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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 | $Log$ | |
de05461e | 17 | Revision 1.9 2000/11/06 09:20:43 morsch |
18 | AliMUON delegates part of BuildGeometry() to AliMUONSegmentation using the | |
19 | Draw() method. This avoids code and parameter replication. | |
20 | ||
aaf4addd | 21 | Revision 1.8 2000/10/18 11:42:06 morsch |
22 | - AliMUONRawCluster contains z-position. | |
23 | - Some clean-up of useless print statements during initialisations. | |
24 | ||
3e1872ed | 25 | Revision 1.7 2000/10/03 21:48:07 morsch |
26 | Adopt to const declaration of some of the methods in AliSegmentation. | |
27 | ||
c3eff6ad | 28 | Revision 1.6 2000/10/02 16:58:29 egangler |
29 | Cleaning of the code : | |
30 | -> coding conventions | |
31 | -> void Streamers | |
32 | -> some useless includes removed or replaced by "class" statement | |
33 | ||
ecfa008b | 34 | Revision 1.5 2000/07/13 16:19:44 fca |
35 | Mainly coding conventions + some small bug fixes | |
36 | ||
ef42d733 | 37 | Revision 1.4 2000/07/03 11:54:57 morsch |
38 | AliMUONSegmentation and AliMUONHitMap have been replaced by AliSegmentation and AliHitMap in STEER | |
39 | The methods GetPadIxy and GetPadXxy of AliMUONSegmentation have changed name to GetPadI and GetPadC. | |
40 | ||
a30a000f | 41 | Revision 1.3 2000/06/29 12:34:09 morsch |
42 | AliMUONSegmentation class has been made independent of AliMUONChamber. This makes | |
43 | it usable with any other geometry class. The link to the object to which it belongs is | |
44 | established via an index. This assumes that there exists a global geometry manager | |
45 | from which the pointer to the parent object can be obtained (in our case gAlice). | |
46 | ||
d81db581 | 47 | Revision 1.2 2000/06/15 07:58:48 morsch |
48 | Code from MUON-dev joined | |
49 | ||
a9e2aefa | 50 | Revision 1.1.2.2 2000/06/12 07:57:23 morsch |
51 | include TMath.h | |
52 | ||
53 | Revision 1.1.2.1 2000/06/09 21:30:33 morsch | |
54 | AliMUONSegmentationV0 code from AliMUONSegResV0.cxx | |
55 | ||
56 | */ | |
57 | ||
58 | #include "AliMUONSegmentationV0.h" | |
59 | #include "TArc.h" | |
60 | #include "TMath.h" | |
61 | #include "AliMUONChamber.h" | |
d81db581 | 62 | #include "AliRun.h" |
63 | #include "AliMUON.h" | |
a9e2aefa | 64 | |
65 | ClassImp(AliMUONSegmentationV0) | |
66 | AliMUONSegmentationV0::AliMUONSegmentationV0(const AliMUONSegmentationV0& segmentation) | |
67 | { | |
68 | // Dummy copy constructor | |
69 | } | |
70 | ||
d81db581 | 71 | void AliMUONSegmentationV0::Init(Int_t chamber) |
a9e2aefa | 72 | { |
73 | // Initialises member data of the segmentation from geometry data | |
74 | // owned by Chamber | |
75 | // | |
d81db581 | 76 | AliMUON *pMUON = (AliMUON *) gAlice->GetModule("MUON"); |
3e1872ed | 77 | fChamber=&(pMUON->Chamber(chamber)); |
d81db581 | 78 | |
a9e2aefa | 79 | // Initialise maximum number of pads in x ans y |
3e1872ed | 80 | fNpx=(Int_t) (fChamber->ROuter()/fDpx+1); |
81 | fNpy=(Int_t) (fChamber->ROuter()/fDpy+1); | |
a9e2aefa | 82 | // Initialize inner and outer radius of the sensitive region |
3e1872ed | 83 | fRmin=fChamber->RInner(); |
84 | fRmax=fChamber->ROuter(); | |
a9e2aefa | 85 | fCorr=0; |
3e1872ed | 86 | fZ=fChamber->Z(); |
aaf4addd | 87 | fId=chamber; |
a9e2aefa | 88 | } |
89 | ||
90 | ||
c3eff6ad | 91 | Float_t AliMUONSegmentationV0::GetAnod(Float_t xhit) const |
a9e2aefa | 92 | { |
93 | // Returns for a hit position xhit the position of the nearest anode wire | |
94 | Float_t wire= (xhit>0)? Int_t(xhit/fWireD)+0.5:Int_t(xhit/fWireD)-0.5; | |
95 | return fWireD*wire; | |
96 | } | |
97 | ||
98 | void AliMUONSegmentationV0::SetPadSize(Float_t p1, Float_t p2) | |
99 | { | |
100 | // Sets the padsize | |
101 | // | |
102 | fDpx=p1; | |
103 | fDpy=p2; | |
104 | } | |
c3eff6ad | 105 | |
a9e2aefa | 106 | void AliMUONSegmentationV0:: |
