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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 | ||
16 | #include <TMath.h> | |
17 | ||
18 | #include "AliITSsegmentationSPD.h" | |
19 | ||
20 | ClassImp(AliITSsegmentationSPD) | |
21 | ||
22 | ||
23 | Float_t ColFromZ300(Float_t z) { | |
24 | // Get column number for each z-coordinate taking into account the | |
25 | // extra pixels in z direction assuming 300 micron sized pixels. | |
26 | Float_t col = 0.0; | |
27 | Float_t pitchz = 300.0; | |
28 | col = Float_t (z/pitchz); | |
29 | return col; | |
30 | } | |
31 | //_____________________________________________________________________________ | |
32 | Float_t ZFromCol300(Int_t col) { | |
33 | // same comments as above | |
34 | // Get z-coordinate for each colunm number | |
35 | Float_t pitchz = 300.0; | |
36 | Float_t z = 0.0; | |
37 | z = (col+0.5)*pitchz; | |
38 | return z; | |
39 | } | |
40 | //_____________________________________________________________________________ | |
41 | Float_t ZpitchFromCol300(Int_t col) { | |
42 | // returns Z pixel pitch for 300 micron pixels. | |
43 | return 300.0; | |
44 | } | |
45 | //_____________________________________________________________________________ | |
46 | Float_t ColFromZ(Float_t z) { | |
47 | // hard-wired - keep it like this till we can parametrise | |
48 | // and get rid of AliITSgeomSPD425 | |
49 | // Get column number for each z-coordinate taking into account the | |
50 | // extra pixels in z direction | |
51 | ||
52 | Float_t col = 0; | |
53 | Float_t pitchz = 425; | |
54 | if( z < 13175) { | |
55 | col = Float_t(z/pitchz); | |
56 | } else if( z < 14425) { | |
57 | pitchz = 625; | |
58 | col = 31 + (z - 13175)/pitchz; | |
59 | } else if( z < 27175) { | |
60 | col = 33 + (z - 14425)/pitchz; | |
61 | } else if( z < 28425) { | |
62 | pitchz = 625; | |
63 | col = 63 + (z - 27175)/pitchz; | |
64 | } else if( z < 41175) { | |
65 | col = 65 + (z - 28425)/pitchz; | |
66 | } else if( z < 42425) { | |
67 | pitchz = 625; | |
68 | col = 95 + (z - 41175)/pitchz; | |
69 | } else if( z < 55175) { | |
70 | col = 97 + (z - 42425)/pitchz; | |
71 | } else if( z < 56425) { | |
72 | pitchz = 625; | |
73 | col = 127 + (z - 55175)/pitchz; | |
74 | } else if( z < 69175) { | |
75 | col = 129 + (z - 56425)/pitchz; | |
76 | } else if( z < 70425) { | |
77 | pitchz = 625; | |
78 | col = 159 + (z - 69175)/pitchz; | |
79 | } else if( z < 83600) { | |
80 | col = 161 + (z - 70425)/pitchz; | |
81 | } | |
e8189707 | 82 | return TMath::Abs(col); |
b0f5e3fc | 83 | } |
84 | ||
85 | //_____________________________________________________________________________ | |
86 | Float_t ZFromCol(Int_t col) { | |
87 | // same comments as above | |
88 | // Get z-coordinate for each colunm number | |
89 | ||
90 | Float_t pitchz = 425; | |
91 | Float_t z = 0; | |
92 | if( col >=0 && col <= 30 ) { | |
93 | z = (col + 0.5)*pitchz; | |
94 | } else if( col >= 31 && col <= 32) { | |
95 | pitchz = 625; | |
