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1 | #include "AliMUONSegResV0.h" | |
2 | #include "TMath.h" | |
3 | #include "TRandom.h" | |
4 | #include "TArc.h" | |
5 | #include "AliMUONchamber.h" | |
6 | ClassImp(AliMUONsegmentationV0) | |
7 | void AliMUONsegmentationV0::Init(AliMUONchamber* Chamber) | |
8 | { | |
9 | fNpx=(Int_t) (Chamber->ROuter()/fDpx+1); | |
10 | fNpy=(Int_t) (Chamber->ROuter()/fDpy+1); | |
11 | fRmin=Chamber->RInner(); | |
12 | fRmax=Chamber->ROuter(); | |
13 | fCorr=0; | |
14 | ||
15 | } | |
16 | ||
17 | ||
18 | Float_t AliMUONsegmentationV0::GetAnod(Float_t xhit) | |
19 | { | |
20 | Float_t wire= (xhit>0)? Int_t(xhit/fWireD)+0.5:Int_t(xhit/fWireD)-0.5; | |
21 | return fWireD*wire; | |
22 | } | |
23 | ||
24 | void AliMUONsegmentationV0::SetPADSIZ(Float_t p1, Float_t p2) | |
25 | { | |
26 | fDpx=p1; | |
27 | fDpy=p2; | |
28 | } | |
29 | void AliMUONsegmentationV0:: | |
30 | GetPadIxy(Float_t x, Float_t y, Int_t &ix, Int_t &iy) | |
31 | { | |
32 | // returns pad coordinates (ix,iy) for given real coordinates (x,y) | |
33 | // | |
34 | ix = (x>0)? Int_t(x/fDpx)+1 : Int_t(x/fDpx)-1; | |
35 | iy = (y>0)? Int_t(y/fDpy)+1 : Int_t(y/fDpy)-1; | |
36 | if (iy > fNpy) iy= fNpy; | |
37 | if (iy < -fNpy) iy=-fNpy; | |
38 | if (ix > fNpx) ix= fNpx; | |
39 | if (ix < -fNpx) ix=-fNpx; | |
40 | } | |
41 | void AliMUONsegmentationV0:: | |
42 | GetPadCxy(Int_t ix, Int_t iy, Float_t &x, Float_t &y) | |
43 | { | |
44 | // returns real coordinates (x,y) for given pad coordinates (ix,iy) | |
45 | // | |
46 | x = (ix>0) ? Float_t(ix*fDpx)-fDpx/2. : Float_t(ix*fDpx)+fDpx/2.; | |
47 | y = (iy>0) ? Float_t(iy*fDpy)-fDpy/2. : Float_t(iy*fDpy)+fDpy/2.; | |
48 | } | |
49 | ||
50 | void AliMUONsegmentationV0:: | |
51 | SetHit(Float_t xhit, Float_t yhit) | |
52 | { | |
53 | // | |
54 | // Find the wire position (center of charge distribution) | |
55 | // Float_t x0a=GetAnod(xhit); | |
56 | fxhit=xhit; | |
57 | fyhit=yhit; | |
58 | } | |
59 | ||
60 | void AliMUONsegmentationV0:: | |
61 | SetPad(Int_t ix, Int_t iy) | |
62 | { | |
63 | GetPadCxy(ix,iy,fx,fy); | |
64 | } | |
65 | ||
66 | void AliMUONsegmentationV0:: | |
67 | FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy) | |
68 | { | |
69 | // | |
70 | // Find the wire position (center of charge distribution) | |
71 | Float_t x0a=GetAnod(xhit); | |
72 | fxhit=x0a; | |
73 | fyhit=yhit; | |
74 | // | |
75 | // and take fNsigma*sigma around this center | |
76 | Float_t x01=x0a - dx; | |
77 | Float_t x02=x0a + dx; | |
78 | Float_t y01=yhit - dy; | |
79 | Float_t y02=yhit + dy; | |
80 | // | |
81 | // find the pads over which the charge distributes | |
82 | GetPadIxy(x01,y01,fixmin,fiymin); | |
83 | GetPadIxy(x02,y02,fixmax,fiymax); | |
84 | // printf("\n %f %f %d %d \n",x02,y02,fixmax,fiymax); | |
