[u/mrichter/AliRoot.git] / STEER / AliMagFCM.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/*
$Log$
Revision 1.3  2000/11/10 18:09:55  fca
New field map for the ZDC

Revision 1.2  2000/07/12 08:56:25  fca
Coding convention correction and warning removal

Revision 1.1  2000/07/11 18:24:59  fca
Coding convention corrections + few minor bug fixes

*/
#include "TVector.h"

#include "AliMagFCM.h"
#include "TSystem.h"

ClassImp(AliMagFCM)

//________________________________________
AliMagFCM::AliMagFCM(const char *name, const char *title, const Int_t integ, 
		     const Int_t map, const Float_t factor, const Float_t fmax)
  : AliMagF(name,title,integ,map,factor,fmax)
{
  //
  // Standard constructor
  //
  fType = kConMesh;
  printf("Constant Mesh Field %s created: map= %d, factor= %f, file= %s\n",
	 fName.Data(),map,factor,fTitle.Data());
}

//________________________________________
AliMagFCM::AliMagFCM(const AliMagFCM &magf)
{
  //
  // Copy constructor
  //
  magf.Copy(*this);
}

//________________________________________
void AliMagFCM::Field(Float_t *x, Float_t *b)
{
  //
  // Method to calculate the magnetic field
  //
  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;
  
  // --- find the position in the grid ---
  
  b[0]=b[1]=b[2]=0;
  if(-700<x[2] && x[2]<fZbeg && x[0]*x[0]+(x[1]+30)*(x[1]+30) < 560*560) {
    b[2]=2;
  } else  {
    Bool_t infield=(fZbeg<=x[2] && x[2]<fZbeg+fZdel*(fZn-1)
		    &&  ( fXbeg <= TMath::Abs(x[0]) && TMath::Abs(x[0]) < fXbeg+fXdel*(fXn-1) )
		    &&  ( fYbeg <= TMath::Abs(x[1]) && TMath::Abs(x[1]) < fYbeg+fYdel*(fYn-1) ));
    if(infield) {
      xl[0]=TMath::Abs(x[0])-fXbeg;
      xl[1]=TMath::Abs(x[1])-fYbeg;
      xl[2]=x[2]-fZbeg;
      
      // --- start with x
      
      hix=xl[0]*fXdeli;
      ratx=hix-int(hix);
      ix=int(hix);
      
      hiy=xl[1]*fYdeli;
      raty=hiy-int(hiy);
      iy=int(hiy);
      
      hiz=xl[2]*fZdeli;
      ratz=hiz-int(hiz);
      iz=int(hiz);
      
      if(fMap==2) {
	// ... simple interpolation
	ratx1=kone-ratx;
	raty1=kone-raty;
	ratz1=kone-ratz;
	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;
	//printf("ratx,raty,ratz,b[0],b[1],b[2] %f %f %f %f %f %f\n",
	//ratx,raty,ratz,b[0],b[1],b[2]);
	//
	// ... use the dipole symmetry
	if (x[0]*x[1] < 0) b[1]=-b[1];
	if (x[0]<0) b[2]=-b[2];
      } else {
	printf("Invalid field map for constant mesh %d\n",fMap);
      }
    } else {
//This is the ZDC part
    Float_t rad2=x[0]*x[0]+x[1]*x[1];
    if(x[2]>kCORBEG1 && x[2]<kCOREND1){
      if(rad2<kCOR1RA2){
        b[0] = kFCORN1;
      }
    }
    else if(x[2]>kCORBEG2 && x[2]<kCOREND2){
      if(rad2<kCOR2RA2){
        b[0] = kFCORN2;
      }
    }
    else if(x[2]>kZ1BEG && x[2]<kZ1END){  
      if(rad2<kZ1RA2){
        b[0] = -kG1*x[1];
        b[1] = -kG1*x[0];
      }
    }
    else if(x[2]>kZ2BEG && x[2]<kZ2END){  
      if(rad2<kZ2RA2){
        b[0] = kG1*x[1];
        b[1] = kG1*x[0];
      }
    }
    else if(x[2]>kZ3BEG && x[2]<kZ3END){  
      if(rad2<kZ3RA2){
        b[0] = kG1*x[1];
        b[1] = kG1*x[0];
      }
    }
    else if(x[2]>kZ4BEG && x[2]<kZ4END){  
      if(rad2<kZ4RA2){
        b[0] = -kG1*x[1];
        b[1] = -kG1*x[0];
      }
    }
    else if(x[2]>kD1BEG && x[2]<kD1END){ 
      if(rad2<kD1RA2){
        b[1] = -kFDIP;
      }
    }
    else if(x[2]>kD2BEG && x[2]<kD2END){
      if(((x[0]-kXCEN1D2)*(x[0]-kXCEN1D2)+(x[1]-kYCEN1D2)*(x[1]-kYCEN1D2))<kD2RA2
        || ((x[0]-kXCEN2D2)*(x[0]-kXCEN2D2)+(x[1]-kYCEN2D2)*(x[1]-kYCEN2D2))<kD2RA2){
	b[1] = kFDIP;
      }
    }
    