96 | z = 13175 + (col -31 + 0.5)*pitchz; | |
97 | } else if( col >= 33 && col <= 62) { | |
98 | z = 14425 + (col -33 + 0.5)*pitchz; | |
99 | } else if( col >= 63 && col <= 64) { | |
100 | pitchz = 625; | |
101 | z = 27175 + (col -63 + 0.5)*pitchz; | |
102 | } else if( col >= 65 && col <= 94) { | |
103 | z = 28425 + (col -65 + 0.5)*pitchz; | |
104 | } else if( col >= 95 && col <= 96) { | |
105 | pitchz = 625; | |
106 | z = 41175 + (col -95 + 0.5)*pitchz; | |
107 | } else if( col >= 97 && col <= 126) { | |
108 | z = 42425 + (col -97 + 0.5)*pitchz; | |
109 | } else if( col >= 127 && col <= 128) { | |
110 | pitchz = 625; | |
111 | z = 55175 + (col -127 + 0.5)*pitchz; | |
112 | } else if( col >= 129 && col <= 158) { | |
113 | z = 56425 + (col -129 + 0.5)*pitchz; | |
114 | } else if( col >= 159 && col <= 160) { | |
115 | pitchz = 625; | |
116 | z = 69175 + (col -159 + 0.5)*pitchz; | |
117 | } else if( col >= 161 && col <= 191) { | |
118 | z = 70425 + (col -161 + 0.5)*pitchz; | |
119 | } | |
120 | ||
121 | return z; | |
122 | } | |
123 | ||
124 | Float_t ZpitchFromCol(Int_t col) { | |
125 | // Get pitch size in z direction for each colunm | |
126 | ||
127 | Float_t pitchz = 425; | |
128 | if( col >=32 && col <= 33 ) { | |
129 | pitchz = 625; | |
130 | } else if( col >= 64 && col <= 65) { | |
131 | pitchz = 625; | |
132 | } else if( col >= 96 && col <= 97) { | |
133 | pitchz = 625; | |
134 | } else if( col >= 128 && col <= 129) { | |
135 | pitchz = 625; | |
136 | } else if( col >= 160 && col <= 161) { | |
137 | pitchz = 625; | |
138 | } | |
139 | return pitchz; | |
140 | } | |
141 | ||
142 | AliITSsegmentationSPD::AliITSsegmentationSPD(){ | |
143 | // Default constructor | |
144 | fNpx = 0; | |
145 | fNpz = 0; | |
146 | fCorr=0; | |
147 | fGeom = 0; | |
148 | ||
149 | } | |
150 | //____________________________________________________________________________ | |
151 | AliITSsegmentationSPD::AliITSsegmentationSPD(AliITSgeom *gm){ | |
152 | // Constructor | |
153 | fCorr=0; | |
154 | fNpx = 0; | |
155 | fNpz = 0; | |
156 | Init(); | |
157 | fGeom = gm; | |
158 | ||
159 | } | |
160 | //____________________________________________________________________________ | |
161 | AliITSsegmentationSPD& AliITSsegmentationSPD::operator=(AliITSsegmentationSPD &source){ | |
162 | // = operator | |
b0f5e3fc | 163 | if(this==&source) return *this; |
164 | this->fNpx = source.fNpx; | |
165 | this->fNpz = source.fNpz; | |
166 | this->fDx = source.fDx; | |
167 | this->fDy = source.fDy; | |
e8189707 | 168 | Int_t i; |
b0f5e3fc | 169 | for(i=0;i<256;i++) this->fCellSizeX[i] = source.fCellSizeX[i]; |
170 | for(i=0;i<280;i++) this->fCellSizeZ[i] = source.fCellSizeZ[i]; | |
171 | this->fCorr = new TF1(*(source.fCorr));// make a proper copy of the function | |
172 | this->fGeom = source.fGeom; // copy only the pointers. | |
173 | return *this; | |
174 | } | |
175 | //____________________________________________________________________________ | |
