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 // This class works with local coordinates
21 // of the slats via the class AliMUONGeometrySegmentation
22 // This class contains the size of the slats and the
23 // and the differents PCB densities.
24 // (from old AliMUONSegmentationSlatModule)
25 // Gines, Subatech, Nov04
26 //*********************************************************
30 #include "AliMUONSt345SlatSegmentation.h"
33 //___________________________________________
34 ClassImp(AliMUONSt345SlatSegmentation)
37 AliMUONSt345SlatSegmentation::AliMUONSt345SlatSegmentation(Bool_t bending)
38 : AliMUONVGeometryDESegmentation(),
57 // Non default constructor
58 fNsec = 4; // 4 sector densities at most per slat
59 fNDiv = new TArrayI(fNsec);
60 fDpxD = new TArrayF(fNsec);
61 fDpyD = new TArrayF(fNsec);
62 (*fNDiv)[0]=(*fNDiv)[1]=(*fNDiv)[2]=(*fNDiv)[3]=0;
63 (*fDpxD)[0]=(*fDpxD)[1]=(*fDpxD)[2]=(*fDpxD)[3]=0;
64 (*fDpyD)[0]=(*fDpyD)[1]=(*fDpyD)[2]=(*fDpyD)[3]=0;
66 //----------------------------------------------------------------------
67 AliMUONSt345SlatSegmentation::AliMUONSt345SlatSegmentation(const AliMUONSt345SlatSegmentation& rhs) : AliMUONVGeometryDESegmentation(rhs)
69 AliFatal("Not implemented.");
71 //----------------------------------------------------------------------
72 AliMUONSt345SlatSegmentation::~AliMUONSt345SlatSegmentation()
75 if (fNDiv) delete fNDiv;
76 if (fDpxD) delete fDpxD;
77 if (fDpyD) delete fDpyD;
79 //----------------------------------------------------------------------
80 AliMUONSt345SlatSegmentation& AliMUONSt345SlatSegmentation::operator=(const AliMUONSt345SlatSegmentation& rhs)
82 // Protected assignement operator
83 if (this == &rhs) return *this;
84 AliFatal("Not implemented.");
89 //------------------------------------------------------------------------
90 Float_t AliMUONSt345SlatSegmentation::Distance2AndOffset(Int_t iX, Int_t iY, Float_t X, Float_t Y, Int_t * /*dummy*/)
92 // Returns the square of the distance between 1 pad
93 // labelled by its Channel numbers and a coordinate
96 return (x-X)*(x-X) + (y-Y)*(y-Y);
98 //____________________________________________________________________________
99 Float_t AliMUONSt345SlatSegmentation::Dpx(Int_t isec) const
101 // Return x-strip width
102 return (*fDpxD)[isec];
105 //____________________________________________________________________________
106 Float_t AliMUONSt345SlatSegmentation::Dpy(Int_t isec) const
108 // Return y-strip width
109 return (*fDpyD)[isec];
111 //_____________________________________________________________________________
112 Float_t AliMUONSt345SlatSegmentation::GetAnod(Float_t xhit) const
114 // Returns for a hit position xhit the position of the nearest anode wire
115 Float_t wire= (xhit>0)? Int_t(xhit/fWireD)+0.5:Int_t(xhit/fWireD)-0.5;
121 //--------------------------------------------------------------------------------
122 void AliMUONSt345SlatSegmentation::GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y)
124 if (ix<1 || ix>Npx() || iy<1 || iy>Npy() ){
125 AliWarning(Form("ix or iy out of boundaries: Npx=%d and Npy=%d",Npx(),Npy()));
126 x=-99999.; y=-99999.;
129 // Returns real coordinates (x,y) for given pad coordinates (ix,iy)
131 Int_t isec = Sector(ix,iy);
132 if (isec == -1) printf("\n PadC %d %d %d %d \n ", isec, fId, ix, iy);
133 if (iy > fNpyS[isec]) {
134 x=-99999.; y=-99999.;
138 x = fCx[isec-1]+(ix-fNpxS[isec-1])*(*fDpxD)[isec];
139 x = x-(*fDpxD)[isec]/2;
140 y = Float_t(iy*(*fDpyD)[isec])-(*fDpyD)[isec]/2.- fCy; // !!!
