G4ErrorTrackLengthTarget.hh

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//
//
//
//
// Class Description:
//
// G4ErrorTarget class: limits step when track length is bigger than
// theMaximumTrackLength. It is a G4VDiscreteProcess: limits the step in
// PostStepGetPhysicalInteractionLength().
 
// History:
// - Created. P. Arce, September 2004
// --------------------------------------------------------------------
 
#ifndef G4ErrorTrackLengthTarget_hh
#define G4ErrorTrackLengthTarget_hh
 
#include "G4ios.hh"
#include "globals.hh"
#include "G4VDiscreteProcess.hh"
#include "G4PhysicsTable.hh"
#include "G4PhysicsLogVector.hh"
#include "G4ElementTable.hh"
#include "G4Step.hh"
#include "G4ErrorTarget.hh"
 
//----------------------------------------------------------------------------
 
class G4ErrorTrackLengthTarget
  : public G4VDiscreteProcess
  , public G4ErrorTarget
{
 public:  // with description
  G4ErrorTrackLengthTarget(const G4double maxTrkLength);
  // Constructs and add this process to G4ProcessManager of all particles
  virtual ~G4ErrorTrackLengthTarget() {}
 
  // These methods are dummy, as the step limitation is done in the
  // PostStepGetPhysicalInteractionLength().
 
  virtual G4double GetDistanceFromPoint(const G4ThreeVector&,
                                        const G4ThreeVector&) const
  {
    return DBL_MAX;
  }
  virtual G4double GetDistanceFromPoint(const G4ThreeVector&) const
  {
    return DBL_MAX;
  }
 
  virtual G4double PostStepGetPhysicalInteractionLength(
    const G4Track& track, G4double previousStepSize,
    G4ForceCondition* condition);
  // Checks if the maximum track length has been reached
 
  virtual G4double GetMeanFreePath(const class G4Track& track, G4double,
                                   G4ForceCondition*);
  // Mean free path = theMaximumTrackLength - track.GetTrackLength()
 
  virtual G4VParticleChange* PostStepDoIt(const G4Track&, const G4Step&);
 
  virtual void Dump(const G4String& msg) const;
 
 private:
  G4double theMaximumTrackLength;
  G4VParticleChange theParticleChange;
};
 
#endif