Coding rule violations corrected.
[u/mrichter/AliRoot.git] / ITS / AliITSsegmentationSPD.cxx
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b0f5e3fc 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
b0f5e3fc 16#include "AliITSsegmentationSPD.h"
55d2c544 17//#include "AliITSgeom.h"
18//////////////////////////////////////////////////////
19// Segmentation class for //
20// pixels //
21// //
22//////////////////////////////////////////////////////
b0f5e3fc 23ClassImp(AliITSsegmentationSPD)
24
55d2c544 25//_____________________________________________________________________________
26 AliITSsegmentationSPD::AliITSsegmentationSPD(): AliITSsegmentation(){
27 // Default constructor
28 fNpx = 0;
29 fNpz = 0;
30 for(Int_t k=0; k<256; k++){
31 fCellSizeX[k] = 0.;
32 fCellSizeZ[k] = 0.;
33 }
34}
b0f5e3fc 35
55d2c544 36//_____________________________________________________________________________
37Float_t AliITSsegmentationSPD::ColFromZ300(Float_t z) const {
b0f5e3fc 38// Get column number for each z-coordinate taking into account the
39// extra pixels in z direction assuming 300 micron sized pixels.
40 Float_t col = 0.0;
41 Float_t pitchz = 300.0;
42 col = Float_t (z/pitchz);
43 return col;
44}
45//_____________________________________________________________________________
55d2c544 46Float_t AliITSsegmentationSPD::ZFromCol300(Int_t col) const {
b0f5e3fc 47// same comments as above
48// Get z-coordinate for each colunm number
49 Float_t pitchz = 300.0;
50 Float_t z = 0.0;
51 z = (col+0.5)*pitchz;
52 return z;
53}
54//_____________________________________________________________________________
55d2c544 55Float_t AliITSsegmentationSPD::ZpitchFromCol300(Int_t col) const {
b0f5e3fc 56 // returns Z pixel pitch for 300 micron pixels.
ac74f489 57
58 col = 0; // done to remove unused variable warning.
59 return 300.0;
b0f5e3fc 60}
61//_____________________________________________________________________________
55d2c544 62Float_t AliITSsegmentationSPD::ColFromZ(Float_t z) const {
f1e07e4b 63 // hard-wired - keep it like this till we can parametrise
64 // and get rid of AliITSgeomSPD425
65 // Get column number for each z-coordinate taking into account the
66 // extra pixels in z direction
67 Int_t i;
68 Float_t s,col;
5d3918d6 69
f1e07e4b 70 if(z<0||z>fDz){
71 Error("ColFromZ","z=%f outside of range 0.0<=z<fDz=%f",z,fDz);
72 return 0.0; // error
73 } // end if outsize of detector
74 s = 0.0;
75 i = -1;
76 while(z>s){
77 i++;
78 s += fCellSizeZ[i];
79 } // end while
80 s -= fCellSizeZ[i];
81 col = (Float_t) i + (z-s)/fCellSizeZ[i];
82 return col;
83
84/*
b0f5e3fc 85 Float_t col = 0;
86 Float_t pitchz = 425;
87 if( z < 13175) {
88 col = Float_t(z/pitchz);
89 } else if( z < 14425) {
90 pitchz = 625;
91 col = 31 + (z - 13175)/pitchz;
92 } else if( z < 27175) {
93 col = 33 + (z - 14425)/pitchz;
94 } else if( z < 28425) {
95 pitchz = 625;
96 col = 63 + (z - 27175)/pitchz;
97 } else if( z < 41175) {
98 col = 65 + (z - 28425)/pitchz;
99 } else if( z < 42425) {
100 pitchz = 625;
101 col = 95 + (z - 41175)/pitchz;
102 } else if( z < 55175) {
103 col = 97 + (z - 42425)/pitchz;
104 } else if( z < 56425) {
105 pitchz = 625;
106 col = 127 + (z - 55175)/pitchz;
107 } else if( z < 69175) {
108 col = 129 + (z - 56425)/pitchz;
109 } else if( z < 70425) {
110 pitchz = 625;
111 col = 159 + (z - 69175)/pitchz;
112 } else if( z < 83600) {
113 col = 161 + (z - 70425)/pitchz;
114 }
f1e07e4b 115 return TMath::Abs(col);*/
b0f5e3fc 116}
117
118//_____________________________________________________________________________
55d2c544 119Float_t AliITSsegmentationSPD::ZFromCol(Int_t col) const {
f1e07e4b 120 // same comments as above
121 // Get z-coordinate for each colunm number
122 Int_t i;
123 Float_t z;
5d3918d6 124
f1e07e4b 125 if(col<0||col>=fNpz){
