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 Revision 1.15 2001/09/07 08:38:30 hristov
19 Pointers initialised to 0 in the default constructors
21 Revision 1.14 2001/08/30 09:52:12 hristov
22 The operator[] is replaced by At() or AddAt() in case of TObjArray.
24 Revision 1.13 2001/07/20 10:03:14 morsch
25 Changes needed to work with Root 3.01 (substitute lhs [] operator). (Jiri Chudoba)
27 Revision 1.12 2001/05/16 14:57:17 alibrary
28 New files for folders and Stack
30 Revision 1.11 2001/01/26 21:25:48 morsch
31 Empty default constructors and.
33 Revision 1.10 2001/01/23 18:58:19 hristov
34 Initialisation of some pointers
36 Revision 1.9 2001/01/17 20:53:40 hristov
37 Destructors corrected to avoid memory leaks
39 Revision 1.8 2000/12/21 22:12:41 morsch
40 Clean-up of coding rule violations,
42 Revision 1.7 2000/11/08 13:01:40 morsch
43 Chamber half-planes of stations 3-5 at different z-positions.
45 Revision 1.6 2000/11/06 09:20:43 morsch
46 AliMUON delegates part of BuildGeometry() to AliMUONSegmentation using the
47 Draw() method. This avoids code and parameter replication.
49 Revision 1.5 2000/10/23 13:37:40 morsch
50 Correct z-position of slat planes.
52 Revision 1.4 2000/10/22 16:55:43 morsch
53 Use only x-symmetry in global to local transformations and delegation.
55 Revision 1.3 2000/10/18 11:42:06 morsch
56 - AliMUONRawCluster contains z-position.
57 - Some clean-up of useless print statements during initialisations.
59 Revision 1.2 2000/10/09 14:06:18 morsch
60 Some type cast problems of type (TMath::Sign((Float_t)1.,x)) corrected (P.H.)
62 Revision 1.1 2000/10/06 09:00:47 morsch
63 Segmentation class for chambers built out of slats.
67 #include "AliMUONSegmentationSlat.h"
68 #include "AliMUONSegmentationSlatModule.h"
70 #include "AliMUONChamber.h"
72 #include "TObjArray.h"
77 #include <TGeometry.h>
80 //___________________________________________
81 ClassImp(AliMUONSegmentationSlat)
83 AliMUONSegmentationSlat::AliMUONSegmentationSlat()
85 // Default constructor
92 AliMUONSegmentationSlat::AliMUONSegmentationSlat(Int_t nsec)
94 // Non default constructor
96 fNDiv = new TArrayI(4);
101 AliMUONSegmentationSlat::~AliMUONSegmentationSlat(){
102 //PH Delete TObjArrays
114 void AliMUONSegmentationSlat::SetPadSize(Float_t p1, Float_t p2)
116 // Sets the pad (strip) size
122 Float_t AliMUONSegmentationSlat::GetAnod(Float_t xhit) const
124 // Returns for a hit position xhit the position of the nearest anode wire
125 Float_t wire= (xhit>0)? Int_t(xhit/fWireD)+0.5:Int_t(xhit/fWireD)-0.5;
129 Float_t AliMUONSegmentationSlat::Dpx(Int_t isec) const
132 // Returns x-pad size for given sector isec
133 // isec = 100*islat+iregion
135 Int_t islat, iregion;
138 return Slat(islat)->Dpx(iregion);
141 Float_t AliMUONSegmentationSlat::Dpy(Int_t isec) const
144 // Returns y-pad (strip) size for given sector isec
148 void AliMUONSegmentationSlat::SetPadDivision(Int_t ndiv[4])
151 // Defines the pad size perp. to the anode wire (y) for different sectors.
