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 1.9 2001/01/26 21:25:48 morsch
19 Empty default constructors and.
21 Revision 1.8 2001/01/17 20:53:40 hristov
22 Destructors corrected to avoid memory leaks
24 Revision 1.7 2000/12/21 22:12:41 morsch
25 Clean-up of coding rule violations,
27 Revision 1.6 2000/11/06 09:20:43 morsch
28 AliMUON delegates part of BuildGeometry() to AliMUONSegmentation using the
29 Draw() method. This avoids code and parameter replication.
31 Revision 1.5 2000/10/26 19:32:04 morsch
32 Problem with iteration over y-pads for 2nd cathode corrected.
34 Revision 1.4 2000/10/25 19:56:55 morsch
35 Handle correctly slats with less than 3 segmentation zones.
37 Revision 1.3 2000/10/22 16:56:32 morsch
38 - Store chamber number as slat id.
40 Revision 1.2 2000/10/18 11:42:06 morsch
41 - AliMUONRawCluster contains z-position.
42 - Some clean-up of useless print statements during initialisations.
44 Revision 1.1 2000/10/06 08:59:03 morsch
45 Segmentation classes for bending and non bending plane slat modules (A. de Falco, A. Morsch)
49 /////////////////////////////////////////////////////
50 // Segmentation classes for slat modules //
51 // to be used with AluMUONSegmentationSlat //
52 /////////////////////////////////////////////////////
55 #include "AliMUONSegmentationSlatModule.h"
61 #include "AliMUONSegmentationV01.h"
63 //___________________________________________
64 ClassImp(AliMUONSegmentationSlatModule)
66 AliMUONSegmentationSlatModule::AliMUONSegmentationSlatModule()
68 // Default constructor
71 AliMUONSegmentationSlatModule::AliMUONSegmentationSlatModule(Int_t nsec)
73 // Non default constructor
75 fNDiv = new TArrayI(fNsec);
76 fDpxD = new TArrayF(fNsec);
77 (*fNDiv)[0]=(*fNDiv)[1]=(*fNDiv)[2]=(*fNDiv)[3]=0;
78 (*fDpxD)[0]=(*fDpxD)[1]=(*fDpxD)[2]=(*fDpxD)[3]=0;
81 AliMUONSegmentationSlatModule::~AliMUONSegmentationSlatModule()
84 if (fNDiv) delete fNDiv;
85 if (fDpxD) delete fDpxD;
88 void AliMUONSegmentationSlatModule::SetPcbBoards(Int_t n[4])
91 // Set Pcb Board segmentation zones
92 for (Int_t i=0; i<4; i++) fPcbBoards[i]=n[i];
96 void AliMUONSegmentationSlatModule::SetPadDivision(Int_t ndiv[4])
99 // Defines the pad size perp. to the anode wire (y) for different sectors.
100 // Pad sizes are defined as integral fractions ndiv of a basis pad size
103 for (Int_t i=0; i<4; i++) {
109 Float_t AliMUONSegmentationSlatModule::Dpx(Int_t isec) const
111 // Return x-strip width
112 return (*fDpxD)[isec];
116 Float_t AliMUONSegmentationSlatModule::Dpy(Int_t isec) const
118 // Return y-strip width
124 void AliMUONSegmentationSlatModule::
125 GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy)
127 // Returns pad coordinates (ix,iy) for given real coordinates (x,y)
129 iy = Int_t(y/fDpy)+1;
130 if (iy > fNpy) iy= fNpy;
135 for (Int_t i=fNsec-1; i > 0; i--) {
138 if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
144 ix= Int_t((x-fCx[isec-1])/(*fDpxD)[isec])
146 } else if (isec == 0) {
147 ix= Int_t(x/(*fDpxD)[isec])+1;
154 void AliMUONSegmentationSlatModule::
155 GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y)
157 // Returns real coordinates (x,y) for given pad coordinates (ix,iy)
159 y = Float_t(iy*fDpy)-fDpy/2.;
162 Int_t isec=AliMUONSegmentationSlatModule::Sector(ix,iy);
163 if (isec == -1) printf("\n PadC %d %d %d %d \n ", isec, fId, ix, iy);
166 x = fCx[isec-1]+(ix-fNpxS[isec-1])*(*fDpxD)[isec];
167 x = x-(*fDpxD)[isec]/2;
173 void AliMUONSegmentationSlatModule::
174 SetPad(Int_t ix, Int_t iy)
177 // Sets virtual pad coordinates, needed for evaluating pad response
178 // outside the tracking program
179 GetPadC(ix,iy,fX,fY);
180 fSector=Sector(ix,iy);
183 void AliMUONSegmentationSlatModule::
184 SetHit(Float_t x, Float_t y)
191 if (x < 0) fXhit = 0;
