2 //Author: Anders Strand Vestbo
3 //Author: Uli Frankenfeld
4 //Last Modified: 05.12.2000
6 #include "AliL3Logging.h"
7 #include "AliL3Transform.h"
10 //___________________________
13 // Transformation class for ALICE TPC.
15 ClassImp(AliL3Transform);
18 AliL3Transform::AliL3Transform(){
24 AliL3Transform::~AliL3Transform(){
27 void AliL3Transform::Init(){
29 fNTimeBins = 512; //?uli
35 fPadPitchWidthLow = 0.400000;
36 fPadPitchWidthUp = 0.600000;
37 fZWidth = 0.56599998474121093750;
38 fZSigma = 0.22880849748219134199;
43 fPi = 3.14159265358979323846;
44 for(Int_t i=0;i<36;i++){
45 fCos[i] = cos(fPi/9*i);
46 fSin[i] = sin(fPi/9*i);
49 fX[0] = 88.850006103515625;
50 fX[1] = 89.600006103515625;
51 fX[2] = 90.350006103515625;
52 fX[3] = 91.100006103515625;
53 fX[4] = 91.850006103515625;
54 fX[5] = 92.600006103515625;
55 fX[6] = 93.350006103515625;
56 fX[7] = 94.100006103515625;
57 fX[8] = 94.850006103515625;
58 fX[9] = 95.600006103515625;
59 fX[10] = 96.350006103515625;
60 fX[11] = 97.100006103515625;
61 fX[12] = 97.850006103515625;
62 fX[13] = 98.600006103515625;
63 fX[14] = 99.350006103515625;
64 fX[15] = 100.100006103515625;
65 fX[16] = 100.850006103515625;
66 fX[17] = 101.600006103515625;
67 fX[18] = 102.350006103515625;
68 fX[19] = 103.100006103515625;
69 fX[20] = 103.850006103515625;
70 fX[21] = 104.600006103515625;
71 fX[22] = 105.350006103515625;
72 fX[23] = 106.100006103515625;
73 fX[24] = 106.850006103515625;
74 fX[25] = 107.600006103515625;
75 fX[26] = 108.350006103515625;
76 fX[27] = 109.100006103515625;
77 fX[28] = 109.850006103515625;
78 fX[29] = 110.600006103515625;
79 fX[30] = 111.350006103515625;
80 fX[31] = 112.100006103515625;
81 fX[32] = 112.850006103515625;
82 fX[33] = 113.600006103515625;
83 fX[34] = 114.350006103515625;
84 fX[35] = 115.100006103515625;
85 fX[36] = 115.850006103515625;
86 fX[37] = 116.600006103515625;
87 fX[38] = 117.350006103515625;
88 fX[39] = 118.100006103515625;
89 fX[40] = 118.850006103515625;
90 fX[41] = 119.600006103515625;
91 fX[42] = 120.350006103515625;
92 fX[43] = 121.100006103515625;
93 fX[44] = 121.850006103515625;
94 fX[45] = 122.600006103515625;
95 fX[46] = 123.350006103515625;
96 fX[47] = 124.100006103515625;
97 fX[48] = 124.850006103515625;
98 fX[49] = 125.600006103515625;
99 fX[50] = 126.350006103515625;
100 fX[51] = 127.100006103515625;
101 fX[52] = 127.850006103515625;
102 fX[53] = 128.600006103515625;
103 fX[54] = 129.350006103515625;
104 fX[55] = 132.574996948242188;
105 fX[56] = 133.574996948242188;
106 fX[57] = 134.574996948242188;
107 fX[58] = 135.574996948242188;
108 fX[59] = 136.574996948242188;
109 fX[60] = 137.574996948242188;
110 fX[61] = 138.574996948242188;
111 fX[62] = 139.574996948242188;
112 fX[63] = 140.574996948242188;
113 fX[64] = 141.574996948242188;
114 fX[65] = 142.574996948242188;
115 fX[66] = 143.574996948242188;
116 fX[67] = 144.574996948242188;
117 fX[68] = 145.574996948242188;
118 fX[69] = 146.574996948242188;
119 fX[70] = 147.574996948242188;
120 fX[71] = 148.574996948242188;
121 fX[72] = 149.574996948242188;
122 fX[73] = 150.574996948242188;
123 fX[74] = 151.574996948242188;
124 fX[75] = 152.574996948242188;
125 fX[76] = 153.574996948242188;
126 fX[77] = 154.574996948242188;
127 fX[78] = 155.574996948242188;
128 fX[79] = 156.574996948242188;
129 fX[80] = 157.574996948242188;
130 fX[81] = 158.574996948242188;
131 fX[82] = 159.574996948242188;
132 fX[83] = 160.574996948242188;
133 fX[84] = 161.574996948242188;
134 fX[85] = 162.574996948242188;
