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 1.10 2001/01/23 18:58:19 hristov
19 Initialisation of some pointers
21 Revision 1.9 2001/01/17 20:53:40 hristov
22 Destructors corrected to avoid memory leaks
24 Revision 1.8 2000/12/21 22:12:41 morsch
25 Clean-up of coding rule violations,
27 Revision 1.7 2000/11/08 13:01:40 morsch
28 Chamber half-planes of stations 3-5 at different z-positions.
30 Revision 1.6 2000/11/06 09:20:43 morsch
31 AliMUON delegates part of BuildGeometry() to AliMUONSegmentation using the
32 Draw() method. This avoids code and parameter replication.
34 Revision 1.5 2000/10/23 13:37:40 morsch
35 Correct z-position of slat planes.
37 Revision 1.4 2000/10/22 16:55:43 morsch
38 Use only x-symmetry in global to local transformations and delegation.
40 Revision 1.3 2000/10/18 11:42:06 morsch
41 - AliMUONRawCluster contains z-position.
42 - Some clean-up of useless print statements during initialisations.
44 Revision 1.2 2000/10/09 14:06:18 morsch
45 Some type cast problems of type (TMath::Sign((Float_t)1.,x)) corrected (P.H.)
47 Revision 1.1 2000/10/06 09:00:47 morsch
48 Segmentation class for chambers built out of slats.
52 #include "AliMUONSegmentationSlat.h"
53 #include "AliMUONSegmentationSlatModule.h"
55 #include "AliMUONChamber.h"
57 #include "TObjArray.h"
62 #include <TGeometry.h>
65 //___________________________________________
66 ClassImp(AliMUONSegmentationSlat)
68 AliMUONSegmentationSlat::AliMUONSegmentationSlat()
70 // Default constructor
73 AliMUONSegmentationSlat::AliMUONSegmentationSlat(Int_t nsec)
75 // Non default constructor
77 fNDiv = new TArrayI(4);
82 AliMUONSegmentationSlat::~AliMUONSegmentationSlat(){
83 //PH Delete TObjArrays
95 void AliMUONSegmentationSlat::SetPadSize(Float_t p1, Float_t p2)
97 // Sets the pad (strip) size
103 Float_t AliMUONSegmentationSlat::GetAnod(Float_t xhit) const
105 // Returns for a hit position xhit the position of the nearest anode wire
106 Float_t wire= (xhit>0)? Int_t(xhit/fWireD)+0.5:Int_t(xhit/fWireD)-0.5;
110 Float_t AliMUONSegmentationSlat::Dpx(Int_t isec) const
113 // Returns x-pad size for given sector isec
114 // isec = 100*islat+iregion
116 Int_t islat, iregion;
119 return Slat(islat)->Dpx(iregion);
122 Float_t AliMUONSegmentationSlat::Dpy(Int_t isec) const
125 // Returns y-pad (strip) size for given sector isec
129 void AliMUONSegmentationSlat::SetPadDivision(Int_t ndiv[4])
132 // Defines the pad size perp. to the anode wire (y) for different sectors.
