* provided "as is" without express or implied warranty. *
**************************************************************************/
-/*
-$Log$
-Revision 1.3.6.1 2002/07/24 10:08:13 alibrary
-Updating VirtualMC
-
-Revision 1.4 2002/07/10 15:06:22 morsch
-Initialize TVector* save.
-
-Revision 1.3 2002/02/26 16:13:07 morsch
-Correction in streamer.
-
-Revision 1.2 2002/02/22 14:00:20 morsch
-Protection against replication of fieldmap data in gAlice.
-
-Revision 1.1 2002/02/14 11:41:28 morsch
-Magnetic field map for ALICE for L3+muon spectrometer stored in 3 seperate
-root files.
-
-*/
+/* $Id$ */
+//-----------------------------------------------------------------------
//
+// Class to handle the field
+// I/O and interpolation
+// of the field map to return the value
+// of the magnetic field in an arbitrary position
// Author: Andreas Morsch <andreas.morsch@cern.ch>
//
+//-----------------------------------------------------------------------
-#include <TVector.h>
+#include <cstdlib>
+#include <TClass.h>
+#include <TSystem.h>
+
+#include "AliLog.h"
#include "AliFieldMap.h"
-#include "TSystem.h"
ClassImp(AliFieldMap)
-//________________________________________
-AliFieldMap::AliFieldMap()
+//_______________________________________________________________________
+AliFieldMap::AliFieldMap():
+ fXbeg(0),
+ fYbeg(0),
+ fZbeg(0),
+ fXend(0),
+ fYend(0),
+ fZend(0),
+ fXdel(0),
+ fYdel(0),
+ fZdel(0),
+ fXdeli(0),
+ fYdeli(0),
+ fZdeli(0),
+ fXn(0),
+ fYn(0),
+ fZn(0),
+ fWriteEnable(0),
+ fB(0)
{
//
// Standard constructor
//
- fB = 0;
SetWriteEnable();
}
-AliFieldMap::AliFieldMap(const char *name, const char *title)
- : TNamed(name,title)
+//_______________________________________________________________________
+AliFieldMap::AliFieldMap(const char *name, const char *title):
+ TNamed(name,title),
+ fXbeg(0),
+ fYbeg(0),
+ fZbeg(0),
+ fXend(0),
+ fYend(0),
+ fZend(0),
+ fXdel(0),
+ fYdel(0),
+ fZdel(0),
+ fXdeli(0),
+ fYdeli(0),
+ fZdeli(0),
+ fXn(0),
+ fYn(0),
+ fZn(0),
+ fWriteEnable(0),
+ fB(0)
{
//
// Standard constructor
//
- fB = 0;
ReadField();
SetWriteEnable();
}
+//_______________________________________________________________________
AliFieldMap::~AliFieldMap()
{
-//
-// Destructor
-//
+ //
+ // Destructor
+ //
delete fB;
}
-//________________________________________
-AliFieldMap::AliFieldMap(const AliFieldMap &map)
+//_______________________________________________________________________
+AliFieldMap::AliFieldMap(const AliFieldMap &map):
+ TNamed(map),
+ fXbeg(0),
+ fYbeg(0),
+ fZbeg(0),
+ fXend(0),
+ fYend(0),
+ fZend(0),
+ fXdel(0),
+ fYdel(0),
+ fZdel(0),
+ fXdeli(0),
+ fYdeli(0),
+ fZdeli(0),
+ fXn(0),
+ fYn(0),
+ fZn(0),
+ fWriteEnable(0),
+ fB(0)
{
//
// Copy constructor
map.Copy(*this);
}
-//________________________________________
+//_______________________________________________________________________
void AliFieldMap::ReadField()
{
//
// Method to read the magnetic field map from file
//
FILE* magfile;
-// FILE* endf = fopen("end.table", "r");
-// FILE* out = fopen("out", "w");
+ // FILE* endf = fopen("end.table", "r");
+ // FILE* out = fopen("out", "w");
Int_t ix, iy, iz, ipx, ipy, ipz;
Float_t bx, by, bz;
char *fname = 0;
- printf("%s: Reading Magnetic Field Map %s from file %s\n",
- ClassName(),fName.Data(),fTitle.Data());
+ AliInfo(Form("Reading Magnetic Field Map %s from file %s",
+ fName.Data(),fTitle.Data()));
fname = gSystem->ExpandPathName(fTitle.Data());
magfile = fopen(fname,"r");
Int_t nDim = fXn*fYn*fZn;
-// Float_t x,y,z,b;
+ // Float_t x,y,z,b;
fB = new TVector(3*nDim);
if (magfile) {
} // if mafile
}
-void AliFieldMap::Field(Float_t *x, Float_t *b)
+//_______________________________________________________________________
