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 #include "AliMUONSegmentationSlat.h"
19 #include "AliMUONSegmentationSlatModule.h"
21 #include "AliMUONChamber.h"
23 #include "TObjArray.h"
28 #include <TGeometry.h>
29 #include <Riostream.h>
31 //___________________________________________
32 ClassImp(AliMUONSegmentationSlat)
34 AliMUONSegmentationSlat::AliMUONSegmentationSlat()
36 // Default constructor
43 AliMUONSegmentationSlat::AliMUONSegmentationSlat(Int_t nsec)
45 // Non default constructor
47 fNDiv = new TArrayI(4);
52 AliMUONSegmentationSlat::~AliMUONSegmentationSlat(){
53 //PH Delete TObjArrays
65 void AliMUONSegmentationSlat::SetPadSize(Float_t p1, Float_t p2)
67 // Sets the pad (strip) size
73 Float_t AliMUONSegmentationSlat::GetAnod(Float_t xhit) const
75 // Returns for a hit position xhit the position of the nearest anode wire
76 Float_t wire= (xhit>0)? Int_t(xhit/fWireD)+0.5:Int_t(xhit/fWireD)-0.5;
80 Float_t AliMUONSegmentationSlat::Dpx(Int_t isec) const
83 // Returns x-pad size for given sector isec
84 // isec = 100*islat+iregion
89 return Slat(islat)->Dpx(iregion);
92 Float_t AliMUONSegmentationSlat::Dpy(Int_t isec) const
95 // Returns y-pad (strip) size for given sector isec
99 void AliMUONSegmentationSlat::SetPadDivision(Int_t ndiv[4])
102 // Defines the pad size perp. to the anode wire (y) for different sectors.
103 // Pad sizes are defined as integral fractions ndiv of a basis pad size
106 for (Int_t i=0; i<4; i++) {
111 void AliMUONSegmentationSlat::GlobalToLocal(
112 Float_t x, Float_t y, Float_t z, Int_t &islat, Float_t &xlocal, Float_t &ylocal)
115 // Perform local to global transformation for space coordinates
122 // Transform According to slat plane z-position: negative side is shifted down
123 // positive side is shifted up
124 // by half the overlap
125 zlocal = z-fChamber->Z();
126 zlocal = (x>0) ? zlocal-2.*fDz : zlocal+2.*fDz;
127 // Set the signs for the symmetry transformation and transform to first quadrant
129 Float_t xabs=TMath::Abs(x);
131 Int_t ifirst = (zlocal < Float_t(0))? 0:1;
134 for (i=ifirst; i<fNSlats; i+=2) {
136 if ((y >= fYPosition[i]-eps) && (y <= fYPosition[i]+fSlatY+eps)) break;
140 // Transform to local coordinate system
143 if (index >= fNSlats || index < 0 ) {
144 islat = -1; xlocal=-1; ylocal = -1; }
146 ylocal = y -fYPosition[index];
147 xlocal = xabs-fXPosition[index];
152 void AliMUONSegmentationSlat::GlobalToLocal(
153 Int_t ix, Int_t iy, Int_t &islat, Int_t &ixlocal, Int_t &iylocal)
156 // Perform global to local transformation for pad coordinates
164 // Find slat number (index) and iylocal
165 for (Int_t i=0; i<fNSlats; i++) {
166 iytemp-=Slat(i)->Npy();
169 if (iytemp <= 0) break;
174 ixlocal=TMath::Abs(ix);
178 void AliMUONSegmentationSlat::
179 LocalToGlobal(Int_t islat, Float_t xlocal, Float_t ylocal, Float_t &x, Float_t &y, Float_t &z)
181 // Transform from local to global space coordinates
183 // upper plane (y>0) even slat number is shifted down
184 // upper plane (y>0) odd slat number is shifted up
185 // lower plane (y<0) even slat number is shifted up
186 // lower plane (y<0) odd slat number is shifted down
189 x = (xlocal+fXPosition[islat])*fSym;
190 y=(ylocal+fYPosition[islat]);
192 z = (TMath::Even(islat)) ? -fDz : fDz ;
193 z = (x>0) ? z+2.*fDz : z-2.*fDz ;
199 void AliMUONSegmentationSlat::LocalToGlobal(
200 Int_t islat, Int_t ixlocal, Int_t iylocal, Int_t &ix, Int_t &iy)
202 // Transform from local to global pad coordinates
208 // Find slat number (index) and iylocal
209 for (i=0; i<islat; i++) iy+=Slat(islat)->Npy();
216 void AliMUONSegmentationSlat::SetSymmetry(Int_t ix)
218 // Set set signs for symmetry transformation
219 fSym=TMath::Sign(1,ix);
222 void AliMUONSegmentationSlat::SetSymmetry(Float_t x)
224 // Set set signs for symmetry transformation
