+
+// Author: ruben.shahoyan@cern.ch 20/03/2007
+
+///////////////////////////////////////////////////////////////////////////////////
+// //
+// Wrapper for the set of mag.field parameterizations by Chebyshev polinomials //
+// To obtain the field in cartesian coordinates/components use //
+// Field(double* xyz, double* bxyz); //
+// For cylindrical coordinates/components: //
+// FieldCyl(double* rphiz, double* brphiz) //
+// //
+// The solenoid part is parameterized in the volume R<500, -550<Z<550 cm //
+// //
+// The region R<423 cm, -343.3<Z<481.3 for 30kA and -343.3<Z<481.3 for 12kA //
+// is parameterized using measured data while outside the Tosca calculation //
+// is used (matched to data on the boundary of the measurements) //
+// //
+// Two options are possible: //
+// 1) _BRING_TO_BOUNDARY_ is defined in the AliCheb3D: //
+// If the querried point is outside of the validity region then the field //
+// at the closest point on the fitted surface is returned. //
+// 2) _BRING_TO_BOUNDARY_ is not defined in the AliCheb3D: //
+// If the querried point is outside of the validity region the return //
+// value for the field components are set to 0. //
+// //
+// To obtain the field integral in the TPC region from given point to nearest //
+// cathod plane (+- 250 cm) use: //
+// GetTPCInt(double* xyz, double* bxyz); for Cartesian frame //
+// or //
+// GetTPCIntCyl(Double_t *rphiz, Double_t *b); for Cylindrical frame //
+// //
+// //
+// The units are kiloGauss and cm. //
+// //
+///////////////////////////////////////////////////////////////////////////////////
+
#ifndef ALIMAGWRAPCHEB_H
#define ALIMAGWRAPCHEB_H
-/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
- * See cxx source for full Copyright notice */
-
-//
-// Wrapper for AliMagFCheb: set of magnetic field data + Tosca parameterization by Chebyshev polynomials
-//
-// Author: ruben.shahoyan@cern.ch
-//
-#include "AliMagF.h"
-#include "AliMagFCheb.h"
+#include <TMath.h>
+#include <TNamed.h>
+#include "AliCheb3D.h"
+class TSystem;
+class TArrayF;
+class TArrayI;
-class AliMagWrapCheb : public AliMagF
+class AliMagWrapCheb: public TNamed
{
-public:
- enum constants {k2kG, k4kG, k5kG};
+ public:
AliMagWrapCheb();
- AliMagWrapCheb(const char *name, const char *title, Int_t integ,
- Float_t factor=1, Float_t fmax=15, Int_t map = k2kG,
- Bool_t dipoleON = kTRUE,
- const char* path="$(ALICE_ROOT)/data/maps/mfchebKGI_meas.root");
- AliMagWrapCheb(const AliMagWrapCheb& maps);
- AliMagWrapCheb& operator=(const AliMagWrapCheb& maps);
- virtual ~AliMagWrapCheb();
- //
- virtual void Field(Float_t *x, Float_t *b) const;
- virtual void GetTPCInt(Float_t *xyz, Float_t *b) const;
- virtual void GetTPCIntCyl(Float_t *rphiz, Float_t *b) const;
- //
- AliMagFCheb* GetMeasuredMap() const {return fMeasuredMap;}
- void SetMeasuredMap(AliMagFCheb* parm) {if (parm) delete parm; fMeasuredMap = parm;}
- virtual Float_t SolenoidField() const {return -Factor()*fSolenoid;}
+ AliMagWrapCheb(const AliMagWrapCheb& src);
+ ~AliMagWrapCheb() {Clear();}
+ //
+ void CopyFrom(const AliMagWrapCheb& src);
+ AliMagWrapCheb& operator=(const AliMagWrapCheb& rhs);
+ virtual void Clear(const Option_t * = "");
+ //
+ Int_t GetNParamsSol() const {return fNParamsSol;}
+ Int_t GetNSegZSol() const {return fNZSegSol;}
+ Float_t* GetSegZSol() const {return fSegZSol;}
+ //
+ Int_t GetNParamsTPCInt() const {return fNParamsTPC;}
