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4c503756 | 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 | /* | |
17 | $Log$ | |
18 | */ | |
19 | ||
20 | ///////////////////////////////////////////////////// | |
21 | // Segmentation classes for slat modules // | |
22 | // to be used with AluMUONSegmentationSlat // | |
23 | ///////////////////////////////////////////////////// | |
24 | ||
25 | ||
26 | #include "AliMUONSegmentationSlatModule.h" | |
27 | #include <TMath.h> | |
28 | #include <iostream.h> | |
29 | ||
30 | #include "AliMUONSegmentationV01.h" | |
31 | ||
32 | //___________________________________________ | |
33 | ClassImp(AliMUONSegmentationSlatModule) | |
34 | ||
35 | AliMUONSegmentationSlatModule::AliMUONSegmentationSlatModule() | |
36 | { | |
37 | // Default constructor | |
38 | fNsec=4; | |
39 | fNDiv = new TArrayI(fNsec); | |
40 | fDpxD = new TArrayF(fNsec); | |
41 | (*fNDiv)[0]=(*fNDiv)[1]=(*fNDiv)[2]=(*fNDiv)[3]=0; | |
42 | (*fDpxD)[0]=(*fDpxD)[1]=(*fDpxD)[2]=(*fDpxD)[3]=0; | |
43 | } | |
44 | ||
45 | void AliMUONSegmentationSlatModule::SetPcbBoards(Int_t n[4]) | |
46 | { | |
47 | // | |
48 | // Set Pcb Board segmentation zones | |
49 | for (Int_t i=0; i<4; i++) fPcbBoards[i]=n[i]; | |
50 | } | |
51 | ||
52 | ||
53 | void AliMUONSegmentationSlatModule::SetPadDivision(Int_t ndiv[4]) | |
54 | { | |
55 | // | |
56 | // Defines the pad size perp. to the anode wire (y) for different sectors. | |
57 | // Pad sizes are defined as integral fractions ndiv of a basis pad size | |
58 | // fDpx | |
59 | // | |
60 | for (Int_t i=0; i<4; i++) { | |
61 | (*fNDiv)[i]=ndiv[i]; | |
62 | } | |
63 | ndiv[0]=ndiv[1]; | |
64 | } | |
65 | ||
66 | Float_t AliMUONSegmentationSlatModule::Dpx(Int_t isec) const | |
67 | { | |
68 | // Return x-strip width | |
69 | return (*fDpxD)[isec]; | |
70 | } | |
71 | ||
72 | ||
73 | Float_t AliMUONSegmentationSlatModule::Dpy(Int_t isec) const | |
74 | { | |
75 | // Return y-strip width | |
76 | ||
77 | return fDpy; | |
78 | } | |
79 | ||
80 | ||
81 | void AliMUONSegmentationSlatModule:: | |
82 | GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy) | |
83 | { | |
84 | // Returns pad coordinates (ix,iy) for given real coordinates (x,y) | |
85 | // | |
86 | iy = Int_t(y/fDpy)+1; | |
87 | if (iy > fNpy) iy= fNpy; | |
88 | // | |
89 | // Find sector isec | |
90 | ||
91 | Int_t isec=-1; | |
92 | for (Int_t i=fNsec-1; i > 0; i--) { | |
93 | if (x >= fCx[i-1]) { | |
94 | isec=i; | |
95 | break; | |
96 | } | |
97 | } | |
98 | ||
99 | if (isec>0) { | |
100 | ix= Int_t((x-fCx[isec-1])/(*fDpxD)[isec]) | |
101 | +fNpxS[isec-1]+1; | |
102 | } else if (isec == 0) { | |
103 | ix= Int_t(x/(*fDpxD)[isec])+1; | |
104 | } else { | |
105 | ix=0; | |
106 | iy=0; | |
107 | } | |
108 | } | |
109 | ||
110 | void AliMUONSegmentationSlatModule:: | |
111 | GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y) | |
112 | { | |
113 | // Returns real coordinates (x,y) for given pad coordinates (ix,iy) | |
114 | // | |
115 | y = Float_t(iy*fDpy)-fDpy/2.; | |
116 | // | |
117 | // Find sector isec | |
118 | Int_t isec=AliMUONSegmentationSlatModule::Sector(ix,iy); | |
119 | if (isec == -1) printf("\n PadC %d %d %d \n ", isec, ix, iy); | |
120 | // | |
121 | if (isec>0) { | |
122 | x = fCx[isec-1]+(ix-fNpxS[isec-1])*(*fDpxD)[isec]; | |
123 | x = x-(*fDpxD)[isec]/2; | |
124 | } else { | |
125 | x=y=0; | |
126 | } | |
127 | } | |
128 | ||
129 | void AliMUONSegmentationSlatModule:: | |
130 | SetPad(Int_t ix, Int_t iy) | |
131 | { | |