126 Error("ZFromCol","col=%d outside of range 0<=col<fNpZ=%d",col,fNpz);
127 return 0.0; // error
128 } // end if outsize of detector
129 z = 0.0;
130 for(i=0;i<col;i++) z += fCellSizeZ[i];
131 z += 0.5*fCellSizeZ[col];
132 return z;
133
134/*
b0f5e3fc 135 Float_t pitchz = 425;
136 Float_t z = 0;
137 if( col >=0 && col <= 30 ) {
138 z = (col + 0.5)*pitchz;
139 } else if( col >= 31 && col <= 32) {
140 pitchz = 625;
141 z = 13175 + (col -31 + 0.5)*pitchz;
142 } else if( col >= 33 && col <= 62) {
143 z = 14425 + (col -33 + 0.5)*pitchz;
144 } else if( col >= 63 && col <= 64) {
145 pitchz = 625;
146 z = 27175 + (col -63 + 0.5)*pitchz;
147 } else if( col >= 65 && col <= 94) {
148 z = 28425 + (col -65 + 0.5)*pitchz;
149 } else if( col >= 95 && col <= 96) {
150 pitchz = 625;
151 z = 41175 + (col -95 + 0.5)*pitchz;
152 } else if( col >= 97 && col <= 126) {
153 z = 42425 + (col -97 + 0.5)*pitchz;
154 } else if( col >= 127 && col <= 128) {
155 pitchz = 625;
156 z = 55175 + (col -127 + 0.5)*pitchz;
157 } else if( col >= 129 && col <= 158) {
158 z = 56425 + (col -129 + 0.5)*pitchz;
159 } else if( col >= 159 && col <= 160) {
160 pitchz = 625;
161 z = 69175 + (col -159 + 0.5)*pitchz;
162 } else if( col >= 161 && col <= 191) {
163 z = 70425 + (col -161 + 0.5)*pitchz;
5752a110 164 }
b0f5e3fc 165
f1e07e4b 166 return z;*/
b0f5e3fc 167}
5752a110 168//______________________________________________________________________
55d2c544 169Float_t AliITSsegmentationSPD::ZpitchFromCol(Int_t col) const {
f1e07e4b 170 // Get pitch size in z direction for each colunm
b0f5e3fc 171
87663651 172 Float_t pitchz = 425.;
5752a110 173 if(col < 0){
174 pitchz = 0.0;
91378d45 175 } else if(col >= 31 && col <= 32) {
87663651 176 pitchz = 625.;
91378d45 177 } else if(col >= 63 && col <= 64) {
87663651 178 pitchz = 625.;
91378d45 179 } else if(col >= 95 && col <= 96) {
87663651 180 pitchz = 625.;
91378d45 181 } else if(col >= 127 && col <= 128) {
87663651 182 pitchz = 625.;
91378d45 183 } else if(col >= 159 && col <= 160) {
87663651 184 pitchz = 625.;
f1e07e4b 185 } else if(col>=192){
87663651 186 pitchz = 425.;
5752a110 187 }
188 return pitchz;
b0f5e3fc 189}
5752a110 190//______________________________________________________________________
b0f5e3fc 191AliITSsegmentationSPD::AliITSsegmentationSPD(AliITSgeom *gm){
192 // Constructor
193 fCorr=0;
194 fNpx = 0;
195 fNpz = 0;
196 Init();
197 fGeom = gm;
198
199}
5752a110 200//______________________________________________________________________
55d2c544 201void AliITSsegmentationSPD::Copy(TObject &obj) const {
202 // protected method. copy this to obj
203 AliITSsegmentation::Copy(obj);
204 ((AliITSsegmentationSPD& ) obj).fNpx = fNpx;
205 ((AliITSsegmentationSPD& ) obj).fNpz = fNpz;
206 Int_t i;
207 for(i=0;i<256;i++)
208 ((AliITSsegmentationSPD& ) obj).fCellSizeX[i] = fCellSizeX[i];
209 for(i=0;i<280;i++)
210 ((AliITSsegmentationSPD& ) obj).fCellSizeZ[i] = fCellSizeZ[i];
211}
212
213//______________________________________________________________________
214AliITSsegmentationSPD& AliITSsegmentationSPD::operator=(const AliITSsegmentationSPD &source){
b0f5e3fc 215 // = operator
b0f5e3fc 216 if(this==&source) return *this;
55d2c544 217 source.Copy(*this);
b0f5e3fc 218 return *this;
219}
220//____________________________________________________________________________
55d2c544 221AliITSsegmentationSPD::AliITSsegmentationSPD(const AliITSsegmentationSPD &source) :
ac74f489 222 AliITSsegmentation(source){
b0f5e3fc 223 // copy constructor
55d2c544 224 source.Copy(*this);
b0f5e3fc 225}
91378d45 226//----------------------------------------------------------------------
227void AliITSsegmentationSPD::SetBinSize(Float_t *x,Float_t *z){
228 // Fills the array of pixel sizes in x, microns
229 // The input array x must have 256 elements.
