[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.                  *
 **************************************************************************/

/* $Id$ */

#include "TSystem.h"
#include "TVector.h"

#include "AliMagFCM.h"

ClassImp(AliMagFCM)

//_______________________________________________________________________
AliMagFCM::AliMagFCM():
  fXbeg(0),
  fYbeg(0),
  fZbeg(0),
  fXdel(0),
  fYdel(0),
  fZdel(0),
  fSolenoid(0),
  fXdeli(0),
  fYdeli(0),
  fZdeli(0),
  fXn(0),
  fYn(0),
  fZn(0),
  fB(0)
{
  //
  // Standard constructor
  //
  fType = kConMesh;
  fMap  = 2;
  SetSolenoidField();
}

//_______________________________________________________________________
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),
  fXbeg(0),
  fYbeg(0),
  fZbeg(0),
  fXdel(0),
  fYdel(0),
  fZdel(0),
  fSolenoid(0),
  fXdeli(0),
  fYdeli(0),
  fZdeli(0),
  fXn(0),
  fYn(0),
  fZn(0),
  fB(0)
{
  //
  // Standard constructor
  //
  fType = kConMesh;
  fMap  = 2;
  SetSolenoidField();

  if(fDebug>-1) Info("ctor",
     "%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):
  AliMagF(magf),
  fXbeg(0),
  fYbeg(0),
  fZbeg(0),
  fXdel(0),
  fYdel(0),
  fZdel(0),
  fSolenoid(0),
  fXdeli(0),
  fYdeli(0),
  fZdeli(0),
  fXn(0),
  fYn(0),
  fZn(0),
  fB(0)
{
  //
  // 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");
}
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
acd84897	16	/* $Id$ */
e2afb3b6	17
fb17acd4	18	#include "TSystem.h"
65fb704d	19	#include "TVector.h"
aee8290b	20
aee8290b	21	#include "AliMagFCM.h"
aee8290b	22
	23	ClassImp(AliMagFCM)
	24
e2afb3b6	25	//_______________________________________________________________________
	26	AliMagFCM::AliMagFCM():
	27	fXbeg(0),
	28	fYbeg(0),
	29	fZbeg(0),
	30	fXdel(0),
	31	fYdel(0),
	32	fZdel(0),
	33	fSolenoid(0),
	34	fXdeli(0),
	35	fYdeli(0),
	36	fZdeli(0),
	37	fXn(0),
	38	fYn(0),
	39	fZn(0),
	40	fB(0)
	41	{
	42	//
	43	// Standard constructor
	44	//
	45	fType = kConMesh;
	46	fMap = 2;
	47	SetSolenoidField();
	48	}
	49
	50	//_______________________________________________________________________
aee8290b	51	AliMagFCM::AliMagFCM(const char name, const char title, const Int_t integ,
e2afb3b6	52	const Float_t factor, const Float_t fmax):
	53	AliMagF(name,title,integ,factor,fmax),
	54	fXbeg(0),
	55	fYbeg(0),
	56	fZbeg(0),
	57	fXdel(0),
	58	fYdel(0),
	59	fZdel(0),
	60	fSolenoid(0),
	61	fXdeli(0),
	62	fYdeli(0),
	63	fZdeli(0),
	64	fXn(0),
	65	fYn(0),
	66	fZn(0),
	67	fB(0)
aee8290b	68	{
	69	//
	70	// Standard constructor
	71	//
	72	fType = kConMesh;
d8408e76	73	fMap = 2;
4cc8933f	74	SetSolenoidField();
4cc8933f	75
e2afb3b6	76	if(fDebug>-1) Info("ctor",
e2afb3b6	77	"%s: Constant Mesh Field %s created: map= %d, factor= %f, file= %s\n",
9e1a0ddb	78	ClassName(),fName.Data(), fMap, factor,fTitle.Data());
aee8290b	79	}
aee8290b	80
e2afb3b6	81	//_______________________________________________________________________
