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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" | |
a9e2aefa | 25 | |
26 | ClassImp(AliMUONSegmentationV0) | |
30178c30 | 27 | |
28 | AliMUONSegmentationV0::AliMUONSegmentationV0() | |
29 | : AliSegmentation() | |
3bf5e9a0 | 30 | { |
30178c30 | 31 | fCorr=0; |
32 | fChamber=0; | |
33 | } | |
34 | ||
35 | AliMUONSegmentationV0::AliMUONSegmentationV0(const AliMUONSegmentationV0& segmentation) | |
36 | : AliSegmentation(segmentation) | |
37 | { | |
38 | // Protected copy constructor | |
39 | ||
e516b01d | 40 | Fatal("AliMUONSegmentationV0", "Not implemented."); |
3bf5e9a0 | 41 | } |
a9e2aefa | 42 | |
c9d10ab5 | 43 | |
44 | /* | |
45 | // Commented out - not used | |
46 | ||
47 | void AliMUONSegmentationV0::Init(Int_t chamber) | |
a9e2aefa | 48 | { |
49 | // Initialises member data of the segmentation from geometry data | |
50 | // owned by Chamber | |
51 | // | |
c9d10ab5 | 52 | |
d81db581 | 53 | AliMUON *pMUON = (AliMUON *) gAlice->GetModule("MUON"); |
3e1872ed | 54 | fChamber=&(pMUON->Chamber(chamber)); |
d81db581 | 55 | |
a9e2aefa | 56 | // Initialise maximum number of pads in x ans y |
3e1872ed | 57 | fNpx=(Int_t) (fChamber->ROuter()/fDpx+1); |
58 | fNpy=(Int_t) (fChamber->ROuter()/fDpy+1); | |
a9e2aefa | 59 | // Initialize inner and outer radius of the sensitive region |
3e1872ed | 60 | fRmin=fChamber->RInner(); |
61 | fRmax=fChamber->ROuter(); | |
a9e2aefa | 62 | fCorr=0; |
3e1872ed | 63 | fZ=fChamber->Z(); |
aaf4addd | 64 | fId=chamber; |
a9e2aefa | 65 | } |
c9d10ab5 | 66 | */ |
a9e2aefa | 67 | |
c3eff6ad | 68 | Float_t AliMUONSegmentationV0::GetAnod(Float_t xhit) const |
a9e2aefa | 69 | { |
70 | // Returns for a hit position xhit the position of the nearest anode wire | |
71 | Float_t wire= (xhit>0)? Int_t(xhit/fWireD)+0.5:Int_t(xhit/fWireD)-0.5; | |
72 | return fWireD*wire; | |
73 | } | |
f2ba3c26 | 74 | //____________________________________________________________________________ |
75 | void AliMUONSegmentationV0::GetNParallelAndOffset(Int_t /*iX*/, Int_t /*iY*/, Int_t *Nparallel, Int_t *Offset) | |
76 | { | |
77 | *Nparallel=1; | |
78 | *Offset=0; | |
79 | } | |
80 | ||
a9e2aefa | 81 | |
f2ba3c26 | 82 | //____________________________________________________________________________ |
83 | void AliMUONSegmentationV0::GetPadI(Float_t x, Float_t y , Float_t /*z*/, Int_t &ix, Int_t &iy) | |
84 | { | |
85 | GetPadI(x, y, ix, iy); | |
86 | } | |
87 | //____________________________________________________________________________ | |
88 | void AliMUONSegmentationV0::SetCorrFunc(Int_t /*dum*/, TF1* func) | |
89 | { | |
90 | fCorr=func; | |
91 | } | |
92 | //____________________________________________________________________________ | |
93 | Int_t AliMUONSegmentationV0::Sector(Int_t /*ix*/, Int_t /*iy*/) | |
94 | { | |
95 | return 1; | |
96 | } | |
97 | //____________________________________________________________________________ | |
98 | Int_t AliMUONSegmentationV0::Sector(Float_t /*x*/, Float_t /*y*/) | |
99 | { | |
100 | return 1; | |
101 | } | |
