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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 | ||
2b6642a2 | 16 | /* $Id$ */ |
c9649d1e | 17 | #include <TGeoManager.h> |
18 | #include <TGeoVolume.h> | |
19 | #include <TGeoBBox.h> | |
b0f5e3fc | 20 | #include "AliITSsegmentationSPD.h" |
fa4f0f62 | 21 | |
55d2c544 | 22 | ////////////////////////////////////////////////////// |
23 | // Segmentation class for // | |
24 | // pixels // | |
25 | // // | |
26 | ////////////////////////////////////////////////////// | |
2b6642a2 | 27 | const Int_t AliITSsegmentationSPD::fgkNchipsPerModule = 5; |
28 | const Int_t AliITSsegmentationSPD::fgkNcolumnsPerChip = 32; | |
b0f5e3fc | 29 | ClassImp(AliITSsegmentationSPD) |
30 | ||
55d2c544 | 31 | //_____________________________________________________________________________ |
c9649d1e | 32 | AliITSsegmentationSPD::AliITSsegmentationSPD(Option_t *opt): AliITSsegmentation(), |
e56160b8 | 33 | fNpx(0), |
34 | fNpz(0){ | |
55d2c544 | 35 | // Default constructor |
c9649d1e | 36 | |
a5e51e90 | 37 | // Initialization to default values |
38 | Init(); | |
39 | ||
40 | // Initialization of detector dimensions from TGeo | |
c9649d1e | 41 | if(strstr(opt,"TGeo")){ |
42 | if(!gGeoManager){ | |
a5e51e90 | 43 | AliError("Geometry is not initialized\n Using hardwired default values"); |
c9649d1e | 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"); | |
c9649d1e | 50 | } |
51 | else { | |
52 | TGeoBBox *s=(TGeoBBox*)v->GetShape(); | |
53 | SetDetSize(s->GetDX()*20000.,s->GetDZ()*20000.,s->GetDY()*20000.); | |
54 | } | |
c9649d1e | 55 | } |
55d2c544 | 56 | } |
b0f5e3fc | 57 | |
55d2c544 | 58 | //_____________________________________________________________________________ |
59 | Float_t AliITSsegmentationSPD::ColFromZ300(Float_t z) const { | |
b0f5e3fc | 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 | //_____________________________________________________________________________ | |
55d2c544 | 68 | Float_t AliITSsegmentationSPD::ZFromCol300(Int_t col) const { |
b0f5e3fc | 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 | //_____________________________________________________________________________ | |
d43bb62f | 77 | Float_t AliITSsegmentationSPD::Zpitch300() const { |
b0f5e3fc | 78 | // returns Z pixel pitch for 300 micron pixels. |
ac74f489 | 79 | |
ac74f489 | 80 | return 300.0; |
b0f5e3fc | 81 | } |
82 | //_____________________________________________________________________________ | |
55d2c544 | 83 | Float_t AliITSsegmentationSPD::ColFromZ(Float_t z) const { |
f1e07e4b | 84 | // hard-wired - keep it like this till we can parametrise |
85 | // and get rid of AliITSgeomSPD425 | |
86 | // Get column number for each z-coordinate taking into account the | |
87 | // extra pixels in z direction | |
88 | Int_t i; | |
89 | Float_t s,col; | |
5d3918d6 | 90 | |
f1e07e4b | 91 | if(z<0||z>fDz){ |
f6b6d58e | 92 | AliError(Form("z=%f outside of range 0.0<=z<fDz=%f",z,fDz)); |
f1e07e4b | 93 | return 0.0; // error |
94 | } // end if outsize of detector | |
95 | s = 0.0; | |
96 | i = -1; | |
e917bef4 | 97 | do { |
98 | i++; | |
99 | s += fCellSizeZ[i]; | |
100 | } while(z>s); | |
f1e07e4b | 101 | s -= fCellSizeZ[i]; |
102 | col = (Float_t) i + (z-s)/fCellSizeZ[i]; | |
