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 1.17 2001/12/01 20:00:45 hristov
21 Revision 1.16 2001/10/30 08:25:14 jchudoba
22 Small correction to prevent crash when hit is at the edge of a slat
24 Revision 1.15 2001/09/07 08:38:30 hristov
25 Pointers initialised to 0 in the default constructors
27 Revision 1.14 2001/08/30 09:52:12 hristov
28 The operator[] is replaced by At() or AddAt() in case of TObjArray.
30 Revision 1.13 2001/07/20 10:03:14 morsch
31 Changes needed to work with Root 3.01 (substitute lhs [] operator). (Jiri Chudoba)
33 Revision 1.12 2001/05/16 14:57:17 alibrary
34 New files for folders and Stack
36 Revision 1.11 2001/01/26 21:25:48 morsch
37 Empty default constructors and.
39 Revision 1.10 2001/01/23 18:58:19 hristov
40 Initialisation of some pointers
42 Revision 1.9 2001/01/17 20:53:40 hristov
43 Destructors corrected to avoid memory leaks
45 Revision 1.8 2000/12/21 22:12:41 morsch
46 Clean-up of coding rule violations,
48 Revision 1.7 2000/11/08 13:01:40 morsch
49 Chamber half-planes of stations 3-5 at different z-positions.
51 Revision 1.6 2000/11/06 09:20:43 morsch
52 AliMUON delegates part of BuildGeometry() to AliMUONSegmentation using the
53 Draw() method. This avoids code and parameter replication.
55 Revision 1.5 2000/10/23 13:37:40 morsch
56 Correct z-position of slat planes.
58 Revision 1.4 2000/10/22 16:55:43 morsch
59 Use only x-symmetry in global to local transformations and delegation.
61 Revision 1.3 2000/10/18 11:42:06 morsch
62 - AliMUONRawCluster contains z-position.
63 - Some clean-up of useless print statements during initialisations.
65 Revision 1.2 2000/10/09 14:06:18 morsch
66 Some type cast problems of type (TMath::Sign((Float_t)1.,x)) corrected (P.H.)
68 Revision 1.1 2000/10/06 09:00:47 morsch
69 Segmentation class for chambers built out of slats.
73 #include "AliMUONSegmentationSlat.h"
74 #include "AliMUONSegmentationSlatModule.h"
76 #include "AliMUONChamber.h"
78 #include "TObjArray.h"
83 #include <TGeometry.h>
86 //___________________________________________
87 ClassImp(AliMUONSegmentationSlat)
89 AliMUONSegmentationSlat::AliMUONSegmentationSlat()
91 // Default constructor
98 AliMUONSegmentationSlat::AliMUONSegmentationSlat(Int_t nsec)
100 // Non default constructor
102 fNDiv = new TArrayI(4);
107 AliMUONSegmentationSlat::~AliMUONSegmentationSlat(){
108 //PH Delete TObjArrays
120 void AliMUONSegmentationSlat::SetPadSize(Float_t p1, Float_t p2)
122 // Sets the pad (strip) size
128 Float_t AliMUONSegmentationSlat::GetAnod(Float_t xhit) const
130 // Returns for a hit position xhit the position of the nearest anode wire
131 Float_t wire= (xhit>0)? Int_t(xhit/fWireD)+0.5:Int_t(xhit/fWireD)-0.5;
135 Float_t AliMUONSegmentationSlat::Dpx(Int_t isec) const
138 // Returns x-pad size for given sector isec
139 // isec = 100*islat+iregion
141 Int_t islat, iregion;
144 return Slat(islat)->Dpx(iregion);
147 Float_t AliMUONSegmentationSlat::Dpy(Int_t isec) const
150 // Returns y-pad (strip) size for given sector isec
154 void AliMUONSegmentationSlat::SetPadDivision(Int_t ndiv[4])
157 // Defines the pad size perp. to the anode wire (y) for different sectors.
