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237c933d | 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 | /* | |
17 | $Log$ | |
18 | */ | |
19 | #include "AliRICHSegmentationV0.h" | |
20 | ||
21 | ||
22 | ClassImp(AliRICHSegmentationV0) | |
23 | ||
24 | void AliRICHSegmentationV0::Init(AliRICHChamber* Chamber) | |
25 | { | |
26 | ||
27 | // Initialisation of chambers | |
28 | ||
29 | //fNpx=(Int_t) (Chamber->ROuter()/fDpx+1); | |
30 | //fNpy=(Int_t) (Chamber->ROuter()/fDpy+1); | |
31 | fNpx=160; | |
32 | fNpy=144; | |
33 | //fNpx=80; | |
34 | //fNpy=48; | |
35 | fSector=-1; | |
36 | } | |
37 | ||
38 | ||
39 | Float_t AliRICHSegmentationV0::GetAnod(Float_t xhit) | |
40 | { | |
41 | ||
42 | // Get anod wire closer to hit | |
43 | ||
44 | Float_t wire= (xhit>0)? Int_t(xhit/fWireD)+0.5:Int_t(xhit/fWireD)-0.5; | |
45 | return fWireD*wire; | |
46 | } | |
47 | ||
48 | void AliRICHSegmentationV0::SetPadSize(Float_t p1, Float_t p2) | |
49 | { | |
50 | ||
51 | // Set the pad size | |
52 | ||
53 | fDpx=p1; | |
54 | fDpy=p2; | |
55 | } | |
56 | void AliRICHSegmentationV0::GetPadIxy(Float_t x, Float_t y, Int_t &ix, Int_t &iy) | |
57 | { | |
58 | // returns pad coordinates (ix,iy) for given real coordinates (x,y) | |
59 | // | |
60 | // Please check origin of pad numbering !!! | |
61 | ||
62 | ||
63 | ix = (x>0)? Int_t(x/fDpx)+1 : Int_t(x/fDpx); | |
64 | iy = (y>0)? Int_t(y/fDpy)+1 : Int_t(y/fDpy); | |
65 | if (iy > fNpy) iy= fNpy; | |
66 | if (iy < -fNpy) iy=-fNpy; | |
67 | if (ix > fNpx) ix= fNpx; | |
68 | if (ix < -fNpx) ix=-fNpx; | |
69 | } | |
70 | void AliRICHSegmentationV0:: | |
71 | GetPadCxy(Int_t ix, Int_t iy, Float_t &x, Float_t &y) | |
72 | { | |
73 | // returns real coordinates (x,y) for given pad coordinates (ix,iy) | |
74 | // | |
75 | ||
76 | x = (ix>0) ? Float_t(ix*fDpx)-fDpx/2. : Float_t(ix*fDpx)-fDpx/2.; | |
77 | y = (iy>0) ? Float_t(iy*fDpy)-fDpy/2. : Float_t(iy*fDpy)-fDpy/2.; | |
78 | } | |
79 | ||
80 | void AliRICHSegmentationV0:: | |
81 | SetHit(Float_t xhit, Float_t yhit) | |
82 | { | |
83 | // | |
84 | // Find the wire position (center of charge distribution) | |
85 | // Float_t x0a=GetAnod(xhit); | |
86 | fxhit=xhit; | |
87 | fyhit=yhit; | |
88 | } | |
89 | ||
90 | void AliRICHSegmentationV0:: | |
91 | SetPad(Int_t ix, Int_t iy) | |
92 | { | |
93 | ||
94 | // Move to pad ix, iy | |
95 | ||
96 | GetPadCxy(ix,iy,fx,fy); | |
97 | } | |
98 | ||
99 | ||
100 | ||
101 | void AliRICHSegmentationV0:: | |
102 | FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy) | |
103 | { | |
104 | ||
105 | // | |
106 | // Find the wire position (center of charge distribution) | |
107 | Float_t x0a=GetAnod(xhit); | |
108 | fxhit=x0a; | |
109 | fyhit=yhit; | |
110 | // | |
111 | // and take fNsigma*sigma around this center | |
112 | Float_t x01=x0a - dx; | |
113 | Float_t x02=x0a + dx; | |
114 | Float_t y01=yhit - dy; | |
115 | Float_t y02=yhit + dy; | |
116 | // | |
117 | // find the pads over which the charge distributes | |
118 | GetPadIxy(x01,y01,fixmin,fiymin); | |
119 | GetPadIxy(x02,y02,fixmax,fiymax); | |
120 | // | |
121 | // Set current pad to lower left corner | |
122 | fix=fixmin; | |
123 | fiy=fiymin; | |
124 | GetPadCxy(fix,fiy,fx,fy); | |
125 | ||
126 | //if (fSector==2) | |
127 | //printf("fix: %d, fiy: %d fx: %f, fy: %f\n",fix,fiy,fx,fy); | |
128 | } | |
129 | ||
130 | void AliRICHSegmentationV0::NextPad() | |
131 | { | |
132 | //printf("\n Next Pad \n"); | |
133 | ||
134 | // | |
135 | // Step to next pad in integration region | |
136 | if (fix <= fixmax) { | |
137 | // if (fix==-1) fix++; | |
138 | fix++; | |
139 | } else if (fiy <= fiymax) { | |
140 | // if (fiy==-1) fiy++; | |
141 | fix=fixmin; | |
142 | fiy++; | |
143 | } else { | |
144 | printf("\n Error: Stepping outside integration region\n "); | |
