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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 | **************************************************************************/ | |
15 | /* | |
16 | $Log$ | |
ef42d733 | 17 | Revision 1.4 2000/07/03 11:54:57 morsch |
18 | AliMUONSegmentation and AliMUONHitMap have been replaced by AliSegmentation and AliHitMap in STEER | |
19 | The methods GetPadIxy and GetPadXxy of AliMUONSegmentation have changed name to GetPadI and GetPadC. | |
20 | ||
a30a000f | 21 | Revision 1.3 2000/06/29 12:34:09 morsch |
22 | AliMUONSegmentation class has been made independent of AliMUONChamber. This makes | |
23 | it usable with any other geometry class. The link to the object to which it belongs is | |
24 | established via an index. This assumes that there exists a global geometry manager | |
25 | from which the pointer to the parent object can be obtained (in our case gAlice). | |
26 | ||
d81db581 | 27 | Revision 1.2 2000/06/15 07:58:48 morsch |
28 | Code from MUON-dev joined | |
29 | ||
a9e2aefa | 30 | Revision 1.1.2.2 2000/06/12 07:57:23 morsch |
31 | include TMath.h | |
32 | ||
33 | Revision 1.1.2.1 2000/06/09 21:30:33 morsch | |
34 | AliMUONSegmentationV0 code from AliMUONSegResV0.cxx | |
35 | ||
36 | */ | |
37 | ||
38 | #include "AliMUONSegmentationV0.h" | |
39 | #include "TArc.h" | |
40 | #include "TMath.h" | |
41 | #include "AliMUONChamber.h" | |
d81db581 | 42 | #include "AliRun.h" |
43 | #include "AliMUON.h" | |
a9e2aefa | 44 | |
45 | ClassImp(AliMUONSegmentationV0) | |
46 | AliMUONSegmentationV0::AliMUONSegmentationV0(const AliMUONSegmentationV0& segmentation) | |
47 | { | |
48 | // Dummy copy constructor | |
49 | } | |
50 | ||
d81db581 | 51 | void AliMUONSegmentationV0::Init(Int_t chamber) |
a9e2aefa | 52 | { |
53 | // Initialises member data of the segmentation from geometry data | |
54 | // owned by Chamber | |
55 | // | |
d81db581 | 56 | AliMUON *pMUON = (AliMUON *) gAlice->GetModule("MUON"); |
57 | AliMUONChamber* iChamber=&(pMUON->Chamber(chamber)); | |
58 | ||
a9e2aefa | 59 | // Initialise maximum number of pads in x ans y |
d81db581 | 60 | fNpx=(Int_t) (iChamber->ROuter()/fDpx+1); |
61 | fNpy=(Int_t) (iChamber->ROuter()/fDpy+1); | |
a9e2aefa | 62 | // Initialize inner and outer radius of the sensitive region |
d81db581 | 63 | fRmin=iChamber->RInner(); |
64 | fRmax=iChamber->ROuter(); | |
a9e2aefa | 65 | fCorr=0; |
66 | ||
67 | } | |
68 | ||
69 | ||
70 | Float_t AliMUONSegmentationV0::GetAnod(Float_t xhit) | |
71 | { | |
72 | // Returns for a hit position xhit the position of the nearest anode wire | |
73 | Float_t wire= (xhit>0)? Int_t(xhit/fWireD)+0.5:Int_t(xhit/fWireD)-0.5; | |
74 | return fWireD*wire; | |
75 | } | |
76 | ||
77 | void AliMUONSegmentationV0::SetPadSize(Float_t p1, Float_t p2) | |
78 | { | |
79 | // Sets the padsize | |
80 | // | |
81 | fDpx=p1; | |
82 | fDpy=p2; | |
83 | } | |
84 | void AliMUONSegmentationV0:: | |
a30a000f | 85 | GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy) |
a9e2aefa | 86 | { |
87 | // Returns pad coordinates (ix,iy) for given real coordinates (x,y) | |
88 | // | |
89 | ix = (x>0)? Int_t(x/fDpx)+1 : Int_t(x/fDpx)-1; | |
90 | iy = (y>0)? Int_t(y/fDpy)+1 : Int_t(y/fDpy)-1; | |
91 | if (iy > fNpy) iy= fNpy; | |
92 | if (iy < -fNpy) iy=-fNpy; | |
93 | if (ix > fNpx) ix= fNpx; | |
94 | if (ix < -fNpx) ix=-fNpx; | |
95 | } | |
96 | void AliMUONSegmentationV0:: | |
a30a000f | 97 | GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y) |