132 | // | |
133 | // Sets virtual pad coordinates, needed for evaluating pad response | |
134 | // outside the tracking program | |
135 | GetPadC(ix,iy,fX,fY); | |
136 | fSector=Sector(ix,iy); | |
137 | } | |
138 | ||
139 | void AliMUONSegmentationSlatModule:: | |
140 | SetHit(Float_t x, Float_t y) | |
141 | { | |
142 | fXhit = x; | |
143 | fYhit = y; | |
144 | ||
145 | if (x < 0) fXhit = 0; | |
146 | if (y < 0) fYhit = 0; | |
147 | ||
148 | if (x >= fCx[fNsec-1]) fXhit = fCx[fNsec-1]; | |
149 | if (y >= fDyPCB) fYhit = fDyPCB; | |
150 | ||
151 | ||
152 | } | |
153 | ||
154 | ||
155 | void AliMUONSegmentationSlatModule:: | |
156 | FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy) | |
157 | { | |
158 | // Initialises iteration over pads for charge distribution algorithm | |
159 | // | |
160 | // | |
161 | // Find the wire position (center of charge distribution) | |
162 | Float_t x0a=GetAnod(xhit); | |
163 | fXhit=x0a; | |
164 | fYhit=yhit; | |
165 | // | |
166 | // and take fNsigma*sigma around this center | |
167 | Float_t x01=x0a - dx; | |
168 | Float_t x02=x0a + dx; | |
169 | Float_t y01=yhit - dy; | |
170 | Float_t y02=yhit + dy; | |
171 | ||
172 | if (x01 < 0) x01 = 0; | |
173 | if (y01 < 0) y01 = 0; | |
174 | ||
175 | Int_t isec=-1; | |
176 | for (Int_t i=fNsec-1; i > 0; i--) { | |
177 | if (x02 >= fCx[i-1]) { | |
178 | isec=i; | |
179 | break; | |
180 | } | |
181 | } | |
182 | ||
183 | if (x02 >= fCx[fNsec-1]) x02 = fCx[fNsec-1]; | |
184 | if (y02 >= fDyPCB) y02 = fDyPCB; | |
185 | // | |
186 | // find the pads over which the charge distributes | |
187 | GetPadI(x01,y01,fIxmin,fIymin); | |
188 | GetPadI(x02,y02,fIxmax,fIymax); | |
189 | if (fIxmax > fNpx) fIxmax=fNpx; | |
190 | if (fIymax > fNpyS[isec]) fIymax = fNpyS[isec]; | |
191 | fXmin=x01; | |
192 | fXmax=x02; | |
193 | fYmin=y01; | |
194 | fYmax=y02; | |
195 | ||
196 | // | |
197 | // Set current pad to lower left corner | |
198 | if (fIxmax < fIxmin) fIxmax=fIxmin; | |
199 | if (fIymax < fIymin) fIymax=fIymin; | |
200 | fIx=fIxmin; | |
201 | fIy=fIymin; | |
202 | ||
203 | GetPadC(fIx,fIy,fX,fY); | |
204 | fSector=Sector(fIx,fIy); | |
205 | // printf("\n \n First Pad: %d %d %f %f %d %d %d %f" , | |
206 | // fIxmin, fIxmax, fXmin, fXmax, fNpx, fId, isec, Dpy(isec)); | |
207 | // printf("\n \n First Pad: %d %d %f %f %d %d %d %f", | |
208 | // fIymin, fIymax, fYmin, fYmax, fNpy, fId, isec, Dpy(isec)); | |
209 | } | |
210 | ||
211 | void AliMUONSegmentationSlatModule::NextPad() | |
212 | { | |
213 | // Stepper for the iteration over pads | |
214 | // | |
215 | // Step to next pad in the integration region | |
216 | // step from left to right | |
217 | if (fIx != fIxmax) { | |
218 | fIx++; | |
219 | GetPadC(fIx,fIy,fX,fY); | |
220 | fSector=Sector(fIx,fIy); | |
221 | // step up | |
222 | } else if (fIy != fIymax) { | |
223 | fIx=fIxmin; | |
224 | fIy++; | |
225 | GetPadC(fIx,fIy,fX,fY); | |
226 | fSector=Sector(fIx,fIy); | |
227 | ||
228 | } else { | |
229 | fIx=-1; | |
230 | fIy=-1; | |
231 | } | |
232 | // printf("\n Next Pad %d %d %f %f %d %d %d %d %d ", | |
233 | } | |
234 | ||
235 | ||
236 | Int_t AliMUONSegmentationSlatModule::MorePads() | |
237 | // Stopping condition for the iterator over pads | |
238 | // | |
239 | // Are there more pads in the integration region | |
240 | { | |
241 | ||
242 | return (fIx != -1 || fIy != -1); | |
243 | } | |
244 | ||
245 | ||
246 | Int_t AliMUONSegmentationSlatModule::Sector(Int_t ix, Int_t iy) | |
247 | { | |
248 | // | |