103 | return col; | |
104 | ||
105 | /* | |
b0f5e3fc | 106 | Float_t col = 0; |
107 | Float_t pitchz = 425; | |
108 | if( z < 13175) { | |
109 | col = Float_t(z/pitchz); | |
110 | } else if( z < 14425) { | |
111 | pitchz = 625; | |
112 | col = 31 + (z - 13175)/pitchz; | |
113 | } else if( z < 27175) { | |
114 | col = 33 + (z - 14425)/pitchz; | |
115 | } else if( z < 28425) { | |
116 | pitchz = 625; | |
117 | col = 63 + (z - 27175)/pitchz; | |
118 | } else if( z < 41175) { | |
119 | col = 65 + (z - 28425)/pitchz; | |
120 | } else if( z < 42425) { | |
121 | pitchz = 625; | |
122 | col = 95 + (z - 41175)/pitchz; | |
123 | } else if( z < 55175) { | |
124 | col = 97 + (z - 42425)/pitchz; | |
125 | } else if( z < 56425) { | |
126 | pitchz = 625; | |
127 | col = 127 + (z - 55175)/pitchz; | |
128 | } else if( z < 69175) { | |
129 | col = 129 + (z - 56425)/pitchz; | |
130 | } else if( z < 70425) { | |
131 | pitchz = 625; | |
132 | col = 159 + (z - 69175)/pitchz; | |
133 | } else if( z < 83600) { | |
134 | col = 161 + (z - 70425)/pitchz; | |
135 | } | |
f1e07e4b | 136 | return TMath::Abs(col);*/ |
b0f5e3fc | 137 | } |
138 | ||
139 | //_____________________________________________________________________________ | |
55d2c544 | 140 | Float_t AliITSsegmentationSPD::ZFromCol(Int_t col) const { |
f1e07e4b | 141 | // same comments as above |
142 | // Get z-coordinate for each colunm number | |
143 | Int_t i; | |
144 | Float_t z; | |
5d3918d6 | 145 | |
f1e07e4b | 146 | if(col<0||col>=fNpz){ |
f6b6d58e | 147 | AliError(Form("col=%d outside of range 0<=col<fNpZ=%d",col,fNpz)); |
f1e07e4b | 148 | return 0.0; // error |
149 | } // end if outsize of detector | |
150 | z = 0.0; | |
151 | for(i=0;i<col;i++) z += fCellSizeZ[i]; | |
152 | z += 0.5*fCellSizeZ[col]; | |
153 | return z; | |
154 | ||
155 | /* | |
b0f5e3fc | 156 | Float_t pitchz = 425; |
157 | Float_t z = 0; | |
158 | if( col >=0 && col <= 30 ) { | |
159 | z = (col + 0.5)*pitchz; | |
160 | } else if( col >= 31 && col <= 32) { | |
161 | pitchz = 625; | |
162 | z = 13175 + (col -31 + 0.5)*pitchz; | |
163 | } else if( col >= 33 && col <= 62) { | |
164 | z = 14425 + (col -33 + 0.5)*pitchz; | |
165 | } else if( col >= 63 && col <= 64) { | |
166 | pitchz = 625; | |
167 | z = 27175 + (col -63 + 0.5)*pitchz; | |
168 | } else if( col >= 65 && col <= 94) { | |
169 | z = 28425 + (col -65 + 0.5)*pitchz; | |
170 | } else if( col >= 95 && col <= 96) { | |
171 | pitchz = 625; | |
172 | z = 41175 + (col -95 + 0.5)*pitchz; | |
173 | } else if( col >= 97 && col <= 126) { | |
174 | z = 42425 + (col -97 + 0.5)*pitchz; | |
175 | } else if( col >= 127 && col <= 128) { | |
176 | pitchz = 625; | |
177 | z = 55175 + (col -127 + 0.5)*pitchz; | |
178 | } else if( col >= 129 && col <= 158) { | |
179 | z = 56425 + (col -129 + 0.5)*pitchz; | |
180 | } else if( col >= 159 && col <= 160) { | |
181 | pitchz = 625; | |
182 | z = 69175 + (col -159 + 0.5)*pitchz; | |
183 | } else if( col >= 161 && col <= 191) { | |
184 | z = 70425 + (col -161 + 0.5)*pitchz; | |
5752a110 | 185 | } |
b0f5e3fc | 186 | |
f1e07e4b | 187 | return z;*/ |
b0f5e3fc | 188 | } |
5752a110 | 189 | //______________________________________________________________________ |
55d2c544 | 190 | Float_t AliITSsegmentationSPD::ZpitchFromCol(Int_t col) const { |
