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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 | ||
16 | /* $Id$ */ | |
17 | #include <TGeoManager.h> | |
18 | #include <TGeoVolume.h> | |
19 | #include <TGeoBBox.h> | |
20 | #include "AliITSsegmentationSPD.h" | |
21 | ||
22 | ////////////////////////////////////////////////////// | |
23 | // Segmentation class for // | |
24 | // pixels // | |
25 | // // | |
26 | ////////////////////////////////////////////////////// | |
27 | const Int_t AliITSsegmentationSPD::fgkNchipsPerModule = 5; | |
28 | const Int_t AliITSsegmentationSPD::fgkNcolumnsPerChip = 32; | |
29 | ClassImp(AliITSsegmentationSPD) | |
30 | ||
31 | //_____________________________________________________________________________ | |
32 | AliITSsegmentationSPD::AliITSsegmentationSPD(Option_t *opt): AliITSsegmentation(), | |
33 | fNpx(0), | |
34 | fNpz(0){ | |
35 | // Default constructor | |
36 | ||
37 | // Initialization to default values | |
38 | Init(); | |
39 | ||
40 | // Initialization of detector dimensions from TGeo | |
41 | if(strstr(opt,"TGeo")){ | |
42 | if(!gGeoManager){ | |
43 | AliError("Geometry is not initialized\n Using hardwired default values"); | |
44 | return; | |
45 | } | |
46 | TGeoVolume *v=NULL; | |
47 | v = gGeoManager->GetVolume("ITSSPDlay1-sensor"); | |
48 | if(!v){ | |
49 | AliWarning("TGeo volume ITSSPDlay1-sensor not found (hint: use v11Hybrid geometry)\n Using hardwired default values"); | |
50 | } | |
51 | else { | |
52 | TGeoBBox *s=(TGeoBBox*)v->GetShape(); | |
53 | SetDetSize(s->GetDX()*20000.,s->GetDZ()*20000.,s->GetDY()*20000.); | |
54 | } | |
55 | } | |
56 | } | |
57 | ||
58 | //_____________________________________________________________________________ | |
59 | Float_t AliITSsegmentationSPD::ColFromZ300(Float_t z) const { | |
60 | // Get column number for each z-coordinate taking into account the | |
61 | // extra pixels in z direction assuming 300 micron sized pixels. | |
62 | Float_t col = 0.0; | |
63 | Float_t pitchz = 300.0; | |
64 | col = Float_t (z/pitchz); | |
65 | return col; | |
66 | } | |
67 | //_____________________________________________________________________________ | |
68 | Float_t AliITSsegmentationSPD::ZFromCol300(Int_t col) const { | |
69 | // same comments as above | |
70 | // Get z-coordinate for each colunm number | |
71 | Float_t pitchz = 300.0; | |
72 | Float_t z = 0.0; | |
73 | z = (col+0.5)*pitchz; | |
74 | return z; | |
75 | } | |
76 | //_____________________________________________________________________________ | |
77 | Float_t AliITSsegmentationSPD::ZpitchFromCol300(Int_t col) const { | |
78 | // returns Z pixel pitch for 300 micron pixels. | |
79 | ||
80 | col = 0; // done to remove unused variable warning. | |
81 | return 300.0; | |
82 | } | |
83 | //_____________________________________________________________________________ | |
84 | Float_t AliITSsegmentationSPD::ColFromZ(Float_t z) const { | |
85 | // hard-wired - keep it like this till we can parametrise | |
86 | // and get rid of AliITSgeomSPD425 | |
87 | // Get column number for each z-coordinate taking into account the | |
88 | // extra pixels in z direction | |