a9e2aefa | 98 | { |
99 | // Returns real coordinates (x,y) for given pad coordinates (ix,iy) | |
100 | // | |
101 | // Comments and Critics: | |
102 | ||
103 | // The Pad(0,0) does not exist, this causes in the present version errors | |
104 | // during iteration when used with hits close to zero. | |
105 | // Since we have frame crosses at x=0 or y=0 this does not cause any problems | |
106 | // Nevertheless, should be corrected in the next version !! | |
107 | // The name fRmin is misleading although we use this version with | |
108 | // a circular chamber geometry. | |
109 | ||
110 | x = (ix>0) ? Float_t(ix*fDpx)-fDpx/2. : Float_t(ix*fDpx)+fDpx/2.; | |
111 | y = (iy>0) ? Float_t(iy*fDpy)-fDpy/2. : Float_t(iy*fDpy)+fDpy/2.; | |
112 | } | |
113 | ||
114 | void AliMUONSegmentationV0:: | |
115 | SetHit(Float_t xhit, Float_t yhit) | |
116 | { | |
117 | // | |
118 | // Sets virtual hit position, needed for evaluating pad response | |
119 | // outside the tracking program | |
120 | fxhit=xhit; | |
121 | fyhit=yhit; | |
122 | } | |
123 | ||
124 | void AliMUONSegmentationV0:: | |
125 | SetPad(Int_t ix, Int_t iy) | |
126 | { | |
127 | // | |
128 | // Sets virtual pad coordinates, needed for evaluating pad response | |
129 | // outside the tracking program | |
a30a000f | 130 | GetPadC(ix,iy,fx,fy); |
a9e2aefa | 131 | } |
132 | ||
133 | void AliMUONSegmentationV0:: | |
134 | FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy) | |
135 | { | |
136 | // Initialises iteration over pads for charge distribution algorithm | |
137 | // | |
138 | // | |
139 | // Find the wire position (center of charge distribution) | |
140 | Float_t x0a=GetAnod(xhit); | |
141 | fxhit=x0a; | |
142 | fyhit=yhit; | |
143 | // | |
144 | // and take fNsigma*sigma around this center | |
145 | Float_t x01=x0a - dx; | |
146 | Float_t x02=x0a + dx; | |
147 | Float_t y01=yhit - dy; | |
148 | Float_t y02=yhit + dy; | |
149 | // | |
150 | // find the pads over which the charge distributes | |
a30a000f | 151 | GetPadI(x01,y01,fixmin,fiymin); |
152 | GetPadI(x02,y02,fixmax,fiymax); | |
a9e2aefa | 153 | // |
154 | // Set current pad to lower left corner | |
155 | fix=fixmin; | |
156 | fiy=fiymin; | |
a30a000f | 157 | GetPadC(fix,fiy,fx,fy); |
a9e2aefa | 158 | } |
159 | ||
160 | void AliMUONSegmentationV0::NextPad() | |
161 | { | |
162 | // Stepper for the iteration over pads | |
163 | // | |
164 | // Comments and Critics: | |
165 | // Boundary crossing at x=0 or y=0 not correctly handled ! | |
166 | // Step to next pad in the integration region | |
167 | if (fix != fixmax) { | |
168 | if (fix==-1) fix++; | |
169 | fix++; | |
170 | } else if (fiy != fiymax) { | |
171 | fix=fixmin; | |
172 | if (fiy==-1) fiy++; | |
173 | fiy++; | |
174 | } else { | |
175 | printf("\n Error: Stepping outside integration region\n "); | |
176 | } | |
a30a000f | 177 | GetPadC(fix,fiy,fx,fy); |
a9e2aefa | 178 | } |
179 | ||
180 | Int_t AliMUONSegmentationV0::MorePads() | |
181 | // Stopping condition for the iterator over pads | |
182 | // | |
183 | // Are there more pads in the integration region ? | |
184 | { | |
185 | if (fix == fixmax && fiy == fiymax) { | |
186 | return 0; | |
187 | } else { | |
188 | return 1; | |
189 | ||
190 | } | |
191 | } | |
192 | ||
193 | void AliMUONSegmentationV0::SigGenInit(Float_t x,Float_t y,Float_t z) | |
194 | { | |
195 | // | |
196 | // Initialises pad and wire position during stepping | |
197 | fxt =x; | |
198 | fyt =y; | |