152 // Pad sizes are defined as integral fractions ndiv of a basis pad size
155 for (Int_t i=0; i<4; i++) {
160 void AliMUONSegmentationSlat::GlobalToLocal(
161 Float_t x, Float_t y, Float_t z, Int_t &islat, Float_t &xlocal, Float_t &ylocal)
164 // Perform local to global transformation for space coordinates
169 // Transform According to slat plane z-position: negative side is shifted down
170 // positive side is shifted up
171 // by half the overlap
172 zlocal = z-fChamber->Z();
173 zlocal = (x>0) ? zlocal-2.*fDz : zlocal+2.*fDz;
174 // Set the signs for the symmetry transformation and transform to first quadrant
176 Float_t xabs=TMath::Abs(x);
178 Int_t ifirst = (zlocal < Float_t(0))? 0:1;
181 for (i=ifirst; i<fNSlats; i+=2) {
183 if ((y >= fYPosition[i]) && (y <= fYPosition[i]+fSlatY)) break;
187 // Transform to local coordinate system
190 ylocal = y -fYPosition[index];
191 xlocal = xabs-fXPosition[index];
193 if (i >= fNSlats) {islat = -1; x=-1; y = -1;}
196 void AliMUONSegmentationSlat::GlobalToLocal(
197 Int_t ix, Int_t iy, Int_t &islat, Int_t &ixlocal, Int_t &iylocal)
200 // Perform global to local transformation for pad coordinates
208 // Find slat number (index) and iylocal
209 for (Int_t i=0; i<fNSlats; i++) {
210 iytemp-=Slat(i)->Npy();
213 if (iytemp <= 0) break;
218 ixlocal=TMath::Abs(ix);
222 void AliMUONSegmentationSlat::
223 LocalToGlobal(Int_t islat, Float_t xlocal, Float_t ylocal, Float_t &x, Float_t &y, Float_t &z)
225 // Transform from local to global space coordinates
227 // upper plane (y>0) even slat number is shifted down
228 // upper plane (y>0) odd slat number is shifted up
229 // lower plane (y<0) even slat number is shifted up
230 // lower plane (y<0) odd slat number is shifted down
233 x = (xlocal+fXPosition[islat])*fSym;
234 y=(ylocal+fYPosition[islat]);
236 z = (TMath::Even(islat)) ? -fDz : fDz ;
237 z = (x>0) ? z+2.*fDz : z-2.*fDz ;
243 void AliMUONSegmentationSlat::LocalToGlobal(
244 Int_t islat, Int_t ixlocal, Int_t iylocal, Int_t &ix, Int_t &iy)
246 // Transform from local to global pad coordinates
252 // Find slat number (index) and iylocal
253 for (i=0; i<islat; i++) iy+=Slat(islat)->Npy();
260 void AliMUONSegmentationSlat::SetSymmetry(Int_t ix)
262 // Set set signs for symmetry transformation
263 fSym=TMath::Sign(1,ix);
266 void AliMUONSegmentationSlat::SetSymmetry(Float_t x)
268 // Set set signs for symmetry transformation
269 fSym=Int_t (TMath::Sign((Float_t)1.,x));
272 void AliMUONSegmentationSlat::
273 GetPadI(Float_t x, Float_t y, Float_t z, Int_t &ix, Int_t &iy)
275 // Returns pad coordinates for given set of space coordinates
278 Float_t xlocal, ylocal;
280 GlobalToLocal(x,y,z,islat,xlocal,ylocal);
285 Slat(islat)->GetPadI(xlocal, ylocal, ix, iy);
286 for (i=0; i<islat; i++) iy+=Slat(islat)->Npy();
288 ix=ix*Int_t(TMath::Sign((Float_t)1.,x));
292 void AliMUONSegmentationSlat::
293 GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y, Float_t &z)
295 // Returns real coordinates (x,y) for given pad coordinates (ix,iy)
297 Int_t islat, ixlocal, iylocal;
299 // Delegation of transforamtion to slat
300 GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
301 Slat(islat)->GetPadC(ixlocal, iylocal, x, y);
303 x+=fXPosition[islat];
304 y+=fYPosition[islat];
306 // Symmetry transformation of half planes
307 x=x*TMath::Sign(1,ix);
310 z = (TMath::Even(islat)) ? -fDz : fDz ;
311 z = (x>0) ? z+2.*fDz : z-2.*fDz ;
315 Int_t AliMUONSegmentationSlat::ISector()
317 // Returns current sector during tracking