89 | Int_t i; | |
90 | Float_t s,col; | |
91 | ||
92 | if(z<0||z>fDz){ | |
93 | AliError(Form("z=%f outside of range 0.0<=z<fDz=%f",z,fDz)); | |
94 | return 0.0; // error | |
95 | } // end if outsize of detector | |
96 | s = 0.0; | |
97 | i = -1; | |
98 | while(z>s){ | |
99 | i++; | |
100 | s += fCellSizeZ[i]; | |
101 | } // end while | |
102 | s -= fCellSizeZ[i]; | |
103 | col = (Float_t) i + (z-s)/fCellSizeZ[i]; | |
104 | return col; | |
105 | ||
106 | /* | |
107 | Float_t col = 0; | |
108 | Float_t pitchz = 425; | |
109 | if( z < 13175) { | |
110 | col = Float_t(z/pitchz); | |
111 | } else if( z < 14425) { | |
112 | pitchz = 625; | |
113 | col = 31 + (z - 13175)/pitchz; | |
114 | } else if( z < 27175) { | |
115 | col = 33 + (z - 14425)/pitchz; | |
116 | } else if( z < 28425) { | |
117 | pitchz = 625; | |
118 | col = 63 + (z - 27175)/pitchz; | |
119 | } else if( z < 41175) { | |
120 | col = 65 + (z - 28425)/pitchz; | |
121 | } else if( z < 42425) { | |
122 | pitchz = 625; | |
123 | col = 95 + (z - 41175)/pitchz; | |
124 | } else if( z < 55175) { | |
125 | col = 97 + (z - 42425)/pitchz; | |
126 | } else if( z < 56425) { | |
127 | pitchz = 625; | |
128 | col = 127 + (z - 55175)/pitchz; | |
129 | } else if( z < 69175) { | |
130 | col = 129 + (z - 56425)/pitchz; | |
131 | } else if( z < 70425) { | |
132 | pitchz = 625; | |
133 | col = 159 + (z - 69175)/pitchz; | |
134 | } else if( z < 83600) { | |
135 | col = 161 + (z - 70425)/pitchz; | |
136 | } | |
137 | return TMath::Abs(col);*/ | |
138 | } | |
139 | ||
140 | //_____________________________________________________________________________ | |
141 | Float_t AliITSsegmentationSPD::ZFromCol(Int_t col) const { | |
142 | // same comments as above | |
143 | // Get z-coordinate for each colunm number | |
144 | Int_t i; | |
145 | Float_t z; | |
146 | ||
147 | if(col<0||col>=fNpz){ | |
148 | AliError(Form("col=%d outside of range 0<=col<fNpZ=%d",col,fNpz)); | |
149 | return 0.0; // error | |
150 | } // end if outsize of detector | |
151 | z = 0.0; | |
152 | for(i=0;i<col;i++) z += fCellSizeZ[i]; | |
153 | z += 0.5*fCellSizeZ[col]; | |
154 | return z; | |
155 | ||
156 | /* | |
157 | Float_t pitchz = 425; | |
158 | Float_t z = 0; | |
159 | if( col >=0 && col <= 30 ) { | |
160 | z = (col + 0.5)*pitchz; | |
161 | } else if( col >= 31 && col <= 32) { | |
162 | pitchz = 625; | |
163 | z = 13175 + (col -31 + 0.5)*pitchz; | |
164 | } else if( col >= 33 && col <= 62) { | |
165 | z = 14425 + (col -33 + 0.5)*pitchz; | |
166 | } else if( col >= 63 && col <= 64) { | |
167 | pitchz = 625; | |
168 | z = 27175 + (col -63 + 0.5)*pitchz; | |
169 | } else if( col >= 65 && col <= 94) { | |
170 | z = 28425 + (col -65 + 0.5)*pitchz; | |
171 | } else if( col >= 95 && col <= 96) { | |
172 | pitchz = 625; | |
173 | z = 41175 + (col -95 + 0.5)*pitchz; | |
174 | } else if( col >= 97 && col <= 126) { | |
175 | z = 42425 + (col -97 + 0.5)*pitchz; | |
176 | } else if( col >= 127 && col <= 128) { | |
177 | pitchz = 625; | |
178 | z = 55175 + (col -127 + 0.5)*pitchz; | |
179 | } else if( col >= 129 && col <= 158) { | |
180 | z = 56425 + (col -129 + 0.5)*pitchz; | |
181 | } else if( col >= 159 && col <= 160) { | |