176 | AliITSsegmentationSPD::AliITSsegmentationSPD(AliITSsegmentationSPD &source){ | |
177 | // copy constructor | |
178 | *this = source; | |
179 | } | |
180 | //------------------------------ | |
181 | void AliITSsegmentationSPD::Init300(){ | |
182 | // Initialize infromation for 6 read out chip 300X50 micron pixel SPD | |
183 | // detectors. This chip is 150 microns thick by 1.28 cm in x by 8.37 cm | |
184 | // long. It has 256 50 micron pixels in x and 279 300 micron size | |
185 | // pixels in z. | |
186 | ||
b0f5e3fc | 187 | //const Float_t kconv=10000.; |
e8189707 | 188 | Int_t i; |
b0f5e3fc | 189 | fNpx = 256; // The number of X pixel Cell same as in fCellSizeX array size |
190 | fNpz = 279; // The number of Z pixel Cell same as in fCellSizeZ array size | |
191 | for(i=0;i<fNpx;i++) fCellSizeX[i] = 50.0; // microns all the same | |
192 | for(i=0;i<fNpz;i++) fCellSizeZ[i] = ZpitchFromCol300(i); // microns | |
193 | for(i=fNpz;i<280;i++) fCellSizeZ[i] = 0.0; // zero out rest of array | |
194 | fDx = 0; | |
195 | for(i=0;i<fNpx;i++) fDx += fCellSizeX[i]; | |
196 | fDz = 0; | |
197 | for(i=0;i<fNpz;i++) fDz += fCellSizeZ[i]; | |
198 | fDy = 300.0; //microns SPD sensitive layer thickness | |
199 | } | |
200 | ||
201 | //------------------------------ | |
202 | void AliITSsegmentationSPD::Init(){ | |
203 | // Initialize infromation for 6 read out chip 425X50 micron pixel SPD | |
204 | // detectors. This chip is 150 microns thick by 1.28 cm in x by 8.375 cm | |
205 | // long. It has 256 50 micron pixels in x and 197 mostly 425 micron size | |
206 | // pixels in z. The two pixels between each readout chip are 625 microns long. | |
207 | ||
b0f5e3fc | 208 | //const Float_t kconv=10000.; |
e8189707 | 209 | Int_t i; |
b0f5e3fc | 210 | fNpx = 256; // The number of X pixel Cell same as in fCellSizeX array size |
211 | fNpz = 192; // The number of Z pixel Cell same as in fCellSizeZ array size | |
212 | for(i=0;i<fNpx;i++) fCellSizeX[i] = 50.0; // microns all the same | |
213 | for(i=0;i<fNpz;i++) fCellSizeZ[i] = ZpitchFromCol(i); // microns | |
214 | for(i=fNpz;i<280;i++) fCellSizeZ[i] = 0.0; // zero out rest of array | |
215 | fDx = 0; | |
216 | for(i=0;i<fNpx;i++) fDx += fCellSizeX[i]; | |
217 | fDz = 0; | |
218 | for(i=0;i<fNpz;i++) fDz += fCellSizeZ[i]; | |
219 | fDy = 300.0; //microns SPD sensitive layer thickness | |
e8189707 | 220 | //printf(" AliITSsegmentationSPD - Init: fNpx fNpz fDx fDz %d %d %f %f\n",fNpx, fNpz, fDx, fDz); |
b0f5e3fc | 221 | |
222 | } | |
223 | //------------------------------ | |
e8189707 | 224 | void AliITSsegmentationSPD::SetNPads(Int_t p1, Int_t p2){ |
b0f5e3fc | 225 | // for SPD this function should be used ONLY when a beam test setup |
226 | // configuration is studied | |
227 | ||
228 | fNpx=p1; | |
229 | fNpz=p2; | |
230 | ||
231 | } | |
232 | //------------------------------ | |
233 | void AliITSsegmentationSPD::SetDetSize(Float_t p1, Float_t p2, Float_t p3){ | |
234 | // for SPD this function should be used ONLY when a beam test setup | |
