T n) {
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return (n & (n - 1)) == 0;
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}
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inline bool isEqualF(float lhs, float rhs, float precision = 0.000001F) {
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const bool hasInf = std::isinf(lhs) || std::isinf(rhs);
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return !hasInf && (std::fabs(lhs - rhs) <= (std::fmax(std::fmax(std::fabs(lhs), std::fabs(rhs)), 1.0F) * precision));
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}
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inline bool isNotEqualF(float lhs, float rhs, float precision = 0.000001F) { // same as !isEqualF
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const bool hasInf = std::isinf(lhs) || std::isinf(rhs);
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return hasInf || (std::fabs(lhs - rhs) > (std::fmax(std::fmax(std::fabs(lhs), std::fabs(rhs)), 1.0F) * precision));
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}
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inline bool isNotZeroF(float v, float precision = 0.000001F) { // same as isNotEqualF(v, 0.0F)
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return std::isinf(v) || (std::fabs(v) > (std::fmax(std::fabs(v), 1.0F) * precision));
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}
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} // namespace math
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} // namespace cc
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