225 fSym=Int_t (TMath::Sign((Float_t)1.,x));
228 void AliMUONSegmentationSlat::
229 GetPadI(Float_t x, Float_t y, Float_t z, Int_t &ix, Int_t &iy)
231 // Returns pad coordinates for given set of space coordinates
234 Float_t xlocal, ylocal;
236 GlobalToLocal(x,y,z,islat,xlocal,ylocal);
241 Slat(islat)->GetPadI(xlocal, ylocal, ix, iy);
242 for (i=0; i<islat; i++) iy+=Slat(islat)->Npy();
244 ix=ix*Int_t(TMath::Sign((Float_t)1.,x));
248 void AliMUONSegmentationSlat::
249 GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y, Float_t &z)
251 // Returns real coordinates (x,y) for given pad coordinates (ix,iy)
253 Int_t islat, ixlocal, iylocal;
255 // Delegation of transforamtion to slat
256 GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
257 Slat(islat)->GetPadC(ixlocal, iylocal, x, y);
259 x+=fXPosition[islat];
260 y+=fYPosition[islat];
262 // Symmetry transformation of half planes
263 x=x*TMath::Sign(1,ix);
266 z = (TMath::Even(islat)) ? -fDz : fDz ;
267 z = (x>0) ? z+2.*fDz : z-2.*fDz ;
271 Int_t AliMUONSegmentationSlat::ISector()
273 // Returns current sector during tracking
276 iregion = fCurrentSlat->ISector();
277 return 100*fSlatIndex+iregion;
280 Int_t AliMUONSegmentationSlat::Sector(Int_t ix, Int_t iy)
282 // Returns sector for pad coordiantes (ix,iy)
283 Int_t ixlocal, iylocal, iregion, islat;
285 GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
287 iregion = Slat(islat)->Sector(ixlocal, iylocal);
288 return 100*islat+iregion;
292 void AliMUONSegmentationSlat::SetPad(Int_t ix, Int_t iy)
295 // Sets virtual pad coordinates, needed for evaluating pad response
296 // outside the tracking program
297 Int_t islat, ixlocal, iylocal;
301 GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
303 fCurrentSlat=Slat(islat);
304 fCurrentSlat->SetPad(ixlocal, iylocal);
307 void AliMUONSegmentationSlat::SetHit(Float_t xhit, Float_t yhit, Float_t zhit)
309 // Sets current hit coordinates
311 Float_t xlocal, ylocal;
316 GlobalToLocal(xhit,yhit,zhit,islat,xlocal,ylocal);
318 if (islat < 0) printf("\n SetHit: %d", islat);
320 fCurrentSlat=Slat(islat);
321 fCurrentSlat->SetHit(xlocal, ylocal);
325 void AliMUONSegmentationSlat::
326 FirstPad(Float_t xhit, Float_t yhit, Float_t zhit, Float_t dx, Float_t dy)
328 // Initialises iteration over pads for charge distribution algorithm
333 Float_t xlocal, ylocal;
334 GlobalToLocal(xhit, yhit, zhit, islat, xlocal, ylocal);
337 fCurrentSlat=Slat(islat);
338 fCurrentSlat->FirstPad(xlocal, ylocal, dx, dy);
344 void AliMUONSegmentationSlat::NextPad()
346 // Stepper for the iteration over pads
348 fCurrentSlat->NextPad();
352 Int_t AliMUONSegmentationSlat::MorePads()
353 // Stopping condition for the iterator over pads
355 // Are there more pads in the integration region
357 return fCurrentSlat->MorePads();
360 void AliMUONSegmentationSlat::
361 IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
363 // Returns integration limits for current pad
366 fCurrentSlat->IntegrationLimits(x1, x2, y1, y2);
370 void AliMUONSegmentationSlat::
371 Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10])
373 // Returns list of neighbours of pad with coordinates iX, iY
375 Int_t i, xListLocal[10], yListLocal[10], iXlocal, iYlocal, islat;
379 GlobalToLocal(iX, iY, islat, iXlocal, iYlocal);
381 Slat(islat)->Neighbours(iXlocal, iYlocal, Nlist, xListLocal, yListLocal);
383 for (i=0; i<*Nlist; i++) LocalToGlobal(islat, xListLocal[i], yListLocal[i], Xlist[i], Ylist[i]);
388 Int_t AliMUONSegmentationSlat::Ix()
390 // Return current pad coordinate ix during stepping
392 ixl=fCurrentSlat->Ix();
393 iyl=fCurrentSlat->Iy();
395 LocalToGlobal(fSlatIndex, ixl, iyl, ix, iy);
398 GlobalToLocal(ix, iy, isc, ixc, iyc);
399 Slat(isc)->GetPadC(ixc,iyc,xc,yc);
404 Int_t AliMUONSegmentationSlat::Iy()
