BALLsPhysicalConstants

Are there Physical constants in BALL?

Yes, there are predefined constants in BALL/include/BALL/COMMON/constants.h

BALL offers

• AVOGADRO,
• BOHR_RADIUS,
• BOLTZMANN,
• CAL_PER_JOULE,
• DEG_PER_RAD,
• E,
• ELECTRON_MASS,
• ELEMENTARY_CHARGE,
• EPSILON,
• F,
• FARADAY,
• FINE_STRUCTURE_CONSTANT,
• GAS_CONSTANT,
• GRAVITATIONAL_CONSTANT,
• JOULE_PER_CAL,
• MM_PER_INCH,
• MOL,
• M_PER_FOOT,
• NA,
• NEUTRON_MASS,
• PI,
• PLANCK,
• PROTON_MASS,
• R,
• RAD_PER_DEG,
• SPEED_OF_LIGHT,
• VACUUM_PERMEABILITY,
• VACUUM_PERMITTIVITY

C++

#include <BALL/COMMON/constants.h>
using namespace BALL;

// Boltzmann-Constant
float b = Constants::BOLTZMANN;

// Avogardro-number
double av =  Constants::NA; 

// PI
Angle angle = Angle(Constants::PI,true));

python

from BALL import *

b = Constant.BOLTZMANN                                                                      
print b 

av =  Constant.NA
print av

angle = Angle(Constant.PI,True)
print angle