102 | //____________________________________________________________________________ | |
a9e2aefa | 103 | void AliMUONSegmentationV0::SetPadSize(Float_t p1, Float_t p2) |
104 | { | |
105 | // Sets the padsize | |
106 | // | |
107 | fDpx=p1; | |
108 | fDpy=p2; | |
109 | } | |
c3eff6ad | 110 | |
a9e2aefa | 111 | void AliMUONSegmentationV0:: |
c3eff6ad | 112 | GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy) |
a9e2aefa | 113 | { |
114 | // Returns pad coordinates (ix,iy) for given real coordinates (x,y) | |
115 | // | |
116 | ix = (x>0)? Int_t(x/fDpx)+1 : Int_t(x/fDpx)-1; | |
117 | iy = (y>0)? Int_t(y/fDpy)+1 : Int_t(y/fDpy)-1; | |
118 | if (iy > fNpy) iy= fNpy; | |
119 | if (iy < -fNpy) iy=-fNpy; | |
120 | if (ix > fNpx) ix= fNpx; | |
121 | if (ix < -fNpx) ix=-fNpx; | |
122 | } | |
c3eff6ad | 123 | |
a9e2aefa | 124 | void AliMUONSegmentationV0:: |
c3eff6ad | 125 | GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y) |
a9e2aefa | 126 | { |
127 | // Returns real coordinates (x,y) for given pad coordinates (ix,iy) | |
128 | // | |
129 | // Comments and Critics: | |
130 | ||
131 | // The Pad(0,0) does not exist, this causes in the present version errors | |
132 | // during iteration when used with hits close to zero. | |
133 | // Since we have frame crosses at x=0 or y=0 this does not cause any problems | |
134 | // Nevertheless, should be corrected in the next version !! | |
135 | // The name fRmin is misleading although we use this version with | |
136 | // a circular chamber geometry. | |
137 | ||
138 | x = (ix>0) ? Float_t(ix*fDpx)-fDpx/2. : Float_t(ix*fDpx)+fDpx/2.; | |
139 | y = (iy>0) ? Float_t(iy*fDpy)-fDpy/2. : Float_t(iy*fDpy)+fDpy/2.; | |
140 | } | |
f2ba3c26 | 141 | //______________________________________________________________________ |
142 | void AliMUONSegmentationV0::SetHit(Float_t xhit, Float_t yhit) | |
a9e2aefa | 143 | { |
144 | // | |
145 | // Sets virtual hit position, needed for evaluating pad response | |
146 | // outside the tracking program | |
ecfa008b | 147 | fXhit=xhit; |
148 | fYhit=yhit; | |
a9e2aefa | 149 | } |
f2ba3c26 | 150 | //_______________________________________________________________________ |
151 | void AliMUONSegmentationV0::SetHit(Float_t xhit, Float_t yhit, Float_t /*zhit*/) | |
152 | { | |
153 | SetHit(xhit, yhit); | |
154 | } | |
155 | //_______________________________________________________________________ | |
156 | ||
a9e2aefa | 157 | |
158 | void AliMUONSegmentationV0:: | |
159 | SetPad(Int_t ix, Int_t iy) | |
160 | { | |
161 | // | |
162 | // Sets virtual pad coordinates, needed for evaluating pad response | |
163 | // outside the tracking program | |
ecfa008b | 164 | GetPadC(ix,iy,fX,fY); |
a9e2aefa | 165 | } |
f2ba3c26 | 166 | //____________________________________________________________________________________ |
167 | void AliMUONSegmentationV0::FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy) | |
a9e2aefa | 168 | { |
169 | // Initialises iteration over pads for charge distribution algorithm | |
170 | // | |
171 | // | |
172 | // Find the wire position (center of charge distribution) | |
