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 1.5 2000/10/26 19:32:04 morsch
19 Problem with iteration over y-pads for 2nd cathode corrected.
21 Revision 1.4 2000/10/25 19:56:55 morsch
22 Handle correctly slats with less than 3 segmentation zones.
24 Revision 1.3 2000/10/22 16:56:32 morsch
25 - Store chamber number as slat id.
27 Revision 1.2 2000/10/18 11:42:06 morsch
28 - AliMUONRawCluster contains z-position.
29 - Some clean-up of useless print statements during initialisations.
31 Revision 1.1 2000/10/06 08:59:03 morsch
32 Segmentation classes for bending and non bending plane slat modules (A. de Falco, A. Morsch)
36 /////////////////////////////////////////////////////
37 // Segmentation classes for slat modules //
38 // to be used with AluMUONSegmentationSlat //
39 /////////////////////////////////////////////////////
42 #include "AliMUONSegmentationSlatModule.h"
48 #include "AliMUONSegmentationV01.h"
50 //___________________________________________
51 ClassImp(AliMUONSegmentationSlatModule)
53 AliMUONSegmentationSlatModule::AliMUONSegmentationSlatModule()
55 // Default constructor
57 fNDiv = new TArrayI(fNsec);
58 fDpxD = new TArrayF(fNsec);
59 (*fNDiv)[0]=(*fNDiv)[1]=(*fNDiv)[2]=(*fNDiv)[3]=0;
60 (*fDpxD)[0]=(*fDpxD)[1]=(*fDpxD)[2]=(*fDpxD)[3]=0;
63 void AliMUONSegmentationSlatModule::SetPcbBoards(Int_t n[4])
66 // Set Pcb Board segmentation zones
67 for (Int_t i=0; i<4; i++) fPcbBoards[i]=n[i];
71 void AliMUONSegmentationSlatModule::SetPadDivision(Int_t ndiv[4])
74 // Defines the pad size perp. to the anode wire (y) for different sectors.
75 // Pad sizes are defined as integral fractions ndiv of a basis pad size
78 for (Int_t i=0; i<4; i++) {
84 Float_t AliMUONSegmentationSlatModule::Dpx(Int_t isec) const
86 // Return x-strip width
87 return (*fDpxD)[isec];
91 Float_t AliMUONSegmentationSlatModule::Dpy(Int_t isec) const
93 // Return y-strip width
99 void AliMUONSegmentationSlatModule::
100 GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy)
102 // Returns pad coordinates (ix,iy) for given real coordinates (x,y)
104 iy = Int_t(y/fDpy)+1;
105 if (iy > fNpy) iy= fNpy;
110 for (Int_t i=fNsec-1; i > 0; i--) {
113 if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
119 ix= Int_t((x-fCx[isec-1])/(*fDpxD)[isec])
121 } else if (isec == 0) {
122 ix= Int_t(x/(*fDpxD)[isec])+1;
129 void AliMUONSegmentationSlatModule::
130 GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y)
132 // Returns real coordinates (x,y) for given pad coordinates (ix,iy)
134 y = Float_t(iy*fDpy)-fDpy/2.;
137 Int_t isec=AliMUONSegmentationSlatModule::Sector(ix,iy);
138 if (isec == -1) printf("\n PadC %d %d %d %d \n ", isec, fId, ix, iy);
141 x = fCx[isec-1]+(ix-fNpxS[isec-1])*(*fDpxD)[isec];
142 x = x-(*fDpxD)[isec]/2;
148 void AliMUONSegmentationSlatModule::
149 SetPad(Int_t ix, Int_t iy)
152 // Sets virtual pad coordinates, needed for evaluating pad response
153 // outside the tracking program
154 GetPadC(ix,iy,fX,fY);
155 fSector=Sector(ix,iy);
158 void AliMUONSegmentationSlatModule::
159 SetHit(Float_t x, Float_t y)
164 if (x < 0) fXhit = 0;
165 if (y < 0) fYhit = 0;
167 if (x >= fCx[fNsec-1]) fXhit = fCx[fNsec-1];
168 if (y >= fDyPCB) fYhit = fDyPCB;
174 void AliMUONSegmentationSlatModule::
175 FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy)
177 // Initialises iteration over pads for charge distribution algorithm
180 // Find the wire position (center of charge distribution)
181 Float_t x0a=GetAnod(xhit);
