X-Git-Url: http://git.uio.no/git/?a=blobdiff_plain;f=TPC%2FAliTPCExBFirst.h;h=b51a03c07b5d9762a8c59112f9ad91760e9b4725;hb=55f67952dba2f77caacd756b697055d22c7b562e;hp=c003ea0f67531428dd2f00051ee82d7c085eaa32;hpb=faf9323738d83434592a89e8b4439f5b9130db9c;p=u%2Fmrichter%2FAliRoot.git

diff --git a/TPC/AliTPCExBFirst.h b/TPC/AliTPCExBFirst.h
index c003ea0f675..b51a03c07b5 100644
--- a/TPC/AliTPCExBFirst.h
+++ b/TPC/AliTPCExBFirst.h
@@ -1,38 +1,52 @@
-#ifndef ALITPC_EXB_FIRST_H
-#define ALITPC_EXB_FIRST_H
+/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ * See cxx source for full Copyright notice                               */
+
+////
+// An approximate (first order) implementation of the ExB effect.
+////
+
+#ifndef ALITPCEXBFIRST_H
+#define ALITPCEXBFIRST_H
 
 #include "AliTPCExB.h"
-#include "AliFieldMap.h"
-#include "AliMagF.h"
+class AliFieldMap;
+class AliMagF;
 
 class AliTPCExBFirst:public AliTPCExB {
 public:
+  AliTPCExBFirst();
   AliTPCExBFirst(const AliFieldMap *bFieldMap,Double_t driftVelocity);
   AliTPCExBFirst(const AliMagF *bField,Double_t driftVelocity,
 		 Int_t nx=100,Int_t ny=100,Int_t nz=100);
   virtual ~AliTPCExBFirst();
   virtual void Correct(const Double_t *position,Double_t *corrected);
   void TestThisBeautifulObject(const char* fileName);
+  void SetDriftVelocity(Double_t driftVelocity) {
+    fDriftVelocity=driftVelocity;
+  };
+protected:
+  Double_t fDriftVelocity; // The electron drift velocity.
 private:
   AliTPCExBFirst& operator=(const AliTPCExBFirst&); // don't assign me
   AliTPCExBFirst(const AliTPCExBFirst&); // don't copy me
   void ConstructCommon(const AliFieldMap *bFieldMap,const AliMagF *bField);
   void GetMeanFields(Double_t rx,Double_t ry,Double_t rz,
 		     Double_t *Bx,Double_t *By) const;
-  Int_t fkNX;        // field mesh points in x direction
-  Int_t fkNY;        // field mesh points in y direction
-  Int_t fkNZ;        // field mesh points in z direction
-  Double_t fkXMin;   // the first grid point in x direction
-  Double_t fkXMax;   // the last grid point in x direction
-  Double_t fkYMin;   // the first grid point in y direction
-  Double_t fkYMax;   // the last grid point in y direction
-  Double_t fkZMin;   // the first grid point in z direction
-  Double_t fkZMax;   // the last grid point in z direction
-  Double_t *fMeanBx; // the mean field in x direction upto a certain z value
-  Double_t *fMeanBy; // the mean field in y direction upto a certain z value
-  Double_t fMeanBz;  // the mean field in z direction inside the TPC volume
-  static const Double_t fgkEM; // elementary charge over electron mass (C/kg)
-  static const Double_t fgkDriftField; // the TPC drift field (V/m) (modulus)
+  Int_t fkNX;         // field mesh points in x direction
+  Int_t fkNY;         // field mesh points in y direction
+  Int_t fkNZ;         // field mesh points in z direction
+  Double_t fkXMin;    // the first grid point in x direction
+  Double_t fkXMax;    // the last grid point in x direction
+  Double_t fkYMin;    // the first grid point in y direction
+  Double_t fkYMax;    // the last grid point in y direction
+  Double_t fkZMin;    // the first grid point in z direction
+  Double_t fkZMax;    // the last grid point in z direction
+  Int_t fkNMean;      // size of the tablE the mean fields
+  Double_t *fkMeanBx; //[fkNMean] the mean field in x direction upto a certain z value
+  Double_t *fkMeanBy; //[fkNMean] the mean field in y direction upto a certain z value
+  Double_t fkMeanBz;  // the mean field in z direction inside the TPC volume
+  static const Double_t fgkEM; //! elementary charge over electron mass (C/kg)
+  static const Double_t fgkDriftField; //! the TPC drift field (V/m) (modulus)
 
   ClassDef(AliTPCExBFirst,1)
 };