230 Int_t i;
231
232 for(i=0;i<256;i++) fCellSizeX[i] = x[i];
7775613f 233 for(i=0;i<280;i++) fCellSizeZ[i] = z[i];
91378d45 234 return;
235}
236//----------------------------------------------------------------------
b0f5e3fc 237void AliITSsegmentationSPD::Init300(){
238// Initialize infromation for 6 read out chip 300X50 micron pixel SPD
239// detectors. This chip is 150 microns thick by 1.28 cm in x by 8.37 cm
240// long. It has 256 50 micron pixels in x and 279 300 micron size
241// pixels in z.
242
b0f5e3fc 243 //const Float_t kconv=10000.;
e8189707 244 Int_t i;
b0f5e3fc 245 fNpx = 256; // The number of X pixel Cell same as in fCellSizeX array size
246 fNpz = 279; // The number of Z pixel Cell same as in fCellSizeZ array size
247 for(i=0;i<fNpx;i++) fCellSizeX[i] = 50.0; // microns all the same
f1e07e4b 248 for(i=0;i<280;i++) fCellSizeZ[i] = ZpitchFromCol300(i); // microns
249// for(i=fNpz;i<280;i++) fCellSizeZ[i] = 0.0; // zero out rest of array
b0f5e3fc 250 fDx = 0;
251 for(i=0;i<fNpx;i++) fDx += fCellSizeX[i];
252 fDz = 0;
253 for(i=0;i<fNpz;i++) fDz += fCellSizeZ[i];
254 fDy = 300.0; //microns SPD sensitive layer thickness
255}
256
257//------------------------------
258void AliITSsegmentationSPD::Init(){
259// Initialize infromation for 6 read out chip 425X50 micron pixel SPD
260// detectors. This chip is 150 microns thick by 1.28 cm in x by 8.375 cm
261// long. It has 256 50 micron pixels in x and 197 mostly 425 micron size
262// pixels in z. The two pixels between each readout chip are 625 microns long.
263
b0f5e3fc 264 //const Float_t kconv=10000.;
e8189707 265 Int_t i;
b0f5e3fc 266 fNpx = 256; // The number of X pixel Cell same as in fCellSizeX array size
267 fNpz = 192; // The number of Z pixel Cell same as in fCellSizeZ array size
268 for(i=0;i<fNpx;i++) fCellSizeX[i] = 50.0; // microns all the same
f1e07e4b 269 for(i=0;i<280;i++) fCellSizeZ[i] = ZpitchFromCol(i); // microns
270// for(i=fNpz;i<280;i++) fCellSizeZ[i] = 0.0; // zero out rest of array
b0f5e3fc 271 fDx = 0;
272 for(i=0;i<fNpx;i++) fDx += fCellSizeX[i];
273 fDz = 0;
274 for(i=0;i<fNpz;i++) fDz += fCellSizeZ[i];
275 fDy = 300.0; //microns SPD sensitive layer thickness
e8189707 276 //printf(" AliITSsegmentationSPD - Init: fNpx fNpz fDx fDz %d %d %f %f\n",fNpx, fNpz, fDx, fDz);
b0f5e3fc 277
278}
279//------------------------------
e8189707 280void AliITSsegmentationSPD::SetNPads(Int_t p1, Int_t p2){
b0f5e3fc 281 // for SPD this function should be used ONLY when a beam test setup
282 // configuration is studied
283
284 fNpx=p1;
285 fNpz=p2;
286
287}
b0f5e3fc 288
b0f5e3fc 289//------------------------------
55d2c544 290Float_t AliITSsegmentationSPD::Dpx(Int_t i) const {
f1e07e4b 291 //returs x pixel pitch for a give pixel
292 if(i<0||i>=256) return 0.0;
293 return fCellSizeX[i];
b0f5e3fc 294}
295//------------------------------
55d2c544 296Float_t AliITSsegmentationSPD::Dpz(Int_t i) const {
f1e07e4b 297 // returns z pixel pitch for a give pixel
298 if(i<0||i>=280) return 0.0;
299 return fCellSizeZ[i];
b0f5e3fc 300}
301//------------------------------
