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. *
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14 **************************************************************************/
18 /// \class AliMUONSt345SlatSegmentation
19 /// \brief Segmentation classes for slat modules
21 /// This class works with local coordinates
22 /// of the slats via the class AliMUONGeometrySegmentation
23 /// This class contains the size of the slats and the
24 /// and the differents PCB densities.
25 /// (from old AliMUONSegmentationSlatModule)
27 /// Add electronics mapping - Christian, Subatech, Mai 05
29 /// \author Gines Martinez, Subatech, Nov04
33 #include "AliMUONSt345SlatSegmentation.h"
37 ClassImp(AliMUONSt345SlatSegmentation)
40 AliMUONSt345SlatSegmentation::AliMUONSt345SlatSegmentation()
41 : AliMUONVGeometryDESegmentation(),
74 /// Default constructor
75 AliDebug(1,Form("this=%p default (empty) ctor",this));
78 //___________________________________________
79 AliMUONSt345SlatSegmentation::AliMUONSt345SlatSegmentation(Bool_t bending)
80 : AliMUONVGeometryDESegmentation(),
113 /// Standard constructor
115 fNsec = 4; // 4 sector densities at most per slat
116 fNDiv = new TArrayI(fNsec);
117 fDpxD = new TArrayF(fNsec);
118 fDpyD = new TArrayF(fNsec);
119 (*fNDiv)[0]=(*fNDiv)[1]=(*fNDiv)[2]=(*fNDiv)[3]=0;
120 (*fDpxD)[0]=(*fDpxD)[1]=(*fDpxD)[2]=(*fDpxD)[3]=0;
121 (*fDpyD)[0]=(*fDpyD)[1]=(*fDpyD)[2]=(*fDpyD)[3]=0;
122 AliDebug(1,Form("this=%p ctor for bending=%d",this,fBending));
125 //----------------------------------------------------------------------
126 AliMUONSt345SlatSegmentation::~AliMUONSt345SlatSegmentation()
130 AliDebug(1, Form("dtor this = %p", this));
137 //------------------------------------------------------------------------
138 Float_t AliMUONSt345SlatSegmentation::Distance2AndOffset(Int_t iX, Int_t iY, Float_t X, Float_t Y, Int_t * /*dummy*/)
140 /// Returns the square of the distance between 1 pad
141 /// labelled by its Channel numbers and a coordinate
145 return (x-X)*(x-X) + (y-Y)*(y-Y);
147 //____________________________________________________________________________
148 Float_t AliMUONSt345SlatSegmentation::Dpx(Int_t isec) const
150 /// Return x-strip width
152 return (*fDpxD)[isec];
155 //____________________________________________________________________________
156 Float_t AliMUONSt345SlatSegmentation::Dpy(Int_t isec) const
158 /// Return y-strip width
160 return (*fDpyD)[isec];
162 //_____________________________________________________________________________
163 Float_t AliMUONSt345SlatSegmentation::GetAnod(Float_t xhit) const
165 /// Returns for a hit position xhit the position of the nearest anode wire
167 Float_t wire= (xhit>0)? Int_t(xhit/fWireD)+0.5:Int_t(xhit/fWireD)-0.5;
171 //_____________________________________________________________________________
172 Bool_t AliMUONSt345SlatSegmentation::HasPad(Int_t ix, Int_t iy)
174 /// Return true if pas with given indices exists
176 if ( ix < 1 || ix > Npx() || iy < 1 || iy > Npy() )
180 Int_t isec = Sector(ix,iy);
185 if ( iy > fNpyS[isec] )
192 //--------------------------------------------------------------------------------
193 void AliMUONSt345SlatSegmentation::GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y)
195 /// Returns real coordinates (x,y) for given pad coordinates (ix,iy)
197 if (ix < 1 || ix > Npx() || iy < 1 || iy > Npy() ){
198 AliWarning(Form("ix %d or iy %d out of boundaries: Npx=%d and Npy=%d",ix, iy, Npx(), Npy()));
204 Int_t isec = Sector(ix,iy);
205 if (isec == -1) AliWarning(Form("isector = %d with ix %d, iy %d", isec, ix, iy));
206 if (iy > fNpyS[isec]) {
211 x = fCx[isec-1]+(ix-fNpxS[isec-1])*(*fDpxD)[isec];
212 x = x-(*fDpxD)[isec]/2;
213 y = Float_t(iy*(*fDpyD)[isec])-(*fDpyD)[isec]/2.- fCy; // !!!