f1e07e4b | 191 | // Get pitch size in z direction for each colunm |
b0f5e3fc | 192 | |
87663651 | 193 | Float_t pitchz = 425.; |
5752a110 | 194 | if(col < 0){ |
195 | pitchz = 0.0; | |
91378d45 | 196 | } else if(col >= 31 && col <= 32) { |
87663651 | 197 | pitchz = 625.; |
91378d45 | 198 | } else if(col >= 63 && col <= 64) { |
87663651 | 199 | pitchz = 625.; |
91378d45 | 200 | } else if(col >= 95 && col <= 96) { |
87663651 | 201 | pitchz = 625.; |
91378d45 | 202 | } else if(col >= 127 && col <= 128) { |
87663651 | 203 | pitchz = 625.; |
91378d45 | 204 | } else if(col >= 159 && col <= 160) { |
87663651 | 205 | pitchz = 625.; |
f1e07e4b | 206 | } else if(col>=192){ |
87663651 | 207 | pitchz = 425.; |
5752a110 | 208 | } |
209 | return pitchz; | |
b0f5e3fc | 210 | } |
a5e51e90 | 211 | |
5752a110 | 212 | //______________________________________________________________________ |
55d2c544 | 213 | void AliITSsegmentationSPD::Copy(TObject &obj) const { |
214 | // protected method. copy this to obj | |
215 | AliITSsegmentation::Copy(obj); | |
216 | ((AliITSsegmentationSPD& ) obj).fNpx = fNpx; | |
217 | ((AliITSsegmentationSPD& ) obj).fNpz = fNpz; | |
218 | Int_t i; | |
219 | for(i=0;i<256;i++) | |
220 | ((AliITSsegmentationSPD& ) obj).fCellSizeX[i] = fCellSizeX[i]; | |
221 | for(i=0;i<280;i++) | |
222 | ((AliITSsegmentationSPD& ) obj).fCellSizeZ[i] = fCellSizeZ[i]; | |
223 | } | |
224 | ||
225 | //______________________________________________________________________ | |
226 | AliITSsegmentationSPD& AliITSsegmentationSPD::operator=(const AliITSsegmentationSPD &source){ | |
b0f5e3fc | 227 | // = operator |
b0f5e3fc | 228 | if(this==&source) return *this; |
55d2c544 | 229 | source.Copy(*this); |
b0f5e3fc | 230 | return *this; |
231 | } | |
232 | //____________________________________________________________________________ | |
55d2c544 | 233 | AliITSsegmentationSPD::AliITSsegmentationSPD(const AliITSsegmentationSPD &source) : |
e56160b8 | 234 | AliITSsegmentation(source), |
235 | fNpx(0), | |
236 | fNpz(0){ | |
d43bb62f | 237 | for(Int_t i=0; i<256; i++)fCellSizeX[i]=0.; |
238 | for(Int_t i=0; i<280; i++)fCellSizeZ[i]=0.; | |
b0f5e3fc | 239 | // copy constructor |
55d2c544 | 240 | source.Copy(*this); |
b0f5e3fc | 241 | } |
91378d45 | 242 | //---------------------------------------------------------------------- |
243 | void AliITSsegmentationSPD::SetBinSize(Float_t *x,Float_t *z){ | |
244 | // Fills the array of pixel sizes in x, microns | |
245 | // The input array x must have 256 elements. | |
246 | Int_t i; | |
247 | ||
248 | for(i=0;i<256;i++) fCellSizeX[i] = x[i]; | |
7775613f | 249 | for(i=0;i<280;i++) fCellSizeZ[i] = z[i]; |
91378d45 | 250 | return; |
251 | } | |
252 | //---------------------------------------------------------------------- | |
b0f5e3fc | 253 | void AliITSsegmentationSPD::Init300(){ |
254 | // Initialize infromation for 6 read out chip 300X50 micron pixel SPD | |
255 | // detectors. This chip is 150 microns thick by 1.28 cm in x by 8.37 cm | |
256 | // long. It has 256 50 micron pixels in x and 279 300 micron size | |
257 | // pixels in z. | |
258 | ||
b0f5e3fc | 259 | //const Float_t kconv=10000.; |
e8189707 | 260 | Int_t i; |
b0f5e3fc | 261 | fNpx = 256; // The number of X pixel Cell same as in fCellSizeX array size |