182 | pitchz = 625; | |
183 | z = 69175 + (col -159 + 0.5)*pitchz; | |
184 | } else if( col >= 161 && col <= 191) { | |
185 | z = 70425 + (col -161 + 0.5)*pitchz; | |
186 | } | |
187 | ||
188 | return z;*/ | |
189 | } | |
190 | //______________________________________________________________________ | |
191 | Float_t AliITSsegmentationSPD::ZpitchFromCol(Int_t col) const { | |
192 | // Get pitch size in z direction for each colunm | |
193 | ||
194 | Float_t pitchz = 425.; | |
195 | if(col < 0){ | |
196 | pitchz = 0.0; | |
197 | } else if(col >= 31 && col <= 32) { | |
198 | pitchz = 625.; | |
199 | } else if(col >= 63 && col <= 64) { | |
200 | pitchz = 625.; | |
201 | } else if(col >= 95 && col <= 96) { | |
202 | pitchz = 625.; | |
203 | } else if(col >= 127 && col <= 128) { | |
204 | pitchz = 625.; | |
205 | } else if(col >= 159 && col <= 160) { | |
206 | pitchz = 625.; | |
207 | } else if(col>=192){ | |
208 | pitchz = 425.; | |
209 | } | |
210 | return pitchz; | |
211 | } | |
212 | ||
213 | //______________________________________________________________________ | |
214 | void AliITSsegmentationSPD::Copy(TObject &obj) const { | |
215 | // protected method. copy this to obj | |
216 | AliITSsegmentation::Copy(obj); | |
217 | ((AliITSsegmentationSPD& ) obj).fNpx = fNpx; | |
218 | ((AliITSsegmentationSPD& ) obj).fNpz = fNpz; | |
219 | Int_t i; | |
220 | for(i=0;i<256;i++) | |
221 | ((AliITSsegmentationSPD& ) obj).fCellSizeX[i] = fCellSizeX[i]; | |
222 | for(i=0;i<280;i++) | |
223 | ((AliITSsegmentationSPD& ) obj).fCellSizeZ[i] = fCellSizeZ[i]; | |
224 | } | |
225 | ||
226 | //______________________________________________________________________ | |
227 | AliITSsegmentationSPD& AliITSsegmentationSPD::operator=(const AliITSsegmentationSPD &source){ | |
228 | // = operator | |
229 | if(this==&source) return *this; | |
230 | source.Copy(*this); | |
231 | return *this; | |
232 | } | |
233 | //____________________________________________________________________________ | |
234 | AliITSsegmentationSPD::AliITSsegmentationSPD(const AliITSsegmentationSPD &source) : | |
235 | AliITSsegmentation(source), | |
236 | fNpx(0), | |
237 | fNpz(0){ | |
238 | // copy constructor | |
239 | source.Copy(*this); | |
240 | } | |
241 | //---------------------------------------------------------------------- | |
242 | void AliITSsegmentationSPD::SetBinSize(Float_t *x,Float_t *z){ | |
243 | // Fills the array of pixel sizes in x, microns | |
244 | // The input array x must have 256 elements. | |
245 | Int_t i; | |
246 | ||
247 | for(i=0;i<256;i++) fCellSizeX[i] = x[i]; | |
248 | for(i=0;i<280;i++) fCellSizeZ[i] = z[i]; | |
249 | return; | |
250 | } | |
251 | //---------------------------------------------------------------------- | |
252 | void AliITSsegmentationSPD::Init300(){ | |
253 | // Initialize infromation for 6 read out chip 300X50 micron pixel SPD | |
254 | // detectors. This chip is 150 microns thick by 1.28 cm in x by 8.37 cm | |
255 | // long. It has 256 50 micron pixels in x and 279 300 micron size | |
256 | // pixels in z. | |
257 | ||
258 | //const Float_t kconv=10000.; | |
259 | Int_t i; | |
