Corrections to obey our coding conventions
[u/mrichter/AliRoot.git] / STEER / AliMagFC.cxx
CommitLineData
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/* $Id$ */
d8408e76 17
116cbefd 18//-------------------------------------------------------------------------
116cbefd 19// Constant magnetic field class
5d8718b8 20// Used by AliRun class
21// Author:
116cbefd 22//-------------------------------------------------------------------------
23
fb17acd4 24#include <stdlib.h>
aee8290b 25
26#include "AliMagFC.h"
27
28ClassImp(AliMagFC)
29
30//________________________________________
31AliMagFC::AliMagFC(const char *name, const char *title, const Int_t integ,
d8408e76 32 const Float_t factor, const Float_t fmax)
33 : AliMagF(name,title,integ,factor,fmax)
aee8290b 34{
35 //
36 // Standard constructor
37 //
aee8290b 38 fType = kConst;
d8408e76 39 fMap = 1;
aee8290b 40}
41
42//________________________________________
43void AliMagFC::Field(Float_t *x, Float_t *b)
44{
45 //
46 // Method to return the field in a point
47 //
48 b[0]=b[1]=b[2]=0;
49 if(fMap==1) {
50 if(TMath::Abs(x[2])<700 && x[0]*x[0]+(x[1]+30)*(x[1]+30) < 560*560) {
51 b[2]=2;
52 } else {
575c700d 53 if ( -725 >= x[2] && x[2] >= -1225 ) {
54 Float_t dz = TMath::Abs(-975-x[2])*0.01;
55 b[0] = - (1-0.1*dz*dz)*7;
aee8290b 56 }
57 else {
575c700d 58 ZDCField(x, b);
d95ea23f 59 }
60 }
575c700d 61 if(fFactor!=1) {
62 b[0]*=fFactor;
63 b[1]*=fFactor;
64 b[2]*=fFactor;
d95ea23f 65 }
575c700d 66 } else {
67 printf("Invalid field map for constant field %d\n",fMap);
68 exit(1);
69 }
70}
71
72
73void AliMagFC::ZDCField(Float_t *x, Float_t *b)
74{
75//This is the ZDC part
76 Float_t rad2=x[0]*x[0]+x[1]*x[1];
2e9eb88a 77
575c700d 78 if(x[2] < kCORBEG2 && x[2] > kCOREND2){
79 if(rad2<kCOR2RA2){
80 b[0] = - kFCORN2;
81 }
d95ea23f 82 }
575c700d 83 else if(x[2] < kZ1BEG && x[2] > kZ1END){
84 if(rad2<kZ1RA2){
85 b[0] = kG1*x[1];
86 b[1] = -kG1*x[0];
87 }
d95ea23f 88 }
575c700d 89 else if(x[2] < kZ2BEG && x[2] > kZ2END){
90 if(rad2<kZ2RA2){
91 b[0] = -kG1*x[1];
92 b[1] = kG1*x[0];
93 }
d95ea23f 94 }
575c700d 95 else if(x[2] < kZ3BEG && x[2] > kZ3END){
96 if(rad2<kZ3RA2){
97 b[0] = -kG1*x[1];
98 b[1] = kG1*x[0];
99 }
d95ea23f 100 }
575c700d 101 else if(x[2] < kZ4BEG && x[2] > kZ4END){
102 if(rad2<kZ4RA2){
103 b[0] = kG1*x[1];
104 b[1] = -kG1*x[0];
105 }
d95ea23f 106 }
575c700d 107 else if(x[2] < kD1BEG && x[2] > kD1END){
108 if(rad2<kD1RA2){
109 b[1] = -kFDIP;
110 }
aee8290b 111 }
575c700d 112 else if(x[2] < kD2BEG && x[2] > kD2END){
113 if(((x[0]-kXCEN1D2)*(x[0]-kXCEN1D2)+(x[1]-kYCEN1D2)*(x[1]-kYCEN1D2))<kD2RA2
114 || ((x[0]-kXCEN2D2)*(x[0]-kXCEN2D2)+(x[1]-kYCEN2D2)*(x[1]-kYCEN2D2))<kD2RA2){
115 b[1] = kFDIP;
116 }
aee8290b 117 }
575c700d 118
aee8290b 119}