262 | fNpz = 279; // The number of Z pixel Cell same as in fCellSizeZ array size | |
263 | for(i=0;i<fNpx;i++) fCellSizeX[i] = 50.0; // microns all the same | |
d43bb62f | 264 | for(i=0;i<280;i++) fCellSizeZ[i] = Zpitch300(); // microns |
f1e07e4b | 265 | // for(i=fNpz;i<280;i++) fCellSizeZ[i] = 0.0; // zero out rest of array |
b0f5e3fc | 266 | fDx = 0; |
267 | for(i=0;i<fNpx;i++) fDx += fCellSizeX[i]; | |
268 | fDz = 0; | |
269 | for(i=0;i<fNpz;i++) fDz += fCellSizeZ[i]; | |
270 | fDy = 300.0; //microns SPD sensitive layer thickness | |
271 | } | |
272 | ||
273 | //------------------------------ | |
274 | void AliITSsegmentationSPD::Init(){ | |
2b6642a2 | 275 | // Initialize information for 5 read out chip 425X50 micron pixel SPD |
276 | // detectors (ladder). | |
277 | // Each readout chip is 150 micron thick. | |
278 | // The ladder sensor is 200 micron thick by 1.28 cm in x by 6.96 cm in z. | |
279 | // It has 256 50 micron pixels in x and 160 mostly 425 micron pixels in z. | |
280 | // The two pixels at boundary between two adjacent readout chips are | |
281 | // 625 micron long. | |
b0f5e3fc | 282 | |
a5e51e90 | 283 | Float_t bx[256],bz[280]; |
284 | Int_t i; | |
285 | SetNPads(256,160); // Number of Bins in x and z | |
286 | for(i=000;i<256;i++) bx[i] = 50.0; // in x all are 50 microns. | |
287 | for(i=000;i<160;i++) bz[i] = 425.0; // most are 425 microns except below | |
288 | for(i=160;i<280;i++) bz[i] = 0.0; // Outside of detector. | |
289 | bz[ 31] = bz[ 32] = 625.0; // first chip boundary | |
290 | bz[ 63] = bz[ 64] = 625.0; // first chip boundary | |
291 | bz[ 95] = bz[ 96] = 625.0; // first chip boundary | |
292 | bz[127] = bz[128] = 625.0; // first chip boundary | |
293 | bz[160] = 425.0; // Set so that there is no zero pixel size for fNz. | |
294 | SetBinSize(bx,bz); | |
295 | SetDetSize(12800,69600,200); // full lengths (x,z,y) in microns | |
b0f5e3fc | 296 | |
297 | } | |
298 | //------------------------------ | |
e8189707 | 299 | void AliITSsegmentationSPD::SetNPads(Int_t p1, Int_t p2){ |
b0f5e3fc | 300 | // for SPD this function should be used ONLY when a beam test setup |
301 | // configuration is studied | |
302 | ||
303 | fNpx=p1; | |
304 | fNpz=p2; | |
305 | ||
306 | } | |
b0f5e3fc | 307 | |
b0f5e3fc | 308 | //------------------------------ |
55d2c544 | 309 | Float_t AliITSsegmentationSPD::Dpx(Int_t i) const { |
f1e07e4b | 310 | //returs x pixel pitch for a give pixel |
311 | if(i<0||i>=256) return 0.0; | |
312 | return fCellSizeX[i]; | |
b0f5e3fc | 313 | } |
314 | //------------------------------ | |
55d2c544 | 315 | Float_t AliITSsegmentationSPD::Dpz(Int_t i) const { |
f1e07e4b | 316 | // returns z pixel pitch for a give pixel |
317 | if(i<0||i>=280) return 0.0; | |
318 | return fCellSizeZ[i]; | |
b0f5e3fc | 319 | } |
320 | //------------------------------ | |
55d2c544 | 321 | void AliITSsegmentationSPD::GetPadIxz(Float_t x,Float_t z,Int_t &ix,Int_t &iz) const { |
b0f5e3fc | 322 | // Returns pixel coordinates (ix,iz) for given real local coordinates (x,z) |
323 | // | |
324 | ||
325 | // expects x, z in microns | |
326 | ||
327 | // same segmentation on x | |
328 | Float_t dpx=Dpx(0); | |
329 | ix = (Int_t)(x/dpx + 1); | |
