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Added the magnetic field as a static member of the AliL3Transform class,
[u/mrichter/AliRoot.git] / HLT / src / AliL3Transform.cxx
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256c7399 1// $Id$
b661165c 2// Author: Anders Vestbo <mailto:vestbo@fi.uib.no>, Uli Frankenfeld <mailto:franken@fi.uib.no>
494fad94 3//*-- Copyright &copy ASV
a4e75a99 4// changes done by Constantin Loizides <mailto:loizides@ikf.physik.uni-frankfurt.de>
256c7399 5
108615fc 6
7#include "AliL3Logging.h"
8#include "AliL3Transform.h"
108615fc 9#include <math.h>
b661165c 10
11//_____________________________________________________________
108615fc 12// AliL3Transform
13//
14// Transformation class for ALICE TPC.
494fad94 15//
16// Class which contains all detector specific parameters for the TPC,
17// and different useful functions for coordinate transforms.
18//
19// The class is completely static, which means that no object needs
20// to be instantiated. Function calls should then be done like:
21//
22// AliL3Transform::GetEta(xyz);
23//
24// IMPORTANT: If used as is, default detector parameters will be used,
25// and you really have to make sure that these correspond to
26// the AliROOT version you are currently working on!!
27// You should therefore always initialize the parameters by
28//
29// AliL3Transform::Init(path);
30//
31// where path is a char*, giving the path to where file containing
32// the detector parameter is located. This file should be called
33// "l3transform.config", and can be created with macro exa/Make_Init.C.
34
35ClassImp(AliL3Transform)
36
ef79795d 37Double_t AliL3Transform::fBField = 0.2;
494fad94 38Int_t AliL3Transform::fVersion = 0;
39Int_t AliL3Transform::fNTimeBins = 446 ;
40Int_t AliL3Transform::fNRowLow = 64 ;
41Int_t AliL3Transform::fNRowUp = 112 ;
42Int_t AliL3Transform::fNSectorLow = 36 ;
43Int_t AliL3Transform::fNSectorUp = 36 ;
44Int_t AliL3Transform::fNSector = 72 ;
45Double_t AliL3Transform::fPadPitchWidthLow = 0.400000 ;
46Double_t AliL3Transform::fPadPitchWidthUp = 0.600000 ;
47Double_t AliL3Transform::fZWidth = 0.56599998474121093750 ;
48Double_t AliL3Transform::fZSigma = 0.22880849748219134199 ;
49Double_t AliL3Transform::fZOffset = 0.68642549244657402596;
50Double_t AliL3Transform::fZLength = 250.;
51Int_t AliL3Transform::fNSlice = 36 ;
52Int_t AliL3Transform::fNRow = 176 ;
53Double_t AliL3Transform::fNRotShift = 0.5 ;
54Double_t AliL3Transform::fPi = 3.141592653589793 ;
55Double_t AliL3Transform::fX[176] = {84.570007324218750,
56 85.320007324218750,
57 86.070007324218750,
58 86.820007324218750,
59 87.570007324218750,
60 88.320007324218750,
61 89.070007324218750,
62 89.820007324218750,
63 90.570007324218750,
64 91.320007324218750,
65 92.070007324218750,
66 92.820007324218750,
67 93.570007324218750,
68 94.320007324218750,
69 95.070007324218750,
70 95.820007324218750,
71 96.570007324218750,
