Bug fix in like-sign refs
[u/mrichter/AliRoot.git] / TPC / AliTPCExBBShape.h
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0116859c 1#ifndef ALI_TPC_EXB_B_SHAPE_H
2#define ALI_TPC_EXB_B_SHAPE_H
3
4/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
6
7////////////////////////////////////////////////////////////////////////////
8// //
9// AliExBBShape class //
10// The class calculates the space point distortions due to the B field //
11// shape imperfections using a second order technique based on integrals //
12// over Bz (e.g. int By/Bz) obtained via the AliMagF class //
13// The class allows "effective Omega Tau" corrections. //
14// //
15// date: 27/04/2010 //
16// Authors: Magnus Mager, Jim Thomas, Stefan Rossegger //
17////////////////////////////////////////////////////////////////////////////
18
19#include "AliTPCCorrection.h"
20
21class AliMagF;
22
23class AliTPCExBBShape : public AliTPCCorrection {
24public:
25 AliTPCExBBShape();
26 virtual ~AliTPCExBBShape();
27
e527a1b9 28 // initialization and update functions
29 virtual void Init();
30 virtual void Update(const TTimeStamp &timeStamp);
31
0116859c 32 // common setters and getters for ExB
33 virtual void SetOmegaTauT1T2(Float_t omegaTau,Float_t t1,Float_t t2) {
34 const Float_t wt1=t1*omegaTau;
35 fC1=wt1/(1.+wt1*wt1);
36 const Float_t wt2=t2*omegaTau;
37 fC2=wt2*wt2/(1.+wt2*wt2);
38 };
39 void SetC1C2(Float_t c1,Float_t c2) {fC1=c1;fC2=c2;} // CAUTION: USE WITH CARE
40 Float_t GetC1() const {return fC1;}
41 Float_t GetC2() const {return fC2;}
42
43 // setters and getters for the magentic field map
44 void SetBField(AliMagF *bField) {fBField=bField;}
45 AliMagF* GetBField() const {return fBField;}
46
47 virtual void GetCorrection(const Float_t x[],const Short_t roc,Float_t dx[]);
48 void GetBxAndByOverBz(const Float_t x[],const Short_t roc,Float_t BxByOverBz[]);
49
50 virtual void Print(Option_t* option="") const;
51
52private:
53 Float_t fC1; // coefficient C1 (compare Jim Thomas's notes for definitions)
54 Float_t fC2; // coefficient C2 (compare Jim Thomas's notes for definitions)
55
56 AliMagF *fBField;
57
58 AliTPCExBBShape & operator =(const AliTPCExBBShape);
59 AliTPCExBBShape(const AliTPCExBBShape&); //dummy copy contructor
60
61 ClassDef(AliTPCExBBShape,1);
62};
63
64#endif