135 fX[86] = 163.574996948242188;
136 fX[87] = 164.574996948242188;
137 fX[88] = 165.574996948242188;
138 fX[89] = 166.574996948242188;
139 fX[90] = 167.574996948242188;
140 fX[91] = 168.574996948242188;
141 fX[92] = 169.574996948242188;
142 fX[93] = 170.574996948242188;
143 fX[94] = 171.574996948242188;
144 fX[95] = 172.574996948242188;
145 fX[96] = 173.574996948242188;
146 fX[97] = 174.574996948242188;
147 fX[98] = 175.574996948242188;
148 fX[99] = 176.574996948242188;
149 fX[100] = 177.574996948242188;
150 fX[101] = 178.574996948242188;
151 fX[102] = 179.574996948242188;
152 fX[103] = 180.574996948242188;
153 fX[104] = 181.574996948242188;
154 fX[105] = 182.574996948242188;
155 fX[106] = 183.574996948242188;
156 fX[107] = 184.574996948242188;
157 fX[108] = 185.574996948242188;
158 fX[109] = 186.574996948242188;
159 fX[110] = 187.574996948242188;
160 fX[111] = 188.574996948242188;
161 fX[112] = 189.574996948242188;
162 fX[113] = 190.574996948242188;
163 fX[114] = 191.574996948242188;
164 fX[115] = 192.574996948242188;
165 fX[116] = 193.574996948242188;
166 fX[117] = 194.574996948242188;
167 fX[118] = 195.574996948242188;
168 fX[119] = 196.574996948242188;
169 fX[120] = 197.574996948242188;
170 fX[121] = 198.574996948242188;
171 fX[122] = 199.574996948242188;
172 fX[123] = 200.574996948242188;
173 fX[124] = 201.574996948242188;
174 fX[125] = 202.574996948242188;
175 fX[126] = 203.574996948242188;
176 fX[127] = 204.574996948242188;
177 fX[128] = 205.574996948242188;
178 fX[129] = 206.574996948242188;
179 fX[130] = 207.574996948242188;
180 fX[131] = 208.574996948242188;
181 fX[132] = 209.574996948242188;
182 fX[133] = 210.574996948242188;
183 fX[134] = 211.574996948242188;
184 fX[135] = 212.574996948242188;
185 fX[136] = 213.574996948242188;
186 fX[137] = 214.574996948242188;
187 fX[138] = 215.574996948242188;
188 fX[139] = 216.574996948242188;
189 fX[140] = 217.574996948242188;
190 fX[141] = 218.574996948242188;
191 fX[142] = 219.574996948242188;
192 fX[143] = 220.574996948242188;
193 fX[144] = 221.574996948242188;
194 fX[145] = 222.574996948242188;
195 fX[146] = 223.574996948242188;
196 fX[147] = 224.574996948242188;
197 fX[148] = 225.574996948242188;
198 fX[149] = 226.574996948242188;
199 fX[150] = 227.574996948242188;
200 fX[151] = 228.574996948242188;
201 fX[152] = 229.574996948242188;
202 fX[153] = 230.574996948242188;
203 fX[154] = 231.574996948242188;
204 fX[155] = 232.574996948242188;
205 fX[156] = 233.574996948242188;
206 fX[157] = 234.574996948242188;
207 fX[158] = 235.574996948242188;
208 fX[159] = 236.574996948242188;
209 fX[160] = 237.574996948242188;
210 fX[161] = 238.574996948242188;
211 fX[162] = 239.574996948242188;
212 fX[163] = 240.574996948242188;
213 fX[164] = 241.574996948242188;
214 fX[165] = 242.574996948242188;
215 fX[166] = 243.574996948242188;
216 fX[167] = 244.574996948242188;
217 fX[168] = 245.574996948242188;
218 fX[169] = 246.574996948242188;
219 fX[170] = 247.574996948242188;
220 fX[171] = 248.574996948242188;
221 fX[172] = 249.574996948242188;
222 fX[173] = 250.574996948242188;
400 Double_t AliL3Transform::GetEta(Float_t *xyz)
402 Double_t r3 = sqrt(xyz[0]*xyz[0]+xyz[1]*xyz[1]+xyz[2]*xyz[2]);
403 Double_t eta = 0.5 * log((r3+xyz[2])/(r3-xyz[2]));
407 Double_t AliL3Transform::GetPhi(Float_t *xyz)
410 Double_t phi = atan2(xyz[1],xyz[0]);
411 //if(phi<0) phi=phi+2*TMath::Pi();
416 Bool_t AliL3Transform::Slice2Sector(Int_t slice, Int_t slicerow, Int_t & sector, Int_t &row) const{
417 if(slicerow<0&&slicerow>=fNRow) return kFALSE;