c3eff6ad | 107 | GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy) |
a9e2aefa | 108 | { |
109 | // Returns pad coordinates (ix,iy) for given real coordinates (x,y) | |
110 | // | |
111 | ix = (x>0)? Int_t(x/fDpx)+1 : Int_t(x/fDpx)-1; | |
112 | iy = (y>0)? Int_t(y/fDpy)+1 : Int_t(y/fDpy)-1; | |
113 | if (iy > fNpy) iy= fNpy; | |
114 | if (iy < -fNpy) iy=-fNpy; | |
115 | if (ix > fNpx) ix= fNpx; | |
116 | if (ix < -fNpx) ix=-fNpx; | |
117 | } | |
c3eff6ad | 118 | |
a9e2aefa | 119 | void AliMUONSegmentationV0:: |
c3eff6ad | 120 | GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y) |
a9e2aefa | 121 | { |
122 | // Returns real coordinates (x,y) for given pad coordinates (ix,iy) | |
123 | // | |
124 | // Comments and Critics: | |
125 | ||
126 | // The Pad(0,0) does not exist, this causes in the present version errors | |
127 | // during iteration when used with hits close to zero. | |
128 | // Since we have frame crosses at x=0 or y=0 this does not cause any problems | |
129 | // Nevertheless, should be corrected in the next version !! | |
130 | // The name fRmin is misleading although we use this version with | |
131 | // a circular chamber geometry. | |
132 | ||
133 | x = (ix>0) ? Float_t(ix*fDpx)-fDpx/2. : Float_t(ix*fDpx)+fDpx/2.; | |
134 | y = (iy>0) ? Float_t(iy*fDpy)-fDpy/2. : Float_t(iy*fDpy)+fDpy/2.; | |
135 | } | |
136 | ||
137 | void AliMUONSegmentationV0:: | |
138 | SetHit(Float_t xhit, Float_t yhit) | |
139 | { | |
140 | // | |
141 | // Sets virtual hit position, needed for evaluating pad response | |
142 | // outside the tracking program | |
ecfa008b | 143 | fXhit=xhit; |
144 | fYhit=yhit; | |
a9e2aefa | 145 | } |
146 | ||
147 | void AliMUONSegmentationV0:: | |
148 | SetPad(Int_t ix, Int_t iy) | |
149 | { | |
150 | // | |
151 | // Sets virtual pad coordinates, needed for evaluating pad response | |
152 | // outside the tracking program | |
ecfa008b | 153 | GetPadC(ix,iy,fX,fY); |
a9e2aefa | 154 | } |
155 | ||
156 | void AliMUONSegmentationV0:: | |
157 | FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy) | |
158 | { | |
159 | // Initialises iteration over pads for charge distribution algorithm | |
160 | // | |
161 | // | |
162 | // Find the wire position (center of charge distribution) | |
163 | Float_t x0a=GetAnod(xhit); | |
ecfa008b | 164 | fXhit=x0a; |
165 | fYhit=yhit; | |
a9e2aefa | 166 | // |
167 | // and take fNsigma*sigma around this center | |
168 | Float_t x01=x0a - dx; | |
169 | Float_t x02=x0a + dx; | |
170 | Float_t y01=yhit - dy; | |
171 | Float_t y02=yhit + dy; | |
172 | // | |
173 | // find the pads over which the charge distributes | |
ecfa008b | 174 | GetPadI(x01,y01,fIxmin,fIymin); |
175 | GetPadI(x02,y02,fIxmax,fIymax); | |
a9e2aefa | 176 | // |
177 | // Set current pad to lower left corner | |
ecfa008b | 178 | fIx=fIxmin; |
179 | fIy=fIymin; | |
180 | GetPadC(fIx,fIy,fX,fY); | |
a9e2aefa | 181 | } |
182 | ||
183 | void AliMUONSegmentationV0::NextPad() | |
184 | { | |
185 | // Stepper for the iteration over pads | |
186 | // | |
187 | // Comments and Critics: | |
188 | // Boundary crossing at x=0 or y=0 not correctly handled ! | |
189 | // Step to next pad in the integration region | |
ecfa008b | 190 | if (fIx != fIxmax) { |
191 | if (fIx==-1) fIx++; | |
192 | fIx++; | |
193 | } else if (fIy != fIymax) { | |
194 | fIx=fIxmin; | |
195 | if (fIy==-1) fIy++; | |
196 | fIy++; | |
a9e2aefa | 197 | } else { |
198 | printf("\n Error: Stepping outside integration region\n "); | |
199 | } | |
ecfa008b | 200 | GetPadC(fIx,fIy,fX,fY); |
a9e2aefa | 201 | } |
202 | ||
203 | Int_t AliMUONSegmentationV0::MorePads() | |
de05461e | 204 | { |
a9e2aefa | 205 | // Stopping condition for the iterator over pads |
206 | // | |
207 | // Are there more pads in the integration region ? | |
de05461e | 208 | |
ecfa008b | 209 | if (fIx == fIxmax && fIy == fIymax) { |
a9e2aefa | 210 | return 0; |
211 | } else { | |
212 | return 1; | |
213 | ||