330 | // different segmentation on z | |
331 | iz = (Int_t)(ColFromZ(z) + 1); | |
332 | ||
b0f5e3fc | 333 | |
334 | if (iz > fNpz) iz= fNpz; | |
335 | if (ix > fNpx) ix= fNpx; | |
b0f5e3fc | 336 | /* |
337 | if (iz < -fNpz) iz= -fNpz; | |
338 | if (ix < -fNpx) ix=-fNpx; | |
339 | */ | |
340 | } | |
341 | ||
342 | //------------------------------ | |
55d2c544 | 343 | void AliITSsegmentationSPD::GetPadTxz(Float_t &x,Float_t &z) const{ |
e8189707 | 344 | // local transformation of real local coordinates (x,z) |
345 | // | |
346 | ||
347 | // expects x, z in microns | |
348 | ||
349 | // same segmentation on x | |
350 | Float_t dpx=Dpx(0); | |
351 | ||
352 | x /= dpx; | |
353 | z = ColFromZ(z); | |
354 | ||
355 | } | |
356 | //------------------------------ | |
55d2c544 | 357 | void AliITSsegmentationSPD::GetPadCxz(Int_t ix,Int_t iz,Float_t &x,Float_t&z) const { |
b0f5e3fc | 358 | // Transform from pixel to real local coordinates |
359 | ||
360 | // returns x, z in microns | |
361 | ||
362 | Float_t dpx=Dpx(0); | |
363 | ||
364 | x = (ix>0) ? Float_t(ix*dpx)-dpx/2. : Float_t(ix*dpx)+dpx/2.; | |
365 | z = ZFromCol(iz); | |
366 | ||
367 | ||
368 | } | |
369 | //------------------------------ | |
370 | void AliITSsegmentationSPD:: | |
55d2c544 | 371 | Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[8], Int_t Zlist[8]) const { |
b0f5e3fc | 372 | // returns the neighbouring pixels for use in Cluster Finders and the like. |
373 | /* | |
374 | *Nlist=4;Xlist[0]=Xlist[1]=iX;Xlist[2]=iX-1;Xlist[3]=iX+1; | |
375 | Zlist[0]=iZ-1;Zlist[1]=iZ+1;Zlist[2]=Zlist[3]=iZ; | |
376 | */ | |
377 | ||
378 | ||
379 | *Nlist=8; | |
380 | Xlist[0]=Xlist[1]=iX; | |
381 | Xlist[2]=iX-1; | |
382 | Xlist[3]=iX+1; | |
383 | Zlist[0]=iZ-1; | |
384 | Zlist[1]=iZ+1; | |
385 | Zlist[2]=Zlist[3]=iZ; | |
386 | ||
387 | // Diagonal elements | |
388 | Xlist[4]=iX+1; | |
389 | Zlist[4]=iZ+1; | |
390 | ||
391 | Xlist[5]=iX-1; | |
392 | Zlist[5]=iZ-1; | |
393 | ||
394 | Xlist[6]=iX-1; | |
395 | Zlist[6]=iZ+1; | |
396 | ||
397 | Xlist[7]=iX+1; | |
398 | Zlist[7]=iZ-1; | |
399 | } | |
5752a110 | 400 | //______________________________________________________________________ |
aacedc3e | 401 | Bool_t AliITSsegmentationSPD::LocalToDet(Float_t x,Float_t z, |
402 | Int_t &ix,Int_t &iz) const { | |
403 | // Transformation from Geant detector centered local coordinates (cm) to | |
404 | // Pixel cell numbers ix and iz. | |
405 | // Input: | |
406 | // Float_t x detector local coordinate x in cm with respect to | |
407 | // the center of the sensitive volume. | |
408 | // Float_t z detector local coordinate z in cm with respect to | |
409 | // the center of the sensitive volulme. | |
410 | // Output: | |
411 | // Int_t ix detector x cell coordinate. Has the range | |
412 | // 0<=ix<fNpx. | |
413 | // Int_t iz detector z cell coordinate. Has the range | |
414 | // 0<=iz<fNpz. | |
415 | // Return: | |
416 | // kTRUE if point x,z is inside sensitive volume, kFALSE otherwise. | |
417 | // A value of -1 for ix or iz indecates that this point is outside of the | |
418 | // detector segmentation as defined. | |
5752a110 | 419 | Int_t i,j; |
420 | Float_t dx,dz; | |
421 | const Float_t kconv = 1.0E-04; // converts microns to cm. | |
422 | ||
423 | dx = -0.5*kconv*Dx(); | |