235 | // configuration is studied | |
236 | ||
237 | fDx=p1; | |
238 | fDz=p2; | |
239 | fDy=p3; | |
240 | ||
241 | } | |
242 | //------------------------------ | |
243 | Float_t AliITSsegmentationSPD::Dpx(Int_t i){ | |
244 | //returs x pixel pitch for a give pixel | |
245 | return fCellSizeX[i]; | |
246 | } | |
247 | //------------------------------ | |
248 | Float_t AliITSsegmentationSPD::Dpz(Int_t i){ | |
249 | // returns z pixel pitch for a give pixel | |
250 | return ZpitchFromCol(i); | |
251 | } | |
252 | //------------------------------ | |
e8189707 | 253 | void AliITSsegmentationSPD::GetPadIxz(Float_t x,Float_t z,Int_t &ix,Int_t &iz){ |
b0f5e3fc | 254 | // Returns pixel coordinates (ix,iz) for given real local coordinates (x,z) |
255 | // | |
256 | ||
257 | // expects x, z in microns | |
258 | ||
259 | // same segmentation on x | |
260 | Float_t dpx=Dpx(0); | |
261 | ix = (Int_t)(x/dpx + 1); | |
262 | // different segmentation on z | |
263 | iz = (Int_t)(ColFromZ(z) + 1); | |
264 | ||
b0f5e3fc | 265 | |
266 | if (iz > fNpz) iz= fNpz; | |
267 | if (ix > fNpx) ix= fNpx; | |
b0f5e3fc | 268 | /* |
269 | if (iz < -fNpz) iz= -fNpz; | |
270 | if (ix < -fNpx) ix=-fNpx; | |
271 | */ | |
272 | } | |
273 | ||
274 | //------------------------------ | |
e8189707 | 275 | void AliITSsegmentationSPD::GetPadTxz(Float_t &x,Float_t &z){ |
276 | // local transformation of real local coordinates (x,z) | |
277 | // | |
278 | ||
279 | // expects x, z in microns | |
280 | ||
281 | // same segmentation on x | |
282 | Float_t dpx=Dpx(0); | |
283 | ||
284 | x /= dpx; | |
285 | z = ColFromZ(z); | |
286 | ||
287 | } | |
288 | //------------------------------ | |
289 | void AliITSsegmentationSPD::GetPadCxz(Int_t ix,Int_t iz,Float_t &x,Float_t&z){ | |
b0f5e3fc | 290 | // Transform from pixel to real local coordinates |
291 | ||
292 | // returns x, z in microns | |
293 | ||
294 | Float_t dpx=Dpx(0); | |
295 | ||
296 | x = (ix>0) ? Float_t(ix*dpx)-dpx/2. : Float_t(ix*dpx)+dpx/2.; | |
297 | z = ZFromCol(iz); | |
298 | ||
299 | ||
300 | } | |
301 | //------------------------------ | |
302 | void AliITSsegmentationSPD:: | |
303 | Neighbours(Int_t iX, Int_t iZ, Int_t* Nlist, Int_t Xlist[8], Int_t Zlist[8]){ | |
304 | // returns the neighbouring pixels for use in Cluster Finders and the like. | |
305 | /* | |
306 | *Nlist=4;Xlist[0]=Xlist[1]=iX;Xlist[2]=iX-1;Xlist[3]=iX+1; | |
307 | Zlist[0]=iZ-1;Zlist[1]=iZ+1;Zlist[2]=Zlist[3]=iZ; | |
308 | */ | |
309 | ||
310 | ||
311 | *Nlist=8; | |
312 | Xlist[0]=Xlist[1]=iX; | |
313 | Xlist[2]=iX-1; | |
314 | Xlist[3]=iX+1; | |
315 | Zlist[0]=iZ-1; | |
316 | Zlist[1]=iZ+1; | |
317 | Zlist[2]=Zlist[3]=iZ; | |
318 | ||
319 | // Diagonal elements | |
320 | Xlist[4]=iX+1; | |
321 | Zlist[4]=iZ+1; | |
322 | ||
323 | Xlist[5]=iX-1; | |
324 | Zlist[5]=iZ-1; | |
325 | ||
326 | Xlist[6]=iX-1; | |
327 | Zlist[6]=iZ+1; | |
328 | ||
329 | Xlist[7]=iX+1; | |
330 | Zlist[7]=iZ-1; | |
331 | } |