72 97.320007324218750,
73 98.070007324218750,
74 98.820007324218750,
75 99.570007324218750,
76 100.320007324218750,
77 101.070007324218750,
78 101.820007324218750,
79 102.570007324218750,
80 103.320007324218750,
81 104.070007324218750,
82 104.820007324218750,
83 105.570007324218750,
84 106.320007324218750,
85 107.070007324218750,
86 107.820007324218750,
87 108.570007324218750,
88 109.320007324218750,
89 110.070007324218750,
90 110.820007324218750,
91 111.570007324218750,
92 112.320007324218750,
93 113.070007324218750,
94 113.820007324218750,
95 114.570007324218750,
96 115.320007324218750,
97 116.070007324218750,
98 116.820007324218750,
99 117.570007324218750,
100 118.320007324218750,
101 119.070007324218750,
102 119.820007324218750,
103 120.570007324218750,
104 121.320007324218750,
105 122.070007324218750,
106 122.820007324218750,
107 123.570007324218750,
108 124.320007324218750,
109 125.070007324218750,
110 125.820007324218750,
111 126.570007324218750,
112 127.320007324218750,
113 128.070007324218750,
114 128.820007324218750,
115 129.570007324218750,
116 130.320007324218750,
117 131.070007324218750,
118 131.820007324218750,
119 135.054992675781250,
120 136.054992675781250,
121 137.054992675781250,
122 138.054992675781250,
123 139.054992675781250,
124 140.054992675781250,
125 141.054992675781250,
126 142.054992675781250,
127 143.054992675781250,
128 144.054992675781250,
129 145.054992675781250,
130 146.054992675781250,
131 147.054992675781250,
132 148.054992675781250,
133 149.054992675781250,
134 150.054992675781250,
135 151.054992675781250,
136 152.054992675781250,
137 153.054992675781250,
138 154.054992675781250,
139 155.054992675781250,
140 156.054992675781250,
141 157.054992675781250,
142 158.054992675781250,
143 159.054992675781250,
144 160.054992675781250,
145 161.054992675781250,
146 162.054992675781250,
147 163.054992675781250,
148 164.054992675781250,
149 165.054992675781250,
150 166.054992675781250,
151 167.054992675781250,
152 168.054992675781250,
153 169.054992675781250,
154 170.054992675781250,
155 171.054992675781250,
156 172.054992675781250,
157 173.054992675781250,
158 174.054992675781250,
159 175.054992675781250,
160 176.054992675781250,
161 177.054992675781250,
162 178.054992675781250,
163 179.054992675781250,
164 180.054992675781250,
165 181.054992675781250,
166 182.054992675781250,
167 183.054992675781250,
168 184.054992675781250,
169 185.054992675781250,
170 186.054992675781250,
171 187.054992675781250,
172 188.054992675781250,
173 189.054992675781250,
174 190.054992675781250,
175 191.054992675781250,
176 192.054992675781250,
177 193.054992675781250,
178 194.054992675781250,
179 195.054992675781250,
180 196.054992675781250,
181 197.054992675781250,
182 198.054992675781250,
183 199.054992675781250,
184 200.054992675781250,
185 201.054992675781250,
186 202.054992675781250,
187 203.054992675781250,
188 204.054992675781250,
189 205.054992675781250,
190 206.054992675781250,