320 iregion = fCurrentSlat->ISector();
321 return 100*fSlatIndex+iregion;
324 Int_t AliMUONSegmentationSlat::Sector(Int_t ix, Int_t iy)
326 // Returns sector for pad coordiantes (ix,iy)
327 Int_t ixlocal, iylocal, iregion, islat;
329 GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
331 iregion = Slat(islat)->Sector(ixlocal, iylocal);
332 return 100*islat+iregion;
336 void AliMUONSegmentationSlat::SetPad(Int_t ix, Int_t iy)
339 // Sets virtual pad coordinates, needed for evaluating pad response
340 // outside the tracking program
341 Int_t islat, ixlocal, iylocal;
345 GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
347 fCurrentSlat=Slat(islat);
348 fCurrentSlat->SetPad(ixlocal, iylocal);
351 void AliMUONSegmentationSlat::SetHit(Float_t xhit, Float_t yhit, Float_t zhit)
353 // Sets current hit coordinates
355 Float_t xlocal, ylocal;
360 GlobalToLocal(xhit,yhit,zhit,islat,xlocal,ylocal);
362 if (islat < 0) printf("\n SetHit: %d", islat);
364 fCurrentSlat=Slat(islat);
365 fCurrentSlat->SetHit(xlocal, ylocal);
369 void AliMUONSegmentationSlat::
370 FirstPad(Float_t xhit, Float_t yhit, Float_t zhit, Float_t dx, Float_t dy)
372 // Initialises iteration over pads for charge distribution algorithm
378 Float_t xlocal, ylocal;
379 GlobalToLocal(xhit, yhit, zhit, islat, xlocal, ylocal);
381 fCurrentSlat=Slat(islat);
382 fCurrentSlat->FirstPad(xlocal, ylocal, dx, dy);
387 void AliMUONSegmentationSlat::NextPad()
389 // Stepper for the iteration over pads
391 fCurrentSlat->NextPad();
395 Int_t AliMUONSegmentationSlat::MorePads()
396 // Stopping condition for the iterator over pads
398 // Are there more pads in the integration region
400 return fCurrentSlat->MorePads();
403 void AliMUONSegmentationSlat::
404 IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
406 // Returns integration limits for current pad
409 fCurrentSlat->IntegrationLimits(x1, x2, y1, y2);
413 void AliMUONSegmentationSlat::
414 Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10])
416 // Returns list of neighbours of pad with coordinates iX, iY
418 Int_t i, xListLocal[10], yListLocal[10], iXlocal, iYlocal, islat;
422 GlobalToLocal(iX, iY, islat, iXlocal, iYlocal);
424 Slat(islat)->Neighbours(iXlocal, iYlocal, Nlist, xListLocal, yListLocal);
426 for (i=0; i<*Nlist; i++) LocalToGlobal(islat, xListLocal[i], yListLocal[i], Xlist[i], Ylist[i]);
431 Int_t AliMUONSegmentationSlat::Ix()
433 // Return current pad coordinate ix during stepping
435 ixl=fCurrentSlat->Ix();
436 iyl=fCurrentSlat->Iy();
438 LocalToGlobal(fSlatIndex, ixl, iyl, ix, iy);
441 GlobalToLocal(ix, iy, isc, ixc, iyc);
442 Slat(isc)->GetPadC(ixc,iyc,xc,yc);
447 Int_t AliMUONSegmentationSlat::Iy()
449 // Return current pad coordinate iy during stepping
451 ixl=fCurrentSlat->Ix();
452 iyl=fCurrentSlat->Iy();
453 LocalToGlobal(fSlatIndex, ixl, iyl, ix, iy);
459 // Signal Generation Condition during Stepping
460 Int_t AliMUONSegmentationSlat::SigGenCond(Float_t x, Float_t y, Float_t z)
463 // True if signal generation condition fullfilled
464 Float_t xlocal, ylocal;
466 GlobalToLocal(x, y, z, islat, xlocal, ylocal);
467 return Slat(islat)->SigGenCond(xlocal, ylocal, z);
470 // Initialise signal generation at coord (x,y,z)
471 void AliMUONSegmentationSlat::SigGenInit(Float_t x, Float_t y, Float_t z)
473 // Initialize the signal generation condition
475 Float_t xlocal, ylocal;
478 GlobalToLocal(x, y, z, islat, xlocal, ylocal);
479 Slat(islat)->SigGenInit(xlocal, ylocal, z);
484 void AliMUONSegmentationSlat::Init(Int_t chamber)
