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a9e2aefa | 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 | **************************************************************************/ | |
de05461e | 15 | |
88cb7938 | 16 | /* $Id$ */ |
a9e2aefa | 17 | |
30178c30 | 18 | #include <TArc.h> |
19 | #include <TMath.h> | |
20 | ||
a9e2aefa | 21 | #include "AliMUONSegmentationV0.h" |
a9e2aefa | 22 | #include "AliMUONChamber.h" |
d81db581 | 23 | #include "AliRun.h" |
24 | #include "AliMUON.h" | |
8c343c7c | 25 | #include "AliLog.h" |
a9e2aefa | 26 | |
27 | ClassImp(AliMUONSegmentationV0) | |
30178c30 | 28 | |
29 | AliMUONSegmentationV0::AliMUONSegmentationV0() | |
30 | : AliSegmentation() | |
3bf5e9a0 | 31 | { |
30178c30 | 32 | fCorr=0; |
33 | fChamber=0; | |
34 | } | |
35 | ||
36 | AliMUONSegmentationV0::AliMUONSegmentationV0(const AliMUONSegmentationV0& segmentation) | |
37 | : AliSegmentation(segmentation) | |
38 | { | |
39 | // Protected copy constructor | |
40 | ||
8c343c7c | 41 | AliFatal("Not implemented."); |
3bf5e9a0 | 42 | } |
a9e2aefa | 43 | |
c9d10ab5 | 44 | |
45 | /* | |
46 | // Commented out - not used | |
47 | ||
48 | void AliMUONSegmentationV0::Init(Int_t chamber) | |
a9e2aefa | 49 | { |
50 | // Initialises member data of the segmentation from geometry data | |
51 | // owned by Chamber | |
52 | // | |
c9d10ab5 | 53 | |
d81db581 | 54 | AliMUON *pMUON = (AliMUON *) gAlice->GetModule("MUON"); |
3e1872ed | 55 | fChamber=&(pMUON->Chamber(chamber)); |
d81db581 | 56 | |
a9e2aefa | 57 | // Initialise maximum number of pads in x ans y |
3e1872ed | 58 | fNpx=(Int_t) (fChamber->ROuter()/fDpx+1); |
59 | fNpy=(Int_t) (fChamber->ROuter()/fDpy+1); | |
a9e2aefa | 60 | // Initialize inner and outer radius of the sensitive region |
3e1872ed | 61 | fRmin=fChamber->RInner(); |
62 | fRmax=fChamber->ROuter(); | |
a9e2aefa | 63 | fCorr=0; |
3e1872ed | 64 | fZ=fChamber->Z(); |
aaf4addd | 65 | fId=chamber; |
a9e2aefa | 66 | } |
c9d10ab5 | 67 | */ |
a9e2aefa | 68 | |
c3eff6ad | 69 | Float_t AliMUONSegmentationV0::GetAnod(Float_t xhit) const |
a9e2aefa | 70 | { |
71 | // Returns for a hit position xhit the position of the nearest anode wire | |
72 | Float_t wire= (xhit>0)? Int_t(xhit/fWireD)+0.5:Int_t(xhit/fWireD)-0.5; | |
73 | return fWireD*wire; | |
74 | } | |
f2ba3c26 | 75 | //____________________________________________________________________________ |
76 | void AliMUONSegmentationV0::GetNParallelAndOffset(Int_t /*iX*/, Int_t /*iY*/, Int_t *Nparallel, Int_t *Offset) | |
77 | { | |
78 | *Nparallel=1; | |
79 | *Offset=0; | |
80 | } | |
81 | ||
a9e2aefa | 82 | |
f2ba3c26 | 83 | //____________________________________________________________________________ |
84 | void AliMUONSegmentationV0::GetPadI(Float_t x, Float_t y , Float_t /*z*/, Int_t &ix, Int_t &iy) | |
85 | { | |
86 | GetPadI(x, y, ix, iy); | |
87 | } | |
88 | //____________________________________________________________________________ | |
89 | void AliMUONSegmentationV0::SetCorrFunc(Int_t /*dum*/, TF1* func) | |
90 | { | |
91 | fCorr=func; | |
92 | } | |
93 | //____________________________________________________________________________ | |
94 | Int_t AliMUONSegmentationV0::Sector(Int_t /*ix*/, Int_t /*iy*/) | |
