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()
38 : AliMUONVGeometryDESegmentation(),
56 // Non default constructor
57 fNsec = 4; // 4 sector densities at most per slat
58 fNDiv = new TArrayI(fNsec);
59 fDpxD = new TArrayF(fNsec);
60 (*fNDiv)[0]=(*fNDiv)[1]=(*fNDiv)[2]=(*fNDiv)[3]=0;
61 (*fDpxD)[0]=(*fDpxD)[1]=(*fDpxD)[2]=(*fDpxD)[3]=0;
63 //----------------------------------------------------------------------
64 AliMUONSt345SlatSegmentation::AliMUONSt345SlatSegmentation(const AliMUONSt345SlatSegmentation& rhs) : AliMUONVGeometryDESegmentation(rhs)
66 AliFatal("Not implemented.");
68 //----------------------------------------------------------------------
69 AliMUONSt345SlatSegmentation::~AliMUONSt345SlatSegmentation()
72 if (fNDiv) delete fNDiv;
73 if (fDpxD) delete fDpxD;
75 //----------------------------------------------------------------------
76 AliMUONSt345SlatSegmentation& AliMUONSt345SlatSegmentation::operator=(const AliMUONSt345SlatSegmentation& rhs)
78 // Protected assignement operator
79 if (this == &rhs) return *this;
80 AliFatal("Not implemented.");
85 //------------------------------------------------------------------------
86 Float_t AliMUONSt345SlatSegmentation::Distance2AndOffset(Int_t iX, Int_t iY, Float_t X, Float_t Y, Int_t * /*dummy*/)
88 // Returns the square of the distance between 1 pad
89 // labelled by its Channel numbers and a coordinate
92 return (x-X)*(x-X) + (y-Y)*(y-Y);
94 //____________________________________________________________________________
95 Float_t AliMUONSt345SlatSegmentation::Dpx(Int_t isec) const
97 // Return x-strip width
98 return (*fDpxD)[isec];
101 //____________________________________________________________________________
102 Float_t AliMUONSt345SlatSegmentation::Dpy(Int_t /*isec*/) const
104 // Return y-strip width
107 //_____________________________________________________________________________
108 Float_t AliMUONSt345SlatSegmentation::GetAnod(Float_t xhit) const
110 // Returns for a hit position xhit the position of the nearest anode wire
111 Float_t wire= (xhit>0)? Int_t(xhit/fWireD)+0.5:Int_t(xhit/fWireD)-0.5;
114 //_____________________________________________________________________________
115 void AliMUONSt345SlatSegmentation::GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy)
117 // Returns pad coordinates (ix,iy) for given real coordinates (x,y)
118 iy = Int_t((y+fCy)/fDpy)+1; // !!!
119 if (iy > fNpy) iy= fNpy;
123 for (Int_t i=fNsec-1; i > 0; i--) {
126 if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
132 ix= Int_t((x-fCx[isec-1])/(*fDpxD)[isec])
134 } else if (isec == 0) {
135 ix= Int_t(x/(*fDpxD)[isec])+1;
141 //--------------------------------------------------------------------------------
142 void AliMUONSt345SlatSegmentation::GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y)
144 if (ix<1 || ix>Npx() || iy<1 || iy>Npy() ){
145 AliWarning(Form("ix or iy out of boundaries: Npx=%d and Npy=%d",Npx(),Npy()));
146 x=-99999.; y=-99999.;
149 // Returns real coordinates (x,y) for given pad coordinates (ix,iy)
150 y = Float_t(iy*fDpy)-fDpy/2.- fCy; // !!!
152 Int_t isec = Sector(ix,iy);
153 if (isec == -1) printf("\n PadC %d %d %d %d \n ", isec, fId, ix, iy);
155 x = fCx[isec-1]+(ix-fNpxS[isec-1])*(*fDpxD)[isec];
156 x = x-(*fDpxD)[isec]/2;
162 //-------------------------------------------------------------------------
163 void AliMUONSt345SlatSegmentation::GetPadI(Float_t x, Float_t y , Float_t /*z*/, Int_t &ix, Int_t &iy)
165 GetPadI(x, y, ix, iy);
167 //_______________________________________________________________
168 void AliMUONSt345SlatSegmentation::SetPadDivision(Int_t ndiv[4])
170 // Defines the pad size perp. to the anode wire (y) for different sectors.
171 // Pad sizes are defined as integral fractions ndiv of a basis pad size
174 for (Int_t i=0; i<4; i++) {
179 //____________________________________________________________________________
180 void AliMUONSt345SlatSegmentation::SetPadSize(Float_t p1, Float_t p2)
186 //_______________________________________________________________
187 void AliMUONSt345SlatSegmentation::SetPcbBoards(Int_t n[4])
190 // Set PcbBoard segmentation zones for each density
191 // n[0] PcbBoards for maximum density sector fNDiv[0]
192 // n[1] PcbBoards for next density sector fNDiv[1] etc ...
