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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 | $Log$ | |
c3eff6ad | 17 | Revision 1.6 2000/10/02 16:58:29 egangler |
18 | Cleaning of the code : | |
19 | -> coding conventions | |
20 | -> void Streamers | |
21 | -> some useless includes removed or replaced by "class" statement | |
22 | ||
ecfa008b | 23 | Revision 1.5 2000/07/13 16:19:44 fca |
24 | Mainly coding conventions + some small bug fixes | |
25 | ||
ef42d733 | 26 | Revision 1.4 2000/07/03 11:54:57 morsch |
27 | AliMUONSegmentation and AliMUONHitMap have been replaced by AliSegmentation and AliHitMap in STEER | |
28 | The methods GetPadIxy and GetPadXxy of AliMUONSegmentation have changed name to GetPadI and GetPadC. | |
29 | ||
a30a000f | 30 | Revision 1.3 2000/06/29 12:34:09 morsch |
31 | AliMUONSegmentation class has been made independent of AliMUONChamber. This makes | |
32 | it usable with any other geometry class. The link to the object to which it belongs is | |
33 | established via an index. This assumes that there exists a global geometry manager | |
34 | from which the pointer to the parent object can be obtained (in our case gAlice). | |
35 | ||
d81db581 | 36 | Revision 1.2 2000/06/15 07:58:48 morsch |
37 | Code from MUON-dev joined | |
38 | ||
a9e2aefa | 39 | Revision 1.1.2.2 2000/06/12 07:57:23 morsch |
40 | include TMath.h | |
41 | ||
42 | Revision 1.1.2.1 2000/06/09 21:30:33 morsch | |
43 | AliMUONSegmentationV0 code from AliMUONSegResV0.cxx | |
44 | ||
45 | */ | |
46 | ||
47 | #include "AliMUONSegmentationV0.h" | |
48 | #include "TArc.h" | |
49 | #include "TMath.h" | |
50 | #include "AliMUONChamber.h" | |
d81db581 | 51 | #include "AliRun.h" |
52 | #include "AliMUON.h" | |
a9e2aefa | 53 | |
54 | ClassImp(AliMUONSegmentationV0) | |
55 | AliMUONSegmentationV0::AliMUONSegmentationV0(const AliMUONSegmentationV0& segmentation) | |
56 | { | |
57 | // Dummy copy constructor | |
58 | } | |
59 | ||
d81db581 | 60 | void AliMUONSegmentationV0::Init(Int_t chamber) |
a9e2aefa | 61 | { |
62 | // Initialises member data of the segmentation from geometry data | |
63 | // owned by Chamber | |
64 | // | |
d81db581 | 65 | AliMUON *pMUON = (AliMUON *) gAlice->GetModule("MUON"); |
66 | AliMUONChamber* iChamber=&(pMUON->Chamber(chamber)); | |
67 | ||
a9e2aefa | 68 | // Initialise maximum number of pads in x ans y |
d81db581 | 69 | fNpx=(Int_t) (iChamber->ROuter()/fDpx+1); |
70 | fNpy=(Int_t) (iChamber->ROuter()/fDpy+1); | |
a9e2aefa | 71 | // Initialize inner and outer radius of the sensitive region |
d81db581 | 72 | fRmin=iChamber->RInner(); |
73 | fRmax=iChamber->ROuter(); | |
a9e2aefa | 74 | fCorr=0; |
a9e2aefa | 75 | } |
76 | ||
77 | ||
c3eff6ad | 78 | Float_t AliMUONSegmentationV0::GetAnod(Float_t xhit) const |
a9e2aefa | 79 | { |
80 | // Returns for a hit position xhit the position of the nearest anode wire | |
81 | Float_t wire= (xhit>0)? Int_t(xhit/fWireD)+0.5:Int_t(xhit/fWireD)-0.5; | |
82 | return fWireD*wire; | |
83 | } | |
84 | ||
85 | void AliMUONSegmentationV0::SetPadSize(Float_t p1, Float_t p2) | |
86 | { | |
87 | // Sets the padsize | |
88 | // | |
89 | fDpx=p1; | |
90 | fDpy=p2; | |
91 | } | |
c3eff6ad | 92 | |
a9e2aefa | 93 | void AliMUONSegmentationV0:: |
c3eff6ad | 94 | GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy) |
a9e2aefa | 95 | { |
96 | // Returns pad coordinates (ix,iy) for given real coordinates (x,y) | |
97 | // | |
98 | ix = (x>0)? Int_t(x/fDpx)+1 : Int_t(x/fDpx)-1; | |
99 | iy = (y>0)? Int_t(y/fDpy)+1 : Int_t(y/fDpy)-1; | |
100 | if (iy > fNpy) iy= fNpy; | |
101 | if (iy < -fNpy) iy=-fNpy; | |
102 | if (ix > fNpx) ix= fNpx; | |
103 | if (ix < -fNpx) ix=-fNpx; | |