158 // Pad sizes are defined as integral fractions ndiv of a basis pad size
161 for (Int_t i=0; i<4; i++) {
166 void AliMUONSegmentationSlat::GlobalToLocal(
167 Float_t x, Float_t y, Float_t z, Int_t &islat, Float_t &xlocal, Float_t &ylocal)
170 // Perform local to global transformation for space coordinates
177 // Transform According to slat plane z-position: negative side is shifted down
178 // positive side is shifted up
179 // by half the overlap
180 zlocal = z-fChamber->Z();
181 zlocal = (x>0) ? zlocal-2.*fDz : zlocal+2.*fDz;
182 // Set the signs for the symmetry transformation and transform to first quadrant
184 Float_t xabs=TMath::Abs(x);
186 Int_t ifirst = (zlocal < Float_t(0))? 0:1;
189 for (i=ifirst; i<fNSlats; i+=2) {
191 if ((y >= fYPosition[i]-eps) && (y <= fYPosition[i]+fSlatY+eps)) break;
195 // Transform to local coordinate system
198 if (index >= fNSlats || index < 0 ) {
199 islat = -1; xlocal=-1; ylocal = -1; }
201 ylocal = y -fYPosition[index];
202 xlocal = xabs-fXPosition[index];
207 void AliMUONSegmentationSlat::GlobalToLocal(
208 Int_t ix, Int_t iy, Int_t &islat, Int_t &ixlocal, Int_t &iylocal)
211 // Perform global to local transformation for pad coordinates
219 // Find slat number (index) and iylocal
220 for (Int_t i=0; i<fNSlats; i++) {
221 iytemp-=Slat(i)->Npy();
224 if (iytemp <= 0) break;
229 ixlocal=TMath::Abs(ix);
233 void AliMUONSegmentationSlat::
234 LocalToGlobal(Int_t islat, Float_t xlocal, Float_t ylocal, Float_t &x, Float_t &y, Float_t &z)
236 // Transform from local to global space coordinates
238 // upper plane (y>0) even slat number is shifted down
239 // upper plane (y>0) odd slat number is shifted up
240 // lower plane (y<0) even slat number is shifted up
241 // lower plane (y<0) odd slat number is shifted down
244 x = (xlocal+fXPosition[islat])*fSym;
245 y=(ylocal+fYPosition[islat]);
247 z = (TMath::Even(islat)) ? -fDz : fDz ;
248 z = (x>0) ? z+2.*fDz : z-2.*fDz ;
254 void AliMUONSegmentationSlat::LocalToGlobal(
255 Int_t islat, Int_t ixlocal, Int_t iylocal, Int_t &ix, Int_t &iy)
257 // Transform from local to global pad coordinates
263 // Find slat number (index) and iylocal
264 for (i=0; i<islat; i++) iy+=Slat(islat)->Npy();
271 void AliMUONSegmentationSlat::SetSymmetry(Int_t ix)
273 // Set set signs for symmetry transformation
274 fSym=TMath::Sign(1,ix);
277 void AliMUONSegmentationSlat::SetSymmetry(Float_t x)
279 // Set set signs for symmetry transformation
280 fSym=Int_t (TMath::Sign((Float_t)1.,x));
283 void AliMUONSegmentationSlat::
284 GetPadI(Float_t x, Float_t y, Float_t z, Int_t &ix, Int_t &iy)
286 // Returns pad coordinates for given set of space coordinates
289 Float_t xlocal, ylocal;
291 GlobalToLocal(x,y,z,islat,xlocal,ylocal);
296 Slat(islat)->GetPadI(xlocal, ylocal, ix, iy);
297 for (i=0; i<islat; i++) iy+=Slat(islat)->Npy();
299 ix=ix*Int_t(TMath::Sign((Float_t)1.,x));
303 void AliMUONSegmentationSlat::
304 GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y, Float_t &z)
306 // Returns real coordinates (x,y) for given pad coordinates (ix,iy)
308 Int_t islat, ixlocal, iylocal;
310 // Delegation of transforamtion to slat
311 GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
312 Slat(islat)->GetPadC(ixlocal, iylocal, x, y);
314 x+=fXPosition[islat];
315 y+=fYPosition[islat];
317 // Symmetry transformation of half planes
318 x=x*TMath::Sign(1,ix);
321 z = (TMath::Even(islat)) ? -fDz : fDz ;
322 z = (x>0) ? z+2.*fDz : z-2.*fDz ;
326 Int_t AliMUONSegmentationSlat::ISector()
328 // Returns current sector during tracking