214 | } | |
215 | } | |
216 | ||
217 | void AliMUONSegmentationV0::SigGenInit(Float_t x,Float_t y,Float_t z) | |
218 | { | |
219 | // | |
220 | // Initialises pad and wire position during stepping | |
ecfa008b | 221 | fXt =x; |
222 | fYt =y; | |
223 | GetPadI(x,y,fIxt,fIyt); | |
224 | fIwt= (x>0) ? Int_t(x/fWireD)+1 : Int_t(x/fWireD)-1 ; | |
a9e2aefa | 225 | } |
c3eff6ad | 226 | |
227 | Int_t AliMUONSegmentationV0::SigGenCond(Float_t x,Float_t y,Float_t z) | |
a9e2aefa | 228 | { |
229 | // Signal generation condition during stepping | |
230 | // 0: don't generate signal | |
231 | // 1: generate signal | |
232 | // Comments and critics: | |
233 | ||
234 | // Crossing of pad boundary and mid plane between neighbouring wires is checked. | |
235 | // To correctly simulate the dependence of the spatial resolution on the angle | |
236 | // of incidence signal must be generated for constant steps on | |
237 | // the projection of the trajectory along the anode wire. | |
238 | ||
239 | // | |
240 | // Signal will be generated if particle crosses pad boundary or | |
241 | // boundary between two wires. | |
242 | Int_t ixt, iyt; | |
a30a000f | 243 | GetPadI(x,y,ixt,iyt); |
a9e2aefa | 244 | Int_t iwt=(x>0) ? Int_t(x/fWireD)+1 : Int_t(x/fWireD)-1; |
ecfa008b | 245 | if ((ixt != fIxt) || (iyt !=fIyt) || (iwt != fIwt)) { |
a9e2aefa | 246 | return 1; |
247 | } else { | |
248 | return 0; | |
249 | } | |
250 | } | |
251 | void AliMUONSegmentationV0:: | |
252 | IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2) | |
253 | { | |
254 | // Returns integration limits for current pad | |
255 | // | |
ecfa008b | 256 | x1=fXhit-fX-fDpx/2.; |
a9e2aefa | 257 | x2=x1+fDpx; |
ecfa008b | 258 | y1=fYhit-fY-fDpy/2.; |
a9e2aefa | 259 | y2=y1+fDpy; |
260 | } | |
261 | ||
262 | void AliMUONSegmentationV0:: | |
c3eff6ad | 263 | Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10]) |
a9e2aefa | 264 | { |
265 | // Returns list of next neighbours for given Pad (iX, iY) | |
266 | // | |
267 | // Comments and critics | |
268 | // "Diagonal" neighbours are not passed | |
269 | // Is this ok when we search for local maxima ?? | |
270 | // No test whether neighbours have valid indices id performed | |
271 | *Nlist=4; | |
272 | Xlist[0]=Xlist[1]=iX; | |
273 | Xlist[2]=iX-1; | |
274 | Xlist[3]=iX+1; | |
275 | Ylist[0]=iY-1; | |
276 | Ylist[1]=iY+1; | |
277 | Ylist[2]=Ylist[3]=iY; | |
278 | } | |
279 | ||
280 | Float_t AliMUONSegmentationV0::Distance2AndOffset(Int_t iX, Int_t iY, Float_t X, Float_t Y | |
281 | , Int_t *dummy) | |
de05461e | 282 | { |
a9e2aefa | 283 | // Returns the square of the distance between 1 pad |
284 | // labelled by its Channel numbers and a coordinate | |
de05461e | 285 | |
a9e2aefa | 286 | Float_t x,y; |
a30a000f | 287 | GetPadC(iX,iY,x,y); |
a9e2aefa | 288 | return (x-X)*(x-X) + (y-Y)*(y-Y); |
289 | } | |
290 | ||
291 | ||
c3eff6ad | 292 | void AliMUONSegmentationV0::GiveTestPoints(Int_t &n, Float_t *x, Float_t *y) const |
a9e2aefa | 293 | { |
294 | // Returns test point on the pad plane. | |
295 | // Used during determination of the segmoid correction of the COG-method | |
296 | n=1; | |
297 | x[0]=(fRmax+fRmin)/2/TMath::Sqrt(2.); | |
298 | y[0]=x[0]; | |
299 | } | |
300 | ||
c3eff6ad | 301 | void AliMUONSegmentationV0::Draw(const char *) const |
a9e2aefa | 302 | { |
303 | // Draws the segmentation zones | |
304 | // | |
305 | TArc *circle; | |
306 | Float_t scale=0.95/fRmax/2.; | |
307 | ||
308 | ||
309 | circle = new TArc(0.5,0.5,fRmax*scale,0.,360.); | |
310 | circle->SetFillColor(2); | |
311 | circle->Draw(); | |
312 | ||
313 | circle = new TArc(0.5,0.5,fRmin*scale,0.,360.); | |
314 | circle->SetFillColor(1); | |
315 | circle->Draw(); | |
316 | } | |
317 | ||
318 | AliMUONSegmentationV0& AliMUONSegmentationV0::operator =(const AliMUONSegmentationV0 & rhs) | |
319 | { | |
320 | // Dummy assignment operator | |
321 | return *this; | |
322 | } |