221 //_____________________________________________________________________________
222 void AliMUONSt345SlatSegmentation::GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy)
224 /// Returns pad coordinates (ix,iy) for given real coordinates (x,y)
228 for (Int_t i=fNsec-1; i > 0; i--) {
231 if (TMath::Abs(fCx[isec] - fCx[isec-1]) <0.1 && isec > 1) isec--;
235 if (isec == -1) AliWarning(Form("isector equal to %d with xl %f, yl %f", isec, x, y));
237 ix= Int_t((x-fCx[isec-1])/(*fDpxD)[isec])
239 iy= Int_t((y+fCy)/(*fDpyD)[isec])+1;
240 } else if (isec == 0) {
241 ix= Int_t(x/(*fDpxD)[isec])+1;
242 iy= Int_t((y+fCy)/(*fDpyD)[isec])+1;
248 //-------------------------------------------------------------------------
249 void AliMUONSt345SlatSegmentation::GetPadI(Float_t x, Float_t y , Float_t /*z*/, Int_t &ix, Int_t &iy)
251 /// Returns pad coordinates (ix,iy) for given real coordinates (x,y)
253 GetPadI(x, y, ix, iy);
257 //_______________________________________________________________
258 void AliMUONSt345SlatSegmentation::SetPadDivision(Int_t ndiv[4])
260 /// Defines the pad size perp. to the anode wire (y) for different sectors.
261 /// Pad sizes are defined as integral fractions ndiv of a basis pad size
264 for (Int_t i=0; i<4; i++) {
269 //____________________________________________________________________________
270 void AliMUONSt345SlatSegmentation::SetPadSize(Float_t p1, Float_t p2)
277 //_______________________________________________________________
278 void AliMUONSt345SlatSegmentation::SetPcbBoards(Int_t n[4])
280 /// Set PcbBoard segmentation zones for each density
281 /// n[0] slat type parameter
282 /// n[1] PcbBoards for highest density sector fNDiv[1] etc ...
286 for (Int_t i=0; i<4; i++) fPcbBoards[i]=n[i];
289 //-------------------------------------------------------------------------
290 void AliMUONSt345SlatSegmentation::SetPad(Int_t ix, Int_t iy)
292 /// Sets virtual pad coordinates, needed for evaluating pad response
293 /// outside the tracking program
295 GetPadC(ix,iy,fX,fY);
296 fSector=Sector(ix,iy);
298 //---------------------------------------------------------------------------
299 void AliMUONSt345SlatSegmentation::SetHit(Float_t x, Float_t y)
306 if (x < fCx[0]) fXhit = fCx[0];
307 if (y < -fDyPCB/2.) fYhit = -fDyPCB/2.;
309 if (x > fCx[fNsec-1]) fXhit = fCx[fNsec-1];
310 if (y > fDyPCB/2.) fYhit = fDyPCB/2.;
313 //----------------------------------------------------------------------------
314 void AliMUONSt345SlatSegmentation::SetHit(Float_t xhit, Float_t yhit, Float_t /*zhit*/)
321 //----------------------------------------------------------
322 void AliMUONSt345SlatSegmentation::FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy)
324 /// Initialises iteration over pads for charge distribution algorithm
327 // Find the wire position (center of charge distribution)
328 Float_t x0a = GetAnod(xhit);
332 // and take fNsigma*sigma around this center
333 Float_t x01 = x0a - dx ;
334 Float_t x02 = x0a + dx;
335 Float_t y01 = yhit - dy;
336 Float_t y02 = yhit + dy;
338 // check the limits after adding (fNsigma*sigma)
339 if (x01 < fCx[0]) x01 = fCx[0];
340 if (y01 < -fDyPCB/2) y01 = -fDyPCB/2;
342 if (x02 >= fCx[fNsec-1]) x02 = fCx[fNsec-1]; // still ok ? (CF)
343 if (y02 >= fDyPCB/2.) y02 = fDyPCB/2.;
347 for (Int_t i=fNsec-1; i > 0; i--) {
348 if (x02 >= fCx[i-1]) {
350 if (TMath::Abs(fCx[isec] - fCx[isec-1]) < 0.1 && isec > 1) isec--;
355 // y02 += Dpy(isec);// why ? (CF)
358 // find the pads over which the charge distributes
359 GetPadI(x01,y01,fIxmin,fIymin);
360 GetPadI(x02,y02,fIxmax,fIymax);
362 if (fIxmax > fNpx) fIxmax=fNpx;
363 if (fIymax > fNpyS[isec]) fIymax = fNpyS[isec];
364 if (fIxmin < 1) fIxmin = 1; // patch for the moment (Ch. Finck)
365 if (fIymin < 1) fIymin = 1;
373 // Set current pad to lower left corner
