[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 1.5  2000/12/01 11:20:27  alibrary
Corrector dipole removed from ZDC

Revision 1.4  2000/11/30 07:12:49  alibrary
Introducing new Rndm and QA classes

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 Float_t factor, const Float_t fmax)
  : AliMagF(name,title,integ,factor,fmax)
{
  //
  // Standard constructor
  //
  fType = kConMesh;
  fMap  = 2;
  
  printf("Constant Mesh Field %s created: map= %d, factor= %f, file= %s\n",
	 fName.Data(), fMap, 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]>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	$Log$
d8408e76	18	Revision 1.5 2000/12/01 11:20:27 alibrary
	19	Corrector dipole removed from ZDC
	20
006cb30c	21	Revision 1.4 2000/11/30 07:12:49 alibrary
	22	Introducing new Rndm and QA classes
	23
65fb704d	24	Revision 1.3 2000/11/10 18:09:55 fca
	25	New field map for the ZDC
	26
d95ea23f	27	Revision 1.2 2000/07/12 08:56:25 fca
	28	Coding convention correction and warning removal
	29
8918e700	30	Revision 1.1 2000/07/11 18:24:59 fca
	31	Coding convention corrections + few minor bug fixes
	32
aee8290b	33	*/
65fb704d	34	#include "TVector.h"
aee8290b	35
	36	#include "AliMagFCM.h"
	37	#include "TSystem.h"
	38
	39	ClassImp(AliMagFCM)
	40
	41	//________________________________________
	42	AliMagFCM::AliMagFCM(const char name, const char title, const Int_t integ,
d8408e76	43	const Float_t factor, const Float_t fmax)
d8408e76	44	: AliMagF(name,title,integ,factor,fmax)
aee8290b	45	{
	46	//
	47	// Standard constructor
	48	//
	49	fType = kConMesh;
d8408e76	50	fMap = 2;
d8408e76	51
aee8290b	52	printf("Constant Mesh Field %s created: map= %d, factor= %f, file= %s\n",
d8408e76	53	fName.Data(), fMap, factor,fTitle.Data());
aee8290b	54	}
	55
	56	//________________________________________
	57	AliMagFCM::AliMagFCM(const AliMagFCM &magf)
	58	{
	59	//
	60	// Copy constructor
	61	//
	62	magf.Copy(*this);
	63	}
	64
	65	//________________________________________
	66	void AliMagFCM::Field(Float_t x, Float_t b)
	67	{
	68	//
	69	// Method to calculate the magnetic field
	70	//
	71	Double_t ratx, raty, ratz, hix, hiy, hiz, ratx1, raty1, ratz1,
	72	bhyhz, bhylz, blyhz, blylz, bhz, blz, xl[3];
	73	const Double_t kone=1;
	74	Int_t ix, iy, iz;
	75
	76	// --- find the position in the grid ---
	77
	78	b[0]=b[1]=b[2]=0;
	79	if(-700<x[2] && x[2]<fZbeg && x[0]x[0]+(x[1]+30)(x[1]+30) < 560*560) {
	80	b[2]=2;