331 iregion = fCurrentSlat->ISector();
332 return 100*fSlatIndex+iregion;
335 Int_t AliMUONSegmentationSlat::Sector(Int_t ix, Int_t iy)
337 // Returns sector for pad coordiantes (ix,iy)
338 Int_t ixlocal, iylocal, iregion, islat;
340 GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
342 iregion = Slat(islat)->Sector(ixlocal, iylocal);
343 return 100*islat+iregion;
347 void AliMUONSegmentationSlat::SetPad(Int_t ix, Int_t iy)
350 // Sets virtual pad coordinates, needed for evaluating pad response
351 // outside the tracking program
352 Int_t islat, ixlocal, iylocal;
356 GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
358 fCurrentSlat=Slat(islat);
359 fCurrentSlat->SetPad(ixlocal, iylocal);
362 void AliMUONSegmentationSlat::SetHit(Float_t xhit, Float_t yhit, Float_t zhit)
364 // Sets current hit coordinates
366 Float_t xlocal, ylocal;
371 GlobalToLocal(xhit,yhit,zhit,islat,xlocal,ylocal);
373 if (islat < 0) printf("\n SetHit: %d", islat);
375 fCurrentSlat=Slat(islat);
376 fCurrentSlat->SetHit(xlocal, ylocal);
380 void AliMUONSegmentationSlat::
381 FirstPad(Float_t xhit, Float_t yhit, Float_t zhit, Float_t dx, Float_t dy)
383 // Initialises iteration over pads for charge distribution algorithm
388 Float_t xlocal, ylocal;
389 GlobalToLocal(xhit, yhit, zhit, islat, xlocal, ylocal);
392 fCurrentSlat=Slat(islat);
393 fCurrentSlat->FirstPad(xlocal, ylocal, dx, dy);
399 void AliMUONSegmentationSlat::NextPad()
401 // Stepper for the iteration over pads
403 fCurrentSlat->NextPad();
407 Int_t AliMUONSegmentationSlat::MorePads()
408 // Stopping condition for the iterator over pads
410 // Are there more pads in the integration region
412 return fCurrentSlat->MorePads();
415 void AliMUONSegmentationSlat::
416 IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
418 // Returns integration limits for current pad
421 fCurrentSlat->IntegrationLimits(x1, x2, y1, y2);
425 void AliMUONSegmentationSlat::
426 Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10])
428 // Returns list of neighbours of pad with coordinates iX, iY
430 Int_t i, xListLocal[10], yListLocal[10], iXlocal, iYlocal, islat;
434 GlobalToLocal(iX, iY, islat, iXlocal, iYlocal);
436 Slat(islat)->Neighbours(iXlocal, iYlocal, Nlist, xListLocal, yListLocal);
438 for (i=0; i<*Nlist; i++) LocalToGlobal(islat, xListLocal[i], yListLocal[i], Xlist[i], Ylist[i]);
443 Int_t AliMUONSegmentationSlat::Ix()
445 // Return current pad coordinate ix during stepping
447 ixl=fCurrentSlat->Ix();
448 iyl=fCurrentSlat->Iy();
450 LocalToGlobal(fSlatIndex, ixl, iyl, ix, iy);
453 GlobalToLocal(ix, iy, isc, ixc, iyc);
454 Slat(isc)->GetPadC(ixc,iyc,xc,yc);
459 Int_t AliMUONSegmentationSlat::Iy()
461 // Return current pad coordinate iy during stepping
463 ixl=fCurrentSlat->Ix();
464 iyl=fCurrentSlat->Iy();
465 LocalToGlobal(fSlatIndex, ixl, iyl, ix, iy);
471 // Signal Generation Condition during Stepping
472 Int_t AliMUONSegmentationSlat::SigGenCond(Float_t x, Float_t y, Float_t z)
475 // True if signal generation condition fullfilled
476 Float_t xlocal, ylocal;
478 GlobalToLocal(x, y, z, islat, xlocal, ylocal);
479 return Slat(islat)->SigGenCond(xlocal, ylocal, z);
482 // Initialise signal generation at coord (x,y,z)
483 void AliMUONSegmentationSlat::SigGenInit(Float_t x, Float_t y, Float_t z)
485 // Initialize the signal generation condition
487 Float_t xlocal, ylocal;
490 GlobalToLocal(x, y, z, islat, xlocal, ylocal);
491 Slat(islat)->SigGenInit(xlocal, ylocal, z);
496 void AliMUONSegmentationSlat::Init(Int_t chamber)