85 | // printf("\n FirstPad called %f %f \n", fDpx, fDpy); | |
86 | // printf("\n Hit Position %f %f \n",xhit,yhit); | |
87 | // printf("\n Integration limits: %i %i %i %i",fixmin,fixmax,fiymin,fiymax); | |
88 | // printf("\n Integration limits: %f %f %f %f \n",x01,x02,y01,y02); | |
89 | // | |
90 | // Set current pad to lower left corner | |
91 | fix=fixmin; | |
92 | fiy=fiymin; | |
93 | GetPadCxy(fix,fiy,fx,fy); | |
94 | } | |
95 | ||
96 | void AliMUONsegmentationV0::NextPad() | |
97 | { | |
98 | // | |
99 | // Step to next pad in integration region | |
100 | if (fix != fixmax) { | |
101 | if (fix==-1) fix++; | |
102 | fix++; | |
103 | } else if (fiy != fiymax) { | |
104 | fix=fixmin; | |
105 | if (fiy==-1) fiy++; | |
106 | fiy++; | |
107 | } else { | |
108 | printf("\n Error: Stepping outside integration region\n "); | |
109 | } | |
110 | GetPadCxy(fix,fiy,fx,fy); | |
111 | } | |
112 | ||
113 | Int_t AliMUONsegmentationV0::MorePads() | |
114 | // | |
115 | // Are there more pads in the integration region | |
116 | { | |
117 | if (fix == fixmax && fiy == fiymax) { | |
118 | return 0; | |
119 | } else { | |
120 | return 1; | |
121 | ||
122 | } | |
123 | } | |
124 | ||
125 | void AliMUONsegmentationV0::SigGenInit(Float_t x,Float_t y,Float_t) | |
126 | { | |
127 | // | |
128 | // Initialises pad and wire position during stepping | |
129 | fxt =x; | |
130 | fyt =y; | |
131 | GetPadIxy(x,y,fixt,fiyt); | |
132 | fiwt= (x>0) ? Int_t(x/fWireD)+1 : Int_t(x/fWireD)-1 ; | |
133 | } | |
134 | ||
135 | Int_t AliMUONsegmentationV0::SigGenCond(Float_t x,Float_t y,Float_t) | |
136 | { | |
137 | // | |
138 | // Signal will be generated if particle crosses pad boundary or | |
139 | // boundary between two wires. | |
140 | Int_t ixt, iyt; | |
141 | GetPadIxy(x,y,ixt,iyt); | |
142 | Int_t iwt=(x>0) ? Int_t(x/fWireD)+1 : Int_t(x/fWireD)-1; | |
143 | if ((ixt != fixt) || (iyt !=fiyt) || (iwt != fiwt)) { | |
144 | return 1; | |
145 | } else { | |
146 | return 0; | |
147 | } | |
148 | } | |
149 | void AliMUONsegmentationV0:: | |
150 | IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2) | |
151 | { | |
152 | // x1=GetAnod(fxt)-fx-fDpx/2.; | |
153 | x1=fxhit-fx-fDpx/2.; | |
154 | x2=x1+fDpx; | |
155 | y1=fyhit-fy-fDpy/2.; | |
156 | y2=y1+fDpy; | |
157 | } | |
158 | ||
159 | void AliMUONsegmentationV0:: | |
160 | Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[7], Int_t Ylist[7]) | |
161 | { | |
162 | /* | |
163 | *Nlist=4;Xlist[0]=Xlist[1]=iX;Xlist[2]=iX-1;Xlist[3]=iX+1; | |
164 | Ylist[0]=iY-1;Ylist[1]=iY+1;Ylist[2]=Ylist[3]=iY; | |
165 | */ | |
166 | *Nlist=8; | |
167 | Xlist[0]=Xlist[1]=iX; | |
168 | Xlist[2]=iX-1; | |
169 | Xlist[3]=iX+1; | |
170 | Ylist[0]=iY-1; | |
171 | Ylist[1]=iY+1; | |
172 | Ylist[2]=Ylist[3]=iY; | |
173 | ||