148 //_____________________________________________________________________________
149 void AliMUONSt345SlatSegmentation::GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy)
151 // Returns pad coordinates (ix,iy) for given real coordinates (x,y)
155 for (Int_t i=fNsec-1; i > 0; i--) {
158 if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
164 ix= Int_t((x-fCx[isec-1])/(*fDpxD)[isec])
166 iy= Int_t((y+fCy)/(*fDpyD)[isec])+1;
167 } else if (isec == 0) {
168 ix= Int_t(x/(*fDpxD)[isec])+1;
169 iy= Int_t((y+fCy)/(*fDpyD)[isec])+1;
175 //-------------------------------------------------------------------------
176 void AliMUONSt345SlatSegmentation::GetPadI(Float_t x, Float_t y , Float_t /*z*/, Int_t &ix, Int_t &iy)
178 GetPadI(x, y, ix, iy);
180 //_______________________________________________________________
181 void AliMUONSt345SlatSegmentation::SetPadDivision(Int_t ndiv[4])
183 // Defines the pad size perp. to the anode wire (y) for different sectors.
184 // Pad sizes are defined as integral fractions ndiv of a basis pad size
187 for (Int_t i=0; i<4; i++) {
192 //____________________________________________________________________________
193 void AliMUONSt345SlatSegmentation::SetPadSize(Float_t p1, Float_t p2)
199 //_______________________________________________________________
200 void AliMUONSt345SlatSegmentation::SetPcbBoards(Int_t n[4])
203 // Set PcbBoard segmentation zones for each density
204 // n[0] PcbBoards for maximum density sector fNDiv[0]
205 // n[1] PcbBoards for next density sector fNDiv[1] etc ...
206 for (Int_t i=0; i<4; i++) fPcbBoards[i]=n[i];
208 //-------------------------------------------------------------------------
209 void AliMUONSt345SlatSegmentation::SetPad(Int_t ix, Int_t iy)
212 // Sets virtual pad coordinates, needed for evaluating pad response
213 // outside the tracking program
214 GetPadC(ix,iy,fX,fY);
215 fSector=Sector(ix,iy);
217 //---------------------------------------------------------------------------
218 void AliMUONSt345SlatSegmentation::SetHit(Float_t x, Float_t y)
225 if (x < 0) fXhit = 0;
226 if (y < 0) fYhit = 0;
228 if (x >= fCx[fNsec-1]) fXhit = fCx[fNsec-1];
229 if (y >= fDyPCB) fYhit = fDyPCB;
232 //----------------------------------------------------------------------------
233 void AliMUONSt345SlatSegmentation::SetHit(Float_t xhit, Float_t yhit, Float_t /*zhit*/)
238 //----------------------------------------------------------
239 void AliMUONSt345SlatSegmentation::FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy)
241 // Initialises iteration over pads for charge distribution algorithm
244 // Find the wire position (center of charge distribution)
245 Float_t x0a=GetAnod(xhit);
249 // and take fNsigma*sigma around this center
250 Float_t x01=x0a - dx;
251 Float_t x02=x0a + dx;
252 Float_t y01=yhit - dy;
253 Float_t y02=yhit + dy;
254 if (x01 < 0) x01 = 0;
255 if (y01 < 0) y01 = 0;
257 if (x02 >= fCx[fNsec-1]) x02 = fCx[fNsec-1];
261 for (Int_t i=fNsec-1; i > 0; i--) {
262 if (x02 >= fCx[i-1]) {
264 if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
269 if (y02 >= fDyPCB) y02 = fDyPCB;
272 // find the pads over which the charge distributes
273 GetPadI(x01,y01,fIxmin,fIymin);
274 GetPadI(x02,y02,fIxmax,fIymax);
276 if (fIxmax > fNpx) fIxmax=fNpx;
277 if (fIymax > fNpyS[isec]) fIymax = fNpyS[isec];
285 // Set current pad to lower left corner
286 if (fIxmax < fIxmin) fIxmax=fIxmin;
287 if (fIymax < fIymin) fIymax=fIymin;
291 GetPadC(fIx,fIy,fX,fY);
292 fSector=Sector(fIx,fIy);
294 printf("\n \n First Pad: %d %d %f %f %d %d %d %f" ,
295 fIxmin, fIxmax, fXmin, fXmax, fNpx, fId, isec, Dpy(isec));