185 // and take fNsigma*sigma around this center
186 Float_t x01=x0a - dx;
187 Float_t x02=x0a + dx;
188 Float_t y01=yhit - dy;
189 Float_t y02=yhit + dy;
190 if (x01 < 0) x01 = 0;
191 if (y01 < 0) y01 = 0;
193 if (x02 >= fCx[fNsec-1]) x02 = fCx[fNsec-1];
198 for (Int_t i=fNsec-1; i > 0; i--) {
199 if (x02 >= fCx[i-1]) {
201 if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
206 if (y02 >= fDyPCB) y02 = fDyPCB;
209 // find the pads over which the charge distributes
210 GetPadI(x01,y01,fIxmin,fIymin);
211 GetPadI(x02,y02,fIxmax,fIymax);
213 if (fIxmax > fNpx) fIxmax=fNpx;
214 if (fIymax > fNpyS[isec]) fIymax = fNpyS[isec];
222 // Set current pad to lower left corner
223 if (fIxmax < fIxmin) fIxmax=fIxmin;
224 if (fIymax < fIymin) fIymax=fIymin;
228 GetPadC(fIx,fIy,fX,fY);
229 fSector=Sector(fIx,fIy);
231 printf("\n \n First Pad: %d %d %f %f %d %d %d %f" ,
232 fIxmin, fIxmax, fXmin, fXmax, fNpx, fId, isec, Dpy(isec));
233 printf("\n \n First Pad: %d %d %f %f %d %d %d %f",
234 fIymin, fIymax, fYmin, fYmax, fNpyS[isec], fId, isec, Dpy(isec));
238 void AliMUONSegmentationSlatModule::NextPad()
240 // Stepper for the iteration over pads
242 // Step to next pad in the integration region
243 // step from left to right
246 GetPadC(fIx,fIy,fX,fY);
247 fSector=Sector(fIx,fIy);
249 } else if (fIy != fIymax) {
252 GetPadC(fIx,fIy,fX,fY);
253 fSector=Sector(fIx,fIy);
259 // printf("\n Next Pad %d %d %f %f %d %d %d %d %d ",
263 Int_t AliMUONSegmentationSlatModule::MorePads()
264 // Stopping condition for the iterator over pads
266 // Are there more pads in the integration region
269 return (fIx != -1 || fIy != -1);
273 Int_t AliMUONSegmentationSlatModule::Sector(Int_t ix, Int_t iy)
276 // Determine segmentation zone from pad coordinates
279 for (Int_t i=0; i < fNsec; i++) {
280 if (ix <= fNpxS[i]) {
285 if (isec == -1) printf("\n Sector: Attention isec ! %d %d %d %d \n",
286 fId, ix, iy,fNpxS[3]);
292 void AliMUONSegmentationSlatModule::
293 IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
295 // Returns integration limits for current pad
298 x1=fXhit-fX-Dpx(fSector)/2.;
300 y1=fYhit-fY-Dpy(fSector)/2.;
302 // printf("\n Integration Limits %f %f %f %f %d %f", x1, x2, y1, y2, fSector, Dpx(fSector));
306 void AliMUONSegmentationSlatModule::
307 Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10])
309 // Returns list of next neighbours for given Pad (iX, iY)
343 void AliMUONSegmentationSlatModule::Init(Int_t chamber)
345 printf("\n Initialise Segmentation SlatModule \n");
347 // Fill the arrays fCx (x-contour) and fNpxS (ix-contour) for each sector
348 // These arrays help in converting from real to pad co-ordinates and
351 // Segmentation is defined by rectangular modules approximating
352 // concentric circles as shown below
354 // PCB module size in cm
358 // number of pad rows per PCB
360 Int_t nPyPCB=Int_t(fDyPCB/fDpy);
362 // maximum number of pad rows
365 // Calculate padsize along x
366 (*fDpxD)[fNsec-1]=fDpx;
368 for (Int_t i=fNsec-2; i>=0; i--){
369 (*fDpxD)[i]=(*fDpxD)[fNsec-1]/(*fNDiv)[i];
373 // fill the arrays defining the pad segmentation boundaries
376 // Loop over sectors (isec=0 is the dead space surounding the beam pipe)
377 for (Int_t isec=0; isec<4; isec++) {
383 fNpxS[isec]=fNpxS[isec-1] + fPcbBoards[isec]*Int_t(fDxPCB/(*fDpxD)[isec]);
385 fCx[isec]=fCx[isec-1] + fPcbBoards[isec]*fDxPCB;
388 // maximum number of pad rows
392 AliMUON *pMUON = (AliMUON *) gAlice->GetModule("MUON");