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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 | ||
a5e51e90 | 16 | /* $Id:$ */ |
c9649d1e | 17 | #include <TGeoManager.h> |
18 | #include <TGeoVolume.h> | |
19 | #include <TGeoBBox.h> | |
b0f5e3fc | 20 | #include "AliITSsegmentationSPD.h" |
55d2c544 | 21 | //#include "AliITSgeom.h" |
22 | ////////////////////////////////////////////////////// | |
23 | // Segmentation class for // | |
24 | // pixels // | |
25 | // // | |
26 | ////////////////////////////////////////////////////// | |
b0f5e3fc | 27 | ClassImp(AliITSsegmentationSPD) |
28 | ||
55d2c544 | 29 | //_____________________________________________________________________________ |
c9649d1e | 30 | AliITSsegmentationSPD::AliITSsegmentationSPD(Option_t *opt): AliITSsegmentation(), |
e56160b8 | 31 | fNpx(0), |
32 | fNpz(0){ | |
55d2c544 | 33 | // Default constructor |
c9649d1e | 34 | |
a5e51e90 | 35 | // Initialization to default values |
36 | Init(); | |
37 | ||
38 | // Initialization of detector dimensions from TGeo | |
c9649d1e | 39 | if(strstr(opt,"TGeo")){ |
40 | if(!gGeoManager){ | |
a5e51e90 | 41 | AliError("Geometry is not initialized\n Using hardwired default values"); |
c9649d1e | 42 | return; |
43 | } | |
44 | TGeoVolume *v=NULL; | |
45 | v = gGeoManager->GetVolume("ITSSPDlay1-sensor"); | |
46 | if(!v){ | |
47 | AliWarning("TGeo volume ITSSPDlay1-sensor not found (hint: use v11Hybrid geometry)\n Using hardwired default values"); | |
c9649d1e | 48 | } |
49 | else { | |
50 | TGeoBBox *s=(TGeoBBox*)v->GetShape(); | |
51 | SetDetSize(s->GetDX()*20000.,s->GetDZ()*20000.,s->GetDY()*20000.); | |
52 | } | |
c9649d1e | 53 | } |
55d2c544 | 54 | } |
b0f5e3fc | 55 | |
a5e51e90 | 56 | //______________________________________________________________________ |
57 | AliITSsegmentationSPD::AliITSsegmentationSPD(AliITSgeom *gm): | |
58 | AliITSsegmentation(gm), | |
59 | fNpx(0), | |
60 | fNpz(0){ | |
61 | // Constructor | |
62 | fCorr=0; | |
63 | Init(); | |
64 | } | |
65 | ||
55d2c544 | 66 | //_____________________________________________________________________________ |
67 | Float_t AliITSsegmentationSPD::ColFromZ300(Float_t z) const { | |
b0f5e3fc | 68 | // Get column number for each z-coordinate taking into account the |
69 | // extra pixels in z direction assuming 300 micron sized pixels. | |
70 | Float_t col = 0.0; | |
71 | Float_t pitchz = 300.0; | |
72 | col = Float_t (z/pitchz); | |
73 | return col; | |
74 | } | |
75 | //_____________________________________________________________________________ | |
55d2c544 | 76 | Float_t AliITSsegmentationSPD::ZFromCol300(Int_t col) const { |
b0f5e3fc | 77 | // same comments as above |
78 | // Get z-coordinate for each colunm number | |
79 | Float_t pitchz = 300.0; | |
80 | Float_t z = 0.0; | |
81 | z = (col+0.5)*pitchz; | |
82 | return z; | |
83 | } | |
84 | //_____________________________________________________________________________ | |
55d2c544 | 85 | Float_t AliITSsegmentationSPD::ZpitchFromCol300(Int_t col) const { |
