Import Geant4 0.0.0 source tree

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+// This code implementation is the intellectual property of
+// the RD44 GEANT4 collaboration.
+//
+// By copying, distributing or modifying the Program (or any work
+// based on the Program) you indicate your acceptance of this statement,
+// and all its terms.
+//
+// $Id: G4PropagatorInField.hh,v 2.8 1998/11/27 22:49:12 japost Exp $
+// GEANT4 tag $Name: geant4-00 $
+//
+// 
+// ------------------------------------------------------------------------
+//	GEANT 4  include file implementation
+//
+//	For information related to this code contact:
+//	CERN, IT Division (formely CN), ASD group
+// ------------------------------------------------------------------------
+// 
+//  This class performs the navigation/propagation of a particle/track 
+//  in a magnetic field. The field is in general non-uniform.
+//    For the calculation of the path, it relies on the class G4MagTr.
+//
+//  class G4PropagatorInField 
+//      Methods:
+//        ComputeStep(..)
+//        CalculateStepTimeAndAccuracy(..) 
+//        LocateIntersectionPoint(..)
+//
+// 25.10.96 John Apostolakis,  design and implementation 
+// 25.03.97 John Apostolakis,  adaptation for G4Transportation and cleanup
+// ------------------------------------------------------------------------
+#ifndef G4PropagatorInField_hh 
+#define G4PropagatorInField_hh  1
+
+#include "globals.hh"
+#include "G4FieldTrack.hh"
+// #include "G4VPhysicalVolume.hh"
+// class  G4VPhysicalVolume;
+
+#include "G4Navigator.hh"
+#include "G4ChordFinder.hh"
+
+#include "G4FieldManager.hh"
+
+// #include "G4MagIntegratorDriver.hh"
+
+class G4PropagatorInField {
+
+ public:
+   //  To create an object, must have an object that calculates the Curved 
+   //  paths and also must know the value of the maximum displacement allowed
+   //
+
+   G4PropagatorInField( G4Navigator    *theNavigator, 
+			G4FieldManager *detectorFieldMgr);
+
+   G4PropagatorInField( G4Navigator   *theNavigator );
+  ~G4PropagatorInField(){};
+
+   // Compute the next geometric Step
+   //
+   G4double ComputeStep(G4FieldTrack  &pFieldTrack,
+			G4double pCurrentProposedStepLength,
+			G4double       &pNewSafety, 
+			G4VPhysicalVolume *pPhysVol=0 );
+
+   G4double ComputeStep(const G4ThreeVector &pGlobalPoint,
+		        const G4ThreeVector &pCurveTangent,    // Unit vector
+		              G4double pCurrentProposedStepLength,
+			      G4double       &pNewSafety, 
+                       	      G4VPhysicalVolume *pPhysVol=0 );
+                                        // Current Volume (to check)
+
+   // Return the state after the Step
+   // 
+   G4ThreeVector  EndPosition();       
+   G4ThreeVector  EndMomentumDir();
+   G4bool         IsParticleLooping();
+
+   //   The accuracy of finding an intersection
+   //
+   G4double  DeltaIntersection(); 
+
+   //   The accuracy of a single Step
+   //
+   G4double  DeltaOneStep();
+
+   //   The ratio   DeltaOneStep()/h_current_step
+   //
+   G4double  GetEpsilonStep();  // Relative accuracy for current Step (Calc.)
+   void      SetEpsilonStep(G4double newEps);
+
+   //   A maximum for the number of steps that a (looping) particle 
+   //    can take.
+   // 
+   G4int          GetMaxLoopCount();
+   void           SetMaxLoopCount(G4int new_max);
+
+   void SetChargeMomentumMass( G4double Charge,         // in e+ units
+			       G4double Momentum,       // in Geant4 units
+			       G4double pMass);  
+
+   G4ChordFinder* GetChordFinder();
+   // void           SetChordFinder(G4ChordFinder* newCF);  // Not yet relevant
+
+   G4int  SetVerboseLevel( G4int Verbose ){ return fVerboseLevel=Verbose; }
+   G4int  Verbose(){ return fVerboseLevel; }
+
+   //   Print Method - useful mostly for debugging this class
+   //
+   void printStatus( 
+                  const G4FieldTrack&  StartFT,
+		  const G4FieldTrack&  CurrentFT, 
+                  G4double             requestStep, 
+                  G4double             safety,
+                  G4int                Step, 
+                  G4VPhysicalVolume*   startVolume);
+
+   //  The Field Manager of the Detector
+   // 
+   // void  SetGlobalFieldMgr( G4FieldManager *detectorFieldMgr );
+
+ private:
+
+   // The  Field Manager of the whole Detector
+   // 
+   G4FieldManager *fDetectorFieldMgr; 
+
+   G4Navigator   *fNavigator;
+
+   // End point storage:
+   //
+   G4FieldTrack    End_PointAndTangent;
+
+   // If such an intersection exists, this function 
+   // calculate the intersection point of the true path of the particle 
+   // with the surface of the current volume (or of one of its daughters). 
+   //  (Should use lateral displacement as measure of convergence). 
+   //
+   G4bool LocateIntersectionPoint( 
+	    const  G4FieldTrack&       CurveStartPointTangent,  //  A
+	    const  G4FieldTrack&       CurveEndPointTangent,    //  B
+	    const  G4ThreeVector&     TrialPoint,              //  E
+		   G4FieldTrack&       IntersectPointTangent);  // Output
+   //
+   //  [ Should this have fewer or additional arguments ? 
+   //         pointer to info on solution already obtained
+   //         tolerance
+   //  ]
+ 
+   G4double    fEpsilonStep;  // Relative accuracy for current Step (Calc.)
+
+   G4bool      fParticleIsLooping;
+   //  For debuging purposes
+   G4int  fVerboseLevel;
+
+   //  For the moment class constants ...  set in G4PropagatemagField.cc
+   //
+   static const G4double  delta_intersection_val; // = 0.1 * mm;
+   static const G4double  delta_one_step_val;    //  = 0.25 * mm;
+
+   G4int  fmax_loop_count;
+}; // End of class G4PropagatorInField {
+
+//  Defines the constructor.
+//
+#include "G4PropagatorInField.icc"
+
+#endif 
+// End of   "#ifndef G4PropagatorInField_hh"