191 207.054992675781250,
192 208.054992675781250,
193 209.054992675781250,
194 210.054992675781250,
195 211.054992675781250,
196 212.054992675781250,
197 213.054992675781250,
198 214.054992675781250,
199 215.054992675781250,
200 216.054992675781250,
201 217.054992675781250,
202 218.054992675781250,
203 219.054992675781250,
204 220.054992675781250,
205 221.054992675781250,
206 222.054992675781250,
207 223.054992675781250,
208 224.054992675781250,
209 225.054992675781250,
210 226.054992675781250,
211 227.054992675781250,
212 228.054992675781250,
213 229.054992675781250,
214 230.054992675781250,
215 231.054992675781250,
216 232.054992675781250,
217 233.054992675781250,
218 234.054992675781250,
219 235.054992675781250,
220 236.054992675781250,
221 237.054992675781250,
222 238.054992675781250,
223 239.054992675781250,
224 240.054992675781250,
225 241.054992675781250,
226 242.054992675781250,
227 243.054992675781250,
228 244.054992675781250,
229 245.054992675781250,
230 246.054992675781250,
231};
232
233Int_t AliL3Transform::fNPads[176] = {67,
234 67,
235 67,
236 69,
237 69,
238 69,
239 71,
240 71,
241 71,
242 73,
243 73,
244 73,
245 75,
246 75,
247 75,
248 77,
249 77,
250 77,
251 79,
252 79,
253 79,
254 81,
255 81,
256 81,
257 83,
258 83,
259 83,
260 85,
261 85,
262 85,
263 87,
264 87,
265 87,
266 89,
267 89,
268 89,
269 91,
270 91,
271 91,
272 93,
273 93,
274 93,
275 95,
276 95,
277 95,
278 97,
279 97,
280 97,
281 99,
282 99,
283 99,
284 101,
285 101,
286 101,
287 103,
288 103,
289 103,
290 105,
291 105,
292 105,
293 107,
294 107,
295 107,
296 109,
297 73,
298 75,
299 75,
300 75,
301 77,
302 77,
303 77,
304 77,
305 79,
306 79,
307 79,
308 81,
309 81,
310 81,
311 83,
312 83,
313 83,
314 83,
315 85,
316 85,
317 85,
318 87,
319 87,
320 87,
321 87,
322 89,
323 89,
324 89,
325 91,
326 91,
327 91,
328 93,
329 93,
330 93,
331 93,
332 95,
333 95,
334 95,
335 97,
336 97,
337 97,
338 97,
339 99,
340 99,
341 99,
342 101,
343 101,
344 101,
345 103,
346 103,
347 103,
348 103,
349 105,
350 105,
351 105,
352 107,
353 107,
354 107,
355 107,
356 109,
357 109,
358 109,
359 111,
360 111,
361 111,
362 113,
363 113,
364 113,
365 113,
366 115,
367 115,
368 115,
369 117,
370 117,
371 117,
372 117,
373 119,
374 119,
375 119,
376 121,
377 121,
378 121,
379 123,
380 123,
381 123,
382 123,
383 125,
384 125,
385 125,
386 127,
387 127,
388 127,
389 127,
390 129,
391 129,
392 129,
393 131,
394 131,
395 131,
396 133,
397 133,
398 133,
399 133,
400 135,
401 135,
402 135,
403 137,
404 137,
405 137,
406 137,
407 139,
408 139,
409};
410
411
412
413void AliL3Transform::Init(const Char_t* path)
f59eed2d 414{
494fad94 415 //Overwrite the parameters with values stored in file "l3transform.config" in path.
416 //If file does not exist, old default values will be used.
b25c64e5 417
f59eed2d 418 Char_t *pathname=new Char_t[1024];
a4e75a99 419 strcpy(pathname,path);
420 strcat(pathname,"/l3transform.config");