b0f5e3fc | 86 | // returns Z pixel pitch for 300 micron pixels. |
ac74f489 | 87 | |
88 | col = 0; // done to remove unused variable warning. | |
89 | return 300.0; | |
b0f5e3fc | 90 | } |
91 | //_____________________________________________________________________________ | |
55d2c544 | 92 | Float_t AliITSsegmentationSPD::ColFromZ(Float_t z) const { |
f1e07e4b | 93 | // hard-wired - keep it like this till we can parametrise |
94 | // and get rid of AliITSgeomSPD425 | |
95 | // Get column number for each z-coordinate taking into account the | |
96 | // extra pixels in z direction | |
97 | Int_t i; | |
98 | Float_t s,col; | |
5d3918d6 | 99 | |
f1e07e4b | 100 | if(z<0||z>fDz){ |
f6b6d58e | 101 | AliError(Form("z=%f outside of range 0.0<=z<fDz=%f",z,fDz)); |
f1e07e4b | 102 | return 0.0; // error |
103 | } // end if outsize of detector | |
104 | s = 0.0; | |
105 | i = -1; | |
106 | while(z>s){ | |
107 | i++; | |
108 | s += fCellSizeZ[i]; | |
109 | } // end while | |
110 | s -= fCellSizeZ[i]; | |
111 | col = (Float_t) i + (z-s)/fCellSizeZ[i]; | |
112 | return col; | |
113 | ||
114 | /* | |
b0f5e3fc | 115 | Float_t col = 0; |
116 | Float_t pitchz = 425; | |
117 | if( z < 13175) { | |
118 | col = Float_t(z/pitchz); | |
119 | } else if( z < 14425) { | |
120 | pitchz = 625; | |
121 | col = 31 + (z - 13175)/pitchz; | |
122 | } else if( z < 27175) { | |
123 | col = 33 + (z - 14425)/pitchz; | |
124 | } else if( z < 28425) { | |
125 | pitchz = 625; | |
126 | col = 63 + (z - 27175)/pitchz; | |
127 | } else if( z < 41175) { | |
128 | col = 65 + (z - 28425)/pitchz; | |
129 | } else if( z < 42425) { | |
130 | pitchz = 625; | |
131 | col = 95 + (z - 41175)/pitchz; | |
132 | } else if( z < 55175) { | |
133 | col = 97 + (z - 42425)/pitchz; | |
134 | } else if( z < 56425) { | |
135 | pitchz = 625; | |
136 | col = 127 + (z - 55175)/pitchz; | |
137 | } else if( z < 69175) { | |
138 | col = 129 + (z - 56425)/pitchz; | |
139 | } else if( z < 70425) { | |
140 | pitchz = 625; | |
141 | col = 159 + (z - 69175)/pitchz; | |
142 | } else if( z < 83600) { | |
143 | col = 161 + (z - 70425)/pitchz; | |
144 | } | |
f1e07e4b | 145 | return TMath::Abs(col);*/ |
b0f5e3fc | 146 | } |
147 | ||
148 | //_____________________________________________________________________________ | |
55d2c544 | 149 | Float_t AliITSsegmentationSPD::ZFromCol(Int_t col) const { |
f1e07e4b | 150 | // same comments as above |
151 | // Get z-coordinate for each colunm number | |
152 | Int_t i; | |
153 | Float_t z; | |
5d3918d6 | 154 | |
f1e07e4b | 155 | if(col<0||col>=fNpz){ |
f6b6d58e | 156 | AliError(Form("col=%d outside of range 0<=col<fNpZ=%d",col,fNpz)); |
f1e07e4b | 157 | return 0.0; // error |
158 | } // end if outsize of detector | |
159 | z = 0.0; | |
160 | for(i=0;i<col;i++) z += fCellSizeZ[i]; | |
161 | z += 0.5*fCellSizeZ[col]; | |
162 | return z; | |
163 | ||
164 | /* | |
b0f5e3fc | 165 | Float_t pitchz = 425; |
166 | Float_t z = 0; | |
167 | if( col >=0 && col <= 30 ) { | |
168 | z = (col + 0.5)*pitchz; | |
169 | } else if( col >= 31 && col <= 32) { | |