424 | dz = -0.5*kconv*Dz(); | |
425 | ix = -1; | |
426 | iz = -1; | |
aacedc3e | 427 | if(x<dx) return kFALSE; // outside x range. |
428 | if(z<dz) return kFALSE; // outside z range. | |
5752a110 | 429 | for(i=0;i<Npx();i++){ |
430 | dx += kconv*fCellSizeX[i]; | |
431 | if(x<dx) break; | |
432 | } // end for i | |
aacedc3e | 433 | if(i>=Npx()) return kFALSE; // outside x range. |
5752a110 | 434 | for(j=0;j<Npz();j++){ |
435 | dz += kconv*fCellSizeZ[j]; | |
436 | if(z<dz) break; | |
437 | } // end for j | |
aacedc3e | 438 | if(j>=Npz()) return kFALSE; // outside z range. |
5752a110 | 439 | ix = i; |
440 | iz = j; | |
aacedc3e | 441 | return kTRUE; // Found ix and iz, return. |
5752a110 | 442 | } |
443 | //______________________________________________________________________ | |
55d2c544 | 444 | void AliITSsegmentationSPD::DetToLocal(Int_t ix,Int_t iz,Float_t &x,Float_t &z) const |
5752a110 | 445 | { |
446 | // Transformation from Detector cell coordiantes to Geant detector centerd | |
447 | // local coordinates (cm). | |
448 | // Input: | |
449 | // Int_t ix detector x cell coordinate. Has the range 0<=ix<fNpx. | |
450 | // Int_t iz detector z cell coordinate. Has the range 0<=iz<fNpz. | |
451 | // Output: | |
452 | // Float_t x detector local coordinate x in cm with respect to the | |
453 | // center of the sensitive volume. | |
454 | // Float_t z detector local coordinate z in cm with respect to the | |
455 | // center of the sensitive volulme. | |
456 | // If ix and or iz is outside of the segmentation range a value of -0.5*Dx() | |
457 | // or -0.5*Dz() is returned. | |
458 | Int_t i,j; | |
459 | const Float_t kconv = 1.0E-04; // converts microns to cm. | |
460 | ||
461 | x = -0.5*kconv*Dx(); // default value. | |
462 | z = -0.5*kconv*Dz(); // default value. | |
463 | if(ix<0 || ix>=Npx()) return; // outside of detector | |
464 | if(iz<0 || iz>=Npz()) return; // outside of detctor | |
465 | for(i=0;i<ix;i++) x += kconv*fCellSizeX[i]; // sum up to cell ix-1 | |
466 | x += 0.5*kconv*fCellSizeX[ix]; // add 1/2 of cell ix for center location. | |
467 | for(j=0;j<iz;j++) z += kconv*fCellSizeZ[j]; // sum up cell iz-1 | |
468 | z += 0.5*kconv*fCellSizeZ[iz]; // add 1/2 of cell iz for center location. | |
469 | return; // Found x and z, return. | |
470 | } | |
bd8ff387 | 471 | //______________________________________________________________________ |
472 | void AliITSsegmentationSPD::CellBoundries(Int_t ix,Int_t iz, | |
473 | Double_t &xl,Double_t &xu, | |
55d2c544 | 474 | Double_t &zl,Double_t &zu) const |
bd8ff387 | 475 | { |
476 | // Transformation from Detector cell coordiantes to Geant detector centerd | |
477 | // local coordinates (cm). | |
478 | // Input: | |
479 | // Int_t ix detector x cell coordinate. Has the range 0<=ix<fNpx. | |
480 | // Int_t iz detector z cell coordinate. Has the range 0<=iz<fNpz. | |
481 | // Output: | |
482 | // Double_t xl detector local coordinate cell lower bounds x in cm | |
483 | // with respect to the center of the sensitive volume. | |
484 | // Double_t xu detector local coordinate cell upper bounds x in cm | |
485 | // with respect to the center of the sensitive volume. | |
486 | // Double_t zl detector local coordinate lower bounds z in cm with | |