+void AliFieldMap::Field(float *x, float *b) const
{
-//
-// Use simple interpolation to obtain field at point x
-//
+ //
+ // Use simple interpolation to obtain field at point x
+ //
+ float ratx, raty, ratz, hix, hiy, hiz, ratx1, raty1, ratz1,
+ bhyhz, bhylz, blyhz, blylz, bhz, blz, xl[3];
+ const float kone=1;
+ Int_t ix, iy, iz;
+ b[0]=b[1]=b[2]=0;
+ //
+
+ xl[0] = x[0] - fXbeg;
+ xl[1] = x[1] - fYbeg;
+ xl[2] = x[2] - fZbeg;
+
+ hix=TMath::Max(0.,TMath::Min(xl[0]*fXdeli,fXn-1.0001));
+ ratx=hix-int(hix);
+ ix=int(hix);
+
+ hiy=TMath::Max(0.,TMath::Min(xl[1]*fYdeli,fYn-1.0001));
+ raty=hiy-int(hiy);
+ iy=int(hiy);
+
+ hiz=TMath::Max(0.,TMath::Min(xl[2]*fZdeli,fZn-1.0001));
+ ratz=hiz-int(hiz);
+ iz=int(hiz);
+
+ ratx1=kone-ratx;
+ raty1=kone-raty;
+ ratz1=kone-ratz;
+
+ if (!fB) return;
+
+ bhyhz = Bx(ix ,iy+1,iz+1)*ratx1+Bx(ix+1,iy+1,iz+1)*ratx;
+ bhylz = Bx(ix ,iy+1,iz )*ratx1+Bx(ix+1,iy+1,iz )*ratx;
+ blyhz = Bx(ix ,iy ,iz+1)*ratx1+Bx(ix+1,iy ,iz+1)*ratx;
+ blylz = Bx(ix ,iy ,iz )*ratx1+Bx(ix+1,iy ,iz )*ratx;
+ bhz = blyhz *raty1+bhyhz *raty;
+ blz = blylz *raty1+bhylz *raty;
+ b[0] = blz *ratz1+bhz *ratz;
+ //
+ bhyhz = By(ix ,iy+1,iz+1)*ratx1+By(ix+1,iy+1,iz+1)*ratx;
+ bhylz = By(ix ,iy+1,iz )*ratx1+By(ix+1,iy+1,iz )*ratx;
+ blyhz = By(ix ,iy ,iz+1)*ratx1+By(ix+1,iy ,iz+1)*ratx;
+ blylz = By(ix ,iy ,iz )*ratx1+By(ix+1,iy ,iz )*ratx;
+ bhz = blyhz *raty1+bhyhz *raty;
+ blz = blylz *raty1+bhylz *raty;
+ b[1] = blz *ratz1+bhz *ratz;
+ //
+ bhyhz = Bz(ix ,iy+1,iz+1)*ratx1+Bz(ix+1,iy+1,iz+1)*ratx;
+ bhylz = Bz(ix ,iy+1,iz )*ratx1+Bz(ix+1,iy+1,iz )*ratx;
+ blyhz = Bz(ix ,iy ,iz+1)*ratx1+Bz(ix+1,iy ,iz+1)*ratx;
+ blylz = Bz(ix ,iy ,iz )*ratx1+Bz(ix+1,iy ,iz )*ratx;
+ bhz = blyhz *raty1+bhyhz *raty;
+ blz = blylz *raty1+bhylz *raty;
+ b[2] = blz *ratz1+bhz *ratz;
+}
+
+//_______________________________________________________________________
+void AliFieldMap::Field(double *x, double *b) const
+{
+ //
+ // Use simple interpolation to obtain field at point x
+ //
Double_t ratx, raty, ratz, hix, hiy, hiz, ratx1, raty1, ratz1,
bhyhz, bhylz, blyhz, blylz, bhz, blz, xl[3];
const Double_t kone=1;
Int_t ix, iy, iz;
b[0]=b[1]=b[2]=0;
-//
+ //
- xl[0]=TMath::Abs(x[0])-fXbeg;
- xl[1]=TMath::Abs(x[1])-fYbeg;
- xl[2]=x[2]-fZbeg;
+ xl[0] = x[0] - fXbeg;
+ xl[1] = x[1] - fYbeg;
+ xl[2] = x[2] - fZbeg;
- hix=xl[0]*fXdeli;
+ hix=TMath::Max(0.,TMath::Min(xl[0]*fXdeli,fXn-1.0001));
ratx=hix-int(hix);
ix=int(hix);
- hiy=xl[1]*fYdeli;
+ hiy=TMath::Max(0.,TMath::Min(xl[1]*fYdeli,fYn-1.0001));
raty=hiy-int(hiy);
iy=int(hiy);
- hiz=xl[2]*fZdeli;
+ hiz=TMath::Max(0.,TMath::Min(xl[2]*fZdeli,fZn-1.0001));
ratz=hiz-int(hiz);
iz=int(hiz);
raty1=kone-raty;
ratz1=kone-ratz;
+ if (!fB) return;
+
bhyhz = Bx(ix ,iy+1,iz+1)*ratx1+Bx(ix+1,iy+1,iz+1)*ratx;
bhylz = Bx(ix ,iy+1,iz )*ratx1+Bx(ix+1,iy+1,iz )*ratx;
blyhz = Bx(ix ,iy ,iz+1)*ratx1+Bx(ix+1,iy ,iz+1)*ratx;
b[2] = blz *ratz1+bhz *ratz;
}
-//________________________________________
-void AliFieldMap::Copy(AliFieldMap & /* magf */) const
+//_______________________________________________________________________
+void AliFieldMap::Copy(TObject & /* magf */) const
{
//
// Copy *this onto magf -- Not implemented
//
- Fatal("Copy","Not implemented!\n");
+ AliFatal("Not implemented!");
}
-//________________________________________
+//_______________________________________________________________________
AliFieldMap & AliFieldMap::operator =(const AliFieldMap &magf)
{
magf.Copy(*this);
return *this;
}
+//_______________________________________________________________________
void AliFieldMap::Streamer(TBuffer &R__b)
{
// Stream an object of class AliFieldMap.
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff