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"
29 //___________________________________________
30 ClassImp(AliMUONSegmentationSlatModule)
32 AliMUONSegmentationSlatModule::AliMUONSegmentationSlatModule()
33 : AliMUONSegmentationV0()
35 // Default constructor
40 AliMUONSegmentationSlatModule::AliMUONSegmentationSlatModule(Int_t nsec)
41 : AliMUONSegmentationV0()
43 // Non default constructor
45 fNDiv = new TArrayI(fNsec);
46 fDpxD = new TArrayF(fNsec);
47 (*fNDiv)[0]=(*fNDiv)[1]=(*fNDiv)[2]=(*fNDiv)[3]=0;
48 (*fDpxD)[0]=(*fDpxD)[1]=(*fDpxD)[2]=(*fDpxD)[3]=0;
51 //----------------------------------------------------------------------
52 AliMUONSegmentationSlatModule::AliMUONSegmentationSlatModule(
53 const AliMUONSegmentationSlatModule& rhs)
54 : AliMUONSegmentationV0(rhs)
56 // Protected copy constructor
58 AliFatal("Not implemented.");
62 AliMUONSegmentationSlatModule::~AliMUONSegmentationSlatModule()
65 if (fNDiv) delete fNDiv;
66 if (fDpxD) delete fDpxD;
69 //----------------------------------------------------------------------
70 AliMUONSegmentationSlatModule&
71 AliMUONSegmentationSlatModule::operator=(
72 const AliMUONSegmentationSlatModule& rhs)
74 // Protected assignement operator
76 if (this == &rhs) return *this;
78 AliFatal("Not implemented.");
83 void AliMUONSegmentationSlatModule::SetPcbBoards(Int_t n[4])
86 // Set Pcb Board segmentation zones
87 for (Int_t i=0; i<4; i++) fPcbBoards[i]=n[i];
91 void AliMUONSegmentationSlatModule::SetPadDivision(Int_t ndiv[4])
94 // Defines the pad size perp. to the anode wire (y) for different sectors.
95 // Pad sizes are defined as integral fractions ndiv of a basis pad size
98 for (Int_t i=0; i<4; i++) {
104 Float_t AliMUONSegmentationSlatModule::Dpx(Int_t isec) const
106 // Return x-strip width
107 return (*fDpxD)[isec];
111 Float_t AliMUONSegmentationSlatModule::Dpy(Int_t /*isec*/) const
113 // Return y-strip width
119 void AliMUONSegmentationSlatModule::
120 GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy)
122 // Returns pad coordinates (ix,iy) for given real coordinates (x,y)
124 iy = Int_t(y/fDpy)+1;
125 if (iy > fNpy) iy= fNpy;
130 for (Int_t i=fNsec-1; i > 0; i--) {
133 if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
139 ix= Int_t((x-fCx[isec-1])/(*fDpxD)[isec])
141 } else if (isec == 0) {
142 ix= Int_t(x/(*fDpxD)[isec])+1;
149 void AliMUONSegmentationSlatModule::
150 GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y)
152 // Returns real coordinates (x,y) for given pad coordinates (ix,iy)
154 y = Float_t(iy*fDpy)-fDpy/2.;
157 Int_t isec=AliMUONSegmentationSlatModule::Sector(ix,iy);
158 if (isec == -1) printf("\n PadC %d %d %d %d \n ", isec, fId, ix, iy);
161 x = fCx[isec-1]+(ix-fNpxS[isec-1])*(*fDpxD)[isec];
162 x = x-(*fDpxD)[isec]/2;
167 //-------------------------------------------------------------------------
168 void AliMUONSegmentationSlatModule::GetPadI(Float_t x, Float_t y , Float_t /*z*/, Int_t &ix, Int_t &iy)
170 GetPadI(x, y, ix, iy);
172 //-------------------------------------------------------------------------
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;
199 //----------------------------------------------------------
200 void AliMUONSegmentationSlatModule::SetHit(Float_t xhit, Float_t yhit, Float_t /*zhit*/)
204 //----------------------------------------------------------
205 void AliMUONSegmentationSlatModule::
206 FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy)
208 // Initialises iteration over pads for charge distribution algorithm
211 // Find the wire position (center of charge distribution)
212 Float_t x0a=GetAnod(xhit);
216 // and take fNsigma*sigma around this center