173 | Float_t x0a=GetAnod(xhit); | |
ecfa008b | 174 | fXhit=x0a; |
175 | fYhit=yhit; | |
a9e2aefa | 176 | // |
177 | // and take fNsigma*sigma around this center | |
178 | Float_t x01=x0a - dx; | |
179 | Float_t x02=x0a + dx; | |
180 | Float_t y01=yhit - dy; | |
181 | Float_t y02=yhit + dy; | |
182 | // | |
183 | // find the pads over which the charge distributes | |
ecfa008b | 184 | GetPadI(x01,y01,fIxmin,fIymin); |
185 | GetPadI(x02,y02,fIxmax,fIymax); | |
a9e2aefa | 186 | // |
187 | // Set current pad to lower left corner | |
ecfa008b | 188 | fIx=fIxmin; |
189 | fIy=fIymin; | |
190 | GetPadC(fIx,fIy,fX,fY); | |
a9e2aefa | 191 | } |
f2ba3c26 | 192 | //________________________________________________________________________ |
193 | void AliMUONSegmentationV0::FirstPad(Float_t xhit, Float_t yhit, Float_t /*zhit*/, Float_t dx, Float_t dy) | |
194 | {FirstPad(xhit, yhit, dx, dy);} | |
195 | ||
a9e2aefa | 196 | |
197 | void AliMUONSegmentationV0::NextPad() | |
198 | { | |
199 | // Stepper for the iteration over pads | |
200 | // | |
201 | // Comments and Critics: | |
202 | // Boundary crossing at x=0 or y=0 not correctly handled ! | |
203 | // Step to next pad in the integration region | |
ecfa008b | 204 | if (fIx != fIxmax) { |
205 | if (fIx==-1) fIx++; | |
206 | fIx++; | |
207 | } else if (fIy != fIymax) { | |
208 | fIx=fIxmin; | |
209 | if (fIy==-1) fIy++; | |
210 | fIy++; | |
a9e2aefa | 211 | } else { |
212 | printf("\n Error: Stepping outside integration region\n "); | |
213 | } | |
ecfa008b | 214 | GetPadC(fIx,fIy,fX,fY); |
a9e2aefa | 215 | } |
216 | ||
217 | Int_t AliMUONSegmentationV0::MorePads() | |
de05461e | 218 | { |
a9e2aefa | 219 | // Stopping condition for the iterator over pads |
220 | // | |
221 | // Are there more pads in the integration region ? | |
de05461e | 222 | |
ecfa008b | 223 | if (fIx == fIxmax && fIy == fIymax) { |
a9e2aefa | 224 | return 0; |
225 | } else { | |
226 | return 1; | |
227 | ||
228 | } | |
229 | } | |
230 | ||
f2ba3c26 | 231 | void AliMUONSegmentationV0::SigGenInit(Float_t x,Float_t y,Float_t /*z*/) |
a9e2aefa | 232 | { |
233 | // | |
234 | // Initialises pad and wire position during stepping | |
ecfa008b | 235 | fXt =x; |
236 | fYt =y; | |
237 | GetPadI(x,y,fIxt,fIyt); | |
238 | fIwt= (x>0) ? Int_t(x/fWireD)+1 : Int_t(x/fWireD)-1 ; | |
a9e2aefa | 239 | } |
c3eff6ad | 240 | |
f2ba3c26 | 241 | Int_t AliMUONSegmentationV0::SigGenCond(Float_t x,Float_t y,Float_t /*z*/) |
a9e2aefa | 242 | { |
243 | // Signal generation condition during stepping | |
244 | // 0: don't generate signal | |
245 | // 1: generate signal | |
246 | // Comments and critics: | |
247 | ||
248 | // Crossing of pad boundary and mid plane between neighbouring wires is checked. | |
249 | // To correctly simulate the dependence of the spatial resolution on the angle | |
250 | // of incidence signal must be generated for constant steps on | |
251 | // the projection of the trajectory along the anode wire. | |
252 | ||
253 | // | |
254 | // Signal will be generated if particle crosses pad boundary or | |
255 | // boundary between two wires. | |