+ Int_t GetNSegZTPCInt() const {return fNZSegTPC;}
+ //
+ Int_t GetNParamsDip() const {return fNParamsDip;}
+ Int_t GetNSegZDip() const {return fNZSegDip;}
+ //
+ Float_t GetMaxZ() const {return GetMaxZSol();}
+ Float_t GetMinZ() const {return fParamsDip ? GetMinZDip() : GetMinZSol();}
+ //
+ Float_t GetMinZSol() const {return fMinZSol;}
+ Float_t GetMaxZSol() const {return fMaxZSol;}
+ Float_t GetMaxRSol() const {return fMaxRSol;}
+ //
+ Float_t GetMinZDip() const {return fMinZDip;}
+ Float_t GetMaxZDip() const {return fMaxZDip;}
+ //
+ Float_t GetMinZTPCInt() const {return fMinZTPC;}
+ Float_t GetMaxZTPCInt() const {return fMaxZTPC;}
+ Float_t GetMaxRTPCInt() const {return fMaxRTPC;}
+ //
+ AliCheb3D* GetParamSol(Int_t ipar) const {return (AliCheb3D*)fParamsSol->UncheckedAt(ipar);}
+ AliCheb3D* GetParamTPCInt(Int_t ipar) const {return (AliCheb3D*)fParamsTPC->UncheckedAt(ipar);}
+ AliCheb3D* GetParamDip(Int_t ipar) const {return (AliCheb3D*)fParamsDip->UncheckedAt(ipar);}
+ //
+ virtual void Print(Option_t * = "") const;
+ //
+ virtual void Field(const Double_t *xyz, Double_t *b) const;
+ Double_t GetBz(const Double_t *xyz) const;
+ //
+ void FieldCyl(const Double_t *rphiz, Double_t *b) const;
+ void GetTPCInt(const Double_t *xyz, Double_t *b) const;
+ void GetTPCIntCyl(const Double_t *rphiz, Double_t *b) const;
+ //
+ Int_t FindSolSegment(const Double_t *xyz) const;
+ Int_t FindTPCSegment(const Double_t *xyz) const;
+ Int_t FindDipSegment(const Double_t *xyz) const;
+ static void CylToCartCylB(const Double_t *rphiz, const Double_t *brphiz,Double_t *bxyz);
+ static void CylToCartCartB(const Double_t *xyz, const Double_t *brphiz,Double_t *bxyz);
+ static void CartToCylCartB(const Double_t *xyz, const Double_t *bxyz, Double_t *brphiz);
+ static void CartToCylCylB(const Double_t *rphiz, const Double_t *bxyz, Double_t *brphiz);
+ static void CartToCyl(const Double_t *xyz, Double_t *rphiz);
+ static void CylToCart(const Double_t *rphiz,Double_t *xyz);
+ //
+#ifdef _INC_CREATION_ALICHEB3D_ // see AliCheb3D.h for explanation
+ void LoadData(const char* inpfile);
+ //
+ AliMagWrapCheb(const char* inputFile);
+ void SaveData(const char* outfile) const;
+ Int_t SegmentDimension(Float_t** seg,const TObjArray* par,int npar, int dim,
+ Float_t xmn,Float_t xmx,Float_t ymn,Float_t ymx,Float_t zmn,Float_t zmx);
+ //
+ void AddParamSol(const AliCheb3D* param);
+ void AddParamTPCInt(const AliCheb3D* param);
+ void AddParamDip(const AliCheb3D* param);
+ void BuildTable(Int_t npar,TObjArray *parArr, Int_t &nZSeg, Int_t &nYSeg, Int_t &nXSeg,
+ Float_t &minZ,Float_t &maxZ,Float_t **segZ,Float_t **segY,Float_t **segX,
+ Int_t **begSegY,Int_t **nSegY,Int_t **begSegX,Int_t **nSegX,Int_t **segID);
+ void BuildTableSol();
+ void BuildTableDip();
+ void BuildTableTPCInt();
+ void ResetTPCInt();
+ //
+ //
+#endif
+ //
+ protected:
+ void FieldCylSol(const Double_t *rphiz, Double_t *b) const;
+ Double_t FieldCylSolBz(const Double_t *rphiz) const;
//
protected:
- AliMagFCheb* fMeasuredMap; // Measured part of the field map
- Float_t fSolenoid; // Solenoid field setting
- //
- ClassDef(AliMagWrapCheb, 2) // Class for all Alice MagField wrapper for measured data + Tosca parameterization
-};
+ //
+ Int_t fNParamsSol; // Total number of parameterization pieces for solenoid
+ Int_t fNZSegSol; // number of distinct Z segments in Solenoid
