source: trunk/source/geometry/solids/test/fred/src/SprayParticleGun.cc @ 1316

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//
//
// SprayParticleGun
//
// Implementation of test particle gun
//

#include "SprayParticleGun.hh"
#include "SprayParticleGunMessenger.hh"

#include "G4PrimaryParticle.hh"
#include "G4ParticleTypes.hh"
#include "G4Event.hh"

//
// Constructor (no arguments)
//
SprayParticleGun::SprayParticleGun()
{
        SetDefaults();
}

//
// Constructor (position specified)
//
SprayParticleGun::SprayParticleGun( G4ThreeVector inStart )
{
        SetDefaults();
        start = inStart;
}

//
// Destructor
//
SprayParticleGun::~SprayParticleGun() {
        delete messenger;
}

//
// SetDefaults
//
// Set default parameters
//
void SprayParticleGun::SetDefaults()
{
        start = G4ThreeVector(0,0,0);
        spray[0] = 7;
        spray[1] = 7;
        spray[2] = 2;
        
        particleType = G4Geantino::GeantinoDefinition();
        
        messenger = new SprayParticleGunMessenger(this);
}

//
// GeneratePrimaryVertex
//
// Make the event
//
void SprayParticleGun::GeneratePrimaryVertex( G4Event *evt )
{
        //
        // Create a new vertex
        //
        G4PrimaryVertex *vertex = new G4PrimaryVertex( start, 0.0 );
        
        //
        // Loop over the three dimensions, creating particles
        // as specified
        //
        G4double px = -1.0;
        G4int    ix = 1;
        do {
                if (!(spray[0]&ix)) continue;
                
                G4double py = -1.0;
                G4int    iy = 1;
                do {
                        if (!(spray[1]&iy)) continue;
                
                        G4double pz = -1.0;
                        G4int    iz = 1; 
                        do {
                                if (!(spray[2]&iz)) continue;
                        
                                if (ix==2 && iy==2 && iz==2) continue;
                                
                                G4PrimaryParticle *particle = new G4PrimaryParticle( particleType, px, py, pz );
                                vertex->SetPrimary( particle );
                        } while( pz += 1.0, iz <<= 1, iz < 8 );
                } while( py += 1.0, iy <<= 1, iy < 8 );
        } while( px += 1.0, ix <<= 1, ix < 8 );

        //
        // Give this sucker to the event
        //
        evt->AddPrimaryVertex( vertex );
}