95 | { | |
96 | return 1; | |
97 | } | |
98 | //____________________________________________________________________________ | |
99 | Int_t AliMUONSegmentationV0::Sector(Float_t /*x*/, Float_t /*y*/) | |
100 | { | |
101 | return 1; | |
102 | } | |
103 | //____________________________________________________________________________ | |
a9e2aefa | 104 | void AliMUONSegmentationV0::SetPadSize(Float_t p1, Float_t p2) |
105 | { | |
106 | // Sets the padsize | |
107 | // | |
108 | fDpx=p1; | |
109 | fDpy=p2; | |
110 | } | |
c3eff6ad | 111 | |
a9e2aefa | 112 | void AliMUONSegmentationV0:: |
c3eff6ad | 113 | GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy) |
a9e2aefa | 114 | { |
115 | // Returns pad coordinates (ix,iy) for given real coordinates (x,y) | |
116 | // | |
117 | ix = (x>0)? Int_t(x/fDpx)+1 : Int_t(x/fDpx)-1; | |
118 | iy = (y>0)? Int_t(y/fDpy)+1 : Int_t(y/fDpy)-1; | |
119 | if (iy > fNpy) iy= fNpy; | |
120 | if (iy < -fNpy) iy=-fNpy; | |
121 | if (ix > fNpx) ix= fNpx; | |
122 | if (ix < -fNpx) ix=-fNpx; | |
123 | } | |
c3eff6ad | 124 | |
a9e2aefa | 125 | void AliMUONSegmentationV0:: |
c3eff6ad | 126 | GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y) |
a9e2aefa | 127 | { |
128 | // Returns real coordinates (x,y) for given pad coordinates (ix,iy) | |
129 | // | |
130 | // Comments and Critics: | |
131 | ||
132 | // The Pad(0,0) does not exist, this causes in the present version errors | |
133 | // during iteration when used with hits close to zero. | |
134 | // Since we have frame crosses at x=0 or y=0 this does not cause any problems | |
135 | // Nevertheless, should be corrected in the next version !! | |
136 | // The name fRmin is misleading although we use this version with | |
137 | // a circular chamber geometry. | |
138 | ||
139 | x = (ix>0) ? Float_t(ix*fDpx)-fDpx/2. : Float_t(ix*fDpx)+fDpx/2.; | |
140 | y = (iy>0) ? Float_t(iy*fDpy)-fDpy/2. : Float_t(iy*fDpy)+fDpy/2.; | |
141 | } | |
f2ba3c26 | 142 | //______________________________________________________________________ |
143 | void AliMUONSegmentationV0::SetHit(Float_t xhit, Float_t yhit) | |
a9e2aefa | 144 | { |
145 | // | |
146 | // Sets virtual hit position, needed for evaluating pad response | |
147 | // outside the tracking program | |
ecfa008b | 148 | fXhit=xhit; |
149 | fYhit=yhit; | |
a9e2aefa | 150 | } |
f2ba3c26 | 151 | //_______________________________________________________________________ |
152 | void AliMUONSegmentationV0::SetHit(Float_t xhit, Float_t yhit, Float_t /*zhit*/) | |
153 | { | |
154 | SetHit(xhit, yhit); | |
155 | } | |
156 | //_______________________________________________________________________ | |
157 | ||
a9e2aefa | 158 | |
159 | void AliMUONSegmentationV0:: | |
160 | SetPad(Int_t ix, Int_t iy) | |
161 | { | |
162 | // | |
163 | // Sets virtual pad coordinates, needed for evaluating pad response | |
164 | // outside the tracking program | |
ecfa008b | 165 | GetPadC(ix,iy,fX,fY); |
a9e2aefa | 166 | } |
f2ba3c26 | 167 | //____________________________________________________________________________________ |
168 | void AliMUONSegmentationV0::FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy) | |
