Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/parameterisations/gflash/include/Gamma.hh

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 25 //
 26 //
 27 //
 28 //
 29 //
 30 //---------------------------------------------------------------
 31 //  GEANT 4 class header file
 32 //
 33 //  Gamma
 34 //
 35 //  Class description:
 36 //
 37 //  Gamma function.
 38 
 39 //---------------------------------------------------------------
 40 #ifndef MYGAMMA_H
 41 #define MYGAMMA_H
 42 
 43 #include <cmath>
 44 
 45 class MyGamma
 46 {
 47   public:
 48     MyGamma();
 49     ~MyGamma();
 50 
 51     double Gamma(double z);
 52     double Gamma(double a, double x);
 53 
 54   private:
 55     double GamCf(double a, double x);
 56     double GamSer(double a, double x);
 57 
 58     // Abs
 59     static short Abs(short d) { return (d > 0) ? d : -d; }
 60     static int Abs(int d) { return (d > 0) ? d : -d; }
 61     static long   Abs(long d)   { return (d > 0) ? d : -d; }
 62     static float  Abs(float d)  { return (d > 0) ? d : -d; }
 63     static double Abs(double d) { return (d > 0) ? d : -d; }
 64     static double LnGamma(double z);
 65     static double Log(double x) { return std::log(x); }
 66     static double Exp(double x) { return std::exp(x); }
 67 };
 68 
 69 #endif
 70