133 // Pad sizes are defined as integral fractions ndiv of a basis pad size
136 for (Int_t i=0; i<4; i++) {
141 void AliMUONSegmentationSlat::GlobalToLocal(
142 Float_t x, Float_t y, Float_t z, Int_t &islat, Float_t &xlocal, Float_t &ylocal)
145 // Perform local to global transformation for space coordinates
150 // Transform According to slat plane z-position: negative side is shifted down
151 // positive side is shifted up
152 // by half the overlap
153 zlocal = z-fChamber->Z();
154 zlocal = (x>0) ? zlocal-2.*fDz : zlocal+2.*fDz;
155 // Set the signs for the symmetry transformation and transform to first quadrant
157 Float_t xabs=TMath::Abs(x);
159 Int_t ifirst = (zlocal < Float_t(0))? 0:1;
162 for (i=ifirst; i<fNSlats; i+=2) {
164 if ((y >= fYPosition[i]) && (y < fYPosition[i]+fSlatY)) break;
168 // Transform to local coordinate system
171 ylocal = y -fYPosition[index];
172 xlocal = xabs-fXPosition[index];
174 if (i >= fNSlats) {islat = -1; x=-1; y = -1;}
177 void AliMUONSegmentationSlat::GlobalToLocal(
178 Int_t ix, Int_t iy, Int_t &islat, Int_t &ixlocal, Int_t &iylocal)
181 // Perform global to local transformation for pad coordinates
189 // Find slat number (index) and iylocal
190 for (Int_t i=0; i<fNSlats; i++) {
191 iytemp-=Slat(i)->Npy();
194 if (iytemp <= 0) break;
199 ixlocal=TMath::Abs(ix);
203 void AliMUONSegmentationSlat::
204 LocalToGlobal(Int_t islat, Float_t xlocal, Float_t ylocal, Float_t &x, Float_t &y, Float_t &z)
206 // Transform from local to global space coordinates
208 // upper plane (y>0) even slat number is shifted down
209 // upper plane (y>0) odd slat number is shifted up
210 // lower plane (y<0) even slat number is shifted up
211 // lower plane (y<0) odd slat number is shifted down
214 x = (xlocal+fXPosition[islat])*fSym;
215 y=(ylocal+fYPosition[islat]);
217 z = (TMath::Even(islat)) ? -fDz : fDz ;
218 z = (x>0) ? z+2.*fDz : z-2.*fDz ;
224 void AliMUONSegmentationSlat::LocalToGlobal(
225 Int_t islat, Int_t ixlocal, Int_t iylocal, Int_t &ix, Int_t &iy)
227 // Transform from local to global pad coordinates
233 // Find slat number (index) and iylocal
234 for (i=0; i<islat; i++) iy+=Slat(islat)->Npy();
241 void AliMUONSegmentationSlat::SetSymmetry(Int_t ix)
243 // Set set signs for symmetry transformation
244 fSym=TMath::Sign(1,ix);
247 void AliMUONSegmentationSlat::SetSymmetry(Float_t x)
249 // Set set signs for symmetry transformation
250 fSym=Int_t (TMath::Sign((Float_t)1.,x));
253 void AliMUONSegmentationSlat::
254 GetPadI(Float_t x, Float_t y, Float_t z, Int_t &ix, Int_t &iy)
256 // Returns pad coordinates for given set of space coordinates
259 Float_t xlocal, ylocal;
261 GlobalToLocal(x,y,z,islat,xlocal,ylocal);
266 Slat(islat)->GetPadI(xlocal, ylocal, ix, iy);
267 for (i=0; i<islat; i++) iy+=Slat(islat)->Npy();
269 ix=ix*Int_t(TMath::Sign((Float_t)1.,x));
273 void AliMUONSegmentationSlat::
274 GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y, Float_t &z)
276 // Returns real coordinates (x,y) for given pad coordinates (ix,iy)
278 Int_t islat, ixlocal, iylocal;
280 // Delegation of transforamtion to slat
281 GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
282 Slat(islat)->GetPadC(ixlocal, iylocal, x, y);
284 x+=fXPosition[islat];
285 y+=fYPosition[islat];
287 // Symmetry transformation of half planes
288 x=x*TMath::Sign(1,ix);
291 z = (TMath::Even(islat)) ? -fDz : fDz ;
292 z = (x>0) ? z+2.*fDz : z-2.*fDz ;
296 Int_t AliMUONSegmentationSlat::ISector()
298 // Returns current sector during tracking