    }
  }
  if(fFactor!=1) {
    b[0]*=fFactor;
    b[1]*=fFactor;
    b[2]*=fFactor;
  }
}

//________________________________________
void AliMagFCM::ReadField()
{
  // 
  // Method to read the magnetic field map from file
  //
  FILE *magfile;
  Int_t ix, iy, iz, ipx, ipy, ipz;
  Float_t bx, by, bz;
  char *fname;
  printf("Reading Magnetic Field %s from file %s\n",fName.Data(),fTitle.Data());
  fname = gSystem->ExpandPathName(fTitle.Data());
  magfile=fopen(fname,"r");
  delete [] fname;
  if (magfile) {
    fscanf(magfile,"%d %d %d %f %f %f %f %f %f",
    	   &fXn, &fYn, &fZn, &fXdel, &fYdel, &fZdel, &fXbeg, &fYbeg, &fZbeg);
    printf("fXn %d, fYn %d, fZn %d, fXdel %f, fYdel %f, fZdel %f, fXbeg %f, fYbeg %f, fZbeg %f\n",
    	   fXn, fYn, fZn, fXdel, fYdel, fZdel, fXbeg, fYbeg, fZbeg);
    fXdeli=1./fXdel;
    fYdeli=1./fYdel;
    fZdeli=1./fZdel;
    fB = new TVector(3*fXn*fYn*fZn);
    for (iz=0; iz<fZn; iz++) {
      ipz=iz*3*(fXn*fYn);
      for (iy=0; iy<fYn; iy++) {
	ipy=ipz+iy*3*fXn;
	for (ix=0; ix<fXn; ix++) {
	  ipx=ipy+ix*3;
	  fscanf(magfile,"%f %f %f",&bz,&by,&bx);
	  (*fB)(ipx+2)=bz;
	  (*fB)(ipx+1)=by;
	  (*fB)(ipx  )=bx;
	}
      }
    }
  } else { 
    printf("File %s not found !\n",fTitle.Data());
    exit(1);
  }
}

//________________________________________
void AliMagFCM::Copy(AliMagFCM & /* magf */) const
{
  //
  // Copy *this onto magf -- Not implemented
  //
  Fatal("Copy","Not implemented!\n");
}

