1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
18 Revision 1.7 2000/12/21 22:12:41 morsch
19 Clean-up of coding rule violations,
21 Revision 1.6 2000/11/06 09:20:43 morsch
22 AliMUON delegates part of BuildGeometry() to AliMUONSegmentation using the
23 Draw() method. This avoids code and parameter replication.
25 Revision 1.5 2000/10/26 19:32:04 morsch
26 Problem with iteration over y-pads for 2nd cathode corrected.
28 Revision 1.4 2000/10/25 19:56:55 morsch
29 Handle correctly slats with less than 3 segmentation zones.
31 Revision 1.3 2000/10/22 16:56:32 morsch
32 - Store chamber number as slat id.
34 Revision 1.2 2000/10/18 11:42:06 morsch
35 - AliMUONRawCluster contains z-position.
36 - Some clean-up of useless print statements during initialisations.
38 Revision 1.1 2000/10/06 08:59:03 morsch
39 Segmentation classes for bending and non bending plane slat modules (A. de Falco, A. Morsch)
43 /////////////////////////////////////////////////////
44 // Segmentation classes for slat modules //
45 // to be used with AluMUONSegmentationSlat //
46 /////////////////////////////////////////////////////
49 #include "AliMUONSegmentationSlatModule.h"
55 #include "AliMUONSegmentationV01.h"
57 //___________________________________________
58 ClassImp(AliMUONSegmentationSlatModule)
60 AliMUONSegmentationSlatModule::AliMUONSegmentationSlatModule()
62 // Default constructor
64 fNDiv = new TArrayI(fNsec);
65 fDpxD = new TArrayF(fNsec);
66 (*fNDiv)[0]=(*fNDiv)[1]=(*fNDiv)[2]=(*fNDiv)[3]=0;
67 (*fDpxD)[0]=(*fDpxD)[1]=(*fDpxD)[2]=(*fDpxD)[3]=0;
70 void AliMUONSegmentationSlatModule::SetPcbBoards(Int_t n[4])
73 // Set Pcb Board segmentation zones
74 for (Int_t i=0; i<4; i++) fPcbBoards[i]=n[i];
78 void AliMUONSegmentationSlatModule::SetPadDivision(Int_t ndiv[4])
81 // Defines the pad size perp. to the anode wire (y) for different sectors.
82 // Pad sizes are defined as integral fractions ndiv of a basis pad size
85 for (Int_t i=0; i<4; i++) {
91 Float_t AliMUONSegmentationSlatModule::Dpx(Int_t isec) const
93 // Return x-strip width
94 return (*fDpxD)[isec];
98 Float_t AliMUONSegmentationSlatModule::Dpy(Int_t isec) const
100 // Return y-strip width
106 void AliMUONSegmentationSlatModule::
107 GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy)
109 // Returns pad coordinates (ix,iy) for given real coordinates (x,y)
111 iy = Int_t(y/fDpy)+1;
112 if (iy > fNpy) iy= fNpy;
117 for (Int_t i=fNsec-1; i > 0; i--) {
120 if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
126 ix= Int_t((x-fCx[isec-1])/(*fDpxD)[isec])
128 } else if (isec == 0) {
129 ix= Int_t(x/(*fDpxD)[isec])+1;
136 void AliMUONSegmentationSlatModule::
137 GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y)
139 // Returns real coordinates (x,y) for given pad coordinates (ix,iy)
141 y = Float_t(iy*fDpy)-fDpy/2.;
144 Int_t isec=AliMUONSegmentationSlatModule::Sector(ix,iy);
145 if (isec == -1) printf("\n PadC %d %d %d %d \n ", isec, fId, ix, iy);
148 x = fCx[isec-1]+(ix-fNpxS[isec-1])*(*fDpxD)[isec];
149 x = x-(*fDpxD)[isec]/2;
155 void AliMUONSegmentationSlatModule::
156 SetPad(Int_t ix, Int_t iy)
159 // Sets virtual pad coordinates, needed for evaluating pad response
160 // outside the tracking program
161 GetPadC(ix,iy,fX,fY);
162 fSector=Sector(ix,iy);
165 void AliMUONSegmentationSlatModule::
166 SetHit(Float_t x, Float_t y)
173 if (x < 0) fXhit = 0;
174 if (y < 0) fYhit = 0;
176 if (x >= fCx[fNsec-1]) fXhit = fCx[fNsec-1];
177 if (y >= fDyPCB) fYhit = fDyPCB;
183 void AliMUONSegmentationSlatModule::
184 FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy)