	82	AliMagFCM::AliMagFCM(const AliMagFCM &magf):
	83	AliMagF(magf),
	84	fXbeg(0),
	85	fYbeg(0),
	86	fZbeg(0),
	87	fXdel(0),
	88	fYdel(0),
	89	fZdel(0),
	90	fSolenoid(0),
	91	fXdeli(0),
	92	fYdeli(0),
	93	fZdeli(0),
	94	fXn(0),
	95	fYn(0),
	96	fZn(0),
	97	fB(0)
aee8290b	98	{
	99	//
	100	// Copy constructor
	101	//
	102	magf.Copy(*this);
	103	}
	104
e2afb3b6	105	//_______________________________________________________________________
aee8290b	106	void AliMagFCM::Field(Float_t x, Float_t b)
	107	{
	108	//
	109	// Method to calculate the magnetic field
	110	//
	111	Double_t ratx, raty, ratz, hix, hiy, hiz, ratx1, raty1, ratz1,
	112	bhyhz, bhylz, blyhz, blylz, bhz, blz, xl[3];
	113	const Double_t kone=1;
	114	Int_t ix, iy, iz;
	115
	116	// --- find the position in the grid ---
	117
	118	b[0]=b[1]=b[2]=0;
	119	if(-700<x[2] && x[2]<fZbeg && x[0]x[0]+(x[1]+30)(x[1]+30) < 560*560) {
4cc8933f	120	b[2]= fSolenoid;
aee8290b	121	} else {
	122	Bool_t infield=(fZbeg<=x[2] && x[2]<fZbeg+fZdel*(fZn-1)
	123	&& ( fXbeg <= TMath::Abs(x[0]) && TMath::Abs(x[0]) < fXbeg+fXdel*(fXn-1) )
	124	&& ( fYbeg <= TMath::Abs(x[1]) && TMath::Abs(x[1]) < fYbeg+fYdel*(fYn-1) ));
	125	if(infield) {
	126	xl[0]=TMath::Abs(x[0])-fXbeg;
	127	xl[1]=TMath::Abs(x[1])-fYbeg;
	128	xl[2]=x[2]-fZbeg;
	129
	130	// --- start with x
	131
	132	hix=xl[0]*fXdeli;
	133	ratx=hix-int(hix);
	134	ix=int(hix);
	135
	136	hiy=xl[1]*fYdeli;
	137	raty=hiy-int(hiy);
	138	iy=int(hiy);
	139
	140	hiz=xl[2]*fZdeli;
	141	ratz=hiz-int(hiz);
	142	iz=int(hiz);
	143
	144	if(fMap==2) {
	145	// ... simple interpolation
	146	ratx1=kone-ratx;
	147	raty1=kone-raty;
	148	ratz1=kone-ratz;
	149	bhyhz = Bx(ix ,iy+1,iz+1)ratx1+Bx(ix+1,iy+1,iz+1)ratx;
	150	bhylz = Bx(ix ,iy+1,iz )ratx1+Bx(ix+1,iy+1,iz )ratx;
	151	blyhz = Bx(ix ,iy ,iz+1)ratx1+Bx(ix+1,iy ,iz+1)ratx;
	152	blylz = Bx(ix ,iy ,iz )ratx1+Bx(ix+1,iy ,iz )ratx;
	153	bhz = blyhz raty1+bhyhz raty;
	154	blz = blylz raty1+bhylz raty;
	155	b[0] = blz ratz1+bhz ratz;
	156	//
	157	bhyhz = By(ix ,iy+1,iz+1)ratx1+By(ix+1,iy+1,iz+1)ratx;
	158	bhylz = By(ix ,iy+1,iz )ratx1+By(ix+1,iy+1,iz )ratx;
	159	blyhz = By(ix ,iy ,iz+1)ratx1+By(ix+1,iy ,iz+1)ratx;
	160	blylz = By(ix ,iy ,iz )ratx1+By(ix+1,iy ,iz )ratx;
	161	bhz = blyhz raty1+bhyhz raty;
	162	blz = blylz raty1+bhylz raty;
	163	b[1] = blz ratz1+bhz ratz;
	164	//
	165	bhyhz = Bz(ix ,iy+1,iz+1)ratx1+Bz(ix+1,iy+1,iz+1)ratx;
	166	bhylz = Bz(ix ,iy+1,iz )ratx1+Bz(ix+1,iy+1,iz )ratx;
	167	blyhz = Bz(ix ,iy ,iz+1)ratx1+Bz(ix+1,iy ,iz+1)ratx;
	168	blylz = Bz(ix ,iy ,iz )ratx1+Bz(ix+1,iy ,iz )ratx;
	169	bhz = blyhz raty1+bhyhz raty;
	170	blz = blylz raty1+bhylz raty;
	171	b[2] = blz ratz1+bhz ratz;
	172	//printf("ratx,raty,ratz,b[0],b[1],b[2] %f %f %f %f %f %f\n",
	173	//ratx,raty,ratz,b[0],b[1],b[2]);
	174	//
	175	// ... use the dipole symmetry
	176	if (x[0]*x[1] < 0) b[1]=-b[1];
	177	if (x[0]<0) b[2]=-b[2];
	178	} else {
