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geant4/source/geometry/magneticfield/include/G4BorisDriver.icc
2025-12-05 08:54:02 +01:00

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//
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//
// G4BorisDriver inline methods implementation
//
// Author: Divyansh Tiwari (CERN, Google Summer of Code 2022), 05.11.2022
// Supervision: John Apostolakis (CERN), Renee Fatemi, Soon Yung Jun (FNAL)
// --------------------------------------------------------------------
inline
G4double G4BorisDriver::AdvanceChordLimited(G4FieldTrack& track,
G4double hstep,
G4double eps,
G4double chordDistance)
{
return ChordFinderDelegate::
AdvanceChordLimitedImpl(track, hstep, eps, chordDistance);
}
inline
void G4BorisDriver::OnStartTracking()
{
ChordFinderDelegate::ResetStepEstimate();
}
inline
void G4BorisDriver::OnComputeStep(const G4FieldTrack*)
{
}
inline
G4bool G4BorisDriver::DoesReIntegrate() const
{
return true;
}
inline
G4double G4BorisDriver::ComputeNewStepSize( G4double /* errMaxNorm*/,
G4double hstepCurrent)
{
return hstepCurrent;
}
inline
void G4BorisDriver::SetVerboseLevel(G4int level)
{
fVerbosity = (level != 0);
}
inline
G4int G4BorisDriver::GetVerboseLevel() const
{
return static_cast<G4int>(fVerbosity);
}
inline
const G4EquationOfMotion* G4BorisDriver::GetEquationOfMotion() const
{
auto eq = boris->GetEquationOfMotion();
return eq;
}
inline
G4EquationOfMotion* G4BorisDriver::GetEquationOfMotion()
{
auto eq = boris->GetEquationOfMotion();
return eq;
}
inline
G4int G4BorisDriver::GetNumberOfVariables() const
{
return boris->GetNumberOfVariables();
}
inline
const G4MagIntegratorStepper* G4BorisDriver::GetStepper() const
{
return nullptr;
}
inline
G4MagIntegratorStepper* G4BorisDriver::GetStepper()
{
return nullptr;
}
inline
void G4BorisDriver::CheckStep(const G4ThreeVector& posIn,
const G4ThreeVector& posOut,
G4double hdid) const
{
const G4double endPointDist = (posOut - posIn).mag();
if (endPointDist >= hdid * (1. + CLHEP::perMillion))
{
// ++fNoAccurateAdvanceBadSteps;
// #ifdef G4DEBUG_FIELD
// Issue a warning only for gross differences -
// we understand how small difference occur.
if (endPointDist >= hdid * (1. + CLHEP::perThousand))
{
G4Exception("G4BorisDriver::CheckStep()", "GeomField1002", JustWarning,
"endPointDist >= hdid!");
}
else
{
G4cerr << "G4BorisDriver::CheckStep: moved further than curve distance! "
<< " curve hdid= " << hdid << " endpoint dist= " << endPointDist
<< " ratio - 1 = " << (endPointDist - hdid) / hdid
<< " ( > 1.0e-6 threshold to report ) "
<< G4endl;
}
// #endif
}
else
{
// ++fNoAccurateAdvanceGoodSteps;
}
}