a9e2aefa | 169 | { |
170 | // Initialises iteration over pads for charge distribution algorithm | |
171 | // | |
172 | // | |
173 | // Find the wire position (center of charge distribution) | |
174 | Float_t x0a=GetAnod(xhit); | |
ecfa008b | 175 | fXhit=x0a; |
176 | fYhit=yhit; | |
a9e2aefa | 177 | // |
178 | // and take fNsigma*sigma around this center | |
179 | Float_t x01=x0a - dx; | |
180 | Float_t x02=x0a + dx; | |
181 | Float_t y01=yhit - dy; | |
182 | Float_t y02=yhit + dy; | |
183 | // | |
184 | // find the pads over which the charge distributes | |
ecfa008b | 185 | GetPadI(x01,y01,fIxmin,fIymin); |
186 | GetPadI(x02,y02,fIxmax,fIymax); | |
a9e2aefa | 187 | // |
188 | // Set current pad to lower left corner | |
ecfa008b | 189 | fIx=fIxmin; |
190 | fIy=fIymin; | |
191 | GetPadC(fIx,fIy,fX,fY); | |
a9e2aefa | 192 | } |
f2ba3c26 | 193 | //________________________________________________________________________ |
194 | void AliMUONSegmentationV0::FirstPad(Float_t xhit, Float_t yhit, Float_t /*zhit*/, Float_t dx, Float_t dy) | |
195 | {FirstPad(xhit, yhit, dx, dy);} | |
196 | ||
a9e2aefa | 197 | |
198 | void AliMUONSegmentationV0::NextPad() | |
199 | { | |
200 | // Stepper for the iteration over pads | |
201 | // | |
202 | // Comments and Critics: | |
203 | // Boundary crossing at x=0 or y=0 not correctly handled ! | |
204 | // Step to next pad in the integration region | |
ecfa008b | 205 | if (fIx != fIxmax) { |
206 | if (fIx==-1) fIx++; | |
207 | fIx++; | |
208 | } else if (fIy != fIymax) { | |
209 | fIx=fIxmin; | |
210 | if (fIy==-1) fIy++; | |
211 | fIy++; | |
a9e2aefa | 212 | } else { |
213 | printf("\n Error: Stepping outside integration region\n "); | |
214 | } | |
ecfa008b | 215 | GetPadC(fIx,fIy,fX,fY); |
a9e2aefa | 216 | } |
217 | ||
218 | Int_t AliMUONSegmentationV0::MorePads() | |
de05461e | 219 | { |
a9e2aefa | 220 | // Stopping condition for the iterator over pads |
221 | // | |
222 | // Are there more pads in the integration region ? | |
de05461e | 223 | |
ecfa008b | 224 | if (fIx == fIxmax && fIy == fIymax) { |
a9e2aefa | 225 | return 0; |
226 | } else { | |
227 | return 1; | |
228 | ||
229 | } | |
230 | } | |
231 | ||
f2ba3c26 | 232 | void AliMUONSegmentationV0::SigGenInit(Float_t x,Float_t y,Float_t /*z*/) |
a9e2aefa | 233 | { |
234 | // | |
235 | // Initialises pad and wire position during stepping | |
ecfa008b | 236 | fXt =x; |
237 | fYt =y; | |
238 | GetPadI(x,y,fIxt,fIyt); | |
239 | fIwt= (x>0) ? Int_t(x/fWireD)+1 : Int_t(x/fWireD)-1 ; | |
a9e2aefa | 240 | } |
c3eff6ad | 241 | |
f2ba3c26 | 242 | Int_t AliMUONSegmentationV0::SigGenCond(Float_t x,Float_t y,Float_t /*z*/) |
a9e2aefa | 243 | { |
244 | // Signal generation condition during stepping | |
245 | // 0: don't generate signal | |
246 | // 1: generate signal | |
247 | // Comments and critics: | |
248 | ||
249 | // Crossing of pad boundary and mid plane between neighbouring wires is checked. | |
250 | // To correctly simulate the dependence of the spatial resolution on the angle | |
251 | // of incidence signal must be generated for constant steps on | |
252 | // the projection of the trajectory along the anode wire. | |
253 | ||
254 | // | |