	179	printf("Invalid field map for constant mesh %d\n",fMap);
	180	}
	181	} else {
d95ea23f	182	//This is the ZDC part
d95ea23f	183	Float_t rad2=x[0]x[0]+x[1]x[1];
006cb30c	184	if(x[2]>kCORBEG2 && x[2]<kCOREND2){
d95ea23f	185	if(rad2<kCOR2RA2){
	186	b[0] = kFCORN2;
	187	}
	188	}
	189	else if(x[2]>kZ1BEG && x[2]<kZ1END){
	190	if(rad2<kZ1RA2){
	191	b[0] = -kG1*x[1];
	192	b[1] = -kG1*x[0];
	193	}
	194	}
	195	else if(x[2]>kZ2BEG && x[2]<kZ2END){
	196	if(rad2<kZ2RA2){
	197	b[0] = kG1*x[1];
	198	b[1] = kG1*x[0];
	199	}
	200	}
	201	else if(x[2]>kZ3BEG && x[2]<kZ3END){
	202	if(rad2<kZ3RA2){
	203	b[0] = kG1*x[1];
	204	b[1] = kG1*x[0];
	205	}
	206	}
	207	else if(x[2]>kZ4BEG && x[2]<kZ4END){
	208	if(rad2<kZ4RA2){
	209	b[0] = -kG1*x[1];
	210	b[1] = -kG1*x[0];
	211	}
	212	}
	213	else if(x[2]>kD1BEG && x[2]<kD1END){
	214	if(rad2<kD1RA2){
	215	b[1] = -kFDIP;
	216	}
	217	}
	218	else if(x[2]>kD2BEG && x[2]<kD2END){
	219	if(((x[0]-kXCEN1D2)(x[0]-kXCEN1D2)+(x[1]-kYCEN1D2)(x[1]-kYCEN1D2))<kD2RA2
	220	\|\| ((x[0]-kXCEN2D2)(x[0]-kXCEN2D2)+(x[1]-kYCEN2D2)(x[1]-kYCEN2D2))<kD2RA2){
	221	b[1] = kFDIP;
aee8290b	222	}
aee8290b	223	}
d95ea23f	224
d95ea23f	225	}
aee8290b	226	}
	227	if(fFactor!=1) {
	228	b[0]*=fFactor;
	229	b[1]*=fFactor;
	230	b[2]*=fFactor;
	231	}
	232	}
	233
e2afb3b6	234	//_______________________________________________________________________
aee8290b	235	void AliMagFCM::ReadField()
	236	{
	237	//
	238	// Method to read the magnetic field map from file
	239	//
	240	FILE *magfile;
	241	Int_t ix, iy, iz, ipx, ipy, ipz;
	242	Float_t bx, by, bz;
	243	char *fname;
9e1a0ddb	244	if(fDebug) printf("%s: Reading Magnetic Field %s from file %s\n",ClassName(),fName.Data(),fTitle.Data());
aee8290b	245	fname = gSystem->ExpandPathName(fTitle.Data());
	246	magfile=fopen(fname,"r");
	247	delete [] fname;
	248	if (magfile) {
	249	fscanf(magfile,"%d %d %d %f %f %f %f %f %f",
	250	&fXn, &fYn, &fZn, &fXdel, &fYdel, &fZdel, &fXbeg, &fYbeg, &fZbeg);
9e1a0ddb	251	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	252	ClassName(),fXn, fYn, fZn, fXdel, fYdel, fZdel, fXbeg, fYbeg, fZbeg);
aee8290b	253	fXdeli=1./fXdel;
	254	fYdeli=1./fYdel;
	255	fZdeli=1./fZdel;
	256	fB = new TVector(3fXnfYn*fZn);
	257	for (iz=0; iz<fZn; iz++) {
	258	ipz=iz3(fXn*fYn);
	259	for (iy=0; iy<fYn; iy++) {
	260	ipy=ipz+iy3fXn;
	261	for (ix=0; ix<fXn; ix++) {
	262	ipx=ipy+ix*3;
	263	fscanf(magfile,"%f %f %f",&bz,&by,&bx);
	264	(*fB)(ipx+2)=bz;
	265	(*fB)(ipx+1)=by;
	266	(*fB)(ipx )=bx;
	267	}
	268	}
	269	}
	270	} else {
9e1a0ddb	271	printf("%s: File %s not found !\n",ClassName(),fTitle.Data());
aee8290b	272	exit(1);
	273	}
	274	}
	275
e2afb3b6	276	//_______________________________________________________________________
8918e700	277	void AliMagFCM::Copy(AliMagFCM & /* magf */) const
aee8290b	278	{
aee8290b	279	//
8918e700	280	// Copy *this onto magf -- Not implemented
aee8290b	281	//
	282	Fatal("Copy","Not implemented!\n");
	283	}
	284