+ Int_t fNPSegSol; // number of distinct P segments in Solenoid
+ Int_t fNRSegSol; // number of distinct R segments in Solenoid
+ Float_t* fSegZSol; //[fNZSegSol] coordinates of distinct Z segments in Solenoid
+ Float_t* fSegPSol; //[fNPSegSol] coordinated of P segments for each Zsegment in Solenoid
+ Float_t* fSegRSol; //[fNRSegSol] coordinated of R segments for each Psegment in Solenoid
+ Int_t* fBegSegPSol; //[fNPSegSol] beginning of P segments array for each Z segment
+ Int_t* fNSegPSol; //[fNZSegSol] number of P segments for each Z segment
+ Int_t* fBegSegRSol; //[fNPSegSol] beginning of R segments array for each P segment
+ Int_t* fNSegRSol; //[fNPSegSol] number of R segments for each P segment
+ Int_t* fSegIDSol; //[fNRSegSol] ID of the solenoid parameterization for given RPZ segment
+ Float_t fMinZSol; // Min Z of Solenoid parameterization
+ Float_t fMaxZSol; // Max Z of Solenoid parameterization
+ TObjArray* fParamsSol; // Parameterization pieces for Solenoid field
+ Float_t fMaxRSol; // max raduis for Solenoid field
+ //
+ Int_t fNParamsTPC; // Total number of parameterization pieces for TPCint
+ Int_t fNZSegTPC; // number of distinct Z segments in TPCint
+ Int_t fNPSegTPC; // number of distinct P segments in TPCint
+ Int_t fNRSegTPC; // number of distinct R segments in TPCint
+ Float_t* fSegZTPC; //[fNZSegTPC] coordinates of distinct Z segments in TPCint
+ Float_t* fSegPTPC; //[fNPSegTPC] coordinated of P segments for each Zsegment in TPCint
+ Float_t* fSegRTPC; //[fNRSegTPC] coordinated of R segments for each Psegment in TPCint
+ Int_t* fBegSegPTPC; //[fNPSegTPC] beginning of P segments array for each Z segment
+ Int_t* fNSegPTPC; //[fNZSegTPC] number of P segments for each Z segment
+ Int_t* fBegSegRTPC; //[fNPSegTPC] beginning of R segments array for each P segment
+ Int_t* fNSegRTPC; //[fNPSegTPC] number of R segments for each P segment
+ Int_t* fSegIDTPC; //[fNRSegTPC] ID of the TPCint parameterization for given RPZ segment
+ Float_t fMinZTPC; // Min Z of TPCint parameterization
+ Float_t fMaxZTPC; // Max Z of TPCint parameterization
+ TObjArray* fParamsTPC; // Parameterization pieces for TPCint field
+ Float_t fMaxRTPC; // max raduis for Solenoid field integral in TPC
+ //
+ Int_t fNParamsDip; // Total number of parameterization pieces for dipole
+ Int_t fNZSegDip; // number of distinct Z segments in Dipole
+ Int_t fNYSegDip; // number of distinct Y segments in Dipole
+ Int_t fNXSegDip; // number of distinct X segments in Dipole
+ Float_t* fSegZDip; //[fNZSegDip] coordinates of distinct Z segments in Dipole
+ Float_t* fSegYDip; //[fNYSegDip] coordinated of Y segments for each Zsegment in Dipole
+ Float_t* fSegXDip; //[fNXSegDip] coordinated of X segments for each Ysegment in Dipole
+ Int_t* fBegSegYDip; //[fNZSegDip] beginning of Y segments array for each Z segment
+ Int_t* fNSegYDip; //[fNZSegDip] number of Y segments for each Z segment
+ Int_t* fBegSegXDip; //[fNYSegDip] beginning of X segments array for each Y segment
+ Int_t* fNSegXDip; //[fNYSegDip] number of X segments for each Y segment
+ Int_t* fSegIDDip; //[fNXSegDip] ID of the dipole parameterization for given XYZ segment
+ Float_t fMinZDip; // Min Z of Dipole parameterization
+ Float_t fMaxZDip; // Max Z of Dipole parameterization
+ TObjArray* fParamsDip; // Parameterization pieces for Dipole field
+ //