174 | // Diagonal elements | |
175 | Xlist[4]=iX+1; | |
176 | Ylist[4]=iY+1; | |
177 | ||
178 | Xlist[5]=iX-1; | |
179 | Ylist[5]=iY-1; | |
180 | ||
181 | Xlist[6]=iX-1; | |
182 | Ylist[6]=iY+1; | |
183 | ||
184 | Xlist[7]=iX+1; | |
185 | Ylist[7]=iY-1; | |
186 | } | |
187 | ||
188 | Float_t AliMUONsegmentationV0::Distance2AndOffset(Int_t iX, Int_t iY, Float_t X, Float_t Y | |
189 | , Int_t *) | |
190 | // Returns the square of the distance between 1 pad | |
191 | // labelled by its Channel numbers and a coordinate | |
192 | { | |
193 | Float_t x,y; | |
194 | GetPadCxy(iX,iY,x,y); | |
195 | return (x-X)*(x-X) + (y-Y)*(y-Y); | |
196 | } | |
197 | ||
198 | void AliMUONsegmentationV0::GiveTestPoints(Int_t &n, Float_t *x, Float_t *y) | |
199 | { | |
200 | n=1; | |
201 | x[0]=(fRmax+fRmin)/2/TMath::Sqrt(2.); | |
202 | y[0]=x[0]; | |
203 | } | |
204 | ||
205 | void AliMUONsegmentationV0::Draw(Option_t *) | |
206 | { | |
207 | TArc *circle; | |
208 | Float_t scale=0.95/fRmax/2.; | |
209 | ||
210 | ||
211 | circle = new TArc(0.5,0.5,fRmax*scale,0.,360.); | |
212 | circle->SetFillColor(2); | |
213 | circle->Draw(); | |
214 | ||
215 | circle = new TArc(0.5,0.5,fRmin*scale,0.,360.); | |
216 | circle->SetFillColor(1); | |
217 | circle->Draw(); | |
218 | } | |
219 | ||
220 | ||
221 | ||
222 | //___________________________________________ | |
223 | ClassImp(AliMUONresponseV0) | |
224 | Float_t AliMUONresponseV0::IntPH(Float_t eloss) | |
225 | { | |
226 | // Get number of electrons and return charge | |
227 | ||
228 | Int_t nel; | |
229 | nel= Int_t(eloss*1.e9/32.); | |
230 | Float_t charge=0; | |
231 | if (nel == 0) nel=1; | |
232 | for (Int_t i=1;i<=nel;i++) { | |
233 | charge -= fChargeSlope*TMath::Log(gRandom->Rndm()); | |
234 | } | |
235 | return charge; | |
236 | } | |
237 | // ------------------------------------------- | |
238 | ||
239 | Float_t AliMUONresponseV0::IntXY(AliMUONsegmentation * segmentation) | |
240 | { | |
241 | ||
242 | const Float_t invpitch = 1/fPitch; | |
243 | // | |
244 | // Integration limits defined by segmentation model | |
245 | // | |
246 | Float_t xi1, xi2, yi1, yi2; | |
247 | segmentation->IntegrationLimits(xi1,xi2,yi1,yi2); | |
248 | xi1=xi1*invpitch; | |
249 | xi2=xi2*invpitch; | |
250 | yi1=yi1*invpitch; | |
251 | yi2=yi2*invpitch; | |
252 | // | |
253 | // The Mathieson function | |
254 | Double_t ux1=fSqrtKx3*TMath::TanH(fKx2*xi1); | |
255 | Double_t ux2=fSqrtKx3*TMath::TanH(fKx2*xi2); | |
256 | ||
257 | Double_t uy1=fSqrtKy3*TMath::TanH(fKy2*yi1); | |
258 | Double_t uy2=fSqrtKy3*TMath::TanH(fKy2*yi2); | |
259 | ||
260 | ||
261 | return Float_t(4.*fKx4*(TMath::ATan(ux2)-TMath::ATan(ux1))* | |
262 | fKy4*(TMath::ATan(uy2)-TMath::ATan(uy1))); | |
263 | } | |
264 | ||
265 | ||
266 | ||
267 | ||
268 | ||
269 | ||
270 | ||
271 | ||
272 |