00001 #if !defined CONSTANT_H
00002 #define CONSTANT_H
00003
00004 #include <string>
00005 using namespace std;
00006
00007 namespace MATH_CONSTANT
00008 {
00009 static const double PI = 3.1415926535897932384626433832795;
00010 static const double SQRT2 = 1.4142135623730950488016887242096;
00011 }
00012
00013 namespace PHYSICAL_CONSTANT
00014 {
00015 static const double PLANCK_CONSTANT = 6.62617E-34;
00016 static const double CELERITY = 299792458.;
00017 }
00018
00019 namespace MONO_CONSTANT
00020 {
00021 static const double THETA_BRAGG_CONSTANT = 12.39841857;
00022 static const double SI111_MAILLE_PARAMETER_CONSTANT = 5.4309;
00023 }
00024
00025 #endif
00026