255 | // Signal will be generated if particle crosses pad boundary or | |
256 | // boundary between two wires. | |
257 | Int_t ixt, iyt; | |
a30a000f | 258 | GetPadI(x,y,ixt,iyt); |
a9e2aefa | 259 | Int_t iwt=(x>0) ? Int_t(x/fWireD)+1 : Int_t(x/fWireD)-1; |
ecfa008b | 260 | if ((ixt != fIxt) || (iyt !=fIyt) || (iwt != fIwt)) { |
a9e2aefa | 261 | return 1; |
262 | } else { | |
263 | return 0; | |
264 | } | |
265 | } | |
266 | void AliMUONSegmentationV0:: | |
267 | IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2) | |
268 | { | |
269 | // Returns integration limits for current pad | |
270 | // | |
ecfa008b | 271 | x1=fXhit-fX-fDpx/2.; |
a9e2aefa | 272 | x2=x1+fDpx; |
ecfa008b | 273 | y1=fYhit-fY-fDpy/2.; |
a9e2aefa | 274 | y2=y1+fDpy; |
275 | } | |
276 | ||
277 | void AliMUONSegmentationV0:: | |
c3eff6ad | 278 | Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10]) |
a9e2aefa | 279 | { |
280 | // Returns list of next neighbours for given Pad (iX, iY) | |
281 | // | |
282 | // Comments and critics | |
283 | // "Diagonal" neighbours are not passed | |
284 | // Is this ok when we search for local maxima ?? | |
285 | // No test whether neighbours have valid indices id performed | |
286 | *Nlist=4; | |
287 | Xlist[0]=Xlist[1]=iX; | |
288 | Xlist[2]=iX-1; | |
289 | Xlist[3]=iX+1; | |
290 | Ylist[0]=iY-1; | |
291 | Ylist[1]=iY+1; | |
292 | Ylist[2]=Ylist[3]=iY; | |
293 | } | |
294 | ||
295 | Float_t AliMUONSegmentationV0::Distance2AndOffset(Int_t iX, Int_t iY, Float_t X, Float_t Y | |
f2ba3c26 | 296 | , Int_t * /*dummy*/) |
de05461e | 297 | { |
a9e2aefa | 298 | // Returns the square of the distance between 1 pad |
299 | // labelled by its Channel numbers and a coordinate | |
de05461e | 300 | |
a9e2aefa | 301 | Float_t x,y; |
a30a000f | 302 | GetPadC(iX,iY,x,y); |
a9e2aefa | 303 | return (x-X)*(x-X) + (y-Y)*(y-Y); |
304 | } | |
305 | ||
306 | ||
c3eff6ad | 307 | void AliMUONSegmentationV0::GiveTestPoints(Int_t &n, Float_t *x, Float_t *y) const |
a9e2aefa | 308 | { |
309 | // Returns test point on the pad plane. | |
310 | // Used during determination of the segmoid correction of the COG-method | |
311 | n=1; | |
312 | x[0]=(fRmax+fRmin)/2/TMath::Sqrt(2.); | |
313 | y[0]=x[0]; | |
314 | } | |
315 | ||
c9d10ab5 | 316 | /* |
317 | // Commented out - not used | |
318 | ||
1373d50f | 319 | void AliMUONSegmentationV0::Draw(const char *) |
a9e2aefa | 320 | { |
321 | // Draws the segmentation zones | |
322 | // | |
323 | TArc *circle; | |
324 | Float_t scale=0.95/fRmax/2.; | |
325 | ||
326 | ||
327 | circle = new TArc(0.5,0.5,fRmax*scale,0.,360.); | |
328 | circle->SetFillColor(2); | |
329 | circle->Draw(); | |
330 | ||
331 | circle = new TArc(0.5,0.5,fRmin*scale,0.,360.); | |
332 | circle->SetFillColor(1); | |
333 | circle->Draw(); | |
334 | } | |
c9d10ab5 | 335 | */ |
a9e2aefa | 336 | |
30178c30 | 337 | AliMUONSegmentationV0& |
338 | AliMUONSegmentationV0::operator =(const AliMUONSegmentationV0 & rhs) | |
a9e2aefa | 339 | { |
30178c30 | 340 | // Protected assignement operator |
341 | ||
342 | if (this == &rhs) return *this; | |
343 | ||
8c343c7c | 344 | AliFatal("Not implemented."); |
30178c30 | 345 | |
346 | return *this; | |
a9e2aefa | 347 | } |