301 iregion = fCurrentSlat->ISector();
302 return 100*fSlatIndex+iregion;
305 Int_t AliMUONSegmentationSlat::Sector(Int_t ix, Int_t iy)
307 // Returns sector for pad coordiantes (ix,iy)
308 Int_t ixlocal, iylocal, iregion, islat;
310 GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
312 iregion = Slat(islat)->Sector(ixlocal, iylocal);
313 return 100*islat+iregion;
317 void AliMUONSegmentationSlat::SetPad(Int_t ix, Int_t iy)
320 // Sets virtual pad coordinates, needed for evaluating pad response
321 // outside the tracking program
322 Int_t islat, ixlocal, iylocal;
326 GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
328 fCurrentSlat=Slat(islat);
329 fCurrentSlat->SetPad(ixlocal, iylocal);
332 void AliMUONSegmentationSlat::SetHit(Float_t xhit, Float_t yhit, Float_t zhit)
334 // Sets current hit coordinates
336 Float_t xlocal, ylocal;
341 GlobalToLocal(xhit,yhit,zhit,islat,xlocal,ylocal);
343 if (islat < 0) printf("\n SetHit: %d", islat);
345 fCurrentSlat=Slat(islat);
346 fCurrentSlat->SetHit(xlocal, ylocal);
350 void AliMUONSegmentationSlat::
351 FirstPad(Float_t xhit, Float_t yhit, Float_t zhit, Float_t dx, Float_t dy)
353 // Initialises iteration over pads for charge distribution algorithm
359 Float_t xlocal, ylocal;
360 GlobalToLocal(xhit, yhit, zhit, islat, xlocal, ylocal);
362 fCurrentSlat=Slat(islat);
363 fCurrentSlat->FirstPad(xlocal, ylocal, dx, dy);
368 void AliMUONSegmentationSlat::NextPad()
370 // Stepper for the iteration over pads
372 fCurrentSlat->NextPad();
376 Int_t AliMUONSegmentationSlat::MorePads()
377 // Stopping condition for the iterator over pads
379 // Are there more pads in the integration region
381 return fCurrentSlat->MorePads();
384 void AliMUONSegmentationSlat::
385 IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
387 // Returns integration limits for current pad
390 fCurrentSlat->IntegrationLimits(x1, x2, y1, y2);
394 void AliMUONSegmentationSlat::
395 Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10])
397 // Returns list of neighbours of pad with coordinates iX, iY
399 Int_t i, xListLocal[10], yListLocal[10], iXlocal, iYlocal, islat;
403 GlobalToLocal(iX, iY, islat, iXlocal, iYlocal);
405 Slat(islat)->Neighbours(iXlocal, iYlocal, Nlist, xListLocal, yListLocal);
407 for (i=0; i<*Nlist; i++) LocalToGlobal(islat, xListLocal[i], yListLocal[i], Xlist[i], Ylist[i]);
412 Int_t AliMUONSegmentationSlat::Ix()
414 // Return current pad coordinate ix during stepping
416 ixl=fCurrentSlat->Ix();
417 iyl=fCurrentSlat->Iy();
419 LocalToGlobal(fSlatIndex, ixl, iyl, ix, iy);
422 GlobalToLocal(ix, iy, isc, ixc, iyc);
423 Slat(isc)->GetPadC(ixc,iyc,xc,yc);
428 Int_t AliMUONSegmentationSlat::Iy()
430 // Return current pad coordinate iy during stepping
432 ixl=fCurrentSlat->Ix();
433 iyl=fCurrentSlat->Iy();
434 LocalToGlobal(fSlatIndex, ixl, iyl, ix, iy);
440 // Signal Generation Condition during Stepping
441 Int_t AliMUONSegmentationSlat::SigGenCond(Float_t x, Float_t y, Float_t z)
444 // True if signal generation condition fullfilled
445 Float_t xlocal, ylocal;
447 GlobalToLocal(x, y, z, islat, xlocal, ylocal);
448 return Slat(islat)->SigGenCond(xlocal, ylocal, z);
451 // Initialise signal generation at coord (x,y,z)
452 void AliMUONSegmentationSlat::SigGenInit(Float_t x, Float_t y, Float_t z)
454 // Initialize the signal generation condition
456 Float_t xlocal, ylocal;
459 GlobalToLocal(x, y, z, islat, xlocal, ylocal);
460 Slat(islat)->SigGenInit(xlocal, ylocal, z);
