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 /////////////////////////////////////////////////////
19 // Segmentation classes for slat modules //
20 // to be used with AluMUONSegmentationSlat //
21 /////////////////////////////////////////////////////
26 #include "AliMUONSegmentationSlatModule.h"
28 //___________________________________________
29 ClassImp(AliMUONSegmentationSlatModule)
31 AliMUONSegmentationSlatModule::AliMUONSegmentationSlatModule()
32 : AliMUONSegmentationV0()
34 // Default constructor
39 AliMUONSegmentationSlatModule::AliMUONSegmentationSlatModule(Int_t nsec)
40 : AliMUONSegmentationV0()
42 // Non default constructor
44 fNDiv = new TArrayI(fNsec);
45 fDpxD = new TArrayF(fNsec);
46 (*fNDiv)[0]=(*fNDiv)[1]=(*fNDiv)[2]=(*fNDiv)[3]=0;
47 (*fDpxD)[0]=(*fDpxD)[1]=(*fDpxD)[2]=(*fDpxD)[3]=0;
50 //----------------------------------------------------------------------
51 AliMUONSegmentationSlatModule::AliMUONSegmentationSlatModule(
52 const AliMUONSegmentationSlatModule& rhs)
53 : AliMUONSegmentationV0(rhs)
55 // Protected copy constructor
57 Fatal("AliMUONSegmentationSlatModule", "Not implemented.");
61 AliMUONSegmentationSlatModule::~AliMUONSegmentationSlatModule()
64 if (fNDiv) delete fNDiv;
65 if (fDpxD) delete fDpxD;
68 //----------------------------------------------------------------------
69 AliMUONSegmentationSlatModule&
70 AliMUONSegmentationSlatModule::operator=(
71 const AliMUONSegmentationSlatModule& rhs)
73 // Protected assignement operator
75 if (this == &rhs) return *this;
77 Fatal("operator=", "Not implemented.");
82 void AliMUONSegmentationSlatModule::SetPcbBoards(Int_t n[4])
85 // Set Pcb Board segmentation zones
86 for (Int_t i=0; i<4; i++) fPcbBoards[i]=n[i];
90 void AliMUONSegmentationSlatModule::SetPadDivision(Int_t ndiv[4])
93 // Defines the pad size perp. to the anode wire (y) for different sectors.
94 // Pad sizes are defined as integral fractions ndiv of a basis pad size
97 for (Int_t i=0; i<4; i++) {
103 Float_t AliMUONSegmentationSlatModule::Dpx(Int_t isec) const
105 // Return x-strip width
106 return (*fDpxD)[isec];
110 Float_t AliMUONSegmentationSlatModule::Dpy(Int_t /*isec*/) const
112 // Return y-strip width
118 void AliMUONSegmentationSlatModule::
119 GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy)
121 // Returns pad coordinates (ix,iy) for given real coordinates (x,y)
123 iy = Int_t(y/fDpy)+1;
124 if (iy > fNpy) iy= fNpy;
129 for (Int_t i=fNsec-1; i > 0; i--) {
132 if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
138 ix= Int_t((x-fCx[isec-1])/(*fDpxD)[isec])
140 } else if (isec == 0) {
141 ix= Int_t(x/(*fDpxD)[isec])+1;
148 void AliMUONSegmentationSlatModule::
149 GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y)
151 // Returns real coordinates (x,y) for given pad coordinates (ix,iy)
153 y = Float_t(iy*fDpy)-fDpy/2.;
156 Int_t isec=AliMUONSegmentationSlatModule::Sector(ix,iy);
157 if (isec == -1) printf("\n PadC %d %d %d %d \n ", isec, fId, ix, iy);
160 x = fCx[isec-1]+(ix-fNpxS[isec-1])*(*fDpxD)[isec];
161 x = x-(*fDpxD)[isec]/2;
166 //-------------------------------------------------------------------------
167 void AliMUONSegmentationSlatModule::GetPadI(Float_t x, Float_t y , Float_t /*z*/, Int_t &ix, Int_t &iy)
169 GetPadI(x, y, ix, iy);
171 //-------------------------------------------------------------------------
172 void AliMUONSegmentationSlatModule::
173 SetPad(Int_t ix, Int_t iy)
176 // Sets virtual pad coordinates, needed for evaluating pad response
177 // outside the tracking program
178 GetPadC(ix,iy,fX,fY);
179 fSector=Sector(ix,iy);
182 void AliMUONSegmentationSlatModule::
183 SetHit(Float_t x, Float_t y)
190 if (x < 0) fXhit = 0;
191 if (y < 0) fYhit = 0;
193 if (x >= fCx[fNsec-1]) fXhit = fCx[fNsec-1];
194 if (y >= fDyPCB) fYhit = fDyPCB;
198 //----------------------------------------------------------
199 void AliMUONSegmentationSlatModule::SetHit(Float_t xhit, Float_t yhit, Float_t /*zhit*/)
203 //----------------------------------------------------------