260 | fNpx = 256; // The number of X pixel Cell same as in fCellSizeX array size | |
261 | fNpz = 279; // The number of Z pixel Cell same as in fCellSizeZ array size | |
262 | for(i=0;i<fNpx;i++) fCellSizeX[i] = 50.0; // microns all the same | |
263 | for(i=0;i<280;i++) fCellSizeZ[i] = ZpitchFromCol300(i); // microns | |
264 | // for(i=fNpz;i<280;i++) fCellSizeZ[i] = 0.0; // zero out rest of array | |
265 | fDx = 0; | |
266 | for(i=0;i<fNpx;i++) fDx += fCellSizeX[i]; | |
267 | fDz = 0; | |
268 | for(i=0;i<fNpz;i++) fDz += fCellSizeZ[i]; | |
269 | fDy = 300.0; //microns SPD sensitive layer thickness | |
270 | } | |
271 | ||
272 | //------------------------------ | |
273 | void AliITSsegmentationSPD::Init(){ | |
274 | // Initialize information for 5 read out chip 425X50 micron pixel SPD | |
275 | // detectors (ladder). | |
276 | // Each readout chip is 150 micron thick. | |
277 | // The ladder sensor is 200 micron thick by 1.28 cm in x by 6.96 cm in z. | |
278 | // It has 256 50 micron pixels in x and 160 mostly 425 micron pixels in z. | |
279 | // The two pixels at boundary between two adjacent readout chips are | |
280 | // 625 micron long. | |
281 | ||
282 | Float_t bx[256],bz[280]; | |
283 | Int_t i; | |
284 | SetNPads(256,160); // Number of Bins in x and z | |
285 | for(i=000;i<256;i++) bx[i] = 50.0; // in x all are 50 microns. | |
286 | for(i=000;i<160;i++) bz[i] = 425.0; // most are 425 microns except below | |
287 | for(i=160;i<280;i++) bz[i] = 0.0; // Outside of detector. | |
288 | bz[ 31] = bz[ 32] = 625.0; // first chip boundary | |
289 | bz[ 63] = bz[ 64] = 625.0; // first chip boundary | |
290 | bz[ 95] = bz[ 96] = 625.0; // first chip boundary | |
291 | bz[127] = bz[128] = 625.0; // first chip boundary | |
292 | bz[160] = 425.0; // Set so that there is no zero pixel size for fNz. | |
293 | SetBinSize(bx,bz); | |
294 | SetDetSize(12800,69600,200); // full lengths (x,z,y) in microns | |
295 | ||
296 | } | |
297 | //------------------------------ | |
298 | void AliITSsegmentationSPD::SetNPads(Int_t p1, Int_t p2){ | |
299 | // for SPD this function should be used ONLY when a beam test setup | |
300 | // configuration is studied | |
301 | ||
302 | fNpx=p1; | |
303 | fNpz=p2; | |
304 | ||
305 | } | |
306 | ||
307 | //------------------------------ | |
308 | Float_t AliITSsegmentationSPD::Dpx(Int_t i) const { | |
309 | //returs x pixel pitch for a give pixel | |
310 | if(i<0||i>=256) return 0.0; | |
311 | return fCellSizeX[i]; | |
312 | } | |
313 | //------------------------------ | |
314 | Float_t AliITSsegmentationSPD::Dpz(Int_t i) const { | |
315 | // returns z pixel pitch for a give pixel | |
316 | if(i<0||i>=280) return 0.0; | |
317 | return fCellSizeZ[i]; | |
318 | } | |
319 | //------------------------------ | |
320 | void AliITSsegmentationSPD::GetPadIxz(Float_t x,Float_t z,Int_t &ix,Int_t &iz) const { | |
321 | // Returns pixel coordinates (ix,iz) for given real local coordinates (x,z) | |
322 | // | |
323 | ||
324 | // expects x, z in microns | |
325 | ||
326 | // same segmentation on x | |
327 | Float_t dpx=Dpx(0); | |
328 | ix = (Int_t)(x/dpx + 1); | |
329 | // different segmentation on z | |
330 | iz = (Int_t)(ColFromZ(z) + 1); | |
