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Moving the OCDB object and mag field from the selector's input list to the input...
[u/mrichter/AliRoot.git] / STEER / AliMagWrapCheb.h
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da7cd221 1
2// Author: ruben.shahoyan@cern.ch 20/03/2007
3
4///////////////////////////////////////////////////////////////////////////////////
5// //
6// Wrapper for the set of mag.field parameterizations by Chebyshev polinomials //
7// To obtain the field in cartesian coordinates/components use //
db83d72f 8// Field(double* xyz, double* bxyz); //
da7cd221 9// For cylindrical coordinates/components: //
db83d72f 10// FieldCyl(double* rphiz, double* brphiz) //
da7cd221 11// //
12// The solenoid part is parameterized in the volume R<500, -550<Z<550 cm //
13// //
14// The region R<423 cm, -343.3<Z<481.3 for 30kA and -343.3<Z<481.3 for 12kA //
15// is parameterized using measured data while outside the Tosca calculation //
16// is used (matched to data on the boundary of the measurements) //
17// //
18// Two options are possible: //
19// 1) _BRING_TO_BOUNDARY_ is defined in the AliCheb3D: //
20// If the querried point is outside of the validity region then the field //
21// at the closest point on the fitted surface is returned. //
22// 2) _BRING_TO_BOUNDARY_ is not defined in the AliCheb3D: //
23// If the querried point is outside of the validity region the return //
24// value for the field components are set to 0. //
25// //
26// To obtain the field integral in the TPC region from given point to nearest //
27// cathod plane (+- 250 cm) use: //
db83d72f 28// GetTPCInt(double* xyz, double* bxyz); for Cartesian frame //
da7cd221 29// or //
db83d72f 30// GetTPCIntCyl(Double_t *rphiz, Double_t *b); for Cylindrical frame //
da7cd221 31// //
32// //
33// The units are kiloGauss and cm. //
34// //
35///////////////////////////////////////////////////////////////////////////////////
36
a1dde210 37#ifndef ALIMAGWRAPCHEB_H
38#define ALIMAGWRAPCHEB_H
a1dde210 39
da7cd221 40#include <TMath.h>
41#include <TNamed.h>
42#include "AliCheb3D.h"
a1dde210 43
da7cd221 44class TSystem;
45class TArrayF;
46class TArrayI;
a1dde210 47
da7cd221 48class AliMagWrapCheb: public TNamed
a1dde210 49{
da7cd221 50 public:
a1dde210 51 AliMagWrapCheb();
da7cd221 52 AliMagWrapCheb(const AliMagWrapCheb& src);
53 ~AliMagWrapCheb() {Clear();}
54 //
55 void CopyFrom(const AliMagWrapCheb& src);
56 AliMagWrapCheb& operator=(const AliMagWrapCheb& rhs);
57 virtual void Clear(const Option_t * = "");
58 //
59 Int_t GetNParamsSol() const {return fNParamsSol;}
60 Int_t GetNSegZSol() const {return fNSegZSol;}
db83d72f 61 Float_t* GetSegZSol() const {return fSegZSol;}
da7cd221 62 //
63 Int_t GetNParamsTPCInt() const {return fNParamsTPCInt;}
64 Int_t GetNSegZTPCInt() const {return fNSegZTPCInt;}
65 //
66 Int_t GetNParamsDip() const {return fNParamsDip;}
67 Int_t GetNSegZDip() const {return fNZSegDip;}
68 //
69 //
70 Float_t GetMinZSol() const {return fMinZSol;}
71 Float_t GetMaxZSol() const {return fMaxZSol;}
72 Float_t GetMaxRSol() const {return fMaxRSol;}
73 //
74 Float_t GetMinZDip() const {return fMinZDip;}
75 Float_t GetMaxZDip() const {return fMaxZDip;}
76 //
77 Float_t GetMinZTPCInt() const {return fMinZTPCInt;}
78 Float_t GetMaxZTPCInt() const {return fMaxZTPCInt;}
79 Float_t GetMaxRTPCInt() const {return fMaxRTPCInt;}
80 //
81 AliCheb3D* GetParamSol(Int_t ipar) const {return (AliCheb3D*)fParamsSol->UncheckedAt(ipar);}
82 AliCheb3D* GetParamTPCInt(Int_t ipar) const {return (AliCheb3D*)fParamsTPCInt->UncheckedAt(ipar);}
83 AliCheb3D* GetParamDip(Int_t ipar) const {return (AliCheb3D*)fParamsDip->UncheckedAt(ipar);}
84 //
85 virtual void Print(Option_t * = "") const;
86 //
db83d72f 87 virtual void Field(const Double_t *xyz, Double_t *b) const;
88 Double_t GetBz(const Double_t *xyz) const;
da7cd221 89 //
db83d72f 90 void FieldCyl(const Double_t *rphiz, Double_t *b) const;
91 void GetTPCInt(const Double_t *xyz, Double_t *b) const;
92 void GetTPCIntCyl(const Double_t *rphiz, Double_t *b) const;
da7cd221 93 //
db83d72f 94 Int_t FindDipSegment(const Double_t *xyz) const;
95 static void CylToCartCylB(const Double_t *rphiz, const Double_t *brphiz,Double_t *bxyz);
96 static void CylToCartCartB(const Double_t *xyz, const Double_t *brphiz,Double_t *bxyz);
97 static void CartToCylCartB(const Double_t *xyz, const Double_t *bxyz, Double_t *brphiz);
98 static void CartToCylCylB(const Double_t *rphiz, const Double_t *bxyz, Double_t *brphiz);
99 static void CartToCyl(const Double_t *xyz, Double_t *rphiz);
100 static void CylToCart(const Double_t *rphiz,Double_t *xyz);
da7cd221 101 //
102#ifdef _INC_CREATION_ALICHEB3D_ // see AliCheb3D.h for explanation
103 void LoadData(const char* inpfile);
104 //
105 AliMagWrapCheb(const char* inputFile);
db83d72f 106 void SaveData(const char* outfile) const;
da7cd221 107 Int_t SegmentDipDimension(Float_t** seg,const TObjArray* par,int npar, int dim,
108 Float_t xmn,Float_t xmx,Float_t ymn,Float_t ymx,Float_t zmn,Float_t zmx);
109 //
110 void AddParamSol(const AliCheb3D* param);
111 void AddParamTPCInt(const AliCheb3D* param);
112 void AddParamDip(const AliCheb3D* param);
113 void BuildTableDip();
114 void BuildTableSol();
115 void BuildTableTPCInt();
116 void ResetTPCInt();
117 //
118 //
119#endif
a1dde210 120 //
121 protected:
db83d72f 122 void FieldCylSol(const Double_t *rphiz, Double_t *b) const;
123 Double_t FieldCylSolBz(const Double_t *rphiz) const;
da7cd221 124 //
125 protected:
