#include <FieldBuilder.h>

Public Member Functions
void	build (G4FieldManager fM=0, G4PropagatorInField fP=0)
void	configureForVolume (const std::string &volName, edm::ParameterSet &volPSet, G4FieldManager fM=0, G4PropagatorInField fP=0)
	FieldBuilder (const MagneticField *, const edm::ParameterSet &)
G4LogicalVolume *	fieldTopVolume ()
void	setStepperAndChordFinder (G4FieldManager *fM, int val)
Private Member Functions
void	configureFieldManager (G4FieldManager *fM)
void	configurePropagatorInField (G4PropagatorInField *fP)
Private Attributes
double	dChord
double	dIntersection
double	dIntersectionAndOneStep
double	dOneStep
G4ChordFinder *	fChordFinder
G4ChordFinder *	fChordFinderMonopole
std::string	fieldType
double	fieldValue
std::string	keywordField
double	maxEpsilonStep
double	maxLoopCount
double	minEpsilonStep
double	minStep
std::string	stepper
std::auto_ptr< Field >	theField
G4Mag_UsualEqRhs *	theFieldEquation
edm::ParameterSet	thePSet
G4LogicalVolume *	theTopVolume

Detailed Description

Definition at line 19 of file FieldBuilder.h.

Constructor & Destructor Documentation

FieldBuilder::FieldBuilder	(	const MagneticField *	f,
		const edm::ParameterSet &	p
	)

Definition at line 35 of file FieldBuilder.cc.

References theField, and theFieldEquation.

   : theField( new Field(f,p.getParameter<double>("delta"))), 
     theFieldEquation(new G4Mag_UsualEqRhs(theField.get())),
     theTopVolume(0), fChordFinder(0), fChordFinderMonopole(0),
     fieldValue(0.), minStep(0.), dChord(0.), dOneStep(0.),
     dIntersection(0.), dIntersectionAndOneStep(0.), 
     maxLoopCount(0), minEpsilonStep(0.), maxEpsilonStep(0.), 
     thePSet(p) {

  theField->fieldEquation(theFieldEquation);
}

Member Function Documentation

void sim::FieldBuilder::build	(	G4FieldManager *	fM = `0`,
		G4PropagatorInField *	fP = `0`
	)

Referenced by RunManager::initG4().

void FieldBuilder::configureFieldManager ( G4FieldManager * fM ) [private]

Definition at line 143 of file FieldBuilder.cc.

References dChord, dIntersection, dIntersectionAndOneStep, dOneStep, fChordFinderMonopole, minStep, sim::FieldStepper::select(), stepper, and theField.

Referenced by configureForVolume().

                                                            {

  if (fM!=0) {
    fM->SetDetectorField(theField.get());
    FieldStepper * theStepper = new FieldStepper(theField->fieldEquation());
    theStepper->select(stepper);
    G4ChordFinder * CF = new G4ChordFinder(theField.get(),minStep,theStepper);
    CF->SetDeltaChord(dChord);
    fM->SetChordFinder(CF);
    fM->SetDeltaOneStep(dOneStep);
    fM->SetDeltaIntersection(dIntersection);
    if (dIntersectionAndOneStep != -1.) 
      fM->SetAccuraciesWithDeltaOneStep(dIntersectionAndOneStep);
  }
  if (fChordFinderMonopole == 0) {
    G4MonopoleEquation* fMonopoleEquation = new G4MonopoleEquation(theField.get());
    G4MagIntegratorStepper* theStepper = new G4ClassicalRK4(fMonopoleEquation);
    fChordFinderMonopole = new G4ChordFinder(theField.get(),minStep,theStepper);
    fChordFinderMonopole->SetDeltaChord(dChord);
  }
}

void FieldBuilder::configureForVolume	(	const std::string &	volName,
		edm::ParameterSet &	volPSet,
		G4FieldManager *	fM = `0`,
		G4PropagatorInField *	fP = `0`
	)

Definition at line 95 of file FieldBuilder.cc.

References configureFieldManager(), configurePropagatorInField(), dChord, dIntersection, dIntersectionAndOneStep, dOneStep, fieldType, edm::ParameterSet::getParameter(), i, maxEpsilonStep, maxLoopCount, minEpsilonStep, minStep, stepper, and theTopVolume.

                                                                  {

  G4LogicalVolumeStore* theStore = G4LogicalVolumeStore::GetInstance();
  for (unsigned int i=0; i<(*theStore).size(); ++i ) {
    std::string curVolName = ((*theStore)[i])->GetName();
    if ( curVolName == volName ) {
      theTopVolume = (*theStore)[i] ;
    }
  }

  fieldType     = volPSet.getParameter<std::string>("Type") ;
  stepper       = volPSet.getParameter<std::string>("Stepper") ;
  edm::ParameterSet stpPSet = 
    volPSet.getParameter<edm::ParameterSet>(stepper) ;
  minStep       = stpPSet.getParameter<double>("MinStep") ;
  dChord        = stpPSet.getParameter<double>("DeltaChord") ;
  dOneStep      = stpPSet.getParameter<double>("DeltaOneStep") ;
  dIntersection = stpPSet.getParameter<double>("DeltaIntersection") ;
  dIntersectionAndOneStep = stpPSet.getUntrackedParameter<double>("DeltaIntersectionAndOneStep",-1.);
  maxLoopCount = stpPSet.getUntrackedParameter<double>("MaximumLoopCounts",1000);
  minEpsilonStep = stpPSet.getUntrackedParameter<double>("MinimumEpsilonStep",0.00001);
  maxEpsilonStep = stpPSet.getUntrackedParameter<double>("MaximumEpsilonStep",0.01);
   
  if (fM!=0) configureFieldManager(fM);
  if (fP!=0) configurePropagatorInField(fP);    

  return;

}

void FieldBuilder::configurePropagatorInField ( G4PropagatorInField * fP ) [private]

Definition at line 165 of file FieldBuilder.cc.

References maxEpsilonStep, maxLoopCount, and minEpsilonStep.

Referenced by configureForVolume().

                                                                      {
  if (fP==0) return;
  fP->SetMaxLoopCount(int(maxLoopCount));
  fP->SetMinimumEpsilonStep(minEpsilonStep);
  fP->SetMaximumEpsilonStep(maxEpsilonStep);
  fP->SetVerboseLevel(0);
  return;
}

G4LogicalVolume * FieldBuilder::fieldTopVolume ( )

Definition at line 128 of file FieldBuilder.cc.

References theTopVolume.

{ return theTopVolume; }

void FieldBuilder::setStepperAndChordFinder	(	G4FieldManager *	fM,
		int	val
	)

Definition at line 130 of file FieldBuilder.cc.

References fChordFinder, and fChordFinderMonopole.

                                                                        {

  if (fM != 0) {
    if (val == 0) {
      if (fChordFinder != 0) fM->SetChordFinder(fChordFinder);
    } else {
      fChordFinder = fM->GetChordFinder();
      if (fChordFinderMonopole != 0) fM->SetChordFinder(fChordFinderMonopole);
    }
  }
}