Import Geant4 9.0.0 source tree

2016-06-09 15:16:48 +02:00
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+//
+// ********************************************************************
+// * License and Disclaimer                                           *
+// *                                                                  *
+// * The  Geant4 software  is  copyright of the Copyright Holders  of *
+// * the Geant4 Collaboration.  It is provided  under  the terms  and *
+// * conditions of the Geant4 Software License,  included in the file *
+// * LICENSE and available at  http://cern.ch/geant4/license .  These *
+// * include a list of copyright holders.                             *
+// *                                                                  *
+// * Neither the authors of this software system, nor their employing *
+// * institutes,nor the agencies providing financial support for this *
+// * work  make  any representation or  warranty, express or implied, *
+// * regarding  this  software system or assume any liability for its *
+// * use.  Please see the license in the file  LICENSE  and URL above *
+// * for the full disclaimer and the limitation of liability.         *
+// *                                                                  *
+// * This  code  implementation is the result of  the  scientific and *
+// * technical work of the GEANT4 collaboration.                      *
+// * By using,  copying,  modifying or  distributing the software (or *
+// * any work based  on the software)  you  agree  to acknowledge its *
+// * use  in  resulting  scientific  publications,  and indicate your *
+// * acceptance of all terms of the Geant4 Software license.          *
+// ********************************************************************
+//
+//
+// $Id: G4ErrorFreeTrajState.hh,v 1.4 2007/05/31 20:27:06 arce Exp $
+// GEANT4 tag $Name: geant4-09-00 $
+//
+// Class Description:
+//
+// Represents a free G4ErrorTrajState
+// It can be represented by the 5 variables
+//     1/p, lambda, phi, y_perp, z_perp
+// where lambda and phi are the dip and azimuthal angles related
+// to the momentum components in the following way:
+//            p_x = p cos(lambda) cos(phi)  ! lambda = 90 - theta
+//            p_y = p cos(lambda) sin(phi)
+//            p_z = p sin(lambda)
+// y_perp and z_perp are the coordinates of the trajectory in a
+// local orthonormal reference frame with the x_perp axis along the
+// particle direction, the y_perp being parallel to the x-y plane.
+//
+// This class also takes care of propagating the error associated to 
+// the trajectory 
+
+// History:
+// - Created:   P. Arce
+// --------------------------------------------------------------------
+
+#ifndef G4ErrorFreeTrajState_hh
+#define G4ErrorFreeTrajState_hh
+
+#include "globals.hh"
+
+#include "G4ErrorMatrix.hh"
+
+#include "G4ErrorTrajState.hh"
+#include "G4ErrorFreeTrajParam.hh"
+
+#include "G4Point3D.hh"
+#include "G4Vector3D.hh"
+
+class G4ErrorSurfaceTrajState;
+
+class G4ErrorFreeTrajState : public G4ErrorTrajState
+{
+ public:  // with description
+
+  G4ErrorFreeTrajState(){}
+  G4ErrorFreeTrajState( const G4String& partType,
+                        const G4Point3D& pos,
+                        const G4Vector3D& mom,
+                        const G4ErrorTrajErr& errmat = G4ErrorTrajErr(5,0) );
+    // Constructor by providing particle, position and momentum
+
+  G4ErrorFreeTrajState( const G4ErrorSurfaceTrajState& tpOS );
+    // Constructor by providing G4ErrorSurfaceTrajState
+
+  ~G4ErrorFreeTrajState(){}
+
+  virtual G4int Update( const G4Track* aTrack );
+    // update parameters from G4Track
+
+  virtual G4int PropagateError( const G4Track* aTrack );
+    // propagate the error along the step
+
+  virtual void Dump( std::ostream& out = G4cout ) const;
+    // dump TrajState parameters
+
+  friend
+    std::ostream& operator<<(std::ostream&, const G4ErrorFreeTrajState& ts);
+
+  // Set and Get methods 
+
+  virtual void SetPosition( const G4Point3D pos )
+    { SetParameters( pos, fMomentum ); }
+
+  virtual void SetMomentum( const G4Vector3D& mom )
+    { SetParameters( fPosition, mom ); }
+
+  void SetParameters( const G4Point3D& pos, const G4Vector3D& mom )
+    {
+      fPosition = pos;
+      fMomentum = mom;
+      fTrajParam.SetParameters( pos, mom );
+    }
+
+  G4ErrorFreeTrajParam GetParameters() const
+    { return fTrajParam; }
+
+ private:  
+
+  void Init();
+    // define TrajState type and build charge
+
+  G4int PropagateErrorMSC( const G4Track* aTrack );
+    // add the error associated to multiple scattering
+
+  void CalculateEffectiveZandA( const G4Material* mate, double& effZ, double& effA );
+    // calculate effective Z and A (needed by PropagateErrorMSC)
+  
+  G4int PropagateErrorIoni( const G4Track* aTrack );
+    // add the error associated to ionization energy loss
+
+
+ private:
+
+  G4ErrorFreeTrajParam fTrajParam;
+
+  G4ErrorMatrix theTransfMat;
+
+  G4bool theFirstStep; // to count if transf mat is updated or initialized
+};
+
+#endif