126 //
127 Int_t fNParamsSol; // Total number of parameterization pieces for Sol
128 Int_t fNSegZSol; // Number of segments in Z for Solenoid field
129 //
130 Int_t fNParamsTPCInt; // Total number of parameterization pieces for TPC field integral
131 Int_t fNSegZTPCInt; // Number of segments in Z for TPC field integral
132 //
133 Int_t fNParamsDip; // Total number of parameterization pieces for dipole
134 Int_t fNZSegDip; // number of distinct Z segments in Dipole
135 Int_t fNYSegDip; // number of distinct Y segments in Dipole
136 Int_t fNXSegDip; // number of distinct X segments in Dipole
137 //
138 Float_t* fSegZSol; //[fNSegZSol] upper boundaries of Z segments
139 Float_t* fSegRSol; //[fNParamsSol] upper boundaries of R segments
140 //
141 Float_t* fSegZTPCInt; //[fNSegZTPCInt] upper boundaries of Z segments
142 Float_t* fSegRTPCInt; //[fNParamsTPCInt] upper boundaries of R segments
143 //
144 Float_t* fSegZDip; //[fNZSegDip] coordinates of distinct Z segments in Dipole
145 Float_t* fSegYDip; //[fNYSegDip] coordinated of Y segments for each Zsegment in Dipole
146 Float_t* fSegXDip; //[fNXSegDip] coordinated of X segments for each Ysegment in Dipole
147 //
148 Int_t* fNSegRSol; //[fNSegZSol] number of R segments for each Z segment
149 Int_t* fSegZIdSol; //[fNSegZSol] Id of the first R segment of each Z segment in the fSegRSol...
150 //
151 Int_t* fNSegRTPCInt; //[fNSegZTPCInt] number of R segments for each Z segment
152 Int_t* fSegZIdTPCInt; //[fNSegZTPCInt] Id of the first R segment of each Z segment in the fSegRTPCInt...
153 //
154 Int_t* fBegSegYDip; //[fNZSegDip] beginning of Y segments array for each Z segment
155 Int_t* fNSegYDip; //[fNZSegDip] number of Y segments for each Z segment
156 Int_t* fBegSegXDip; //[fNYSegDip] beginning of X segments array for each Y segment
157 Int_t* fNSegXDip; //[fNYSegDip] number of X segments for each Y segment
158 Int_t* fSegIDDip; //[fNXSegDip] ID of the dipole parameterization for given XYZ segment
159 //
160 Float_t fMinZSol; // Min Z of Sol parameterization (in CYL. coordinates)
161 Float_t fMaxZSol; // Max Z of Sol parameterization (in CYL. coordinates)
162 Float_t fMaxRSol; // Max R of Sol parameterization (in CYL. coordinates)
163 //
164 Float_t fMinZDip; // Min Z of Dipole parameterization
165 Float_t fMaxZDip; // Max Z of Dipole parameterization
166 //
167 Float_t fMinZTPCInt; // Min Z of TPCInt parameterization (in CYL. coordinates)
168 Float_t fMaxZTPCInt; // Max Z of TPCInt parameterization (in CYL. coordinates)
169 Float_t fMaxRTPCInt; // Max R of TPCInt parameterization (in CYL. coordinates)
170 //
171 TObjArray* fParamsSol; // Parameterization pieces for Solenoid field
172 TObjArray* fParamsDip; // Parameterization pieces for Dipole field
173 TObjArray* fParamsTPCInt; // Parameterization pieces for Solenoid field integrals in TPC region
174 //
db83d72f 175 ClassDef(AliMagWrapCheb,4) // Wrapper class for the set of Chebishev parameterizations of Alice mag.field
da7cd221 176 //
177 };
178
179
da7cd221 180//__________________________________________________________________________________________
181inline void AliMagWrapCheb::FieldCyl(const Double_t *rphiz, Double_t *b) const
182{
183 // compute field in Cylindircal coordinates