217 Float_t x01=x0a - dx;
218 Float_t x02=x0a + dx;
219 Float_t y01=yhit - dy;
220 Float_t y02=yhit + dy;
221 if (x01 < 0) x01 = 0;
222 if (y01 < 0) y01 = 0;
224 if (x02 >= fCx[fNsec-1]) x02 = fCx[fNsec-1];
229 for (Int_t i=fNsec-1; i > 0; i--) {
230 if (x02 >= fCx[i-1]) {
232 if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
237 if (y02 >= fDyPCB) y02 = fDyPCB;
240 // find the pads over which the charge distributes
241 GetPadI(x01,y01,fIxmin,fIymin);
242 GetPadI(x02,y02,fIxmax,fIymax);
244 if (fIxmax > fNpx) fIxmax=fNpx;
245 if (fIymax > fNpyS[isec]) fIymax = fNpyS[isec];
253 // Set current pad to lower left corner
254 if (fIxmax < fIxmin) fIxmax=fIxmin;
255 if (fIymax < fIymin) fIymax=fIymin;
259 GetPadC(fIx,fIy,fX,fY);
260 fSector=Sector(fIx,fIy);
262 printf("\n \n First Pad: %d %d %f %f %d %d %d %f" ,
263 fIxmin, fIxmax, fXmin, fXmax, fNpx, fId, isec, Dpy(isec));
264 printf("\n \n First Pad: %d %d %f %f %d %d %d %f",
265 fIymin, fIymax, fYmin, fYmax, fNpyS[isec], fId, isec, Dpy(isec));
268 //----------------------------------------------------------------------
269 void AliMUONSegmentationSlatModule::FirstPad(Float_t xhit, Float_t yhit, Float_t /*zhit*/, Float_t dx, Float_t dy)
271 FirstPad(xhit, yhit, dx, dy);
273 //----------------------------------------------------------------------
274 void AliMUONSegmentationSlatModule::NextPad()
276 // Stepper for the iteration over pads
278 // Step to next pad in the integration region
279 // step from left to right
282 GetPadC(fIx,fIy,fX,fY);
283 fSector=Sector(fIx,fIy);
285 } else if (fIy != fIymax) {
288 GetPadC(fIx,fIy,fX,fY);
289 fSector=Sector(fIx,fIy);
295 // printf("\n Next Pad %d %d %f %f %d %d %d %d %d ",
299 Int_t AliMUONSegmentationSlatModule::MorePads()
301 // Stopping condition for the iterator over pads
303 // Are there more pads in the integration region
305 return (fIx != -1 || fIy != -1);
309 Int_t AliMUONSegmentationSlatModule::Sector(Int_t ix, Int_t iy)
312 // Determine segmentation zone from pad coordinates
315 for (Int_t i=0; i < fNsec; i++) {
316 if (ix <= fNpxS[i]) {
321 if (isec == -1) printf("\n Sector: Attention isec ! %d %d %d %d \n",
322 fId, ix, iy,fNpxS[3]);
328 void AliMUONSegmentationSlatModule::
329 IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
331 // Returns integration limits for current pad
334 x1=fXhit-fX-Dpx(fSector)/2.;
336 y1=fYhit-fY-Dpy(fSector)/2.;
338 // printf("\n Integration Limits %f %f %f %f %d %f", x1, x2, y1, y2, fSector, Dpx(fSector));
342 void AliMUONSegmentationSlatModule::
343 Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10])
345 // Returns list of next neighbours for given Pad (iX, iY)
379 void AliMUONSegmentationSlatModule::Init(Int_t chamber)
382 // Fill the arrays fCx (x-contour) and fNpxS (ix-contour) for each sector
383 // These arrays help in converting from real to pad co-ordinates and
386 // Segmentation is defined by rectangular modules approximating
387 // concentric circles as shown below
389 // PCB module size in cm
390 // printf("\n Initialise Segmentation SlatModule \n");
395 // number of pad rows per PCB
397 Int_t nPyPCB=Int_t(fDyPCB/fDpy);
399 // maximum number of pad rows
402 // Calculate padsize along x
403 (*fDpxD)[fNsec-1]=fDpx;
405 for (Int_t i=fNsec-2; i>=0; i--){
406 (*fDpxD)[i]=(*fDpxD)[fNsec-1]/(*fNDiv)[i];
410 // fill the arrays defining the pad segmentation boundaries
413 // Loop over sectors (isec=0 is the dead space surounding the beam pipe)
414 for (Int_t isec=0; isec<4; isec++) {
420 fNpxS[isec]=fNpxS[isec-1] + fPcbBoards[isec]*Int_t(fDxPCB/(*fDpxD)[isec]);
422 fCx[isec]=fCx[isec-1] + fPcbBoards[isec]*fDxPCB;
425 // maximum number of pad rows