170 | pitchz = 625; | |
171 | z = 13175 + (col -31 + 0.5)*pitchz; | |
172 | } else if( col >= 33 && col <= 62) { | |
173 | z = 14425 + (col -33 + 0.5)*pitchz; | |
174 | } else if( col >= 63 && col <= 64) { | |
175 | pitchz = 625; | |
176 | z = 27175 + (col -63 + 0.5)*pitchz; | |
177 | } else if( col >= 65 && col <= 94) { | |
178 | z = 28425 + (col -65 + 0.5)*pitchz; | |
179 | } else if( col >= 95 && col <= 96) { | |
180 | pitchz = 625; | |
181 | z = 41175 + (col -95 + 0.5)*pitchz; | |
182 | } else if( col >= 97 && col <= 126) { | |
183 | z = 42425 + (col -97 + 0.5)*pitchz; | |
184 | } else if( col >= 127 && col <= 128) { | |
185 | pitchz = 625; | |
186 | z = 55175 + (col -127 + 0.5)*pitchz; | |
187 | } else if( col >= 129 && col <= 158) { | |
188 | z = 56425 + (col -129 + 0.5)*pitchz; | |
189 | } else if( col >= 159 && col <= 160) { | |
190 | pitchz = 625; | |
191 | z = 69175 + (col -159 + 0.5)*pitchz; | |
192 | } else if( col >= 161 && col <= 191) { | |
193 | z = 70425 + (col -161 + 0.5)*pitchz; | |
5752a110 | 194 | } |
b0f5e3fc | 195 | |
f1e07e4b | 196 | return z;*/ |
b0f5e3fc | 197 | } |
5752a110 | 198 | //______________________________________________________________________ |
55d2c544 | 199 | Float_t AliITSsegmentationSPD::ZpitchFromCol(Int_t col) const { |
f1e07e4b | 200 | // Get pitch size in z direction for each colunm |
b0f5e3fc | 201 | |
87663651 | 202 | Float_t pitchz = 425.; |
5752a110 | 203 | if(col < 0){ |
204 | pitchz = 0.0; | |
91378d45 | 205 | } else if(col >= 31 && col <= 32) { |
87663651 | 206 | pitchz = 625.; |
91378d45 | 207 | } else if(col >= 63 && col <= 64) { |
87663651 | 208 | pitchz = 625.; |
91378d45 | 209 | } else if(col >= 95 && col <= 96) { |
87663651 | 210 | pitchz = 625.; |
91378d45 | 211 | } else if(col >= 127 && col <= 128) { |
87663651 | 212 | pitchz = 625.; |
91378d45 | 213 | } else if(col >= 159 && col <= 160) { |
87663651 | 214 | pitchz = 625.; |
f1e07e4b | 215 | } else if(col>=192){ |
87663651 | 216 | pitchz = 425.; |
5752a110 | 217 | } |
218 | return pitchz; | |
b0f5e3fc | 219 | } |
a5e51e90 | 220 | |
5752a110 | 221 | //______________________________________________________________________ |
55d2c544 | 222 | void AliITSsegmentationSPD::Copy(TObject &obj) const { |
223 | // protected method. copy this to obj | |
224 | AliITSsegmentation::Copy(obj); | |
225 | ((AliITSsegmentationSPD& ) obj).fNpx = fNpx; | |
226 | ((AliITSsegmentationSPD& ) obj).fNpz = fNpz; | |
227 | Int_t i; | |
228 | for(i=0;i<256;i++) | |
229 | ((AliITSsegmentationSPD& ) obj).fCellSizeX[i] = fCellSizeX[i]; | |
230 | for(i=0;i<280;i++) | |
231 | ((AliITSsegmentationSPD& ) obj).fCellSizeZ[i] = fCellSizeZ[i]; | |
232 | } | |
233 | ||
234 | //______________________________________________________________________ | |
235 | AliITSsegmentationSPD& AliITSsegmentationSPD::operator=(const AliITSsegmentationSPD &source){ | |
b0f5e3fc | 236 | // = operator |
b0f5e3fc | 237 | if(this==&source) return *this; |
55d2c544 | 238 | source.Copy(*this); |