184 // if (rphiz[2]<GetMinZSol() || rphiz[2]>GetMaxZSol() || rphiz[0]>GetMaxRSol()) {for (int i=3;i--;) b[i]=0; return;}
185 FieldCylSol(rphiz,b);
186}
187
188//__________________________________________________________________________________________________
db83d72f 189inline void AliMagWrapCheb::CylToCartCylB(const Double_t *rphiz, const Double_t *brphiz,Double_t *bxyz)
da7cd221 190{
191 // convert field in cylindrical coordinates to cartesian system, point is in cyl.system
db83d72f 192 Double_t btr = TMath::Sqrt(brphiz[0]*brphiz[0]+brphiz[1]*brphiz[1]);
193 Double_t psiPLUSphi = TMath::ATan2(brphiz[1],brphiz[0]) + rphiz[1];
da7cd221 194 bxyz[0] = btr*TMath::Cos(psiPLUSphi);
195 bxyz[1] = btr*TMath::Sin(psiPLUSphi);
196 bxyz[2] = brphiz[2];
197 //
198}
199
200//__________________________________________________________________________________________________
db83d72f 201inline void AliMagWrapCheb::CylToCartCartB(const Double_t* xyz, const Double_t *brphiz, Double_t *bxyz)
da7cd221 202{
203 // convert field in cylindrical coordinates to cartesian system, point is in cart.system
db83d72f 204 Double_t btr = TMath::Sqrt(brphiz[0]*brphiz[0]+brphiz[1]*brphiz[1]);
205 Double_t phiPLUSpsi = TMath::ATan2(xyz[1],xyz[0]) + TMath::ATan2(brphiz[1],brphiz[0]);
da7cd221 206 bxyz[0] = btr*TMath::Cos(phiPLUSpsi);
207 bxyz[1] = btr*TMath::Sin(phiPLUSpsi);
208 bxyz[2] = brphiz[2];
209 //
210}
211
212//__________________________________________________________________________________________________
db83d72f 213inline void AliMagWrapCheb::CartToCylCartB(const Double_t *xyz, const Double_t *bxyz, Double_t *brphiz)
da7cd221 214{
215 // convert field in cylindrical coordinates to cartesian system, poin is in cart.system
db83d72f 216 Double_t btr = TMath::Sqrt(bxyz[0]*bxyz[0]+bxyz[1]*bxyz[1]);
217 Double_t psiMINphi = TMath::ATan2(bxyz[1],bxyz[0]) - TMath::ATan2(xyz[1],xyz[0]);
da7cd221 218 //
219 brphiz[0] = btr*TMath::Cos(psiMINphi);
220 brphiz[1] = btr*TMath::Sin(psiMINphi);
221 brphiz[2] = bxyz[2];
222 //
223}
224
225//__________________________________________________________________________________________________
db83d72f 226inline void AliMagWrapCheb::CartToCylCylB(const Double_t *rphiz, const Double_t *bxyz, Double_t *brphiz)
da7cd221 227{
228 // convert field in cylindrical coordinates to cartesian system, point is in cyl.system
db83d72f 229 Double_t btr = TMath::Sqrt(bxyz[0]*bxyz[0]+bxyz[1]*bxyz[1]);
230 Double_t psiMINphi = TMath::ATan2(bxyz[1],bxyz[0]) - rphiz[1];
da7cd221 231 brphiz[0] = btr*TMath::Cos(psiMINphi);
232 brphiz[1] = btr*TMath::Sin(psiMINphi);
233 brphiz[2] = bxyz[2];
234 //
235}
a1dde210 236
da7cd221 237//__________________________________________________________________________________________________
db83d72f 238inline void AliMagWrapCheb::CartToCyl(const Double_t *xyz, Double_t *rphiz)
da7cd221 239{
240 rphiz[0] = TMath::Sqrt(xyz[0]*xyz[0]+xyz[1]*xyz[1]);
241 rphiz[1] = TMath::ATan2(xyz[1],xyz[0]);
242 rphiz[2] = xyz[2];
243}
244
245//__________________________________________________________________________________________________
db83d72f 246inline void AliMagWrapCheb::CylToCart(const Double_t *rphiz, Double_t *xyz)
da7cd221 247{
248 xyz[0] = rphiz[0]*TMath::Cos(rphiz[1]);
249 xyz[1] = rphiz[0]*TMath::Sin(rphiz[1]);
250 xyz[2] = rphiz[2];
251}
252
a1dde210 253#endif