192 if (y < 0) fYhit = 0;
194 if (x >= fCx[fNsec-1]) fXhit = fCx[fNsec-1];
195 if (y >= fDyPCB) fYhit = fDyPCB;
201 void AliMUONSegmentationSlatModule::
202 FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy)
204 // Initialises iteration over pads for charge distribution algorithm
207 // Find the wire position (center of charge distribution)
208 Float_t x0a=GetAnod(xhit);
212 // and take fNsigma*sigma around this center
213 Float_t x01=x0a - dx;
214 Float_t x02=x0a + dx;
215 Float_t y01=yhit - dy;
216 Float_t y02=yhit + dy;
217 if (x01 < 0) x01 = 0;
218 if (y01 < 0) y01 = 0;
220 if (x02 >= fCx[fNsec-1]) x02 = fCx[fNsec-1];
225 for (Int_t i=fNsec-1; i > 0; i--) {
226 if (x02 >= fCx[i-1]) {
228 if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
233 if (y02 >= fDyPCB) y02 = fDyPCB;
236 // find the pads over which the charge distributes
237 GetPadI(x01,y01,fIxmin,fIymin);
238 GetPadI(x02,y02,fIxmax,fIymax);
240 if (fIxmax > fNpx) fIxmax=fNpx;
241 if (fIymax > fNpyS[isec]) fIymax = fNpyS[isec];
249 // Set current pad to lower left corner
250 if (fIxmax < fIxmin) fIxmax=fIxmin;
251 if (fIymax < fIymin) fIymax=fIymin;
255 GetPadC(fIx,fIy,fX,fY);
256 fSector=Sector(fIx,fIy);
258 printf("\n \n First Pad: %d %d %f %f %d %d %d %f" ,
259 fIxmin, fIxmax, fXmin, fXmax, fNpx, fId, isec, Dpy(isec));
260 printf("\n \n First Pad: %d %d %f %f %d %d %d %f",
261 fIymin, fIymax, fYmin, fYmax, fNpyS[isec], fId, isec, Dpy(isec));
265 void AliMUONSegmentationSlatModule::NextPad()
267 // Stepper for the iteration over pads
269 // Step to next pad in the integration region
270 // step from left to right
273 GetPadC(fIx,fIy,fX,fY);
274 fSector=Sector(fIx,fIy);
276 } else if (fIy != fIymax) {
279 GetPadC(fIx,fIy,fX,fY);
280 fSector=Sector(fIx,fIy);
286 // printf("\n Next Pad %d %d %f %f %d %d %d %d %d ",
290 Int_t AliMUONSegmentationSlatModule::MorePads()
292 // Stopping condition for the iterator over pads
294 // Are there more pads in the integration region
296 return (fIx != -1 || fIy != -1);
300 Int_t AliMUONSegmentationSlatModule::Sector(Int_t ix, Int_t iy)
303 // Determine segmentation zone from pad coordinates
306 for (Int_t i=0; i < fNsec; i++) {
307 if (ix <= fNpxS[i]) {
312 if (isec == -1) printf("\n Sector: Attention isec ! %d %d %d %d \n",
313 fId, ix, iy,fNpxS[3]);
319 void AliMUONSegmentationSlatModule::
320 IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
322 // Returns integration limits for current pad
325 x1=fXhit-fX-Dpx(fSector)/2.;
327 y1=fYhit-fY-Dpy(fSector)/2.;
329 // printf("\n Integration Limits %f %f %f %f %d %f", x1, x2, y1, y2, fSector, Dpx(fSector));
333 void AliMUONSegmentationSlatModule::
334 Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10])
336 // Returns list of next neighbours for given Pad (iX, iY)
370 void AliMUONSegmentationSlatModule::Init(Int_t chamber)
373 // Fill the arrays fCx (x-contour) and fNpxS (ix-contour) for each sector
374 // These arrays help in converting from real to pad co-ordinates and
377 // Segmentation is defined by rectangular modules approximating
378 // concentric circles as shown below
380 // PCB module size in cm
381 // printf("\n Initialise Segmentation SlatModule \n");
386 // number of pad rows per PCB
388 Int_t nPyPCB=Int_t(fDyPCB/fDpy);
390 // maximum number of pad rows
393 // Calculate padsize along x
394 (*fDpxD)[fNsec-1]=fDpx;
396 for (Int_t i=fNsec-2; i>=0; i--){
397 (*fDpxD)[i]=(*fDpxD)[fNsec-1]/(*fNDiv)[i];
401 // fill the arrays defining the pad segmentation boundaries
404 // Loop over sectors (isec=0 is the dead space surounding the beam pipe)
405 for (Int_t isec=0; isec<4; isec++) {
411 fNpxS[isec]=fNpxS[isec-1] + fPcbBoards[isec]*Int_t(fDxPCB/(*fDpxD)[isec]);
413 fCx[isec]=fCx[isec-1] + fPcbBoards[isec]*fDxPCB;
416 // maximum number of pad rows