[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 1.7  2001/05/16 14:57:22  alibrary
New files for folders and Stack

Revision 1.6  2000/12/18 10:44:01  morsch
Possibility to set field map by passing pointer to objet of type AliMagF via
SetField().
Example:
gAlice->SetField(new AliMagFCM("Map2", "$(ALICE_ROOT)/data/field01.dat",2,1.,10.));

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;
  SetSolenoidField();

  if(fDebug>-1) printf("%s: Constant Mesh Field %s created: map= %d, factor= %f, file= %s\n",
	 ClassName(),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]= fSolenoid;
  } 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;
  if(fDebug) printf("%s: Reading Magnetic Field %s from file %s\n",ClassName(),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);
    if(fDebug>1) printf("%s: fXn %d, fYn %d, fZn %d, fXdel %f, fYdel %f, fZdel %f, fXbeg %f, fYbeg %f, fZbeg %f\n",
			ClassName(),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("%s: File %s not found !\n",ClassName(),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	$Log$
4cc8933f	18	Revision 1.7 2001/05/16 14:57:22 alibrary
	19	New files for folders and Stack
	20
9e1a0ddb	21	Revision 1.6 2000/12/18 10:44:01 morsch
	22	Possibility to set field map by passing pointer to objet of type AliMagF via
	23	SetField().
	24	Example:
	25	gAlice->SetField(new AliMagFCM("Map2", "$(ALICE_ROOT)/data/field01.dat",2,1.,10.));
	26
d8408e76	27	Revision 1.5 2000/12/01 11:20:27 alibrary
	28	Corrector dipole removed from ZDC
	29
006cb30c	30	Revision 1.4 2000/11/30 07:12:49 alibrary
	31	Introducing new Rndm and QA classes
	32
65fb704d	33	Revision 1.3 2000/11/10 18:09:55 fca
	34	New field map for the ZDC
	35
d95ea23f	36	Revision 1.2 2000/07/12 08:56:25 fca
	37	Coding convention correction and warning removal
	38
8918e700	39	Revision 1.1 2000/07/11 18:24:59 fca
	40	Coding convention corrections + few minor bug fixes
	41
aee8290b	42	*/
65fb704d	43	#include "TVector.h"
aee8290b	44
	45	#include "AliMagFCM.h"
	46	#include "TSystem.h"
	47
	48	ClassImp(AliMagFCM)
	49
	50	//________________________________________
	51	AliMagFCM::AliMagFCM(const char name, const char title, const Int_t integ,
d8408e76	52	const Float_t factor, const Float_t fmax)
d8408e76	53	: AliMagF(name,title,integ,factor,fmax)
aee8290b	54	{
	55	//
	56	// Standard constructor
	57	//
	58	fType = kConMesh;
d8408e76	59	fMap = 2;
4cc8933f	60	SetSolenoidField();
4cc8933f	61
9e1a0ddb	62	if(fDebug>-1) printf("%s: Constant Mesh Field %s created: map= %d, factor= %f, file= %s\n",
9e1a0ddb	63	ClassName(),fName.Data(), fMap, factor,fTitle.Data());
4cc8933f	64
aee8290b	65	}
	66
	67	//________________________________________
	68	AliMagFCM::AliMagFCM(const AliMagFCM &magf)
	69	{
	70	//
	71	// Copy constructor
	72	//