487 | // respect to the center of the sensitive volulme. | |
488 | // Double_t zu detector local coordinate upper bounds z in cm with | |
489 | // respect to the center of the sensitive volulme. | |
490 | // If ix and or iz is outside of the segmentation range a value of -0.5*Dx() | |
491 | // and -0.5*Dx() or -0.5*Dz() and -0.5*Dz() are returned. | |
492 | Int_t i,j; | |
493 | const Float_t kconv = 1.0E-04; // converts microns to cm. | |
494 | Float_t x,z; | |
495 | ||
496 | xl = xu = x = -0.5*kconv*Dx(); // default value. | |
497 | zl = zu = z = -0.5*kconv*Dz(); // default value. | |
498 | if(ix<0 || ix>=Npx()) return; // outside of detector | |
499 | if(iz<0 || iz>=Npz()) return; // outside of detctor | |
500 | for(i=0;i<ix;i++) x += kconv*fCellSizeX[i]; // sum up to cell ix-1 | |
501 | xl = x; | |
502 | x += kconv*fCellSizeX[ix]; | |
503 | xu = x; | |
504 | for(j=0;j<iz;j++) z += kconv*fCellSizeZ[j]; // sum up cell iz-1 | |
505 | zl = z; | |
506 | z += kconv*fCellSizeZ[iz]; | |
507 | zu = z; | |
508 | return; // Found x and z, return. | |
509 | } | |
2b6642a2 | 510 | //---------------------------------------------------------------------- |
511 | Int_t AliITSsegmentationSPD::GetChipFromChannel(Int_t, Int_t iz) const { | |
512 | // returns chip number (in range 0-4) starting from channel number | |
513 | if(iz>=fNpz || iz<0 ){ | |
514 | AliWarning("Bad cell number"); | |
515 | return -1; | |
516 | } | |
517 | Int_t theChip=iz/fgkNcolumnsPerChip; | |
518 | return theChip; | |
519 | } | |
520 | //---------------------------------------------------------------------- | |
521 | Int_t AliITSsegmentationSPD::GetChipFromLocal(Float_t, Float_t zloc) const { | |
522 | // returns chip number (in range 0-4) starting from local coordinates | |
523 | Int_t ix0,iz; | |
524 | if (!LocalToDet(0,zloc,ix0,iz)) { | |
525 | AliWarning("Bad local coordinate"); | |
526 | return -1; | |
527 | } | |
528 | return GetChipFromChannel(ix0,iz); | |
529 | } | |
530 | //---------------------------------------------------------------------- | |
23197852 | 531 | Int_t AliITSsegmentationSPD::GetChipsInLocalWindow(Int_t* array, Float_t zmin, Float_t zmax, Float_t, Float_t) const { |
532 | // returns the number of chips containing a road defined by given local coordinate limits | |
533 | ||
534 | const Float_t kconv = 1.0E-04; // converts microns to cm. | |
535 | ||
536 | if (zmin>zmax) { | |
537 | AliWarning("Bad coordinate limits: zmin>zmax!"); | |
538 | return -1; | |
539 | } | |
540 | ||
541 | Int_t nChipInW = 0; | |
542 | ||
543 | Float_t zminDet = -0.5*kconv*Dz(); | |
544 | Float_t zmaxDet = 0.5*kconv*Dz(); | |
545 | if(zmin<zminDet) zmin=zminDet; | |
546 | if(zmax>zmaxDet) zmax=zmaxDet; | |
547 | ||
548 | Int_t n1 = GetChipFromLocal(0,zmin); | |
549 | array[nChipInW] = n1; | |
550 | nChipInW++; | |
551 | ||
552 | Int_t n2 = GetChipFromLocal(0,zmax); | |
553 | ||
554 | if(n2!=n1){ | |
555 | Int_t imin=TMath::Min(n1,n2); | |
556 | Int_t imax=TMath::Max(n1,n2); | |
557 | for(Int_t ichip=imin; ichip<=imax; ichip++){ | |
558 | if(ichip==n1) continue; | |
559 | array[nChipInW]=ichip; | |
560 | nChipInW++; | |
561 | } | |
562 | } | |
563 | ||
564 | return nChipInW; | |
565 | } | |
566 | //---------------------------------------------------------------------- |