b0f5e3fc | 239 | return *this; |
240 | } | |
241 | //____________________________________________________________________________ | |
55d2c544 | 242 | AliITSsegmentationSPD::AliITSsegmentationSPD(const AliITSsegmentationSPD &source) : |
e56160b8 | 243 | AliITSsegmentation(source), |
244 | fNpx(0), | |
245 | fNpz(0){ | |
b0f5e3fc | 246 | // copy constructor |
55d2c544 | 247 | source.Copy(*this); |
b0f5e3fc | 248 | } |
91378d45 | 249 | //---------------------------------------------------------------------- |
250 | void AliITSsegmentationSPD::SetBinSize(Float_t *x,Float_t *z){ | |
251 | // Fills the array of pixel sizes in x, microns | |
252 | // The input array x must have 256 elements. | |
253 | Int_t i; | |
254 | ||
255 | for(i=0;i<256;i++) fCellSizeX[i] = x[i]; | |
7775613f | 256 | for(i=0;i<280;i++) fCellSizeZ[i] = z[i]; |
91378d45 | 257 | return; |
258 | } | |
259 | //---------------------------------------------------------------------- | |
b0f5e3fc | 260 | void AliITSsegmentationSPD::Init300(){ |
261 | // Initialize infromation for 6 read out chip 300X50 micron pixel SPD | |
262 | // detectors. This chip is 150 microns thick by 1.28 cm in x by 8.37 cm | |
263 | // long. It has 256 50 micron pixels in x and 279 300 micron size | |
264 | // pixels in z. | |
265 | ||
b0f5e3fc | 266 | //const Float_t kconv=10000.; |
e8189707 | 267 | Int_t i; |
b0f5e3fc | 268 | fNpx = 256; // The number of X pixel Cell same as in fCellSizeX array size |
269 | fNpz = 279; // The number of Z pixel Cell same as in fCellSizeZ array size | |
270 | for(i=0;i<fNpx;i++) fCellSizeX[i] = 50.0; // microns all the same | |
f1e07e4b | 271 | for(i=0;i<280;i++) fCellSizeZ[i] = ZpitchFromCol300(i); // microns |
272 | // for(i=fNpz;i<280;i++) fCellSizeZ[i] = 0.0; // zero out rest of array | |
b0f5e3fc | 273 | fDx = 0; |
274 | for(i=0;i<fNpx;i++) fDx += fCellSizeX[i]; | |
275 | fDz = 0; | |
276 | for(i=0;i<fNpz;i++) fDz += fCellSizeZ[i]; | |
277 | fDy = 300.0; //microns SPD sensitive layer thickness | |
278 | } | |
279 | ||
280 | //------------------------------ | |
281 | void AliITSsegmentationSPD::Init(){ | |
a5e51e90 | 282 | // Initialize infromation for 6 read out chip 425X50 micron pixel SPD |
283 | // detectors. This chip is 150 microns thick by 1.28 cm in x by 8.375 cm | |
284 | // long. It has 256 50 micron pixels in x and 197 mostly 425 micron size | |
285 | // pixels in z. The two pixels between each readout chip are 625 microns long. | |
b0f5e3fc | 286 | |
a5e51e90 | 287 | Float_t bx[256],bz[280]; |
288 | Int_t i; | |
289 | SetNPads(256,160); // Number of Bins in x and z | |
290 | for(i=000;i<256;i++) bx[i] = 50.0; // in x all are 50 microns. | |
291 | for(i=000;i<160;i++) bz[i] = 425.0; // most are 425 microns except below | |
292 | for(i=160;i<280;i++) bz[i] = 0.0; // Outside of detector. | |
293 | bz[ 31] = bz[ 32] = 625.0; // first chip boundary | |
294 | bz[ 63] = bz[ 64] = 625.0; // first chip boundary | |
295 | bz[ 95] = bz[ 96] = 625.0; // first chip boundary | |
296 | bz[127] = bz[128] = 625.0; // first chip boundary | |