256 | Int_t ixt, iyt; | |
a30a000f | 257 | GetPadI(x,y,ixt,iyt); |
a9e2aefa | 258 | Int_t iwt=(x>0) ? Int_t(x/fWireD)+1 : Int_t(x/fWireD)-1; |
ecfa008b | 259 | if ((ixt != fIxt) || (iyt !=fIyt) || (iwt != fIwt)) { |
a9e2aefa | 260 | return 1; |
261 | } else { | |
262 | return 0; | |
263 | } | |
264 | } | |
265 | void AliMUONSegmentationV0:: | |
266 | IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2) | |
267 | { | |
268 | // Returns integration limits for current pad | |
269 | // | |
ecfa008b | 270 | x1=fXhit-fX-fDpx/2.; |
a9e2aefa | 271 | x2=x1+fDpx; |
ecfa008b | 272 | y1=fYhit-fY-fDpy/2.; |
a9e2aefa | 273 | y2=y1+fDpy; |
274 | } | |
275 | ||
276 | void AliMUONSegmentationV0:: | |
c3eff6ad | 277 | Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10]) |
a9e2aefa | 278 | { |
279 | // Returns list of next neighbours for given Pad (iX, iY) | |
280 | // | |
281 | // Comments and critics | |
282 | // "Diagonal" neighbours are not passed | |
283 | // Is this ok when we search for local maxima ?? | |
284 | // No test whether neighbours have valid indices id performed | |
285 | *Nlist=4; | |
286 | Xlist[0]=Xlist[1]=iX; | |
287 | Xlist[2]=iX-1; | |
288 | Xlist[3]=iX+1; | |
289 | Ylist[0]=iY-1; | |
290 | Ylist[1]=iY+1; | |
291 | Ylist[2]=Ylist[3]=iY; | |
292 | } | |
293 | ||
294 | Float_t AliMUONSegmentationV0::Distance2AndOffset(Int_t iX, Int_t iY, Float_t X, Float_t Y | |
f2ba3c26 | 295 | , Int_t * /*dummy*/) |
de05461e | 296 | { |
a9e2aefa | 297 | // Returns the square of the distance between 1 pad |
298 | // labelled by its Channel numbers and a coordinate | |
de05461e | 299 | |
a9e2aefa | 300 | Float_t x,y; |
a30a000f | 301 | GetPadC(iX,iY,x,y); |
a9e2aefa | 302 | return (x-X)*(x-X) + (y-Y)*(y-Y); |
303 | } | |
304 | ||
305 | ||
c3eff6ad | 306 | void AliMUONSegmentationV0::GiveTestPoints(Int_t &n, Float_t *x, Float_t *y) const |
a9e2aefa | 307 | { |
308 | // Returns test point on the pad plane. | |
309 | // Used during determination of the segmoid correction of the COG-method | |
310 | n=1; | |
311 | x[0]=(fRmax+fRmin)/2/TMath::Sqrt(2.); | |
312 | y[0]=x[0]; | |
313 | } | |
314 | ||
c9d10ab5 | 315 | /* |
316 | // Commented out - not used | |
317 | ||
1373d50f | 318 | void AliMUONSegmentationV0::Draw(const char *) |
a9e2aefa | 319 | { |
320 | // Draws the segmentation zones | |
321 | // | |
322 | TArc *circle; | |
323 | Float_t scale=0.95/fRmax/2.; | |
324 | ||
325 | ||
326 | circle = new TArc(0.5,0.5,fRmax*scale,0.,360.); | |
327 | circle->SetFillColor(2); | |
328 | circle->Draw(); | |
329 | ||
330 | circle = new TArc(0.5,0.5,fRmin*scale,0.,360.); | |
331 | circle->SetFillColor(1); | |
332 | circle->Draw(); | |
333 | } | |
c9d10ab5 | 334 | */ |
a9e2aefa | 335 | |
30178c30 | 336 | AliMUONSegmentationV0& |
337 | AliMUONSegmentationV0::operator =(const AliMUONSegmentationV0 & rhs) | |
a9e2aefa | 338 | { |
30178c30 | 339 | // Protected assignement operator |
340 | ||
341 | if (this == &rhs) return *this; | |
342 | ||
e516b01d | 343 | Fatal("operator=", "Not implemented."); |
30178c30 | 344 | |
345 | return *this; | |
a9e2aefa | 346 | } |