296 printf("\n \n First Pad: %d %d %f %f %d %d %d %f",
297 fIymin, fIymax, fYmin, fYmax, fNpyS[isec], fId, isec, Dpy(isec));
303 //----------------------------------------------------------------------
304 void AliMUONSt345SlatSegmentation::FirstPad(Float_t xhit, Float_t yhit, Float_t /*zhit*/, Float_t dx, Float_t dy)
306 FirstPad(xhit, yhit, dx, dy);
308 //----------------------------------------------------------------------
309 void AliMUONSt345SlatSegmentation::NextPad()
311 // Stepper for the iteration over pads
313 // Step to next pad in the integration region
314 // step from left to right
317 GetPadC(fIx,fIy,fX,fY);
318 fSector=Sector(fIx,fIy);
320 } else if (fIy != fIymax) {
323 GetPadC(fIx,fIy,fX,fY);
324 fSector=Sector(fIx,fIy);
330 // printf("\n Next Pad %d %d %f %f %d %d %d %d %d ",
332 //-------------------------------------------------------------------------
333 Int_t AliMUONSt345SlatSegmentation::MorePads()
335 // Stopping condition for the iterator over pads
337 // Are there more pads in the integration region
339 return (fIx != -1 || fIy != -1);
341 //--------------------------------------------------------------------------
342 Int_t AliMUONSt345SlatSegmentation::Sector(Int_t ix, Int_t iy)
345 // Determine segmentation zone from pad coordinates
348 for (Int_t i=0; i < fNsec; i++) {
349 if (ix <= fNpxS[i]) {
354 if (isec == -1) printf("\n Sector: Attention isec ! %d %d %d %d \n",
355 fId, ix, iy,fNpxS[3]);
360 //-----------------------------------------------------------------------------
361 void AliMUONSt345SlatSegmentation::
362 IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
364 // Returns integration limits for current pad
366 x1=fXhit-fX-Dpx(fSector)/2.;
368 y1=fYhit-fY-Dpy(fSector)/2.;
370 // printf("\n Integration Limits %f %f %f %f %d %f", x1, x2, y1, y2, fSector, Dpx(fSector));
373 //-----------------------------------------------------------------------------
374 void AliMUONSt345SlatSegmentation::
375 Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10])
377 // Returns list of next neighbours for given Pad (iX, iY)
389 Int_t sector = Sector(iX,iY);
391 if (iY+1 <= fNpyS[sector]) {
403 //--------------------------------------------------------------------------
404 void AliMUONSt345SlatSegmentation::Init(Int_t detectionElementId)
407 // Fill the arrays fCx (x-contour) and fNpxS (ix-contour) for each sector
408 // These arrays help in converting from real to pad co-ordinates and
411 // Segmentation is defined by rectangular modules approximating
412 // concentric circles as shown below
414 // PCB module size in cm
415 // printf("\n Initialise Segmentation SlatModule \n");
418 printf(" fBending: %d \n",fBending);
423 // Calculate padsize along x
424 (*fDpxD)[fNsec-1]=fDpx;
425 (*fDpyD)[fNsec-1]=fDpy;
427 for (Int_t i=fNsec-1; i>=0; i--){ // fNsec-2
430 (*fDpyD)[i]=(*fDpyD)[fNsec-1]/(*fNDiv)[i];
432 (*fDpxD)[i]=(*fDpxD)[fNsec-1]/(*fNDiv)[i];
438 // fill the arrays defining the pad segmentation boundaries
441 // Loop over sectors (isec=0 for secto close to the beam pipe)
442 Float_t totalLength = 0;
443 for (Int_t isec=0; isec<4; isec++) totalLength += fPcbBoards[isec]*fDxPCB; // !!!!
445 fNpy = 0; // maximum number of pads in y
446 for (Int_t isec=0; isec<4; isec++) {
450 fCx[0] = -totalLength/2;
452 fNpxS[isec] = fNpxS[isec-1] + fPcbBoards[isec]*Int_t(fDxPCB/(*fDpxD)[isec]);
453 fNpyS[isec] = Int_t(fDyPCB/(*fDpyD)[isec]);
454 if (fNpyS[isec] >= fNpy) fNpy = fNpyS[isec];
455 fCx[isec]= fCx[isec-1] + fPcbBoards[isec]*fDxPCB;
459 fNpx = fNpxS[3]; // maximum number of pads in x
462 fId = detectionElementId;