374 if (fIxmax < fIxmin) fIxmax = fIxmin;
375 if (fIymax < fIymin) fIymax = fIymin;
379 GetPadC(fIx,fIy,fX,fY);
380 fSector = Sector(fIx,fIy);
382 AliDebug(4,Form("xhit,yhit,dx,dy=%e,%e,%e,%e ix,iy=%3d,%3d",
383 xhit,yhit,dx,dy,fIx,fIy));
386 //----------------------------------------------------------------------
387 void AliMUONSt345SlatSegmentation::FirstPad(Float_t xhit, Float_t yhit, Float_t /*zhit*/, Float_t dx, Float_t dy)
389 /// Initialises iteration over pads for charge distribution algorithm
391 FirstPad(xhit, yhit, dx, dy);
393 //----------------------------------------------------------------------
394 void AliMUONSt345SlatSegmentation::NextPad()
396 /// Stepper for the iteration over pads
398 // Step to next pad in the integration region
399 // step from left to right
402 GetPadC(fIx,fIy,fX,fY);
403 fSector=Sector(fIx,fIy);
405 } else if (fIy != fIymax) {
408 GetPadC(fIx,fIy,fX,fY);
409 fSector=Sector(fIx,fIy);
415 //-------------------------------------------------------------------------
416 Int_t AliMUONSt345SlatSegmentation::MorePads()
418 /// Stopping condition for the iterator over pads
420 // Are there more pads in the integration region
422 return (fIx != -999 || fIy != -999);
424 //--------------------------------------------------------------------------
425 Int_t AliMUONSt345SlatSegmentation::Sector(Int_t ix, Int_t iy)
427 /// Determine segmentation zone from pad coordinates
430 for (Int_t i = 0; i < fNsec; i++) {
431 if (ix <= fNpxS[i]) {
436 if (isec == -1) AliWarning(Form("Sector = %d with ix %d and iy %d, Npx %d",
437 isec, ix, iy, fNpx));
442 //-----------------------------------------------------------------------------
443 void AliMUONSt345SlatSegmentation::
444 IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
446 /// Returns integration limits for current pad
448 x1=fXhit-fX-Dpx(fSector)/2.;
450 y1=fYhit-fY-Dpy(fSector)/2.;
453 AliDebug(4,Form("xhit,yhit=%e,%e x,y=%e,%e, x1,x2,y1,y2=%e,%e,%e,%e",fXhit,fYhit,fX,fY,x1,x2,y1,y2));
456 //-----------------------------------------------------------------------------
457 void AliMUONSt345SlatSegmentation::
458 Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10])
460 /// Returns list of next neighbours for given Pad (iX, iY)
473 Int_t sector = Sector(iX,iY);
475 if (iY+1 <= fNpyS[sector]) {
487 //--------------------------------------------------------------------------
488 void AliMUONSt345SlatSegmentation::Init(Int_t detectionElementId)
490 /// Fill the arrays fCx (x-contour) and fNpxS (ix-contour) for each sector
491 /// These arrays help in converting from real to pad co-ordinates and
494 /// Segmentation is defined by rectangular modules approximating
495 /// concentric circles as shown below
497 // PCB module size in cm
498 // printf("\n Initialise Segmentation SlatModule \n");
501 // printf(" fBending: %d \n",fBending);
503 if (fInitDone) return; // security if init is already done in AliMUONFactory
507 // Calculate padsize along x
508 (*fDpxD)[fNsec-1]=fDpx;
509 (*fDpyD)[fNsec-1]=fDpy;
511 for (Int_t i=fNsec-1; i>=0; i--){ // fNsec-2
514 (*fDpyD)[i]=(*fDpyD)[fNsec-1]/(*fNDiv)[i];
516 (*fDpxD)[i]=(*fDpxD)[fNsec-1]/(*fNDiv)[i];
522 // fill the arrays defining the pad segmentation boundaries
525 // Loop over sectors (isec=0 for secto close to the beam pipe)
526 Float_t totalLength = 0;
527 for (Int_t isec=0; isec<4; isec++) totalLength += fPcbBoards[isec]*fDxPCB; // !!!!
529 fNpy = 0; // maximum number of pads in y
530 for (Int_t isec=0; isec<4; isec++) {
534 fCx[0] = -totalLength/2;
536 fNpxS[isec] = fNpxS[isec-1] + fPcbBoards[isec]*Int_t(fDxPCB/(*fDpxD)[isec]+0.5);
537 fNpyS[isec] = Int_t(fDyPCB/(*fDpyD)[isec]+0.5);
538 if (fNpyS[isec] >= fNpy) fNpy = fNpyS[isec];
539 fCx[isec]= fCx[isec-1] + fPcbBoards[isec]*fDxPCB;
543 fNpx = fNpxS[3]; // maximum number of pads in x
546 fId = detectionElementId;