lars/geant4
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Import Geant4 10.6.0 source tree

Browse Source
This commit is contained in:
Gabriele Cosmo
2019-12-06 15:12:28 +01:00
parent b2a62ae692
commit 5baee230e9
2997 changed files with 141580 additions and 98673 deletions
Download Patch File Download Diff File Expand all files Collapse all files
source/geometry/magneticfield/src/G4ExactHelixStepper.cc
+26 -27
View File
@@ -23,17 +23,10 @@
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
// G4ExactHelixStepper implementation
//
//
// Helix a-la-Explicity Euler: x_1 = x_0 + helix(h)
// with helix(h) being a helix piece of length h
// simplest approach for solving linear differential equations.
// Take the current derivative and add it to the current position.
//
// As the field is assumed constant, an error is not calculated.
//
// Author: J. Apostolakis, 28 Jan 2005
// Implementation adapted from ExplicitEuler of W.Wander
// Author: J.Apostolakis, 28.01.2005.
// Implementation adapted from ExplicitEuler by W.Wander
// -------------------------------------------------------------------
#include "G4ExactHelixStepper.hh"
@@ -41,46 +34,50 @@
#include "G4ThreeVector.hh"
#include "G4LineSection.hh"
G4ExactHelixStepper::G4ExactHelixStepper(G4Mag_EqRhs *EqRhs)
G4ExactHelixStepper::G4ExactHelixStepper(G4Mag_EqRhs* EqRhs)
: G4MagHelicalStepper(EqRhs),
fBfieldValue(DBL_MAX, DBL_MAX, DBL_MAX),
fPtrMagEqOfMot(EqRhs)
fBfieldValue(DBL_MAX, DBL_MAX, DBL_MAX)
{
;
}
G4ExactHelixStepper::~G4ExactHelixStepper() {}
G4ExactHelixStepper::~G4ExactHelixStepper()
{
}
// ---------------------------------------------------------------------------
void
G4ExactHelixStepper::Stepper( const G4double yInput[],
const G4double*,
G4double hstep,
G4double yOut[],
G4double yErr[] )
G4double yErr[] )
{
const G4int nvar = 6;
const G4int nvar = 6;
G4int i;
G4ThreeVector Bfld_value;
G4int i;
G4ThreeVector Bfld_value;
MagFieldEvaluate(yInput, Bfld_value);
AdvanceHelix(yInput, Bfld_value, hstep, yOut);
MagFieldEvaluate(yInput, Bfld_value);
AdvanceHelix(yInput, Bfld_value, hstep, yOut);
// We are assuming a constant field: helix is exact
//
for(i=0;i<nvar;i++)
for(i=0; i<nvar; ++i)
{
yErr[i] = 0.0 ;
}
fBfieldValue=Bfld_value;
fBfieldValue = Bfld_value;
}
// ---------------------------------------------------------------------------
void
G4ExactHelixStepper::DumbStepper( const G4double yIn[],
G4ThreeVector Bfld,
G4double h,
G4double yOut[])
G4ExactHelixStepper::DumbStepper( const G4double yIn[],
G4ThreeVector Bfld,
G4double h,
G4double yOut[])
{
// Assuming a constant field: solution is a helix
@@ -120,6 +117,8 @@ G4ExactHelixStepper::DistChord() const
return distChord;
}
// ---------------------------------------------------------------------------
G4int
G4ExactHelixStepper::IntegratorOrder() const
{