331 | ||
332 | ||
333 | if (iz > fNpz) iz= fNpz; | |
334 | if (ix > fNpx) ix= fNpx; | |
335 | /* | |
336 | if (iz < -fNpz) iz= -fNpz; | |
337 | if (ix < -fNpx) ix=-fNpx; | |
338 | */ | |
339 | } | |
340 | ||
341 | //------------------------------ | |
342 | void AliITSsegmentationSPD::GetPadTxz(Float_t &x,Float_t &z) const{ | |
343 | // local transformation of real local coordinates (x,z) | |
344 | // | |
345 | ||
346 | // expects x, z in microns | |
347 | ||
348 | // same segmentation on x | |
349 | Float_t dpx=Dpx(0); | |
350 | ||
351 | x /= dpx; | |
352 | z = ColFromZ(z); | |
353 | ||
354 | } | |
355 | //------------------------------ | |
356 | void AliITSsegmentationSPD::GetPadCxz(Int_t ix,Int_t iz,Float_t &x,Float_t&z) const { | |
357 | // Transform from pixel to real local coordinates | |
358 | ||
359 | // returns x, z in microns | |
360 | ||
361 | Float_t dpx=Dpx(0); | |
362 | ||
363 | x = (ix>0) ? Float_t(ix*dpx)-dpx/2. : Float_t(ix*dpx)+dpx/2.; | |
364 | z = ZFromCol(iz); | |
365 | ||
366 | ||
367 | } | |
368 | //------------------------------ | |
369 | void AliITSsegmentationSPD:: | |
370 | Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[8], Int_t Zlist[8]) const { | |
371 | // returns the neighbouring pixels for use in Cluster Finders and the like. | |
372 | /* | |
373 | *Nlist=4;Xlist[0]=Xlist[1]=iX;Xlist[2]=iX-1;Xlist[3]=iX+1; | |
374 | Zlist[0]=iZ-1;Zlist[1]=iZ+1;Zlist[2]=Zlist[3]=iZ; | |
375 | */ | |
376 | ||
377 | ||
378 | *Nlist=8; | |
379 | Xlist[0]=Xlist[1]=iX; | |
380 | Xlist[2]=iX-1; | |
381 | Xlist[3]=iX+1; | |
382 | Zlist[0]=iZ-1; | |
383 | Zlist[1]=iZ+1; | |
384 | Zlist[2]=Zlist[3]=iZ; | |
385 | ||
386 | // Diagonal elements | |
387 | Xlist[4]=iX+1; | |
388 | Zlist[4]=iZ+1; | |
389 | ||
390 | Xlist[5]=iX-1; | |
391 | Zlist[5]=iZ-1; | |
392 | ||
393 | Xlist[6]=iX-1; | |
394 | Zlist[6]=iZ+1; | |
395 | ||
396 | Xlist[7]=iX+1; | |
397 | Zlist[7]=iZ-1; | |
398 | } | |
399 | //______________________________________________________________________ | |
400 | Bool_t AliITSsegmentationSPD::LocalToDet(Float_t x,Float_t z, | |
401 | Int_t &ix,Int_t &iz) const { | |
402 | // Transformation from Geant detector centered local coordinates (cm) to | |
403 | // Pixel cell numbers ix and iz. | |
404 | // Input: | |
405 | // Float_t x detector local coordinate x in cm with respect to | |
406 | // the center of the sensitive volume. | |
407 | // Float_t z detector local coordinate z in cm with respect to | |
408 | // the center of the sensitive volulme. | |
409 | // Output: | |
410 | // Int_t ix detector x cell coordinate. Has the range | |
411 | // 0<=ix<fNpx. | |
412 | // Int_t iz detector z cell coordinate. Has the range | |
413 | // 0<=iz<fNpz. | |
414 | // Return: | |
415 | // kTRUE if point x,z is inside sensitive volume, kFALSE otherwise. | |
416 | // A value of -1 for ix or iz indecates that this point is outside of the | |
417 | // detector segmentation as defined. | |
418 | Int_t i,j; | |
419 | Float_t dx,dz; | |
420 | const Float_t kconv = 1.0E-04; // converts microns to cm. | |
421 | ||
422 | dx = -0.5*kconv*Dx(); | |
423 | dz = -0.5*kconv*Dz(); | |
424 | ix = -1; | |
425 | iz = -1; | |