297 | bz[160] = 425.0; // Set so that there is no zero pixel size for fNz. | |
298 | SetBinSize(bx,bz); | |
299 | SetDetSize(12800,69600,200); // full lengths (x,z,y) in microns | |
b0f5e3fc | 300 | |
301 | } | |
302 | //------------------------------ | |
e8189707 | 303 | void AliITSsegmentationSPD::SetNPads(Int_t p1, Int_t p2){ |
b0f5e3fc | 304 | // for SPD this function should be used ONLY when a beam test setup |
305 | // configuration is studied | |
306 | ||
307 | fNpx=p1; | |
308 | fNpz=p2; | |
309 | ||
310 | } | |
b0f5e3fc | 311 | |
b0f5e3fc | 312 | //------------------------------ |
55d2c544 | 313 | Float_t AliITSsegmentationSPD::Dpx(Int_t i) const { |
f1e07e4b | 314 | //returs x pixel pitch for a give pixel |
315 | if(i<0||i>=256) return 0.0; | |
316 | return fCellSizeX[i]; | |
b0f5e3fc | 317 | } |
318 | //------------------------------ | |
55d2c544 | 319 | Float_t AliITSsegmentationSPD::Dpz(Int_t i) const { |
f1e07e4b | 320 | // returns z pixel pitch for a give pixel |
321 | if(i<0||i>=280) return 0.0; | |
322 | return fCellSizeZ[i]; | |
b0f5e3fc | 323 | } |
324 | //------------------------------ | |
55d2c544 | 325 | void AliITSsegmentationSPD::GetPadIxz(Float_t x,Float_t z,Int_t &ix,Int_t &iz) const { |
b0f5e3fc | 326 | // Returns pixel coordinates (ix,iz) for given real local coordinates (x,z) |
327 | // | |
328 | ||
329 | // expects x, z in microns | |
330 | ||
331 | // same segmentation on x | |
332 | Float_t dpx=Dpx(0); | |
333 | ix = (Int_t)(x/dpx + 1); | |
334 | // different segmentation on z | |
335 | iz = (Int_t)(ColFromZ(z) + 1); | |
336 | ||
b0f5e3fc | 337 | |
338 | if (iz > fNpz) iz= fNpz; | |
339 | if (ix > fNpx) ix= fNpx; | |
b0f5e3fc | 340 | /* |
341 | if (iz < -fNpz) iz= -fNpz; | |
342 | if (ix < -fNpx) ix=-fNpx; | |
343 | */ | |
344 | } | |
345 | ||
346 | //------------------------------ | |
55d2c544 | 347 | void AliITSsegmentationSPD::GetPadTxz(Float_t &x,Float_t &z) const{ |
e8189707 | 348 | // local transformation of real local coordinates (x,z) |
349 | // | |
350 | ||
351 | // expects x, z in microns | |
352 | ||
353 | // same segmentation on x | |
354 | Float_t dpx=Dpx(0); | |
355 | ||
356 | x /= dpx; | |
357 | z = ColFromZ(z); | |
358 | ||
359 | } | |
360 | //------------------------------ | |
55d2c544 | 361 | void AliITSsegmentationSPD::GetPadCxz(Int_t ix,Int_t iz,Float_t &x,Float_t&z) const { |
b0f5e3fc | 362 | // Transform from pixel to real local coordinates |
363 | ||
364 | // returns x, z in microns | |
365 | ||
366 | Float_t dpx=Dpx(0); | |
367 | ||
368 | x = (ix>0) ? Float_t(ix*dpx)-dpx/2. : Float_t(ix*dpx)+dpx/2.; | |
369 | z = ZFromCol(iz); | |
370 | ||
371 | ||
372 | } | |
373 | //------------------------------ | |
374 | void AliITSsegmentationSPD:: | |
55d2c544 | 375 | Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[8], Int_t Zlist[8]) const { |
b0f5e3fc | 376 | // returns the neighbouring pixels for use in Cluster Finders and the like. |
377 | /* | |
378 | *Nlist=4;Xlist[0]=Xlist[1]=iX;Xlist[2]=iX-1;Xlist[3]=iX+1; | |
