49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
#ifndef PST_COMMONFUNCTION_H
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#define PST_COMMONFUNCTION_H
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//#include "PostProcessingModuleConfig.h"
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#include <iostream>
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#include <vector>
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namespace pst
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{
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class CommonFunction
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{
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public:
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CommonFunction();
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public:
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// 字符串分割
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static void Stringsplit(const std::string& str, const std::string& splits,
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std::vector<std::string>& res);
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//去除字符串首尾空格
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static std::string trim(const std::string& s);
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//球坐标(角度制)转直角坐标-->点
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static void SphereToRectangularCoorSys(const double theta,
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const double phi, const double r, double& x, double& y, double& z);
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static void PolarToRectangularCoorSys(const double theta, const double r, double& x, double& y);
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//判断两个浮点数是否相等
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// ulp: units in the last place.
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template <typename T>
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typename std::enable_if<!std::numeric_limits<T>::is_integer, bool>::type
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IsAlmostEqual(T x, T y, int ulp = 2)
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{
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// the machine epsilon has to be scaled to the magnitude of the values used
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// and multiplied by the desired precision in ULPs (units in the last place)
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return std::fabs(x - y) <
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std::numeric_limits<T>::epsilon() * std::fabs(x + y) * ulp
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// unless the result is subnormal
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|| std::fabs(x - y) < std::numeric_limits<T>::min();
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}
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};
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}
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#endif // QVTK_COMMONFUNCTION_H
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