145 | } | |
146 | GetPadCxy(fix,fiy,fx,fy); | |
147 | } | |
148 | ||
149 | Int_t AliRICHSegmentationV0::MorePads() | |
150 | ||
151 | { | |
152 | // | |
153 | // Are there more pads in the integration region | |
154 | ||
155 | //printf("\n More Pads ? \n"); | |
156 | ||
157 | ||
158 | if (fix >= fixmax && fiy >= fiymax) { | |
159 | //printf("There are no more pads\n\n\n\n\n"); | |
160 | return 0; | |
161 | } else { | |
162 | //printf("There are more pads\n\n"); | |
163 | return 1; | |
164 | } | |
165 | } | |
166 | ||
167 | void AliRICHSegmentationV0::SigGenInit(Float_t x,Float_t y,Float_t) | |
168 | { | |
169 | // | |
170 | // Initialises pad and wire position during stepping | |
171 | fxt =x; | |
172 | fyt =y; | |
173 | GetPadIxy(x,y,fixt,fiyt); | |
174 | fiwt= (x>0) ? Int_t(x/fWireD)+1 : Int_t(x/fWireD)-1 ; | |
175 | } | |
176 | ||
177 | Int_t AliRICHSegmentationV0::SigGenCond(Float_t x,Float_t y,Float_t) | |
178 | { | |
179 | // | |
180 | // Signal will be generated if particle crosses pad boundary or | |
181 | // boundary between two wires. | |
182 | Int_t ixt, iyt; | |
183 | GetPadIxy(x,y,ixt,iyt); | |
184 | Int_t iwt=(x>0) ? Int_t(x/fWireD)+1 : Int_t(x/fWireD)-1; | |
185 | ||
186 | if ((ixt != fixt) || (iyt !=fiyt) || (iwt != fiwt)) { | |
187 | return 1; | |
188 | } else { | |
189 | return 0; | |
190 | } | |
191 | } | |
192 | void AliRICHSegmentationV0:: | |
193 | IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2) | |
194 | { | |
195 | ||
196 | // Calculate the integration limits | |
197 | ||
198 | /* | |
199 | x1=fxt-fx-fDpx/2.; | |
200 | x2=x1+fDpx; | |
201 | y1=fyt-fy-fDpy/2.; | |
202 | y2=y1+fDpy; | |
203 | */ | |
204 | x1=fxhit-fx-fDpx/2.; | |
205 | x2=x1+fDpx; | |
206 | y1=fyhit-fy-fDpy/2.; | |
207 | y2=y1+fDpy; | |
208 | } | |
209 | ||
210 | void AliRICHSegmentationV0:: | |
211 | Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[7], Int_t Ylist[7]) | |
212 | { | |
213 | //Is used for the cluster finder, include diagonal elements | |
214 | ||
215 | *Nlist=4;Xlist[0]=Xlist[1]=iX;Xlist[2]=iX-1;Xlist[3]=iX+1; | |
216 | Ylist[0]=iY-1;Ylist[1]=iY+1;Ylist[2]=Ylist[3]=iY; | |
217 | /* | |
218 | *Nlist=8; | |
219 | Xlist[0]=Xlist[1]=iX; | |
220 | Xlist[2]=iX-1; | |
221 | Xlist[3]=iX+1; | |
222 | Ylist[0]=iY-1; | |
223 | Ylist[1]=iY+1; | |
224 | Ylist[2]=Ylist[3]=iY; | |
225 | ||
226 | // Diagonal elements | |
227 | Xlist[4]=iX+1; | |
228 | Ylist[4]=iY+1; | |
229 | ||
230 | Xlist[5]=iX-1; | |
231 | Ylist[5]=iY-1; | |
232 | ||
233 | Xlist[6]=iX-1; | |
234 | Ylist[6]=iY+1; | |
235 | ||
236 | Xlist[7]=iX+1; | |
237 | Ylist[7]=iY-1; | |
238 | */ | |
239 | } | |
240 | ||
241 | Float_t AliRICHSegmentationV0::Distance2AndOffset(Int_t iX, Int_t iY, Float_t X, Float_t Y | |
242 | , Int_t *dummy) | |
243 | ||
244 | { | |
245 | // Returns the square of the distance between 1 pad | |
246 | // labelled by its Channel numbers and a coordinate | |
247 | ||
248 | Float_t x,y; | |
249 | GetPadCxy(iX,iY,x,y); | |
250 | return (x-X)*(x-X) + (y-Y)*(y-Y); | |
251 | } | |
252 | ||
253 | ||
254 | void AliRICHSegmentationV0::GiveTestPoints(Int_t &n, Float_t *x, Float_t *y) | |
255 | { | |
256 | ||
257 | // Test | |
258 | ||
259 | n=1; | |
260 | x[0]=0.; | |
261 | y[0]=x[0]; | |
262 | } | |
263 | ||
264 | void AliRICHSegmentationV0::Draw() | |
265 | { | |
266 | ||
267 | // Dummy draw routine | |
268 | ||
269 | /* | |
270 | TArc *circle; | |
271 | Float_t scale=0.95/fRmax/2.; | |
272 | ||
273 | ||
274 | circle = new TArc(0.5,0.5,fRmax*scale,0.,360.); | |
275 | circle->SetFillColor(2); | |
276 | circle->Draw(); | |
277 | ||
278 | circle = new TArc(0.5,0.5,fRmin*scale,0.,360.); | |
279 | circle->SetFillColor(1); | |
280 | circle->Draw(); | |
281 | */ | |
282 | ; | |
283 | ||
284 | } |