204 void AliMUONSegmentationSlatModule::
205 FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy)
207 // Initialises iteration over pads for charge distribution algorithm
210 // Find the wire position (center of charge distribution)
211 Float_t x0a=GetAnod(xhit);
215 // and take fNsigma*sigma around this center
216 Float_t x01=x0a - dx;
217 Float_t x02=x0a + dx;
218 Float_t y01=yhit - dy;
219 Float_t y02=yhit + dy;
220 if (x01 < 0) x01 = 0;
221 if (y01 < 0) y01 = 0;
223 if (x02 >= fCx[fNsec-1]) x02 = fCx[fNsec-1];
228 for (Int_t i=fNsec-1; i > 0; i--) {
229 if (x02 >= fCx[i-1]) {
231 if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
236 if (y02 >= fDyPCB) y02 = fDyPCB;
239 // find the pads over which the charge distributes
240 GetPadI(x01,y01,fIxmin,fIymin);
241 GetPadI(x02,y02,fIxmax,fIymax);
243 if (fIxmax > fNpx) fIxmax=fNpx;
244 if (fIymax > fNpyS[isec]) fIymax = fNpyS[isec];
252 // Set current pad to lower left corner
253 if (fIxmax < fIxmin) fIxmax=fIxmin;
254 if (fIymax < fIymin) fIymax=fIymin;
258 GetPadC(fIx,fIy,fX,fY);
259 fSector=Sector(fIx,fIy);
261 printf("\n \n First Pad: %d %d %f %f %d %d %d %f" ,
262 fIxmin, fIxmax, fXmin, fXmax, fNpx, fId, isec, Dpy(isec));
263 printf("\n \n First Pad: %d %d %f %f %d %d %d %f",
264 fIymin, fIymax, fYmin, fYmax, fNpyS[isec], fId, isec, Dpy(isec));
267 //----------------------------------------------------------------------
268 void AliMUONSegmentationSlatModule::FirstPad(Float_t xhit, Float_t yhit, Float_t /*zhit*/, Float_t dx, Float_t dy)
270 FirstPad(xhit, yhit, dx, dy);
272 //----------------------------------------------------------------------
273 void AliMUONSegmentationSlatModule::NextPad()
275 // Stepper for the iteration over pads
277 // Step to next pad in the integration region
278 // step from left to right
281 GetPadC(fIx,fIy,fX,fY);
282 fSector=Sector(fIx,fIy);
284 } else if (fIy != fIymax) {
287 GetPadC(fIx,fIy,fX,fY);
288 fSector=Sector(fIx,fIy);
294 // printf("\n Next Pad %d %d %f %f %d %d %d %d %d ",
298 Int_t AliMUONSegmentationSlatModule::MorePads()
300 // Stopping condition for the iterator over pads
302 // Are there more pads in the integration region
304 return (fIx != -1 || fIy != -1);
308 Int_t AliMUONSegmentationSlatModule::Sector(Int_t ix, Int_t iy)
311 // Determine segmentation zone from pad coordinates
314 for (Int_t i=0; i < fNsec; i++) {
315 if (ix <= fNpxS[i]) {
320 if (isec == -1) printf("\n Sector: Attention isec ! %d %d %d %d \n",
321 fId, ix, iy,fNpxS[3]);
327 void AliMUONSegmentationSlatModule::
328 IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
330 // Returns integration limits for current pad
333 x1=fXhit-fX-Dpx(fSector)/2.;
335 y1=fYhit-fY-Dpy(fSector)/2.;
337 // printf("\n Integration Limits %f %f %f %f %d %f", x1, x2, y1, y2, fSector, Dpx(fSector));
341 void AliMUONSegmentationSlatModule::
342 Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10])
344 // Returns list of next neighbours for given Pad (iX, iY)
378 void AliMUONSegmentationSlatModule::Init(Int_t chamber)
381 // Fill the arrays fCx (x-contour) and fNpxS (ix-contour) for each sector
382 // These arrays help in converting from real to pad co-ordinates and
385 // Segmentation is defined by rectangular modules approximating
386 // concentric circles as shown below
388 // PCB module size in cm
389 // printf("\n Initialise Segmentation SlatModule \n");
394 // number of pad rows per PCB
396 Int_t nPyPCB=Int_t(fDyPCB/fDpy);
398 // maximum number of pad rows
401 // Calculate padsize along x
402 (*fDpxD)[fNsec-1]=fDpx;
404 for (Int_t i=fNsec-2; i>=0; i--){
405 (*fDpxD)[i]=(*fDpxD)[fNsec-1]/(*fNDiv)[i];
409 // fill the arrays defining the pad segmentation boundaries
412 // Loop over sectors (isec=0 is the dead space surounding the beam pipe)
413 for (Int_t isec=0; isec<4; isec++) {
419 fNpxS[isec]=fNpxS[isec-1] + fPcbBoards[isec]*Int_t(fDxPCB/(*fDpxD)[isec]);
421 fCx[isec]=fCx[isec-1] + fPcbBoards[isec]*fDxPCB;
424 // maximum number of pad rows