a30a000f | 199 | GetPadI(x,y,fixt,fiyt); |
a9e2aefa | 200 | fiwt= (x>0) ? Int_t(x/fWireD)+1 : Int_t(x/fWireD)-1 ; |
201 | } | |
202 | ||
203 | Int_t AliMUONSegmentationV0::SigGenCond(Float_t x,Float_t y,Float_t z) | |
204 | { | |
205 | // Signal generation condition during stepping | |
206 | // 0: don't generate signal | |
207 | // 1: generate signal | |
208 | // Comments and critics: | |
209 | ||
210 | // Crossing of pad boundary and mid plane between neighbouring wires is checked. | |
211 | // To correctly simulate the dependence of the spatial resolution on the angle | |
212 | // of incidence signal must be generated for constant steps on | |
213 | // the projection of the trajectory along the anode wire. | |
214 | ||
215 | // | |
216 | // Signal will be generated if particle crosses pad boundary or | |
217 | // boundary between two wires. | |
218 | Int_t ixt, iyt; | |
a30a000f | 219 | GetPadI(x,y,ixt,iyt); |
a9e2aefa | 220 | Int_t iwt=(x>0) ? Int_t(x/fWireD)+1 : Int_t(x/fWireD)-1; |
221 | if ((ixt != fixt) || (iyt !=fiyt) || (iwt != fiwt)) { | |
222 | return 1; | |
223 | } else { | |
224 | return 0; | |
225 | } | |
226 | } | |
227 | void AliMUONSegmentationV0:: | |
228 | IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2) | |
229 | { | |
230 | // Returns integration limits for current pad | |
231 | // | |
232 | x1=fxhit-fx-fDpx/2.; | |
233 | x2=x1+fDpx; | |
234 | y1=fyhit-fy-fDpy/2.; | |
235 | y2=y1+fDpy; | |
236 | } | |
237 | ||
238 | void AliMUONSegmentationV0:: | |
239 | Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10]) | |
240 | { | |
241 | // Returns list of next neighbours for given Pad (iX, iY) | |
242 | // | |
243 | // Comments and critics | |
244 | // "Diagonal" neighbours are not passed | |
245 | // Is this ok when we search for local maxima ?? | |
246 | // No test whether neighbours have valid indices id performed | |
247 | *Nlist=4; | |
248 | Xlist[0]=Xlist[1]=iX; | |
249 | Xlist[2]=iX-1; | |
250 | Xlist[3]=iX+1; | |
251 | Ylist[0]=iY-1; | |
252 | Ylist[1]=iY+1; | |
253 | Ylist[2]=Ylist[3]=iY; | |
254 | } | |
255 | ||
256 | Float_t AliMUONSegmentationV0::Distance2AndOffset(Int_t iX, Int_t iY, Float_t X, Float_t Y | |
257 | , Int_t *dummy) | |
258 | // Returns the square of the distance between 1 pad | |
259 | // labelled by its Channel numbers and a coordinate | |
260 | { | |
261 | Float_t x,y; | |
a30a000f | 262 | GetPadC(iX,iY,x,y); |
a9e2aefa | 263 | return (x-X)*(x-X) + (y-Y)*(y-Y); |
264 | } | |
265 | ||
266 | ||
267 | void AliMUONSegmentationV0::GiveTestPoints(Int_t &n, Float_t *x, Float_t *y) | |
268 | { | |
269 | // Returns test point on the pad plane. | |
270 | // Used during determination of the segmoid correction of the COG-method | |
271 | n=1; | |
272 | x[0]=(fRmax+fRmin)/2/TMath::Sqrt(2.); | |
273 | y[0]=x[0]; | |
274 | } | |
275 | ||
ef42d733 | 276 | void AliMUONSegmentationV0::Draw(const char *) |
a9e2aefa | 277 | { |
278 | // Draws the segmentation zones | |
279 | // | |
280 | TArc *circle; | |
281 | Float_t scale=0.95/fRmax/2.; | |
282 | ||
283 | ||
284 | circle = new TArc(0.5,0.5,fRmax*scale,0.,360.); | |
285 | circle->SetFillColor(2); | |
286 | circle->Draw(); | |
287 | ||
288 | circle = new TArc(0.5,0.5,fRmin*scale,0.,360.); | |
289 | circle->SetFillColor(1); | |
290 | circle->Draw(); | |
291 | } | |
292 | ||
293 | AliMUONSegmentationV0& AliMUONSegmentationV0::operator =(const AliMUONSegmentationV0 & rhs) | |
294 | { | |
295 | // Dummy assignment operator | |
296 | return *this; | |
297 | } |