426 | if(x<dx) return kFALSE; // outside x range. | |
427 | if(z<dz) return kFALSE; // outside z range. | |
428 | for(i=0;i<Npx();i++){ | |
429 | dx += kconv*fCellSizeX[i]; | |
430 | if(x<dx) break; | |
431 | } // end for i | |
432 | if(i>=Npx()) return kFALSE; // outside x range. | |
433 | for(j=0;j<Npz();j++){ | |
434 | dz += kconv*fCellSizeZ[j]; | |
435 | if(z<dz) break; | |
436 | } // end for j | |
437 | if(j>=Npz()) return kFALSE; // outside z range. | |
438 | ix = i; | |
439 | iz = j; | |
440 | return kTRUE; // Found ix and iz, return. | |
441 | } | |
442 | //______________________________________________________________________ | |
443 | void AliITSsegmentationSPD::DetToLocal(Int_t ix,Int_t iz,Float_t &x,Float_t &z) const | |
444 | { | |
445 | // Transformation from Detector cell coordiantes to Geant detector centerd | |
446 | // local coordinates (cm). | |
447 | // Input: | |
448 | // Int_t ix detector x cell coordinate. Has the range 0<=ix<fNpx. | |
449 | // Int_t iz detector z cell coordinate. Has the range 0<=iz<fNpz. | |
450 | // Output: | |
451 | // Float_t x detector local coordinate x in cm with respect to the | |
452 | // center of the sensitive volume. | |
453 | // Float_t z detector local coordinate z in cm with respect to the | |
454 | // center of the sensitive volulme. | |
455 | // If ix and or iz is outside of the segmentation range a value of -0.5*Dx() | |
456 | // or -0.5*Dz() is returned. | |
457 | Int_t i,j; | |
458 | const Float_t kconv = 1.0E-04; // converts microns to cm. | |
459 | ||
460 | x = -0.5*kconv*Dx(); // default value. | |
461 | z = -0.5*kconv*Dz(); // default value. | |
462 | if(ix<0 || ix>=Npx()) return; // outside of detector | |
463 | if(iz<0 || iz>=Npz()) return; // outside of detctor | |
464 | for(i=0;i<ix;i++) x += kconv*fCellSizeX[i]; // sum up to cell ix-1 | |
465 | x += 0.5*kconv*fCellSizeX[ix]; // add 1/2 of cell ix for center location. | |
466 | for(j=0;j<iz;j++) z += kconv*fCellSizeZ[j]; // sum up cell iz-1 | |
467 | z += 0.5*kconv*fCellSizeZ[iz]; // add 1/2 of cell iz for center location. | |
468 | return; // Found x and z, return. | |
469 | } | |
470 | //______________________________________________________________________ | |
471 | void AliITSsegmentationSPD::CellBoundries(Int_t ix,Int_t iz, | |
472 | Double_t &xl,Double_t &xu, | |
473 | Double_t &zl,Double_t &zu) const | |
474 | { | |
475 | // Transformation from Detector cell coordiantes to Geant detector centerd | |
476 | // local coordinates (cm). | |
477 | // Input: | |
478 | // Int_t ix detector x cell coordinate. Has the range 0<=ix<fNpx. | |
479 | // Int_t iz detector z cell coordinate. Has the range 0<=iz<fNpz. | |
480 | // Output: | |
481 | // Double_t xl detector local coordinate cell lower bounds x in cm | |
482 | // with respect to the center of the sensitive volume. | |
483 | // Double_t xu detector local coordinate cell upper bounds x in cm | |
484 | // with respect to the center of the sensitive volume. | |
485 | // Double_t zl detector local coordinate lower bounds z in cm with | |
486 | // respect to the center of the sensitive volulme. | |
487 | // Double_t zu detector local coordinate upper bounds z in cm with | |