379 | Zlist[0]=iZ-1;Zlist[1]=iZ+1;Zlist[2]=Zlist[3]=iZ; | |
380 | */ | |
381 | ||
382 | ||
383 | *Nlist=8; | |
384 | Xlist[0]=Xlist[1]=iX; | |
385 | Xlist[2]=iX-1; | |
386 | Xlist[3]=iX+1; | |
387 | Zlist[0]=iZ-1; | |
388 | Zlist[1]=iZ+1; | |
389 | Zlist[2]=Zlist[3]=iZ; | |
390 | ||
391 | // Diagonal elements | |
392 | Xlist[4]=iX+1; | |
393 | Zlist[4]=iZ+1; | |
394 | ||
395 | Xlist[5]=iX-1; | |
396 | Zlist[5]=iZ-1; | |
397 | ||
398 | Xlist[6]=iX-1; | |
399 | Zlist[6]=iZ+1; | |
400 | ||
401 | Xlist[7]=iX+1; | |
402 | Zlist[7]=iZ-1; | |
403 | } | |
5752a110 | 404 | //______________________________________________________________________ |
aacedc3e | 405 | Bool_t AliITSsegmentationSPD::LocalToDet(Float_t x,Float_t z, |
406 | Int_t &ix,Int_t &iz) const { | |
407 | // Transformation from Geant detector centered local coordinates (cm) to | |
408 | // Pixel cell numbers ix and iz. | |
409 | // Input: | |
410 | // Float_t x detector local coordinate x in cm with respect to | |
411 | // the center of the sensitive volume. | |
412 | // Float_t z detector local coordinate z in cm with respect to | |
413 | // the center of the sensitive volulme. | |
414 | // Output: | |
415 | // Int_t ix detector x cell coordinate. Has the range | |
416 | // 0<=ix<fNpx. | |
417 | // Int_t iz detector z cell coordinate. Has the range | |
418 | // 0<=iz<fNpz. | |
419 | // Return: | |
420 | // kTRUE if point x,z is inside sensitive volume, kFALSE otherwise. | |
421 | // A value of -1 for ix or iz indecates that this point is outside of the | |
422 | // detector segmentation as defined. | |
5752a110 | 423 | Int_t i,j; |
424 | Float_t dx,dz; | |
425 | const Float_t kconv = 1.0E-04; // converts microns to cm. | |
426 | ||
427 | dx = -0.5*kconv*Dx(); | |
428 | dz = -0.5*kconv*Dz(); | |
429 | ix = -1; | |
430 | iz = -1; | |
aacedc3e | 431 | if(x<dx) return kFALSE; // outside x range. |
432 | if(z<dz) return kFALSE; // outside z range. | |
5752a110 | 433 | for(i=0;i<Npx();i++){ |
434 | dx += kconv*fCellSizeX[i]; | |
435 | if(x<dx) break; | |
436 | } // end for i | |
aacedc3e | 437 | if(i>=Npx()) return kFALSE; // outside x range. |
5752a110 | 438 | for(j=0;j<Npz();j++){ |
439 | dz += kconv*fCellSizeZ[j]; | |
440 | if(z<dz) break; | |
441 | } // end for j | |
aacedc3e | 442 | if(j>=Npz()) return kFALSE; // outside z range. |
5752a110 | 443 | ix = i; |
444 | iz = j; | |
aacedc3e | 445 | return kTRUE; // Found ix and iz, return. |
5752a110 | 446 | } |
447 | //______________________________________________________________________ | |
55d2c544 | 448 | void AliITSsegmentationSPD::DetToLocal(Int_t ix,Int_t iz,Float_t &x,Float_t &z) const |
5752a110 | 449 | { |
450 | // Transformation from Detector cell coordiantes to Geant detector centerd | |
451 | // local coordinates (cm). | |
452 | // Input: | |
453 | // Int_t ix detector x cell coordinate. Has the range 0<=ix<fNpx. | |
454 | // Int_t iz detector z cell coordinate. Has the range 0<=iz<fNpz. | |
455 | // Output: | |
456 | // Float_t x detector local coordinate x in cm with respect to the | |