487 // Initialize slat modules of quadrant +/+
488 // The other three quadrants are handled through symmetry transformations
490 //printf("\n Initialise Segmentation Slat \n");
493 // Initialize Slat modules
497 for (i=0; i<4; i++) ndiv[i]=(*fNDiv)[i];
502 for (i=0; i<15; i++) fSlatX[i]=0.;
504 // Initialize array of slats
505 fSlats = new TObjArray(fNSlats);
506 // Maximum number of strips (pads) in x and y
509 // for each slat in the quadrant (+,+)
510 for (islat=0; islat<fNSlats; islat++) {
511 fSlats->AddAt(CreateSlatModule(),islat);
513 AliMUONSegmentationSlatModule *slat = Slat(islat);
518 slat->SetPadSize(fDpx, fDpy);
519 // Forward wire pitch
520 slat->SetDAnod(fWireD);
521 // Foward segmentation
522 slat->SetPadDivision(ndiv);
523 slat->SetPcbBoards(fPcb[islat]);
524 // Initialize slat module
526 // y-position of slat module relative to the first (closest to the beam)
527 fYPosition[islat]= fYPosOrigin+islat*(fSlatY-2.*fShift);
530 if (slat->Npx() > fNpx) fNpx=slat->Npx();
532 for (isec=0; isec< 4; isec++)
534 fSlatX[islat]+=40.*fPcb[islat][isec];
538 // Set parent chamber number
539 AliMUON *pMUON = (AliMUON *) gAlice->GetModule("MUON");
540 fChamber=&(pMUON->Chamber(chamber));
548 void AliMUONSegmentationSlat::SetNPCBperSector(Int_t *npcb)
550 // PCB distribution for station 4 (6 rows with 1+3 segmentation regions)
551 for (Int_t islat=0; islat<fNSlats; islat++){
552 fPcb[islat][0] = *(npcb + 4 * islat);
553 fPcb[islat][1] = *(npcb + 4 * islat + 1);
554 fPcb[islat][2] = *(npcb + 4 * islat + 2);
555 fPcb[islat][3] = *(npcb + 4 * islat + 3);
560 void AliMUONSegmentationSlat::SetSlatXPositions(Float_t *xpos)
562 // Set x-positions of Slats
563 for (Int_t islat=0; islat<fNSlats; islat++) fXPosition[islat]=xpos[islat];
566 AliMUONSegmentationSlatModule* AliMUONSegmentationSlat::Slat(Int_t index) const
567 //PH { return ((AliMUONSegmentationSlatModule*) (*fSlats)[index]);}
568 { return ((AliMUONSegmentationSlatModule*) fSlats->At(index));}
571 AliMUONSegmentationSlatModule* AliMUONSegmentationSlat::
574 // Factory method for slat module
575 return new AliMUONSegmentationSlatModule(4);
579 void AliMUONSegmentationSlat::Draw(const char* opt) const
581 // Draw method for event display
583 if (!strcmp(opt,"eventdisplay")) {
584 const int kColorMUON1 = kYellow;
585 const int kColorMUON2 = kBlue;
587 // Drawing Routines for example for Event Display
590 char nameChamber[9], nameSlat[9], nameNode[9];
593 // Number of modules per slat
594 for (i=0; i<fNSlats; i++) {
596 for (j=0; j<4; j++) npcb[i]+=fPcb[i][j];
599 TNode* top=gAlice->GetGeometry()->GetNode("alice");
600 sprintf(nameChamber,"C_MUON%d",fId+1);
601 new TBRIK(nameChamber,"Mother","void",340,340,5.);
603 sprintf(nameNode,"MUON%d",100+fId+1);
604 TNode* node = new TNode(nameNode,"Chambernode",nameChamber,0,0,fChamber->Z(),"");
606 node->SetLineColor(kBlack);
607 AliMUON *pMUON = (AliMUON *) gAlice->GetModule("MUON");
608 (pMUON->Nodes())->Add(node);
612 for (j=0; j<fNSlats; j++)
614 sprintf(nameSlat,"SLAT%d",100*fId+1+j);
615 Float_t dx = 20.*npcb[j];
617 new TBRIK(nameSlat,"Slat Module","void",dx,20.,0.25);
619 color = TMath::Even(j) ? kColorMUON1 : kColorMUON2;
621 sprintf(nameNode,"SLAT%d",100*fId+1+j);
623 new TNode(nameNode,"Slat Module",nameSlat, dx+fXPosition[j],fYPosition[j]+dy,0,"");
624 nodeSlat->SetLineColor(color);
626 sprintf(nameNode,"SLAT%d",100*fId+1+j+fNSlats);
628 new TNode(nameNode,"Slat Module",nameSlat,-dx-fXPosition[j],fYPosition[j]+dy,0,"");
629 nodeSlat->SetLineColor(color);