Cleaned up version.
[u/mrichter/AliRoot.git] / RICH / AliRICHSegmentationV0.cxx
CommitLineData
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
22ClassImp(AliRICHSegmentationV0)
23
24void 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
39Float_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
48void AliRICHSegmentationV0::SetPadSize(Float_t p1, Float_t p2)
49{
50
51// Set the pad size
52
53 fDpx=p1;
54 fDpy=p2;
55}
56void 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}
70void AliRICHSegmentationV0::
71GetPadCxy(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
80void AliRICHSegmentationV0::
81SetHit(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
90void AliRICHSegmentationV0::
91SetPad(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
101void AliRICHSegmentationV0::
102FirstPad(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
130void 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
149Int_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
167void 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
177Int_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}
192void AliRICHSegmentationV0::
193IntegrationLimits(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
210void AliRICHSegmentationV0::
211Neighbours(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
241Float_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
254void 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
264void 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}