PYTHIA
8.303

#include <Basics.h>
Public Member Functions  
Rndm ()  
Constructors.  
Rndm (int seedIn)  
bool  rndmEnginePtr (RndmEngine *rndmEngPtrIn) 
Possibility to pass in pointer for external random number generation. More...  
void  init (int seedIn=0) 
Initialize, normally at construction or in first call. More...  
double  flat () 
Generate next random number uniformly between 0 and 1. More...  
double  exp () 
Generate random numbers according to exp(x).  
double  xexp () 
Generate random numbers according to x * exp(x).  
double  gauss () 
Generate random numbers according to exp(x^2/2).  
pair< double, double >  gauss2 () 
Generate two random numbers according to exp(x^2/2y^2/2).  
pair< Vec4, Vec4 >  phaseSpace2 (double eCM, double m1, double m2) 
Generate two random vectors according to the phase space distribution. More...  
int  pick (const vector< double > &prob) 
Pick one option among vector of (positive) probabilities.  
bool  dumpState (string fileName) 
Save or read current state to or from a binary file. More...  
bool  readState (string fileName) 
Read in the state of the random number generator from a binary file. More...  
Rndm class. This class handles random number generation according to the MarsagliaZamanTsang algorithm.
bool dumpState  (  string  fileName  ) 
Save or read current state to or from a binary file.
Save current state of the random number generator to a binary file.
Open file as output stream.
Write the state of the generator on the file.
Write confirmation on cout.
double flat  (  ) 
Generate next random number uniformly between 0 and 1.
Use external random number generator if such has been linked.
Ensure that already initialized.
Find next random number and update saved state.
void init  (  int  seedIn = 0  ) 
Initialize, normally at construction or in first call.
Pick seed in convenient way. Assure it to be nonnegative.
Unpack seed.
Initialize random number array.
Initialize other variables.
Finished.
Generate two random vectors according to the phase space distribution.
Calculate phase space configuration.
Isotropic angles give threemomentum.
bool readState  (  string  fileName  ) 
Read in the state of the random number generator from a binary file.
Open file as input stream.
Read the state of the generator from the file.
Write confirmation on cout.
bool rndmEnginePtr  (  RndmEngine *  rndmEngPtrIn  ) 
Possibility to pass in pointer for external random number generation.
Method to pass in pointer for external random number generation.
Save pointer.
Done.