193 for (Int_t i=0; i<4; i++) fPcbBoards[i]=n[i];
195 //-------------------------------------------------------------------------
196 void AliMUONSt345SlatSegmentation::SetPad(Int_t ix, Int_t iy)
199 // Sets virtual pad coordinates, needed for evaluating pad response
200 // outside the tracking program
201 GetPadC(ix,iy,fX,fY);
202 fSector=Sector(ix,iy);
204 //---------------------------------------------------------------------------
205 void AliMUONSt345SlatSegmentation::SetHit(Float_t x, Float_t y)
212 if (x < 0) fXhit = 0;
213 if (y < 0) fYhit = 0;
215 if (x >= fCx[fNsec-1]) fXhit = fCx[fNsec-1];
216 if (y >= fDyPCB) fYhit = fDyPCB;
219 //----------------------------------------------------------------------------
220 void AliMUONSt345SlatSegmentation::SetHit(Float_t xhit, Float_t yhit, Float_t /*zhit*/)
224 //----------------------------------------------------------
225 void AliMUONSt345SlatSegmentation::FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy)
227 // Initialises iteration over pads for charge distribution algorithm
230 // Find the wire position (center of charge distribution)
231 Float_t x0a=GetAnod(xhit);
235 // and take fNsigma*sigma around this center
236 Float_t x01=x0a - dx;
237 Float_t x02=x0a + dx;
238 Float_t y01=yhit - dy;
239 Float_t y02=yhit + dy;
240 if (x01 < 0) x01 = 0;
241 if (y01 < 0) y01 = 0;
243 if (x02 >= fCx[fNsec-1]) x02 = fCx[fNsec-1];
247 for (Int_t i=fNsec-1; i > 0; i--) {
248 if (x02 >= fCx[i-1]) {
250 if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
255 if (y02 >= fDyPCB) y02 = fDyPCB;
258 // find the pads over which the charge distributes
259 GetPadI(x01,y01,fIxmin,fIymin);
260 GetPadI(x02,y02,fIxmax,fIymax);
262 if (fIxmax > fNpx) fIxmax=fNpx;
263 if (fIymax > fNpyS[isec]) fIymax = fNpyS[isec];
271 // Set current pad to lower left corner
272 if (fIxmax < fIxmin) fIxmax=fIxmin;
273 if (fIymax < fIymin) fIymax=fIymin;
277 GetPadC(fIx,fIy,fX,fY);
278 fSector=Sector(fIx,fIy);
280 printf("\n \n First Pad: %d %d %f %f %d %d %d %f" ,
281 fIxmin, fIxmax, fXmin, fXmax, fNpx, fId, isec, Dpy(isec));
282 printf("\n \n First Pad: %d %d %f %f %d %d %d %f",
283 fIymin, fIymax, fYmin, fYmax, fNpyS[isec], fId, isec, Dpy(isec));
286 //----------------------------------------------------------------------
287 void AliMUONSt345SlatSegmentation::FirstPad(Float_t xhit, Float_t yhit, Float_t /*zhit*/, Float_t dx, Float_t dy)
289 FirstPad(xhit, yhit, dx, dy);
291 //----------------------------------------------------------------------
292 void AliMUONSt345SlatSegmentation::NextPad()
294 // Stepper for the iteration over pads
296 // Step to next pad in the integration region
297 // step from left to right
300 GetPadC(fIx,fIy,fX,fY);
301 fSector=Sector(fIx,fIy);
303 } else if (fIy != fIymax) {
306 GetPadC(fIx,fIy,fX,fY);
307 fSector=Sector(fIx,fIy);
313 // printf("\n Next Pad %d %d %f %f %d %d %d %d %d ",
315 //-------------------------------------------------------------------------
316 Int_t AliMUONSt345SlatSegmentation::MorePads()
318 // Stopping condition for the iterator over pads
320 // Are there more pads in the integration region
322 return (fIx != -1 || fIy != -1);
324 //--------------------------------------------------------------------------
325 Int_t AliMUONSt345SlatSegmentation::Sector(Int_t ix, Int_t iy)
328 // Determine segmentation zone from pad coordinates
331 for (Int_t i=0; i < fNsec; i++) {
332 if (ix <= fNpxS[i]) {
337 if (isec == -1) printf("\n Sector: Attention isec ! %d %d %d %d \n",
338 fId, ix, iy,fNpxS[3]);
343 //-----------------------------------------------------------------------------
344 void AliMUONSt345SlatSegmentation::
345 IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
347 // Returns integration limits for current pad
349 x1=fXhit-fX-Dpx(fSector)/2.;
351 y1=fYhit-fY-Dpy(fSector)/2.;
353 // printf("\n Integration Limits %f %f %f %f %d %f", x1, x2, y1, y2, fSector, Dpx(fSector));
356 //-----------------------------------------------------------------------------
357 void AliMUONSt345SlatSegmentation::
358 Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10])
360 // Returns list of next neighbours for given Pad (iX, iY)
384 //--------------------------------------------------------------------------
385 void AliMUONSt345SlatSegmentation::Init(Int_t detectionElementId)
388 // Fill the arrays fCx (x-contour) and fNpxS (ix-contour) for each sector
389 // These arrays help in converting from real to pad co-ordinates and
392 // Segmentation is defined by rectangular modules approximating
393 // concentric circles as shown below
395 // PCB module size in cm
396 // printf("\n Initialise Segmentation SlatModule \n");
401 // number of pad rows per PCB
403 Int_t nPyPCB=Int_t(fDyPCB/fDpy);
405 // maximum number of pad rows
408 // Calculate padsize along x
409 (*fDpxD)[fNsec-1]=fDpx;
411 for (Int_t i=fNsec-1; i>=0; i--){ // fNsec-2
412 (*fDpxD)[i]=(*fDpxD)[fNsec-1]/(*fNDiv)[i];
416 // fill the arrays defining the pad segmentation boundaries
419 // Loop over sectors (isec=0 for secto close to the bema pipe)
420 Float_t totalLength = 0;
421 for (Int_t isec=0; isec<4; isec++) totalLength += fPcbBoards[isec]*fDxPCB; // !!!!
423 for (Int_t isec=0; isec<4; isec++) {
427 fCx[0] = -totalLength/2;
429 fNpxS[isec]=fNpxS[isec-1] + fPcbBoards[isec]*Int_t(fDxPCB/(*fDpxD)[isec]);
431 fCx[isec]= fCx[isec-1] + fPcbBoards[isec]*fDxPCB;
434 // maximum number of pad rows
439 fId = detectionElementId;