//________________________________________
AliMagFCM & AliMagFCM::operator =(const AliMagFCM &magf)
{
  magf.Copy(*this);
  return *this;
}
Commit	Line	Data
aee8290b	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	/*
	17	$Log$
65fb704d	18	Revision 1.3 2000/11/10 18:09:55 fca
	19	New field map for the ZDC
	20
d95ea23f	21	Revision 1.2 2000/07/12 08:56:25 fca
	22	Coding convention correction and warning removal
	23
8918e700	24	Revision 1.1 2000/07/11 18:24:59 fca
	25	Coding convention corrections + few minor bug fixes
	26
aee8290b	27	*/
65fb704d	28	#include "TVector.h"
aee8290b	29
	30	#include "AliMagFCM.h"
	31	#include "TSystem.h"
	32
	33	ClassImp(AliMagFCM)
	34
	35	//________________________________________
	36	AliMagFCM::AliMagFCM(const char name, const char title, const Int_t integ,
	37	const Int_t map, const Float_t factor, const Float_t fmax)
	38	: AliMagF(name,title,integ,map,factor,fmax)
	39	{
	40	//
	41	// Standard constructor
	42	//
	43	fType = kConMesh;
	44	printf("Constant Mesh Field %s created: map= %d, factor= %f, file= %s\n",
	45	fName.Data(),map,factor,fTitle.Data());
	46	}
	47
	48	//________________________________________
	49	AliMagFCM::AliMagFCM(const AliMagFCM &magf)
	50	{
	51	//
	52	// Copy constructor
	53	//
	54	magf.Copy(*this);
	55	}
	56
	57	//________________________________________
	58	void AliMagFCM::Field(Float_t x, Float_t b)
	59	{
	60	//
	61	// Method to calculate the magnetic field
	62	//
	63	Double_t ratx, raty, ratz, hix, hiy, hiz, ratx1, raty1, ratz1,
	64	bhyhz, bhylz, blyhz, blylz, bhz, blz, xl[3];
	65	const Double_t kone=1;
	66	Int_t ix, iy, iz;
	67
	68	// --- find the position in the grid ---
	69
	70	b[0]=b[1]=b[2]=0;
	71	if(-700<x[2] && x[2]<fZbeg && x[0]x[0]+(x[1]+30)(x[1]+30) < 560*560) {
	72	b[2]=2;
	73	} else {
	74	Bool_t infield=(fZbeg<=x[2] && x[2]<fZbeg+fZdel*(fZn-1)
	75	&& ( fXbeg <= TMath::Abs(x[0]) && TMath::Abs(x[0]) < fXbeg+fXdel*(fXn-1) )
	76	&& ( fYbeg <= TMath::Abs(x[1]) && TMath::Abs(x[1]) < fYbeg+fYdel*(fYn-1) ));
	77	if(infield) {
	78	xl[0]=TMath::Abs(x[0])-fXbeg;
	79	xl[1]=TMath::Abs(x[1])-fYbeg;
	80	xl[2]=x[2]-fZbeg;
	81
	82	// --- start with x
	83
	84	hix=xl[0]*fXdeli;
	85	ratx=hix-int(hix);
	86	ix=int(hix);
	87
	88	hiy=xl[1]*fYdeli;
	89	raty=hiy-int(hiy);
	90	iy=int(hiy);
	91
	92	hiz=xl[2]*fZdeli;
93	ratz=hiz-int(hiz);
94	iz=int(hiz);
95
96	if(fMap==2) {
97	// ... simple interpolation
98	ratx1=kone-ratx;
99	raty1=kone-raty;
100	ratz1=kone-ratz;
101	bhyhz = Bx(ix ,iy+1,iz+1)ratx1+Bx(ix+1,iy+1,iz+1)ratx;
102	bhylz = Bx(ix ,iy+1,iz )ratx1+Bx(ix+1,iy+1,iz )ratx;
103	blyhz = Bx(ix ,iy ,iz+1)ratx1+Bx(ix+1,iy ,iz+1)ratx;
104	blylz = Bx(ix ,iy ,iz )ratx1+Bx(ix+1,iy ,iz )ratx;
105	bhz = blyhz raty1+bhyhz raty;
106	blz = blylz raty1+bhylz raty;
107	b[0] = blz ratz1+bhz ratz;
108	//
109	bhyhz = By(ix ,iy+1,iz+1)ratx1+By(ix+1,iy+1,iz+1)ratx;
110	bhylz = By(ix ,iy+1,iz )ratx1+By(ix+1,iy+1,iz )ratx;
111	blyhz = By(ix ,iy ,iz+1)ratx1+By(ix+1,iy ,iz+1)ratx;
112	blylz = By(ix ,iy ,iz )ratx1+By(ix+1,iy ,iz )ratx;
113	bhz = blyhz raty1+bhyhz raty;
114	blz = blylz raty1+bhylz raty;
115	b[1] = blz ratz1+bhz ratz;
116	//
117	bhyhz = Bz(ix ,iy+1,iz+1)ratx1+Bz(ix+1,iy+1,iz+1)ratx;
118	bhylz = Bz(ix ,iy+1,iz )ratx1+Bz(ix+1,iy+1,iz )ratx;
119	blyhz = Bz(ix ,iy ,iz+1)ratx1+Bz(ix+1,iy ,iz+1)ratx;
120	blylz = Bz(ix ,iy ,iz )ratx1+Bz(ix+1,iy ,iz )ratx;