186 // Initialises iteration over pads for charge distribution algorithm
189 // Find the wire position (center of charge distribution)
190 Float_t x0a=GetAnod(xhit);
194 // and take fNsigma*sigma around this center
195 Float_t x01=x0a - dx;
196 Float_t x02=x0a + dx;
197 Float_t y01=yhit - dy;
198 Float_t y02=yhit + dy;
199 if (x01 < 0) x01 = 0;
200 if (y01 < 0) y01 = 0;
202 if (x02 >= fCx[fNsec-1]) x02 = fCx[fNsec-1];
207 for (Int_t i=fNsec-1; i > 0; i--) {
208 if (x02 >= fCx[i-1]) {
210 if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
215 if (y02 >= fDyPCB) y02 = fDyPCB;
218 // find the pads over which the charge distributes
219 GetPadI(x01,y01,fIxmin,fIymin);
220 GetPadI(x02,y02,fIxmax,fIymax);
222 if (fIxmax > fNpx) fIxmax=fNpx;
223 if (fIymax > fNpyS[isec]) fIymax = fNpyS[isec];
231 // Set current pad to lower left corner
232 if (fIxmax < fIxmin) fIxmax=fIxmin;
233 if (fIymax < fIymin) fIymax=fIymin;
237 GetPadC(fIx,fIy,fX,fY);
238 fSector=Sector(fIx,fIy);
240 printf("\n \n First Pad: %d %d %f %f %d %d %d %f" ,
241 fIxmin, fIxmax, fXmin, fXmax, fNpx, fId, isec, Dpy(isec));
242 printf("\n \n First Pad: %d %d %f %f %d %d %d %f",
243 fIymin, fIymax, fYmin, fYmax, fNpyS[isec], fId, isec, Dpy(isec));
247 void AliMUONSegmentationSlatModule::NextPad()
249 // Stepper for the iteration over pads
251 // Step to next pad in the integration region
252 // step from left to right
255 GetPadC(fIx,fIy,fX,fY);
256 fSector=Sector(fIx,fIy);
258 } else if (fIy != fIymax) {
261 GetPadC(fIx,fIy,fX,fY);
262 fSector=Sector(fIx,fIy);
268 // printf("\n Next Pad %d %d %f %f %d %d %d %d %d ",
272 Int_t AliMUONSegmentationSlatModule::MorePads()
274 // Stopping condition for the iterator over pads
276 // Are there more pads in the integration region
278 return (fIx != -1 || fIy != -1);
282 Int_t AliMUONSegmentationSlatModule::Sector(Int_t ix, Int_t iy)
285 // Determine segmentation zone from pad coordinates
288 for (Int_t i=0; i < fNsec; i++) {
289 if (ix <= fNpxS[i]) {
294 if (isec == -1) printf("\n Sector: Attention isec ! %d %d %d %d \n",
295 fId, ix, iy,fNpxS[3]);
301 void AliMUONSegmentationSlatModule::
302 IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
304 // Returns integration limits for current pad
307 x1=fXhit-fX-Dpx(fSector)/2.;
309 y1=fYhit-fY-Dpy(fSector)/2.;
311 // printf("\n Integration Limits %f %f %f %f %d %f", x1, x2, y1, y2, fSector, Dpx(fSector));
315 void AliMUONSegmentationSlatModule::
316 Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10])
318 // Returns list of next neighbours for given Pad (iX, iY)
352 void AliMUONSegmentationSlatModule::Init(Int_t chamber)
355 // Fill the arrays fCx (x-contour) and fNpxS (ix-contour) for each sector
356 // These arrays help in converting from real to pad co-ordinates and
359 // Segmentation is defined by rectangular modules approximating
360 // concentric circles as shown below
362 // PCB module size in cm
363 printf("\n Initialise Segmentation SlatModule \n");
368 // number of pad rows per PCB
370 Int_t nPyPCB=Int_t(fDyPCB/fDpy);
372 // maximum number of pad rows
375 // Calculate padsize along x
376 (*fDpxD)[fNsec-1]=fDpx;
378 for (Int_t i=fNsec-2; i>=0; i--){
379 (*fDpxD)[i]=(*fDpxD)[fNsec-1]/(*fNDiv)[i];
383 // fill the arrays defining the pad segmentation boundaries
386 // Loop over sectors (isec=0 is the dead space surounding the beam pipe)
387 for (Int_t isec=0; isec<4; isec++) {
393 fNpxS[isec]=fNpxS[isec-1] + fPcbBoards[isec]*Int_t(fDxPCB/(*fDpxD)[isec]);
395 fCx[isec]=fCx[isec-1] + fPcbBoards[isec]*fDxPCB;
398 // maximum number of pad rows