104 | } | |
c3eff6ad | 105 | |
a9e2aefa | 106 | void AliMUONSegmentationV0:: |
c3eff6ad | 107 | GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y) |
a9e2aefa | 108 | { |
109 | // Returns real coordinates (x,y) for given pad coordinates (ix,iy) | |
110 | // | |
111 | // Comments and Critics: | |
112 | ||
113 | // The Pad(0,0) does not exist, this causes in the present version errors | |
114 | // during iteration when used with hits close to zero. | |
115 | // Since we have frame crosses at x=0 or y=0 this does not cause any problems | |
116 | // Nevertheless, should be corrected in the next version !! | |
117 | // The name fRmin is misleading although we use this version with | |
118 | // a circular chamber geometry. | |
119 | ||
120 | x = (ix>0) ? Float_t(ix*fDpx)-fDpx/2. : Float_t(ix*fDpx)+fDpx/2.; | |
121 | y = (iy>0) ? Float_t(iy*fDpy)-fDpy/2. : Float_t(iy*fDpy)+fDpy/2.; | |
122 | } | |
123 | ||
124 | void AliMUONSegmentationV0:: | |
125 | SetHit(Float_t xhit, Float_t yhit) | |
126 | { | |
127 | // | |
128 | // Sets virtual hit position, needed for evaluating pad response | |
129 | // outside the tracking program | |
ecfa008b | 130 | fXhit=xhit; |
131 | fYhit=yhit; | |
a9e2aefa | 132 | } |
133 | ||
134 | void AliMUONSegmentationV0:: | |
135 | SetPad(Int_t ix, Int_t iy) | |
136 | { | |
137 | // | |
138 | // Sets virtual pad coordinates, needed for evaluating pad response | |
139 | // outside the tracking program | |
ecfa008b | 140 | GetPadC(ix,iy,fX,fY); |
a9e2aefa | 141 | } |
142 | ||
143 | void AliMUONSegmentationV0:: | |
144 | FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy) | |
145 | { | |
146 | // Initialises iteration over pads for charge distribution algorithm | |
147 | // | |
148 | // | |
149 | // Find the wire position (center of charge distribution) | |
150 | Float_t x0a=GetAnod(xhit); | |
ecfa008b | 151 | fXhit=x0a; |
152 | fYhit=yhit; | |
a9e2aefa | 153 | // |
154 | // and take fNsigma*sigma around this center | |
155 | Float_t x01=x0a - dx; | |
156 | Float_t x02=x0a + dx; | |
157 | Float_t y01=yhit - dy; | |
158 | Float_t y02=yhit + dy; | |
159 | // | |
160 | // find the pads over which the charge distributes | |
ecfa008b | 161 | GetPadI(x01,y01,fIxmin,fIymin); |
162 | GetPadI(x02,y02,fIxmax,fIymax); | |
a9e2aefa | 163 | // |
164 | // Set current pad to lower left corner | |
ecfa008b | 165 | fIx=fIxmin; |
166 | fIy=fIymin; | |
167 | GetPadC(fIx,fIy,fX,fY); | |
a9e2aefa | 168 | } |
169 | ||
170 | void AliMUONSegmentationV0::NextPad() | |
171 | { | |
172 | // Stepper for the iteration over pads | |
173 | // | |
174 | // Comments and Critics: | |
175 | // Boundary crossing at x=0 or y=0 not correctly handled ! | |
176 | // Step to next pad in the integration region | |
ecfa008b | 177 | if (fIx != fIxmax) { |
178 | if (fIx==-1) fIx++; | |
179 | fIx++; | |
180 | } else if (fIy != fIymax) { | |
181 | fIx=fIxmin; | |
182 | if (fIy==-1) fIy++; | |
183 | fIy++; | |
a9e2aefa | 184 | } else { |
185 | printf("\n Error: Stepping outside integration region\n "); | |
186 | } | |
ecfa008b | 187 | GetPadC(fIx,fIy,fX,fY); |
a9e2aefa | 188 | } |
189 | ||
190 | Int_t AliMUONSegmentationV0::MorePads() | |
191 | // Stopping condition for the iterator over pads | |
192 | // | |
193 | // Are there more pads in the integration region ? | |
194 | { | |
ecfa008b | 195 | if (fIx == fIxmax && fIy == fIymax) { |
a9e2aefa | 196 | return 0; |
197 | } else { | |
198 | return 1; | |
199 | ||
200 | } | |
201 | } | |
202 | ||
203 | void AliMUONSegmentationV0::SigGenInit(Float_t x,Float_t y,Float_t z) | |
204 | { | |
205 | // | |
206 | // Initialises pad and wire position during stepping | |