457 | // center of the sensitive volume. | |
458 | // Float_t z detector local coordinate z in cm with respect to the | |
459 | // center of the sensitive volulme. | |
460 | // If ix and or iz is outside of the segmentation range a value of -0.5*Dx() | |
461 | // or -0.5*Dz() is returned. | |
462 | Int_t i,j; | |
463 | const Float_t kconv = 1.0E-04; // converts microns to cm. | |
464 | ||
465 | x = -0.5*kconv*Dx(); // default value. | |
466 | z = -0.5*kconv*Dz(); // default value. | |
467 | if(ix<0 || ix>=Npx()) return; // outside of detector | |
468 | if(iz<0 || iz>=Npz()) return; // outside of detctor | |
469 | for(i=0;i<ix;i++) x += kconv*fCellSizeX[i]; // sum up to cell ix-1 | |
470 | x += 0.5*kconv*fCellSizeX[ix]; // add 1/2 of cell ix for center location. | |
471 | for(j=0;j<iz;j++) z += kconv*fCellSizeZ[j]; // sum up cell iz-1 | |
472 | z += 0.5*kconv*fCellSizeZ[iz]; // add 1/2 of cell iz for center location. | |
473 | return; // Found x and z, return. | |
474 | } | |
bd8ff387 | 475 | //______________________________________________________________________ |
476 | void AliITSsegmentationSPD::CellBoundries(Int_t ix,Int_t iz, | |
477 | Double_t &xl,Double_t &xu, | |
55d2c544 | 478 | Double_t &zl,Double_t &zu) const |
bd8ff387 | 479 | { |
480 | // Transformation from Detector cell coordiantes to Geant detector centerd | |
481 | // local coordinates (cm). | |
482 | // Input: | |
483 | // Int_t ix detector x cell coordinate. Has the range 0<=ix<fNpx. | |
484 | // Int_t iz detector z cell coordinate. Has the range 0<=iz<fNpz. | |
485 | // Output: | |
486 | // Double_t xl detector local coordinate cell lower bounds x in cm | |
487 | // with respect to the center of the sensitive volume. | |
488 | // Double_t xu detector local coordinate cell upper bounds x in cm | |
489 | // with respect to the center of the sensitive volume. | |
490 | // Double_t zl detector local coordinate lower bounds z in cm with | |
491 | // respect to the center of the sensitive volulme. | |
492 | // Double_t zu detector local coordinate upper bounds z in cm with | |
493 | // respect to the center of the sensitive volulme. | |
494 | // If ix and or iz is outside of the segmentation range a value of -0.5*Dx() | |
495 | // and -0.5*Dx() or -0.5*Dz() and -0.5*Dz() are returned. | |
496 | Int_t i,j; | |
497 | const Float_t kconv = 1.0E-04; // converts microns to cm. | |
498 | Float_t x,z; | |
499 | ||
500 | xl = xu = x = -0.5*kconv*Dx(); // default value. | |
501 | zl = zu = z = -0.5*kconv*Dz(); // default value. | |
502 | if(ix<0 || ix>=Npx()) return; // outside of detector | |
503 | if(iz<0 || iz>=Npz()) return; // outside of detctor | |
504 | for(i=0;i<ix;i++) x += kconv*fCellSizeX[i]; // sum up to cell ix-1 | |
505 | xl = x; | |
506 | x += kconv*fCellSizeX[ix]; | |
507 | xu = x; | |
508 | for(j=0;j<iz;j++) z += kconv*fCellSizeZ[j]; // sum up cell iz-1 | |
509 | zl = z; | |
510 | z += kconv*fCellSizeZ[iz]; | |
511 | zu = z; | |
512 | return; // Found x and z, return. | |
513 | } |