3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
8 //----------------------------------------------------------------------
9 // Basic magnetic field class
10 // Used in all the detectors, and also in the traking classes
12 //----------------------------------------------------------------------
16 enum Field_t {kUndef=1, kConst=1, kConMesh=2, kDipoMap=3};
18 class AliMagF : public TNamed {
22 AliMagF(const char *name, const char *title, Int_t integ,
23 Float_t factor = 1., Float_t fmax = 10.);
25 virtual void Field(Float_t *x, Float_t *b) const;
26 virtual Int_t Type() const {return fType;}
27 virtual Float_t Max() const {return fMax;}
28 virtual Int_t Map() const {return fMap;}
29 virtual Int_t Integ() const {return fInteg;}
30 virtual Int_t PrecInteg() const {return fPrecInteg;}
31 virtual Float_t Factor() const {return fFactor;}
32 virtual void ReadField() {}
33 virtual Float_t SolenoidField() const {return 2.;}
34 virtual void SetPrecInteg(Int_t integ) {fPrecInteg = integ;}
35 static void SetReadField(Bool_t flag = kTRUE) {fgReadField = flag;}
37 Int_t fMap; // Field Map identifier
38 Int_t fType; // Mag Field type
39 Int_t fInteg; // Default integration method as indicated in Geant
40 Int_t fPrecInteg; // Alternative integration method, e.g. for higher precision
41 Float_t fFactor; // Multiplicative factor
42 Float_t fMax; // Max Field as indicated in Geant
43 static Bool_t fgReadField; // Flag for reading the field from file (if available)
44 ClassDef(AliMagF,4) //Base class for all Alice MagField