465 void AliMUONSegmentationSlat::Init(Int_t chamber)
468 // Initialize slat modules of quadrant +/+
469 // The other three quadrants are handled through symmetry transformations
471 printf("\n Initialise Segmentation Slat \n");
474 // Initialize Slat modules
478 for (i=0; i<4; i++) ndiv[i]=(*fNDiv)[i];
483 for (i=0; i<15; i++) fSlatX[i]=0.;
485 // Initialize array of slats
486 fSlats = new TObjArray(fNSlats);
487 // Maximum number of strips (pads) in x and y
490 // for each slat in the quadrant (+,+)
491 for (islat=0; islat<fNSlats; islat++) {
492 (*fSlats)[islat] = CreateSlatModule();
494 AliMUONSegmentationSlatModule *slat = Slat(islat);
499 slat->SetPadSize(fDpx, fDpy);
500 // Forward wire pitch
501 slat->SetDAnod(fWireD);
502 // Foward segmentation
503 slat->SetPadDivision(ndiv);
504 slat->SetPcbBoards(fPcb[islat]);
505 // Initialize slat module
507 // y-position of slat module relative to the first (closest to the beam)
508 fYPosition[islat]= fYPosOrigin+islat*(fSlatY-2.*fShift);
511 if (slat->Npx() > fNpx) fNpx=slat->Npx();
513 for (isec=0; isec< 4; isec++)
515 fSlatX[islat]+=40.*fPcb[islat][isec];
519 // Set parent chamber number
520 AliMUON *pMUON = (AliMUON *) gAlice->GetModule("MUON");
521 fChamber=&(pMUON->Chamber(chamber));
529 void AliMUONSegmentationSlat::SetNPCBperSector(Int_t *npcb)
531 // PCB distribution for station 4 (6 rows with 1+3 segmentation regions)
532 for (Int_t islat=0; islat<fNSlats; islat++){
533 fPcb[islat][0] = *(npcb + 4 * islat);
534 fPcb[islat][1] = *(npcb + 4 * islat + 1);
535 fPcb[islat][2] = *(npcb + 4 * islat + 2);
536 fPcb[islat][3] = *(npcb + 4 * islat + 3);
541 void AliMUONSegmentationSlat::SetSlatXPositions(Float_t *xpos)
543 // Set x-positions of Slats
544 for (Int_t islat=0; islat<fNSlats; islat++) fXPosition[islat]=xpos[islat];
547 AliMUONSegmentationSlatModule* AliMUONSegmentationSlat::Slat(Int_t index) const
548 { return ((AliMUONSegmentationSlatModule*) (*fSlats)[index]);}
551 AliMUONSegmentationSlatModule* AliMUONSegmentationSlat::
554 // Factory method for slat module
555 return new AliMUONSegmentationSlatModule(4);
559 void AliMUONSegmentationSlat::Draw(const char* opt) const
561 // Draw method for event display
563 if (!strcmp(opt,"eventdisplay")) {
564 const int kColorMUON1 = kYellow;
565 const int kColorMUON2 = kBlue;
567 // Drawing Routines for example for Event Display
570 char nameChamber[9], nameSlat[9], nameNode[9];
573 // Number of modules per slat
574 for (i=0; i<fNSlats; i++) {
576 for (j=0; j<4; j++) npcb[i]+=fPcb[i][j];
579 TNode* top=gAlice->GetGeometry()->GetNode("alice");
580 sprintf(nameChamber,"C_MUON%d",fId+1);
581 new TBRIK(nameChamber,"Mother","void",340,340,5.);
583 sprintf(nameNode,"MUON%d",100+fId+1);
584 TNode* node = new TNode(nameNode,"Chambernode",nameChamber,0,0,fChamber->Z(),"");
586 node->SetLineColor(kBlack);
587 AliMUON *pMUON = (AliMUON *) gAlice->GetModule("MUON");
588 (pMUON->Nodes())->Add(node);
592 for (j=0; j<fNSlats; j++)
594 sprintf(nameSlat,"SLAT%d",100*fId+1+j);
595 Float_t dx = 20.*npcb[j];
597 new TBRIK(nameSlat,"Slat Module","void",dx,20.,0.25);
599 color = TMath::Even(j) ? kColorMUON1 : kColorMUON2;
601 sprintf(nameNode,"SLAT%d",100*fId+1+j);
603 new TNode(nameNode,"Slat Module",nameSlat, dx+fXPosition[j],fYPosition[j]+dy,0,"");
604 nodeSlat->SetLineColor(color);
606 sprintf(nameNode,"SLAT%d",100*fId+1+j+fNSlats);
608 new TNode(nameNode,"Slat Module",nameSlat,-dx-fXPosition[j],fYPosition[j]+dy,0,"");
609 nodeSlat->SetLineColor(color);