+ ClassDef(AliMagWrapCheb,5) // Wrapper class for the set of Chebishev parameterizations of Alice mag.field
+ //
+ };
+
+
+//__________________________________________________________________________________________
+inline void AliMagWrapCheb::FieldCyl(const Double_t *rphiz, Double_t *b) const
+{
+ // compute field in Cylindircal coordinates
+ // if (rphiz[2]<GetMinZSol() || rphiz[2]>GetMaxZSol() || rphiz[0]>GetMaxRSol()) {for (int i=3;i--;) b[i]=0; return;}
+ b[0] = b[1] = b[2] = 0;
+ FieldCylSol(rphiz,b);
+}
+
+//__________________________________________________________________________________________________
+inline void AliMagWrapCheb::CylToCartCylB(const Double_t *rphiz, const Double_t *brphiz,Double_t *bxyz)
+{
+ // convert field in cylindrical coordinates to cartesian system, point is in cyl.system
+ Double_t btr = TMath::Sqrt(brphiz[0]*brphiz[0]+brphiz[1]*brphiz[1]);
+ Double_t psiPLUSphi = TMath::ATan2(brphiz[1],brphiz[0]) + rphiz[1];
+ bxyz[0] = btr*TMath::Cos(psiPLUSphi);
+ bxyz[1] = btr*TMath::Sin(psiPLUSphi);
+ bxyz[2] = brphiz[2];
+ //
+}
+
+//__________________________________________________________________________________________________
+inline void AliMagWrapCheb::CylToCartCartB(const Double_t* xyz, const Double_t *brphiz, Double_t *bxyz)
+{
+ // convert field in cylindrical coordinates to cartesian system, point is in cart.system
+ Double_t btr = TMath::Sqrt(brphiz[0]*brphiz[0]+brphiz[1]*brphiz[1]);
+ Double_t phiPLUSpsi = TMath::ATan2(xyz[1],xyz[0]) + TMath::ATan2(brphiz[1],brphiz[0]);
+ bxyz[0] = btr*TMath::Cos(phiPLUSpsi);
+ bxyz[1] = btr*TMath::Sin(phiPLUSpsi);
+ bxyz[2] = brphiz[2];
+ //
+}
+
+//__________________________________________________________________________________________________
+inline void AliMagWrapCheb::CartToCylCartB(const Double_t *xyz, const Double_t *bxyz, Double_t *brphiz)
+{
+ // convert field in cylindrical coordinates to cartesian system, poin is in cart.system
+ Double_t btr = TMath::Sqrt(bxyz[0]*bxyz[0]+bxyz[1]*bxyz[1]);
+ Double_t psiMINphi = TMath::ATan2(bxyz[1],bxyz[0]) - TMath::ATan2(xyz[1],xyz[0]);
+ //
+ brphiz[0] = btr*TMath::Cos(psiMINphi);
+ brphiz[1] = btr*TMath::Sin(psiMINphi);
+ brphiz[2] = bxyz[2];
+ //
+}
+//__________________________________________________________________________________________________
+inline void AliMagWrapCheb::CartToCylCylB(const Double_t *rphiz, const Double_t *bxyz, Double_t *brphiz)
+{
+ // convert field in cylindrical coordinates to cartesian system, point is in cyl.system
+ Double_t btr = TMath::Sqrt(bxyz[0]*bxyz[0]+bxyz[1]*bxyz[1]);
+ Double_t psiMINphi = TMath::ATan2(bxyz[1],bxyz[0]) - rphiz[1];
+ brphiz[0] = btr*TMath::Cos(psiMINphi);
+ brphiz[1] = btr*TMath::Sin(psiMINphi);
+ brphiz[2] = bxyz[2];
+ //
+}
+
+//__________________________________________________________________________________________________
+inline void AliMagWrapCheb::CartToCyl(const Double_t *xyz, Double_t *rphiz)
+{
+ rphiz[0] = TMath::Sqrt(xyz[0]*xyz[0]+xyz[1]*xyz[1]);
+ rphiz[1] = TMath::ATan2(xyz[1],xyz[0]);
+ rphiz[2] = xyz[2];
+}
+
+//__________________________________________________________________________________________________
+inline void AliMagWrapCheb::CylToCart(const Double_t *rphiz, Double_t *xyz)
+{
+ xyz[0] = rphiz[0]*TMath::Cos(rphiz[1]);
+ xyz[1] = rphiz[0]*TMath::Sin(rphiz[1]);
+ xyz[2] = rphiz[2];
+}
#endif
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