494fad94 421
a4e75a99 422 FILE *fptr=fopen(pathname,"r");
423 if(!fptr){
b25c64e5 424 LOG(AliL3Log::kWarning,"AliL3Transform::Init","File Open")
425 <<"Pointer to Config File \""<<pathname<<"\" 0x0!"<<ENDLOG;
a4e75a99 426 return;
427 }
428
f59eed2d 429 Char_t d1[250], d2[100], d3[100];
430 Int_t dummy=0;
431 Double_t ddummy=0.0;
a4e75a99 432
433 while(!feof(fptr)) {
434 fscanf(fptr,"%s",d1);
435
436 if(strcmp(d1,"fNTimeBins")==0){fscanf(fptr,"%s %d %s",d2,&dummy,d3);fNTimeBins=(Int_t)dummy;}
437 else if(strcmp(d1,"fNRowLow")==0){fscanf(fptr,"%s %d %s",d2,&dummy,d3);fNRowLow=(Int_t)dummy;}
438 else if(strcmp(d1,"fNRowUp")==0){fscanf(fptr,"%s %d %s",d2,&dummy,d3);fNRowUp=(Int_t)dummy;}
439 else if(strcmp(d1,"fNSectorLow")==0){fscanf(fptr,"%s %d %s",d2,&dummy,d3);fNSectorLow=(Int_t)dummy;}
440 else if(strcmp(d1,"fNSectorUp")==0){fscanf(fptr,"%s %d %s",d2,&dummy,d3);fNSectorUp=(Int_t)dummy;}
441 else if(strcmp(d1,"fNSector")==0){fscanf(fptr,"%s %d %s",d2,&dummy,d3);fNSector=(Int_t)dummy;}
442 else if(strcmp(d1,"fPadPitchWidthLow")==0){fscanf(fptr,"%s %lf %s",d2,&ddummy,d3);fPadPitchWidthLow=(Double_t)ddummy;}
443 else if(strcmp(d1,"fPadPitchWidthUp")==0){fscanf(fptr,"%s %lf %s",d2,&ddummy,d3);fPadPitchWidthUp=(Double_t)ddummy;}
444 else if(strcmp(d1,"fZWidth")==0){fscanf(fptr,"%s %lf %s",d2,&ddummy,d3);fZWidth=(Double_t)ddummy;}
445 else if(strcmp(d1,"fZSigma")==0){fscanf(fptr,"%s %lf %s",d2,&ddummy,d3);fZSigma=(Double_t)ddummy;}
740da2a6 446 else if(strcmp(d1,"fZLength")==0){fscanf(fptr,"%s %lf %s",d2,&ddummy,d3);fZLength=(Double_t)ddummy;}
447 else if(strcmp(d1,"fZOffset")==0){fscanf(fptr,"%s %lf %s",d2,&ddummy,d3);fZOffset=(Double_t)ddummy;}
a4e75a99 448 else if(strcmp(d1,"fNSlice")==0){fscanf(fptr,"%s %d %s",d2,&dummy,d3);fNSlice=(Int_t)dummy;}
449 else if(strcmp(d1,"fNRow")==0){
450 fscanf(fptr,"%s %d %s",d2,&dummy,d3);fNRow=(Int_t)dummy;
451 if(fNRow!=176){
452 LOG(AliL3Log::kError,"AliL3Transform::Init","Overflow")<<"Number of PadRows should be 176! Check and fgrep the code for 176 to see the consequences of this major change!"<<ENDLOG;
453 }
454 }
455 else if(strcmp(d1,"fNRotShift")==0){fscanf(fptr,"%s %lf %s",d2,&ddummy,d3);fNRotShift=(Double_t)ddummy;}
456 else if(strcmp(d1,"fPi")==0){fscanf(fptr,"%s %lf %s",d2,&ddummy,d3);fPi=(Double_t)ddummy;}
457 else if(strcmp(d1,"fX[0]")==0){
458 fscanf(fptr,"%s %lf %s",d2,&ddummy,d3);fX[0]=(Double_t)ddummy;
740da2a6 459 for(Int_t i=1;i<fNRow;i++){fscanf(fptr,"%s %s %lf %s",d1,d2,&ddummy,d3);fX[i]=(Double_t)ddummy;}
a4e75a99 460 }
461 else if(strcmp(d1,"fNPads[0]")==0){
462 fscanf(fptr,"%s %d %s",d2,&dummy,d3);fNPads[0]=(Int_t)dummy;
463 for(Int_t i=1;i<fNRow;i++){fscanf(fptr,"%s %s %d %s",d1,d2,&dummy,d3);fNPads[i]=(Int_t)dummy;}
464 }
465 }
466
a4e75a99 467 fclose(fptr);
468 delete pathname;
89693986 469 fVersion=1; //new version
494fad94 470
a4e75a99 471}
472
89693986 473
108615fc 474Double_t AliL3Transform::GetEta(Float_t *xyz)