418 if(slice<0||slice>=fNSlice) return kFALSE;
420 if(slicerow<fNRowLow){
425 sector = slice+fNSlice;
426 row = slicerow-fNRowLow;
431 Bool_t AliL3Transform::Sector2Slice(Int_t & slice, Int_t sector) const{
432 if(sector<0||sector>=fNSector) return kFALSE;
433 if(sector<fNSectorLow) slice = sector;
434 else slice = sector - fNSectorLow;
438 Bool_t AliL3Transform::Sector2Slice(Int_t & slice, Int_t & slicerow,Int_t sector, Int_t row) const{
439 if(sector<0||sector>=fNSector||row<0) return kFALSE;
440 if(sector<fNSectorLow){
441 if(row>=fNRowLow) return kFALSE;
446 if(row>=fNRowUp) return kFALSE;
447 slice = sector - fNSectorLow;
448 slicerow = row + fNRowLow;
453 Double_t AliL3Transform::Row2X(Int_t slicerow){
454 if(slicerow<0||slicerow>=fNRow) return 0;
458 void AliL3Transform::Local2Global(Float_t *xyz,Int_t slice)
460 //Transformation to global coordinate system
468 xyz[2]=xyz[2];//global z=local z
471 void AliL3Transform::Local2GlobalAngle(Float_t *angle,Int_t slice){
472 angle[0] = fmod(angle[0]+slice*fPi/9,2*fPi);
475 void AliL3Transform::Global2LocalAngle(Float_t *angle,Int_t slice){
476 angle[0] = angle[0]-slice*fPi/9;
477 if(angle[0]<0) angle[0]+=2*fPi;
480 void AliL3Transform::Raw2Local(Float_t *xyz,Int_t sector,Int_t row,Float_t pad,Float_t time)
482 //Transformation from rawdata to local coordinate system
484 Int_t slice,slicerow;
485 Sector2Slice(slice, slicerow, sector, row);
487 xyz[0]=Row2X(slicerow);
488 Int_t npads= fNPads[slicerow];
489 if(sector<fNSectorLow)
490 xyz[1]=(pad-0.5*(npads-1))*fPadPitchWidthLow;
492 xyz[1]=(pad-0.5*(npads-1))*fPadPitchWidthUp;
493 xyz[2]=fZWidth*time-3.*fZSigma;
495 Int_t nis=fNSectorLow;
496 Int_t nos=fNSectorUp;
498 if((sector<nis)/2 || ((sector-nis)<nos/2)) sign=1;
499 xyz[2]=sign*(250.-xyz[2]);
503 void AliL3Transform::Local2Global(Float_t *xyz,Int_t sector,Int_t row)
505 //Transformation to global coordinate system
506 Int_t slice,slicerow;
507 Sector2Slice(slice, slicerow, sector, row);
508 Float_t r=Row2X(slicerow);
509 Float_t cs = fCos[slice];
510 Float_t sn = fSin[slice];
512 xyz[0]=r*cs-xyz[1]*sn;
513 xyz[1]=r*sn+xyz[1]*cs;
514 xyz[2]=xyz[2];//global z=local z
517 Double_t AliL3Transform::GetMaxY(Int_t slicerow)
520 if(slicerow < fNRowLow)
521 return fPadPitchWidthLow*fNPads[slicerow]/2;
524 return fPadPitchWidthUp*fNPads[slicerow]/2;
527 void AliL3Transform::Global2Local(Float_t *xyz,Int_t sector)
530 Sector2Slice(slice, sector);
531 Float_t cs = fCos[slice];
532 Float_t sn = fSin[slice];
533 Float_t x1 = xyz[0]*cs + xyz[1]*sn;
534 Float_t y1 = -xyz[0]*sn + xyz[1]*cs;
539 void AliL3Transform::Raw2Global(Float_t *xyz,Int_t sector,Int_t row,Float_t pad,Float_t time)
541 //Transformation from raw to global coordinates
543 Raw2Local(xyz,sector,row,pad,time);
544 Local2Global(xyz,sector,row);
547 void AliL3Transform::Local2Raw(Float_t *xyz,Int_t sector,Int_t row)
549 //Transformation from local coordinates to raw
551 Int_t slice,slicerow;
552 Sector2Slice(slice, slicerow, sector, row);
554 if(sector<fNSectorLow)
555 xyz[1]=xyz[1]/fPadPitchWidthLow+0.5*(fNPads[slicerow]-1);
557 xyz[1]=xyz[1]/fPadPitchWidthUp+0.5*(fNPads[slicerow]-1);
559 Int_t nis=fNSectorLow;
560 Int_t nos=fNSectorUp;
562 if ((sector<nis/2) || ((sector-nis)<nos/2)) sign=1;
563 xyz[2]=250-sign*xyz[2];
564 xyz[2]=(xyz[2]+3.*fZSigma)/fZWidth;
567 void AliL3Transform::Global2Raw(Float_t *xyz,Int_t sector,Int_t row)
569 //Transformation from global coordinates to raw.
571 Global2Local(xyz,sector);
572 Local2Raw(xyz,sector,row);