488 | // respect to the center of the sensitive volulme. | |
489 | // If ix and or iz is outside of the segmentation range a value of -0.5*Dx() | |
490 | // and -0.5*Dx() or -0.5*Dz() and -0.5*Dz() are returned. | |
491 | Int_t i,j; | |
492 | const Float_t kconv = 1.0E-04; // converts microns to cm. | |
493 | Float_t x,z; | |
494 | ||
495 | xl = xu = x = -0.5*kconv*Dx(); // default value. | |
496 | zl = zu = z = -0.5*kconv*Dz(); // default value. | |
497 | if(ix<0 || ix>=Npx()) return; // outside of detector | |
498 | if(iz<0 || iz>=Npz()) return; // outside of detctor | |
499 | for(i=0;i<ix;i++) x += kconv*fCellSizeX[i]; // sum up to cell ix-1 | |
500 | xl = x; | |
501 | x += kconv*fCellSizeX[ix]; | |
502 | xu = x; | |
503 | for(j=0;j<iz;j++) z += kconv*fCellSizeZ[j]; // sum up cell iz-1 | |
504 | zl = z; | |
505 | z += kconv*fCellSizeZ[iz]; | |
506 | zu = z; | |
507 | return; // Found x and z, return. | |
508 | } | |
509 | //---------------------------------------------------------------------- | |
510 | Int_t AliITSsegmentationSPD::GetChipFromChannel(Int_t, Int_t iz) const { | |
511 | // returns chip number (in range 0-4) starting from channel number | |
512 | if(iz>=fNpz || iz<0 ){ | |
513 | AliWarning("Bad cell number"); | |
514 | return -1; | |
515 | } | |
516 | Int_t theChip=iz/fgkNcolumnsPerChip; | |
517 | return theChip; | |
518 | } | |
519 | //---------------------------------------------------------------------- | |
520 | Int_t AliITSsegmentationSPD::GetChipFromLocal(Float_t, Float_t zloc) const { | |
521 | // returns chip number (in range 0-4) starting from local coordinates | |
522 | Int_t ix0,iz; | |
523 | if (!LocalToDet(0,zloc,ix0,iz)) { | |
524 | AliWarning("Bad local coordinate"); | |
525 | return -1; | |
526 | } | |
527 | return GetChipFromChannel(ix0,iz); | |
528 | } | |
529 | //---------------------------------------------------------------------- | |
530 | Int_t AliITSsegmentationSPD::GetChipsInLocalWindow(Int_t* array, Float_t zmin, Float_t zmax, Float_t, Float_t) const { | |
531 | // returns the number of chips containing a road defined by given local coordinate limits | |
532 | ||
533 | const Float_t kconv = 1.0E-04; // converts microns to cm. | |
534 | ||
535 | if (zmin>zmax) { | |
536 | AliWarning("Bad coordinate limits: zmin>zmax!"); | |
537 | return -1; | |
538 | } | |
539 | ||
540 | Int_t nChipInW = 0; | |
541 | ||
542 | Float_t zminDet = -0.5*kconv*Dz(); | |
543 | Float_t zmaxDet = 0.5*kconv*Dz(); | |
544 | if(zmin<zminDet) zmin=zminDet; | |
545 | if(zmax>zmaxDet) zmax=zmaxDet; | |
546 | ||
547 | Int_t n1 = GetChipFromLocal(0,zmin); | |
548 | array[nChipInW] = n1; | |
549 | nChipInW++; | |
550 | ||
551 | Int_t n2 = GetChipFromLocal(0,zmax); | |
552 | ||
553 | if(n2!=n1){ | |
554 | Int_t imin=TMath::Min(n1,n2); | |
555 | Int_t imax=TMath::Max(n1,n2); | |
556 | for(Int_t ichip=imin; ichip<=imax; ichip++){ | |
557 | if(ichip==n1) continue; | |
558 | array[nChipInW]=ichip; | |
559 | nChipInW++; | |
560 | } | |
561 | } | |
562 | ||
563 | return nChipInW; | |
564 | } | |
565 | //---------------------------------------------------------------------- |