499 // Initialize slat modules of quadrant +/+
500 // The other three quadrants are handled through symmetry transformations
502 //printf("\n Initialise Segmentation Slat \n");
505 // Initialize Slat modules
509 for (i=0; i<4; i++) ndiv[i]=(*fNDiv)[i];
514 for (i=0; i<15; i++) fSlatX[i]=0.;
516 // Initialize array of slats
517 fSlats = new TObjArray(fNSlats);
518 // Maximum number of strips (pads) in x and y
521 // for each slat in the quadrant (+,+)
522 for (islat=0; islat<fNSlats; islat++) {
523 fSlats->AddAt(CreateSlatModule(),islat);
525 AliMUONSegmentationSlatModule *slat = Slat(islat);
530 slat->SetPadSize(fDpx, fDpy);
531 // Forward wire pitch
532 slat->SetDAnod(fWireD);
533 // Foward segmentation
534 slat->SetPadDivision(ndiv);
535 slat->SetPcbBoards(fPcb[islat]);
536 // Initialize slat module
538 // y-position of slat module relative to the first (closest to the beam)
539 fYPosition[islat]= fYPosOrigin+islat*(fSlatY-2.*fShift);
542 if (slat->Npx() > fNpx) fNpx=slat->Npx();
544 for (isec=0; isec< 4; isec++)
546 fSlatX[islat]+=40.*fPcb[islat][isec];
550 // Set parent chamber number
551 AliMUON *pMUON = (AliMUON *) gAlice->GetModule("MUON");
552 fChamber=&(pMUON->Chamber(chamber));
560 void AliMUONSegmentationSlat::SetNPCBperSector(Int_t *npcb)
562 // PCB distribution for station 4 (6 rows with 1+3 segmentation regions)
563 for (Int_t islat=0; islat<fNSlats; islat++){
564 fPcb[islat][0] = *(npcb + 4 * islat);
565 fPcb[islat][1] = *(npcb + 4 * islat + 1);
566 fPcb[islat][2] = *(npcb + 4 * islat + 2);
567 fPcb[islat][3] = *(npcb + 4 * islat + 3);
572 void AliMUONSegmentationSlat::SetSlatXPositions(Float_t *xpos)
574 // Set x-positions of Slats
575 for (Int_t islat=0; islat<fNSlats; islat++) fXPosition[islat]=xpos[islat];
578 AliMUONSegmentationSlatModule* AliMUONSegmentationSlat::Slat(Int_t index) const
579 //PH { return ((AliMUONSegmentationSlatModule*) (*fSlats)[index]);}
580 { return ((AliMUONSegmentationSlatModule*) fSlats->At(index));}
583 AliMUONSegmentationSlatModule* AliMUONSegmentationSlat::
586 // Factory method for slat module
587 return new AliMUONSegmentationSlatModule(4);
591 void AliMUONSegmentationSlat::Draw(const char* opt) const
593 // Draw method for event display
595 if (!strcmp(opt,"eventdisplay")) {
596 const int kColorMUON1 = kYellow;
597 const int kColorMUON2 = kBlue;
599 // Drawing Routines for example for Event Display
602 char nameChamber[9], nameSlat[9], nameNode[9];
605 // Number of modules per slat
606 for (i=0; i<fNSlats; i++) {
608 for (j=0; j<4; j++) npcb[i]+=fPcb[i][j];
611 TNode* top=gAlice->GetGeometry()->GetNode("alice");
612 sprintf(nameChamber,"C_MUON%d",fId+1);
613 new TBRIK(nameChamber,"Mother","void",340,340,5.);
615 sprintf(nameNode,"MUON%d",100+fId+1);
616 TNode* node = new TNode(nameNode,"Chambernode",nameChamber,0,0,fChamber->Z(),"");
618 node->SetLineColor(kBlack);
619 AliMUON *pMUON = (AliMUON *) gAlice->GetModule("MUON");
620 (pMUON->Nodes())->Add(node);
624 for (j=0; j<fNSlats; j++)
626 sprintf(nameSlat,"SLAT%d",100*fId+1+j);
627 Float_t dx = 20.*npcb[j];
629 new TBRIK(nameSlat,"Slat Module","void",dx,20.,0.25);
631 color = TMath::Even(j) ? kColorMUON1 : kColorMUON2;
633 sprintf(nameNode,"SLAT%d",100*fId+1+j);
635 new TNode(nameNode,"Slat Module",nameSlat, dx+fXPosition[j],fYPosition[j]+dy,0,"");
636 nodeSlat->SetLineColor(color);
638 sprintf(nameNode,"SLAT%d",100*fId+1+j+fNSlats);
640 new TNode(nameNode,"Slat Module",nameSlat,-dx-fXPosition[j],fYPosition[j]+dy,0,"");
641 nodeSlat->SetLineColor(color);