ecfa008b | 207 | fXt =x; |
208 | fYt =y; | |
209 | GetPadI(x,y,fIxt,fIyt); | |
210 | fIwt= (x>0) ? Int_t(x/fWireD)+1 : Int_t(x/fWireD)-1 ; | |
a9e2aefa | 211 | } |
c3eff6ad | 212 | |
213 | Int_t AliMUONSegmentationV0::SigGenCond(Float_t x,Float_t y,Float_t z) | |
a9e2aefa | 214 | { |
215 | // Signal generation condition during stepping | |
216 | // 0: don't generate signal | |
217 | // 1: generate signal | |
218 | // Comments and critics: | |
219 | ||
220 | // Crossing of pad boundary and mid plane between neighbouring wires is checked. | |
221 | // To correctly simulate the dependence of the spatial resolution on the angle | |
222 | // of incidence signal must be generated for constant steps on | |
223 | // the projection of the trajectory along the anode wire. | |
224 | ||
225 | // | |
226 | // Signal will be generated if particle crosses pad boundary or | |
227 | // boundary between two wires. | |
228 | Int_t ixt, iyt; | |
a30a000f | 229 | GetPadI(x,y,ixt,iyt); |
a9e2aefa | 230 | Int_t iwt=(x>0) ? Int_t(x/fWireD)+1 : Int_t(x/fWireD)-1; |
ecfa008b | 231 | if ((ixt != fIxt) || (iyt !=fIyt) || (iwt != fIwt)) { |
a9e2aefa | 232 | return 1; |
233 | } else { | |
234 | return 0; | |
235 | } | |
236 | } | |
237 | void AliMUONSegmentationV0:: | |
238 | IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2) | |
239 | { | |
240 | // Returns integration limits for current pad | |
241 | // | |
ecfa008b | 242 | x1=fXhit-fX-fDpx/2.; |
a9e2aefa | 243 | x2=x1+fDpx; |
ecfa008b | 244 | y1=fYhit-fY-fDpy/2.; |
a9e2aefa | 245 | y2=y1+fDpy; |
246 | } | |
247 | ||
248 | void AliMUONSegmentationV0:: | |
c3eff6ad | 249 | Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10]) |
a9e2aefa | 250 | { |
251 | // Returns list of next neighbours for given Pad (iX, iY) | |
252 | // | |
253 | // Comments and critics | |
254 | // "Diagonal" neighbours are not passed | |
255 | // Is this ok when we search for local maxima ?? | |
256 | // No test whether neighbours have valid indices id performed | |
257 | *Nlist=4; | |
258 | Xlist[0]=Xlist[1]=iX; | |
259 | Xlist[2]=iX-1; | |
260 | Xlist[3]=iX+1; | |
261 | Ylist[0]=iY-1; | |
262 | Ylist[1]=iY+1; | |
263 | Ylist[2]=Ylist[3]=iY; | |
264 | } | |
265 | ||
266 | Float_t AliMUONSegmentationV0::Distance2AndOffset(Int_t iX, Int_t iY, Float_t X, Float_t Y | |
267 | , Int_t *dummy) | |
268 | // Returns the square of the distance between 1 pad | |
269 | // labelled by its Channel numbers and a coordinate | |
270 | { | |
271 | Float_t x,y; | |
a30a000f | 272 | GetPadC(iX,iY,x,y); |
a9e2aefa | 273 | return (x-X)*(x-X) + (y-Y)*(y-Y); |
274 | } | |
275 | ||
276 | ||
c3eff6ad | 277 | void AliMUONSegmentationV0::GiveTestPoints(Int_t &n, Float_t *x, Float_t *y) const |
a9e2aefa | 278 | { |
279 | // Returns test point on the pad plane. | |
280 | // Used during determination of the segmoid correction of the COG-method | |
281 | n=1; | |
282 | x[0]=(fRmax+fRmin)/2/TMath::Sqrt(2.); | |
283 | y[0]=x[0]; | |
284 | } | |
285 | ||
c3eff6ad | 286 | void AliMUONSegmentationV0::Draw(const char *) const |
a9e2aefa | 287 | { |
288 | // Draws the segmentation zones | |
289 | // | |
290 | TArc *circle; | |
291 | Float_t scale=0.95/fRmax/2.; | |
292 | ||
293 | ||
294 | circle = new TArc(0.5,0.5,fRmax*scale,0.,360.); | |
295 | circle->SetFillColor(2); | |
296 | circle->Draw(); | |
297 | ||
298 | circle = new TArc(0.5,0.5,fRmin*scale,0.,360.); | |
299 | circle->SetFillColor(1); | |
300 | circle->Draw(); | |
301 | } | |
302 | ||
303 | AliMUONSegmentationV0& AliMUONSegmentationV0::operator =(const AliMUONSegmentationV0 & rhs) | |
304 | { | |
305 | // Dummy assignment operator | |
306 | return *this; | |
307 | } |