G4MesonSplitter.cc

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#include "G4MesonSplitter.hh"
#include "Randomize.hh"

G4bool G4MesonSplitter::SplitMeson(G4int PDGcode, G4int* aEnd, G4int* bEnd)
{
        G4bool result = true;
        G4int absPDGcode = std::abs(PDGcode);
        if (absPDGcode >= 1000) return false;
        if(absPDGcode == 22)
        {
                G4int it=1;
                if(G4UniformRand()<.5) it++;
                *aEnd = it;
                *bEnd = -it;
        }
        else
        {
                G4int heavy =  absPDGcode/100;
                G4int light = (absPDGcode%100)/10;
                G4int anti  = 1 - 2*(std::max(heavy, light)%2);
                if (PDGcode < 0 ) anti = -anti;
                heavy *=  anti;
                light *= -anti;
                if ( anti < 0) G4SwapObj(&heavy, &light);
                *aEnd = heavy;
                *bEnd = light;
        }
        return result;
}