121	bhz = blyhz raty1+bhyhz raty;
122	blz = blylz raty1+bhylz raty;
123	b[2] = blz ratz1+bhz ratz;
124	//printf("ratx,raty,ratz,b[0],b[1],b[2] %f %f %f %f %f %f\n",
125	//ratx,raty,ratz,b[0],b[1],b[2]);
126	//
127	// ... use the dipole symmetry
128	if (x[0]*x[1] < 0) b[1]=-b[1];
129	if (x[0]<0) b[2]=-b[2];
130	} else {
131	printf("Invalid field map for constant mesh %d\n",fMap);
132	}
133	} else {
d95ea23f	134	//This is the ZDC part
	135	Float_t rad2=x[0]x[0]+x[1]x[1];
	136	if(x[2]>kCORBEG1 && x[2]<kCOREND1){
	137	if(rad2<kCOR1RA2){
	138	b[0] = kFCORN1;
	139	}
	140	}
	141	else if(x[2]>kCORBEG2 && x[2]<kCOREND2){
	142	if(rad2<kCOR2RA2){
	143	b[0] = kFCORN2;
	144	}
	145	}
	146	else if(x[2]>kZ1BEG && x[2]<kZ1END){
	147	if(rad2<kZ1RA2){
	148	b[0] = -kG1*x[1];
	149	b[1] = -kG1*x[0];
	150	}
	151	}
	152	else if(x[2]>kZ2BEG && x[2]<kZ2END){
	153	if(rad2<kZ2RA2){
	154	b[0] = kG1*x[1];
	155	b[1] = kG1*x[0];
	156	}
	157	}
	158	else if(x[2]>kZ3BEG && x[2]<kZ3END){
	159	if(rad2<kZ3RA2){
	160	b[0] = kG1*x[1];
	161	b[1] = kG1*x[0];
	162	}
	163	}
	164	else if(x[2]>kZ4BEG && x[2]<kZ4END){
	165	if(rad2<kZ4RA2){
	166	b[0] = -kG1*x[1];
	167	b[1] = -kG1*x[0];
	168	}
	169	}
	170	else if(x[2]>kD1BEG && x[2]<kD1END){
	171	if(rad2<kD1RA2){
	172	b[1] = -kFDIP;
	173	}
	174	}
	175	else if(x[2]>kD2BEG && x[2]<kD2END){
	176	if(((x[0]-kXCEN1D2)(x[0]-kXCEN1D2)+(x[1]-kYCEN1D2)(x[1]-kYCEN1D2))<kD2RA2
	177	\|\| ((x[0]-kXCEN2D2)(x[0]-kXCEN2D2)+(x[1]-kYCEN2D2)(x[1]-kYCEN2D2))<kD2RA2){
	178	b[1] = kFDIP;
aee8290b	179	}
aee8290b	180	}
d95ea23f	181
d95ea23f	182	}
aee8290b	183	}
	184	if(fFactor!=1) {
	185	b[0]*=fFactor;
	186	b[1]*=fFactor;
	187	b[2]*=fFactor;
	188	}
	189	}
	190
	191	//________________________________________
	192	void AliMagFCM::ReadField()
	193	{
	194	//
	195	// Method to read the magnetic field map from file
	196	//
	197	FILE *magfile;
	198	Int_t ix, iy, iz, ipx, ipy, ipz;
	199	Float_t bx, by, bz;
	200	char *fname;
	201	printf("Reading Magnetic Field %s from file %s\n",fName.Data(),fTitle.Data());
	202	fname = gSystem->ExpandPathName(fTitle.Data());
	203	magfile=fopen(fname,"r");
	204	delete [] fname;
	205	if (magfile) {
	206	fscanf(magfile,"%d %d %d %f %f %f %f %f %f",
	207	&fXn, &fYn, &fZn, &fXdel, &fYdel, &fZdel, &fXbeg, &fYbeg, &fZbeg);
	208	printf("fXn %d, fYn %d, fZn %d, fXdel %f, fYdel %f, fZdel %f, fXbeg %f, fYbeg %f, fZbeg %f\n",
	209	fXn, fYn, fZn, fXdel, fYdel, fZdel, fXbeg, fYbeg, fZbeg);
	210	fXdeli=1./fXdel;
	211	fYdeli=1./fYdel;
	212	fZdeli=1./fZdel;
	213	fB = new TVector(3fXnfYn*fZn);
	214	for (iz=0; iz<fZn; iz++) {
	215	ipz=iz3(fXn*fYn);
	216	for (iy=0; iy<fYn; iy++) {
	217	ipy=ipz+iy3fXn;
	218	for (ix=0; ix<fXn; ix++) {
	219	ipx=ipy+ix*3;
	220	fscanf(magfile,"%f %f %f",&bz,&by,&bx);
	221	(*fB)(ipx+2)=bz;
	222	(*fB)(ipx+1)=by;
	223	(*fB)(ipx )=bx;
	224	}
	225	}
	226	}
	227	} else {
	228	printf("File %s not found !\n",fTitle.Data());
	229	exit(1);
	230	}
	231	}
	232
	233	//________________________________________
8918e700	234	void AliMagFCM::Copy(AliMagFCM & /* magf */) const
aee8290b	235	{
aee8290b	236	//
8918e700	237	// Copy *this onto magf -- Not implemented
aee8290b	238	//
	239	Fatal("Copy","Not implemented!\n");
	240	}
	241
	242	//________________________________________
	243	AliMagFCM & AliMagFCM::operator =(const AliMagFCM &magf)
	244	{
	245	magf.Copy(*this);
	246	return *this;
	247	}