55d2c544 302void AliITSsegmentationSPD::GetPadIxz(Float_t x,Float_t z,Int_t &ix,Int_t &iz) const {
b0f5e3fc 303// Returns pixel coordinates (ix,iz) for given real local coordinates (x,z)
304//
305
306 // expects x, z in microns
307
308 // same segmentation on x
309 Float_t dpx=Dpx(0);
310 ix = (Int_t)(x/dpx + 1);
311 // different segmentation on z
312 iz = (Int_t)(ColFromZ(z) + 1);
313
b0f5e3fc 314
315 if (iz > fNpz) iz= fNpz;
316 if (ix > fNpx) ix= fNpx;
b0f5e3fc 317 /*
318 if (iz < -fNpz) iz= -fNpz;
319 if (ix < -fNpx) ix=-fNpx;
320 */
321}
322
323//------------------------------
55d2c544 324void AliITSsegmentationSPD::GetPadTxz(Float_t &x,Float_t &z) const{
e8189707 325// local transformation of real local coordinates (x,z)
326//
327
328 // expects x, z in microns
329
330 // same segmentation on x
331 Float_t dpx=Dpx(0);
332
333 x /= dpx;
334 z = ColFromZ(z);
335
336}
337//------------------------------
55d2c544 338void AliITSsegmentationSPD::GetPadCxz(Int_t ix,Int_t iz,Float_t &x,Float_t&z) const {
b0f5e3fc 339 // Transform from pixel to real local coordinates
340
341 // returns x, z in microns
342
343 Float_t dpx=Dpx(0);
344
345 x = (ix>0) ? Float_t(ix*dpx)-dpx/2. : Float_t(ix*dpx)+dpx/2.;
346 z = ZFromCol(iz);
347
348
349}
350//------------------------------
351void AliITSsegmentationSPD::
55d2c544 352Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[8], Int_t Zlist[8]) const {
b0f5e3fc 353 // returns the neighbouring pixels for use in Cluster Finders and the like.
354 /*
355 *Nlist=4;Xlist[0]=Xlist[1]=iX;Xlist[2]=iX-1;Xlist[3]=iX+1;
356 Zlist[0]=iZ-1;Zlist[1]=iZ+1;Zlist[2]=Zlist[3]=iZ;
357 */
358
359
360 *Nlist=8;
361 Xlist[0]=Xlist[1]=iX;
362 Xlist[2]=iX-1;
363 Xlist[3]=iX+1;
364 Zlist[0]=iZ-1;
365 Zlist[1]=iZ+1;
366 Zlist[2]=Zlist[3]=iZ;
367
368 // Diagonal elements
369 Xlist[4]=iX+1;
370 Zlist[4]=iZ+1;
371
372 Xlist[5]=iX-1;
373 Zlist[5]=iZ-1;
374
375 Xlist[6]=iX-1;
376 Zlist[6]=iZ+1;
377
378 Xlist[7]=iX+1;
379 Zlist[7]=iZ-1;
380}
5752a110 381//______________________________________________________________________
aacedc3e 382Bool_t AliITSsegmentationSPD::LocalToDet(Float_t x,Float_t z,
383 Int_t &ix,Int_t &iz) const {
384 // Transformation from Geant detector centered local coordinates (cm) to
385 // Pixel cell numbers ix and iz.
386 // Input:
387 // Float_t x detector local coordinate x in cm with respect to
388 // the center of the sensitive volume.
389 // Float_t z detector local coordinate z in cm with respect to
390 // the center of the sensitive volulme.
391 // Output:
392 // Int_t ix detector x cell coordinate. Has the range
393 // 0<=ix<fNpx.
394 // Int_t iz detector z cell coordinate. Has the range
395 // 0<=iz<fNpz.
396 // Return:
397 // kTRUE if point x,z is inside sensitive volume, kFALSE otherwise.
398 // A value of -1 for ix or iz indecates that this point is outside of the
399 // detector segmentation as defined.
5752a110 400 Int_t i,j;
401 Float_t dx,dz;
402 const Float_t kconv = 1.0E-04; // converts microns to cm.
403
404 dx = -0.5*kconv*Dx();
405 dz = -0.5*kconv*Dz();
406 ix = -1;
407 iz = -1;
aacedc3e 408 if(x<dx) return kFALSE; // outside x range.