475{
476 Double_t r3 = sqrt(xyz[0]*xyz[0]+xyz[1]*xyz[1]+xyz[2]*xyz[2]);
477 Double_t eta = 0.5 * log((r3+xyz[2])/(r3-xyz[2]));
478 return eta;
479}
480
740da2a6 481void AliL3Transform::XYZtoRPhiEta(Float_t *rpe, Float_t *xyz)
482{
483 rpe[0] = sqrt(xyz[0]*xyz[0]+xyz[1]*xyz[1]+xyz[2]*xyz[2]);
484 rpe[1] = atan2(xyz[1],xyz[0]);
485 rpe[2] = 0.5 * log((rpe[0]+xyz[2])/(rpe[0]-xyz[2]));
486}
487
3a1c3849 488Double_t AliL3Transform::GetEta(Int_t padrow,Int_t pad,Int_t time)
bd7e82e0 489{
490 Float_t xyz[3];
3a1c3849 491 Int_t sector,row;
492 Slice2Sector(0,padrow,sector,row);
493 Raw2Local(xyz,sector,row,pad,time);
bd7e82e0 494
495 return GetEta(xyz);
496}
497
108615fc 498Double_t AliL3Transform::GetPhi(Float_t *xyz)
499{
108615fc 500 Double_t phi = atan2(xyz[1],xyz[0]);
501 //if(phi<0) phi=phi+2*TMath::Pi();
502 return phi;
503}
504
494fad94 505Bool_t AliL3Transform::Slice2Sector(Int_t slice, Int_t slicerow, Int_t & sector, Int_t &row)
506{
108615fc 507 if(slicerow<0&&slicerow>=fNRow) return kFALSE;
508 if(slice<0||slice>=fNSlice) return kFALSE;
509
510 if(slicerow<fNRowLow){
511 sector = slice;
512 row = slicerow;
513 }
514 else {
515 sector = slice+fNSlice;
516 row = slicerow-fNRowLow;
517 }
518 return kTRUE;
519}
520
494fad94 521Bool_t AliL3Transform::Sector2Slice(Int_t & slice, Int_t sector)
522{
108615fc 523 if(sector<0||sector>=fNSector) return kFALSE;
524 if(sector<fNSectorLow) slice = sector;
525 else slice = sector - fNSectorLow;
526 return kTRUE;
527}
528
494fad94 529Bool_t AliL3Transform::Sector2Slice(Int_t & slice, Int_t & slicerow,Int_t sector, Int_t row)
530{
108615fc 531 if(sector<0||sector>=fNSector||row<0) return kFALSE;
532 if(sector<fNSectorLow){
533 if(row>=fNRowLow) return kFALSE;
534 slice = sector;
535 slicerow = row;
536 }
537 else{
538 if(row>=fNRowUp) return kFALSE;
539 slice = sector - fNSectorLow;
540 slicerow = row + fNRowLow;
541 }
542 return kTRUE;
543}
544
545Double_t AliL3Transform::Row2X(Int_t slicerow){
546 if(slicerow<0||slicerow>=fNRow) return 0;
547 return fX[slicerow];
548}
549
550void AliL3Transform::Local2Global(Float_t *xyz,Int_t slice)
551{
552 //Transformation to global coordinate system
553 Float_t x0 = xyz[0];
554 Float_t y0 = xyz[1];
555 Float_t cs,sn;
494fad94 556 cs = cos( (2*fPi/18) * (slice+fNRotShift) );
557 sn = sin( (2*fPi/18) * (slice+fNRotShift) );
108615fc 558 xyz[0]=x0*cs-y0*sn;
559 xyz[1]=x0*sn+y0*cs;
560 xyz[2]=xyz[2];//global z=local z
561}
562
563void AliL3Transform::Local2GlobalAngle(Float_t *angle,Int_t slice){
740da2a6 564 angle[0] = fmod(angle[0]+(slice+fNRotShift)*(2*fPi/18),2*fPi);
108615fc 565}
566
567void AliL3Transform::Global2LocalAngle(Float_t *angle,Int_t slice){
740da2a6 568 angle[0] = angle[0]-(slice+fNRotShift)*(2*fPi/18);
108615fc 569 if(angle[0]<0) angle[0]+=2*fPi;
570}
571
572void AliL3Transform::Raw2Local(Float_t *xyz,Int_t sector,Int_t row,Float_t pad,Float_t time)
573{