249 | // Determine segmentation zone from pad coordinates | |
250 | // | |
251 | Int_t isec=-1; | |
252 | for (Int_t i=0; i < fNsec; i++) { | |
253 | if (ix <= fNpxS[i]) { | |
254 | isec=i; | |
255 | break; | |
256 | } | |
257 | } | |
258 | if (isec == -1) printf("\n Sector: Attention isec ! %d %d %d %d \n", | |
259 | fId, ix, iy,fNpxS[3]); | |
260 | ||
261 | return isec; | |
262 | ||
263 | } | |
264 | ||
265 | void AliMUONSegmentationSlatModule:: | |
266 | IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2) | |
267 | { | |
268 | // Returns integration limits for current pad | |
269 | // | |
270 | ||
271 | x1=fXhit-fX-Dpx(fSector)/2.; | |
272 | x2=x1+Dpx(fSector); | |
273 | y1=fYhit-fY-Dpy(fSector)/2.; | |
274 | y2=y1+Dpy(fSector); | |
275 | // printf("\n Integration Limits %f %f %f %f %d %f", x1, x2, y1, y2, fSector, Dpx(fSector)); | |
276 | ||
277 | } | |
278 | ||
279 | void AliMUONSegmentationSlatModule:: | |
280 | Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10]) | |
281 | { | |
282 | // Returns list of next neighbours for given Pad (iX, iY) | |
283 | // | |
284 | // | |
285 | Int_t i=0; | |
286 | // | |
287 | // step right | |
288 | if (iX+1 <= fNpx) { | |
289 | Xlist[i]=iX+1; | |
290 | Ylist[i++]=iY; | |
291 | } | |
292 | // | |
293 | // step left | |
294 | if (iX-1 > 0) { | |
295 | Xlist[i]=iX-1; | |
296 | Ylist[i++]=iY; | |
297 | } | |
298 | ||
299 | // | |
300 | // step up | |
301 | if (iY+1 <= fNpy) { | |
302 | Xlist[i]=iX; | |
303 | Ylist[i++]=iY+1; | |
304 | } | |
305 | // | |
306 | // step down | |
307 | if (iY-1 > 0) { | |
308 | Xlist[i]=iX; | |
309 | Ylist[i++]=iY-1; | |
310 | } | |
311 | ||
312 | *Nlist=i; | |
313 | } | |
314 | ||
315 | ||
316 | void AliMUONSegmentationSlatModule::Init(Int_t chamber) | |
317 | { | |
318 | printf("\n Initialise segmentation SlatModule \n"); | |
319 | // | |
320 | // Fill the arrays fCx (x-contour) and fNpxS (ix-contour) for each sector | |
321 | // These arrays help in converting from real to pad co-ordinates and | |
322 | // vice versa | |
323 | // | |
324 | // Segmentation is defined by rectangular modules approximating | |
325 | // concentric circles as shown below | |
326 | // | |
327 | // PCB module size in cm | |
328 | fDxPCB=40; | |
329 | fDyPCB=40; | |
330 | // | |
331 | // number of pad rows per PCB | |
332 | // | |
333 | Int_t nPyPCB=Int_t(fDyPCB/fDpy); | |
334 | // | |
335 | // maximum number of pad rows | |
336 | fNpy=nPyPCB; | |
337 | // | |
338 | // Calculate padsize along x | |
339 | (*fDpxD)[fNsec-1]=fDpx; | |
340 | if (fNsec > 1) { | |
341 | for (Int_t i=fNsec-2; i>=0; i--){ | |
342 | (*fDpxD)[i]=(*fDpxD)[fNsec-1]/(*fNDiv)[i]; | |
343 | printf("\n test ---dx %d %f \n",i,(*fDpxD)[i]); | |
344 | } | |
345 | } | |
346 | // | |
347 | // fill the arrays defining the pad segmentation boundaries | |
348 | // | |
349 | // | |
350 | // Loop over sectors (isec=0 is the dead space surounding the beam pipe) | |
351 | for (Int_t isec=0; isec<4; isec++) { | |
352 | if (isec==0) { | |
353 | fNpxS[0] = 0; | |
354 | fNpyS[0] = 0; | |
355 | fCx[0] = 0; | |
356 | } else { | |
357 | fNpxS[isec]=fNpxS[isec-1] + fPcbBoards[isec]*Int_t(fDxPCB/(*fDpxD)[isec]); | |
358 | fNpyS[isec]=fNpy; | |
359 | fCx[isec]=fCx[isec-1] + fPcbBoards[isec]*fDxPCB; | |
360 | } | |
361 | } // sectors | |
362 | // maximum number of pad rows | |
363 | fNpy=nPyPCB; | |
364 | fNpx=fNpxS[3]; | |
365 | } | |
366 | ||
367 | ||
368 | ||
369 | ||
370 | ||
371 | ||
372 | ||
373 | ||
374 | ||
375 | ||
376 | ||
377 |