	81	} else {
	82	Bool_t infield=(fZbeg<=x[2] && x[2]<fZbeg+fZdel*(fZn-1)
	83	&& ( fXbeg <= TMath::Abs(x[0]) && TMath::Abs(x[0]) < fXbeg+fXdel*(fXn-1) )
	84	&& ( fYbeg <= TMath::Abs(x[1]) && TMath::Abs(x[1]) < fYbeg+fYdel*(fYn-1) ));
	85	if(infield) {
	86	xl[0]=TMath::Abs(x[0])-fXbeg;
	87	xl[1]=TMath::Abs(x[1])-fYbeg;
	88	xl[2]=x[2]-fZbeg;
	89
	90	// --- start with x
	91
	92	hix=xl[0]*fXdeli;
	93	ratx=hix-int(hix);
	94	ix=int(hix);
	95
	96	hiy=xl[1]*fYdeli;
	97	raty=hiy-int(hiy);
	98	iy=int(hiy);
	99
	100	hiz=xl[2]*fZdeli;
	101	ratz=hiz-int(hiz);
	102	iz=int(hiz);
	103
	104	if(fMap==2) {
	105	// ... simple interpolation
	106	ratx1=kone-ratx;
	107	raty1=kone-raty;
	108	ratz1=kone-ratz;
	109	bhyhz = Bx(ix ,iy+1,iz+1)ratx1+Bx(ix+1,iy+1,iz+1)ratx;
	110	bhylz = Bx(ix ,iy+1,iz )ratx1+Bx(ix+1,iy+1,iz )ratx;
	111	blyhz = Bx(ix ,iy ,iz+1)ratx1+Bx(ix+1,iy ,iz+1)ratx;
	112	blylz = Bx(ix ,iy ,iz )ratx1+Bx(ix+1,iy ,iz )ratx;
	113	bhz = blyhz raty1+bhyhz raty;
	114	blz = blylz raty1+bhylz raty;
	115	b[0] = blz ratz1+bhz ratz;
	116	//
	117	bhyhz = By(ix ,iy+1,iz+1)ratx1+By(ix+1,iy+1,iz+1)ratx;
118	bhylz = By(ix ,iy+1,iz )ratx1+By(ix+1,iy+1,iz )ratx;
119	blyhz = By(ix ,iy ,iz+1)ratx1+By(ix+1,iy ,iz+1)ratx;
120	blylz = By(ix ,iy ,iz )ratx1+By(ix+1,iy ,iz )ratx;
121	bhz = blyhz raty1+bhyhz raty;
122	blz = blylz raty1+bhylz raty;
123	b[1] = blz ratz1+bhz ratz;
124	//
125	bhyhz = Bz(ix ,iy+1,iz+1)ratx1+Bz(ix+1,iy+1,iz+1)ratx;
126	bhylz = Bz(ix ,iy+1,iz )ratx1+Bz(ix+1,iy+1,iz )ratx;
127	blyhz = Bz(ix ,iy ,iz+1)ratx1+Bz(ix+1,iy ,iz+1)ratx;
128	blylz = Bz(ix ,iy ,iz )ratx1+Bz(ix+1,iy ,iz )ratx;
129	bhz = blyhz raty1+bhyhz raty;
130	blz = blylz raty1+bhylz raty;
131	b[2] = blz ratz1+bhz ratz;
132	//printf("ratx,raty,ratz,b[0],b[1],b[2] %f %f %f %f %f %f\n",
133	//ratx,raty,ratz,b[0],b[1],b[2]);
134	//
135	// ... use the dipole symmetry
136	if (x[0]*x[1] < 0) b[1]=-b[1];
137	if (x[0]<0) b[2]=-b[2];
138	} else {
139	printf("Invalid field map for constant mesh %d\n",fMap);
140	}
141	} else {
d95ea23f	142	//This is the ZDC part
d95ea23f	143	Float_t rad2=x[0]x[0]+x[1]x[1];
006cb30c	144	if(x[2]>kCORBEG2 && x[2]<kCOREND2){
d95ea23f	145	if(rad2<kCOR2RA2){
	146	b[0] = kFCORN2;
	147	}
	148	}
	149	else if(x[2]>kZ1BEG && x[2]<kZ1END){
	150	if(rad2<kZ1RA2){
	151	b[0] = -kG1*x[1];
	152	b[1] = -kG1*x[0];
	153	}
	154	}
	155	else if(x[2]>kZ2BEG && x[2]<kZ2END){
	156	if(rad2<kZ2RA2){
	157	b[0] = kG1*x[1];
	158	b[1] = kG1*x[0];
	159	}