	73	magf.Copy(*this);
	74	}
	75
	76	//________________________________________
	77	void AliMagFCM::Field(Float_t x, Float_t b)
	78	{
	79	//
	80	// Method to calculate the magnetic field
	81	//
	82	Double_t ratx, raty, ratz, hix, hiy, hiz, ratx1, raty1, ratz1,
	83	bhyhz, bhylz, blyhz, blylz, bhz, blz, xl[3];
	84	const Double_t kone=1;
	85	Int_t ix, iy, iz;
	86
	87	// --- find the position in the grid ---
	88
	89	b[0]=b[1]=b[2]=0;
	90	if(-700<x[2] && x[2]<fZbeg && x[0]x[0]+(x[1]+30)(x[1]+30) < 560*560) {
4cc8933f	91	b[2]= fSolenoid;
aee8290b	92	} else {
	93	Bool_t infield=(fZbeg<=x[2] && x[2]<fZbeg+fZdel*(fZn-1)
	94	&& ( fXbeg <= TMath::Abs(x[0]) && TMath::Abs(x[0]) < fXbeg+fXdel*(fXn-1) )
	95	&& ( fYbeg <= TMath::Abs(x[1]) && TMath::Abs(x[1]) < fYbeg+fYdel*(fYn-1) ));
	96	if(infield) {
	97	xl[0]=TMath::Abs(x[0])-fXbeg;
	98	xl[1]=TMath::Abs(x[1])-fYbeg;
	99	xl[2]=x[2]-fZbeg;
	100
	101	// --- start with x
	102
	103	hix=xl[0]*fXdeli;
	104	ratx=hix-int(hix);
	105	ix=int(hix);
	106
	107	hiy=xl[1]*fYdeli;
	108	raty=hiy-int(hiy);
	109	iy=int(hiy);
	110
	111	hiz=xl[2]*fZdeli;
	112	ratz=hiz-int(hiz);
	113	iz=int(hiz);
	114
	115	if(fMap==2) {
	116	// ... simple interpolation
	117	ratx1=kone-ratx;
	118	raty1=kone-raty;
	119	ratz1=kone-ratz;
	120	bhyhz = Bx(ix ,iy+1,iz+1)ratx1+Bx(ix+1,iy+1,iz+1)ratx;
	121	bhylz = Bx(ix ,iy+1,iz )ratx1+Bx(ix+1,iy+1,iz )ratx;
	122	blyhz = Bx(ix ,iy ,iz+1)ratx1+Bx(ix+1,iy ,iz+1)ratx;
	123	blylz = Bx(ix ,iy ,iz )ratx1+Bx(ix+1,iy ,iz )ratx;
	124	bhz = blyhz raty1+bhyhz raty;
	125	blz = blylz raty1+bhylz raty;
	126	b[0] = blz ratz1+bhz ratz;
	127	//
	128	bhyhz = By(ix ,iy+1,iz+1)ratx1+By(ix+1,iy+1,iz+1)ratx;
	129	bhylz = By(ix ,iy+1,iz )ratx1+By(ix+1,iy+1,iz )ratx;
	130	blyhz = By(ix ,iy ,iz+1)ratx1+By(ix+1,iy ,iz+1)ratx;
	131	blylz = By(ix ,iy ,iz )ratx1+By(ix+1,iy ,iz )ratx;
	132	bhz = blyhz raty1+bhyhz raty;
	133	blz = blylz raty1+bhylz raty;
	134	b[1] = blz ratz1+bhz ratz;
	135	//
	136	bhyhz = Bz(ix ,iy+1,iz+1)ratx1+Bz(ix+1,iy+1,iz+1)ratx;
	137	bhylz = Bz(ix ,iy+1,iz )ratx1+Bz(ix+1,iy+1,iz )ratx;
	138	blyhz = Bz(ix ,iy ,iz+1)ratx1+Bz(ix+1,iy ,iz+1)ratx;
	139	blylz = Bz(ix ,iy ,iz )ratx1+Bz(ix+1,iy ,iz )ratx;
	140	bhz = blyhz raty1+bhyhz raty;
	141	blz = blylz raty1+bhylz raty;
	142	b[2] = blz ratz1+bhz ratz;
	143	//printf("ratx,raty,ratz,b[0],b[1],b[2] %f %f %f %f %f %f\n",
	144	//ratx,raty,ratz,b[0],b[1],b[2]);
	145	//
	146	// ... use the dipole symmetry
	147	if (x[0]*x[1] < 0) b[1]=-b[1];
	148	if (x[0]<0) b[2]=-b[2];
	149	} else {
	150	printf("Invalid field map for constant mesh %d\n",fMap);
	151	}
	152	} else {
d95ea23f	153	//This is the ZDC part
d95ea23f	154	Float_t rad2=x[0]x[0]+x[1]x[1];
006cb30c	155	if(x[2]>kCORBEG2 && x[2]<kCOREND2){
d95ea23f	156	if(rad2<kCOR2RA2){
	157	b[0] = kFCORN2;
	158	}
	159	}