409 if(z<dz) return kFALSE; // outside z range.
5752a110 410 for(i=0;i<Npx();i++){
411 dx += kconv*fCellSizeX[i];
412 if(x<dx) break;
413 } // end for i
aacedc3e 414 if(i>=Npx()) return kFALSE; // outside x range.
5752a110 415 for(j=0;j<Npz();j++){
416 dz += kconv*fCellSizeZ[j];
417 if(z<dz) break;
418 } // end for j
aacedc3e 419 if(j>=Npz()) return kFALSE; // outside z range.
5752a110 420 ix = i;
421 iz = j;
aacedc3e 422 return kTRUE; // Found ix and iz, return.
5752a110 423}
424//______________________________________________________________________
55d2c544 425void AliITSsegmentationSPD::DetToLocal(Int_t ix,Int_t iz,Float_t &x,Float_t &z) const
5752a110 426{
427// Transformation from Detector cell coordiantes to Geant detector centerd
428// local coordinates (cm).
429// Input:
430// Int_t ix detector x cell coordinate. Has the range 0<=ix<fNpx.
431// Int_t iz detector z cell coordinate. Has the range 0<=iz<fNpz.
432// Output:
433// Float_t x detector local coordinate x in cm with respect to the
434// center of the sensitive volume.
435// Float_t z detector local coordinate z in cm with respect to the
436// center of the sensitive volulme.
437// If ix and or iz is outside of the segmentation range a value of -0.5*Dx()
438// or -0.5*Dz() is returned.
439 Int_t i,j;
440 const Float_t kconv = 1.0E-04; // converts microns to cm.
441
442 x = -0.5*kconv*Dx(); // default value.
443 z = -0.5*kconv*Dz(); // default value.
444 if(ix<0 || ix>=Npx()) return; // outside of detector
445 if(iz<0 || iz>=Npz()) return; // outside of detctor
446 for(i=0;i<ix;i++) x += kconv*fCellSizeX[i]; // sum up to cell ix-1
447 x += 0.5*kconv*fCellSizeX[ix]; // add 1/2 of cell ix for center location.
448 for(j=0;j<iz;j++) z += kconv*fCellSizeZ[j]; // sum up cell iz-1
449 z += 0.5*kconv*fCellSizeZ[iz]; // add 1/2 of cell iz for center location.
450 return; // Found x and z, return.
451}
bd8ff387 452//______________________________________________________________________
453void AliITSsegmentationSPD::CellBoundries(Int_t ix,Int_t iz,
454 Double_t &xl,Double_t &xu,
55d2c544 455 Double_t &zl,Double_t &zu) const
bd8ff387 456{
457// Transformation from Detector cell coordiantes to Geant detector centerd
458// local coordinates (cm).
459// Input:
460// Int_t ix detector x cell coordinate. Has the range 0<=ix<fNpx.
461// Int_t iz detector z cell coordinate. Has the range 0<=iz<fNpz.
462// Output:
463// Double_t xl detector local coordinate cell lower bounds x in cm
464// with respect to the center of the sensitive volume.
465// Double_t xu detector local coordinate cell upper bounds x in cm
466// with respect to the center of the sensitive volume.
467// Double_t zl detector local coordinate lower bounds z in cm with
468// respect to the center of the sensitive volulme.
469// Double_t zu detector local coordinate upper bounds z in cm with
470// respect to the center of the sensitive volulme.
471// If ix and or iz is outside of the segmentation range a value of -0.5*Dx()
472// and -0.5*Dx() or -0.5*Dz() and -0.5*Dz() are returned.
473 Int_t i,j;
474 const Float_t kconv = 1.0E-04; // converts microns to cm.
475 Float_t x,z;
476
477 xl = xu = x = -0.5*kconv*Dx(); // default value.
478 zl = zu = z = -0.5*kconv*Dz(); // default value.
479 if(ix<0 || ix>=Npx()) return; // outside of detector
480 if(iz<0 || iz>=Npz()) return; // outside of detctor
481 for(i=0;i<ix;i++) x += kconv*fCellSizeX[i]; // sum up to cell ix-1
482 xl = x;
483 x += kconv*fCellSizeX[ix];
484 xu = x;
485 for(j=0;j<iz;j++) z += kconv*fCellSizeZ[j]; // sum up cell iz-1
486 zl = z;
487 z += kconv*fCellSizeZ[iz];
488 zu = z;
489 return; // Found x and z, return.
490}