574 //Transformation from rawdata to local coordinate system
575
576 Int_t slice,slicerow;
577 Sector2Slice(slice, slicerow, sector, row);
578
740da2a6 579 //X-Value
108615fc 580 xyz[0]=Row2X(slicerow);
740da2a6 581
582 //Y-Value
108615fc 583 Int_t npads= fNPads[slicerow];
584 if(sector<fNSectorLow)
585 xyz[1]=(pad-0.5*(npads-1))*fPadPitchWidthLow;
586 else
587 xyz[1]=(pad-0.5*(npads-1))*fPadPitchWidthUp;
740da2a6 588
589 //Z-Value (remember PULSA Delay)
590 //xyz[2]=fZWidth*time-3.*fZSigma;
591 xyz[2]=fZWidth*time-fZOffset;
0e0b1e59 592 if(slice < 18)
740da2a6 593 xyz[2]=fZLength-xyz[2];
0e0b1e59 594 else
740da2a6 595 xyz[2]=xyz[2]-fZLength;
494fad94 596
108615fc 597}
598
599void AliL3Transform::Local2Global(Float_t *xyz,Int_t sector,Int_t row)
600{
601 //Transformation to global coordinate system
602 Int_t slice,slicerow;
603 Sector2Slice(slice, slicerow, sector, row);
604 Float_t r=Row2X(slicerow);
494fad94 605 Float_t cs = cos( (2*fPi/18) * (slice+fNRotShift) );
606 Float_t sn = sin( (2*fPi/18) * (slice+fNRotShift) );
108615fc 607
608 xyz[0]=r*cs-xyz[1]*sn;
609 xyz[1]=r*sn+xyz[1]*cs;
610 xyz[2]=xyz[2];//global z=local z
611}
612
613Double_t AliL3Transform::GetMaxY(Int_t slicerow)
614{
494fad94 615
108615fc 616 if(slicerow < fNRowLow)
617 return fPadPitchWidthLow*fNPads[slicerow]/2;
618
619 else
620 return fPadPitchWidthUp*fNPads[slicerow]/2;
494fad94 621
108615fc 622}
623
2342214c 624void AliL3Transform::Global2Local(Float_t *xyz,Int_t sector,Bool_t isSlice)
108615fc 625{
2342214c 626
108615fc 627 Int_t slice;
2342214c 628 if(!isSlice)
629 Sector2Slice(slice, sector);
630 else
631 slice = sector;
494fad94 632 Float_t cs = cos( (2*fPi/18) * (slice+fNRotShift) );
633 Float_t sn = sin( (2*fPi/18) * (slice+fNRotShift) );
108615fc 634 Float_t x1 = xyz[0]*cs + xyz[1]*sn;
635 Float_t y1 = -xyz[0]*sn + xyz[1]*cs;
636 xyz[0] = x1;
637 xyz[1] = y1;
638}
639
640void AliL3Transform::Raw2Global(Float_t *xyz,Int_t sector,Int_t row,Float_t pad,Float_t time)
641{
642 //Transformation from raw to global coordinates
643
644 Raw2Local(xyz,sector,row,pad,time);
645 Local2Global(xyz,sector,row);
646}
647
648void AliL3Transform::Local2Raw(Float_t *xyz,Int_t sector,Int_t row)
649{
650 //Transformation from local coordinates to raw
494fad94 651
108615fc 652 Int_t slice,slicerow;
653 Sector2Slice(slice, slicerow, sector, row);
654
655 if(sector<fNSectorLow)
656 xyz[1]=xyz[1]/fPadPitchWidthLow+0.5*(fNPads[slicerow]-1);
657 else
658 xyz[1]=xyz[1]/fPadPitchWidthUp+0.5*(fNPads[slicerow]-1);
659 Int_t sign=-1;
660 Int_t nis=fNSectorLow;
661 Int_t nos=fNSectorUp;
662
663 if ((sector<nis/2) || ((sector-nis)<nos/2)) sign=1;
1727f1c9 664 xyz[2]=fZLength-sign*xyz[2];
665 xyz[2]=(xyz[2]+fZOffset)/fZWidth;
494fad94 666
108615fc 667}
668
669void AliL3Transform::Global2Raw(Float_t *xyz,Int_t sector,Int_t row)
670{
671 //Transformation from global coordinates to raw.
672
673 Global2Local(xyz,sector);
674 Local2Raw(xyz,sector,row);
675
676}