	160	else if(x[2]>kZ1BEG && x[2]<kZ1END){
	161	if(rad2<kZ1RA2){
	162	b[0] = -kG1*x[1];
	163	b[1] = -kG1*x[0];
	164	}
	165	}
	166	else if(x[2]>kZ2BEG && x[2]<kZ2END){
	167	if(rad2<kZ2RA2){
	168	b[0] = kG1*x[1];
	169	b[1] = kG1*x[0];
	170	}
	171	}
	172	else if(x[2]>kZ3BEG && x[2]<kZ3END){
	173	if(rad2<kZ3RA2){
	174	b[0] = kG1*x[1];
	175	b[1] = kG1*x[0];
	176	}
	177	}
	178	else if(x[2]>kZ4BEG && x[2]<kZ4END){
	179	if(rad2<kZ4RA2){
	180	b[0] = -kG1*x[1];
	181	b[1] = -kG1*x[0];
	182	}
	183	}
	184	else if(x[2]>kD1BEG && x[2]<kD1END){
	185	if(rad2<kD1RA2){
	186	b[1] = -kFDIP;
	187	}
	188	}
	189	else if(x[2]>kD2BEG && x[2]<kD2END){
	190	if(((x[0]-kXCEN1D2)(x[0]-kXCEN1D2)+(x[1]-kYCEN1D2)(x[1]-kYCEN1D2))<kD2RA2
	191	\|\| ((x[0]-kXCEN2D2)(x[0]-kXCEN2D2)+(x[1]-kYCEN2D2)(x[1]-kYCEN2D2))<kD2RA2){
	192	b[1] = kFDIP;
aee8290b	193	}
aee8290b	194	}
d95ea23f	195
d95ea23f	196	}
aee8290b	197	}
	198	if(fFactor!=1) {
	199	b[0]*=fFactor;
	200	b[1]*=fFactor;
	201	b[2]*=fFactor;
	202	}
	203	}
	204
	205	//________________________________________
	206	void AliMagFCM::ReadField()
	207	{
	208	//
	209	// Method to read the magnetic field map from file
	210	//
	211	FILE *magfile;
	212	Int_t ix, iy, iz, ipx, ipy, ipz;
	213	Float_t bx, by, bz;
	214	char *fname;
9e1a0ddb	215	if(fDebug) printf("%s: Reading Magnetic Field %s from file %s\n",ClassName(),fName.Data(),fTitle.Data());
aee8290b	216	fname = gSystem->ExpandPathName(fTitle.Data());
	217	magfile=fopen(fname,"r");
	218	delete [] fname;
	219	if (magfile) {
	220	fscanf(magfile,"%d %d %d %f %f %f %f %f %f",
	221	&fXn, &fYn, &fZn, &fXdel, &fYdel, &fZdel, &fXbeg, &fYbeg, &fZbeg);
9e1a0ddb	222	if(fDebug>1) printf("%s: fXn %d, fYn %d, fZn %d, fXdel %f, fYdel %f, fZdel %f, fXbeg %f, fYbeg %f, fZbeg %f\n",
9e1a0ddb	223	ClassName(),fXn, fYn, fZn, fXdel, fYdel, fZdel, fXbeg, fYbeg, fZbeg);
aee8290b	224	fXdeli=1./fXdel;
	225	fYdeli=1./fYdel;
	226	fZdeli=1./fZdel;
	227	fB = new TVector(3fXnfYn*fZn);
	228	for (iz=0; iz<fZn; iz++) {
	229	ipz=iz3(fXn*fYn);
	230	for (iy=0; iy<fYn; iy++) {
	231	ipy=ipz+iy3fXn;
	232	for (ix=0; ix<fXn; ix++) {
	233	ipx=ipy+ix*3;
	234	fscanf(magfile,"%f %f %f",&bz,&by,&bx);
	235	(*fB)(ipx+2)=bz;
	236	(*fB)(ipx+1)=by;
	237	(*fB)(ipx )=bx;
	238	}
	239	}
	240	}
	241	} else {
9e1a0ddb	242	printf("%s: File %s not found !\n",ClassName(),fTitle.Data());
aee8290b	243	exit(1);
	244	}
	245	}
	246
	247	//________________________________________
8918e700	248	void AliMagFCM::Copy(AliMagFCM & /* magf */) const
aee8290b	249	{
aee8290b	250	//
8918e700	251	// Copy *this onto magf -- Not implemented
aee8290b	252	//
	253	Fatal("Copy","Not implemented!\n");
	254	}
	255
	256	//________________________________________
	257	AliMagFCM & AliMagFCM::operator =(const AliMagFCM &magf)
	258	{
	259	magf.Copy(*this);
	260	return *this;
	261	}