	160	}
	161	else if(x[2]>kZ3BEG && x[2]<kZ3END){
	162	if(rad2<kZ3RA2){
	163	b[0] = kG1*x[1];
	164	b[1] = kG1*x[0];
	165	}
	166	}
	167	else if(x[2]>kZ4BEG && x[2]<kZ4END){
	168	if(rad2<kZ4RA2){
	169	b[0] = -kG1*x[1];
	170	b[1] = -kG1*x[0];
	171	}
	172	}
	173	else if(x[2]>kD1BEG && x[2]<kD1END){
	174	if(rad2<kD1RA2){
	175	b[1] = -kFDIP;
	176	}
	177	}
	178	else if(x[2]>kD2BEG && x[2]<kD2END){
	179	if(((x[0]-kXCEN1D2)(x[0]-kXCEN1D2)+(x[1]-kYCEN1D2)(x[1]-kYCEN1D2))<kD2RA2
	180	\|\| ((x[0]-kXCEN2D2)(x[0]-kXCEN2D2)+(x[1]-kYCEN2D2)(x[1]-kYCEN2D2))<kD2RA2){
	181	b[1] = kFDIP;
aee8290b	182	}
aee8290b	183	}
d95ea23f	184
d95ea23f	185	}
aee8290b	186	}
	187	if(fFactor!=1) {
	188	b[0]*=fFactor;
	189	b[1]*=fFactor;
	190	b[2]*=fFactor;
	191	}
	192	}
	193
	194	//________________________________________
	195	void AliMagFCM::ReadField()
	196	{
	197	//
	198	// Method to read the magnetic field map from file
	199	//
	200	FILE *magfile;
	201	Int_t ix, iy, iz, ipx, ipy, ipz;
	202	Float_t bx, by, bz;
	203	char *fname;
	204	printf("Reading Magnetic Field %s from file %s\n",fName.Data(),fTitle.Data());
	205	fname = gSystem->ExpandPathName(fTitle.Data());
	206	magfile=fopen(fname,"r");
	207	delete [] fname;
	208	if (magfile) {
	209	fscanf(magfile,"%d %d %d %f %f %f %f %f %f",
	210	&fXn, &fYn, &fZn, &fXdel, &fYdel, &fZdel, &fXbeg, &fYbeg, &fZbeg);
	211	printf("fXn %d, fYn %d, fZn %d, fXdel %f, fYdel %f, fZdel %f, fXbeg %f, fYbeg %f, fZbeg %f\n",
	212	fXn, fYn, fZn, fXdel, fYdel, fZdel, fXbeg, fYbeg, fZbeg);
	213	fXdeli=1./fXdel;
	214	fYdeli=1./fYdel;
	215	fZdeli=1./fZdel;
	216	fB = new TVector(3fXnfYn*fZn);
	217	for (iz=0; iz<fZn; iz++) {
	218	ipz=iz3(fXn*fYn);
	219	for (iy=0; iy<fYn; iy++) {
	220	ipy=ipz+iy3fXn;
	221	for (ix=0; ix<fXn; ix++) {
	222	ipx=ipy+ix*3;
	223	fscanf(magfile,"%f %f %f",&bz,&by,&bx);
	224	(*fB)(ipx+2)=bz;
	225	(*fB)(ipx+1)=by;
	226	(*fB)(ipx )=bx;
	227	}
	228	}
	229	}
	230	} else {
	231	printf("File %s not found !\n",fTitle.Data());
	232	exit(1);
	233	}
	234	}
	235
	236	//________________________________________
8918e700	237	void AliMagFCM::Copy(AliMagFCM & /* magf */) const
aee8290b	238	{
aee8290b	239	//
8918e700	240	// Copy *this onto magf -- Not implemented
aee8290b	241	//
	242	Fatal("Copy","Not implemented!\n");
	243	}
	244
	245	//________________________________________
	246	AliMagFCM & AliMagFCM::operator =(const AliMagFCM &magf)
	247	{
	248	magf.Copy(*this);
	249	return *this;
	250	}