406 // Return current pad coordinate iy during stepping
408 ixl=fCurrentSlat->Ix();
409 iyl=fCurrentSlat->Iy();
410 LocalToGlobal(fSlatIndex, ixl, iyl, ix, iy);
416 // Signal Generation Condition during Stepping
417 Int_t AliMUONSegmentationSlat::SigGenCond(Float_t x, Float_t y, Float_t z)
420 // True if signal generation condition fullfilled
421 Float_t xlocal, ylocal;
423 GlobalToLocal(x, y, z, islat, xlocal, ylocal);
424 return Slat(islat)->SigGenCond(xlocal, ylocal, z);
427 // Initialise signal generation at coord (x,y,z)
428 void AliMUONSegmentationSlat::SigGenInit(Float_t x, Float_t y, Float_t z)
430 // Initialize the signal generation condition
432 Float_t xlocal, ylocal;
435 GlobalToLocal(x, y, z, islat, xlocal, ylocal);
436 Slat(islat)->SigGenInit(xlocal, ylocal, z);
441 void AliMUONSegmentationSlat::Init(Int_t chamber)
444 // Initialize slat modules of quadrant +/+
445 // The other three quadrants are handled through symmetry transformations
447 //printf("\n Initialise Segmentation Slat \n");
450 // Initialize Slat modules
454 for (i=0; i<4; i++) ndiv[i]=(*fNDiv)[i];
459 for (i=0; i<15; i++) fSlatX[i]=0.;
461 // Initialize array of slats
462 fSlats = new TObjArray(fNSlats);
463 // Maximum number of strips (pads) in x and y
466 // for each slat in the quadrant (+,+)
467 for (islat=0; islat<fNSlats; islat++) {
468 fSlats->AddAt(CreateSlatModule(),islat);
470 AliMUONSegmentationSlatModule *slat = Slat(islat);
475 slat->SetPadSize(fDpx, fDpy);
476 // Forward wire pitch
477 slat->SetDAnod(fWireD);
478 // Foward segmentation
479 slat->SetPadDivision(ndiv);
480 slat->SetPcbBoards(fPcb[islat]);
481 // Initialize slat module
483 // y-position of slat module relative to the first (closest to the beam)
484 fYPosition[islat]= fYPosOrigin+islat*(fSlatY-2.*fShift);
487 if (slat->Npx() > fNpx) fNpx=slat->Npx();
489 for (isec=0; isec< 4; isec++)
491 fSlatX[islat]+=40.*fPcb[islat][isec];
495 // Set parent chamber number
496 AliMUON *pMUON = (AliMUON *) gAlice->GetModule("MUON");
497 fChamber=&(pMUON->Chamber(chamber));
505 void AliMUONSegmentationSlat::SetNPCBperSector(Int_t *npcb)
507 // PCB distribution for station 4 (6 rows with 1+3 segmentation regions)
508 for (Int_t islat=0; islat<fNSlats; islat++){
509 fPcb[islat][0] = *(npcb + 4 * islat);
510 fPcb[islat][1] = *(npcb + 4 * islat + 1);
511 fPcb[islat][2] = *(npcb + 4 * islat + 2);
512 fPcb[islat][3] = *(npcb + 4 * islat + 3);
517 void AliMUONSegmentationSlat::SetSlatXPositions(Float_t *xpos)
519 // Set x-positions of Slats
520 for (Int_t islat=0; islat<fNSlats; islat++) fXPosition[islat]=xpos[islat];
523 AliMUONSegmentationSlatModule* AliMUONSegmentationSlat::Slat(Int_t index) const
524 //PH { return ((AliMUONSegmentationSlatModule*) (*fSlats)[index]);}
525 { return ((AliMUONSegmentationSlatModule*) fSlats->At(index));}
528 AliMUONSegmentationSlatModule* AliMUONSegmentationSlat::
531 // Factory method for slat module
532 return new AliMUONSegmentationSlatModule(4);
536 void AliMUONSegmentationSlat::Draw(const char* opt) const
538 // Draw method for event display
540 if (!strcmp(opt,"eventdisplay")) {
541 const int kColorMUON1 = kYellow;
542 const int kColorMUON2 = kBlue;
544 // Drawing Routines for example for Event Display
547 char nameChamber[9], nameSlat[9], nameNode[9];
550 // Number of modules per slat
551 for (i=0; i<fNSlats; i++) {
553 for (j=0; j<4; j++) npcb[i]+=fPcb[i][j];
556 TNode* top=gAlice->GetGeometry()->GetNode("alice");
557 sprintf(nameChamber,"C_MUON%d",fId+1);
558 new TBRIK(nameChamber,"Mother","void",340,340,5.);
560 sprintf(nameNode,"MUON%d",100+fId+1);
561 TNode* node = new TNode(nameNode,"Chambernode",nameChamber,0,0,fChamber->Z(),"");
563 node->SetLineColor(kBlack);
564 AliMUON *pMUON = (AliMUON *) gAlice->GetModule("MUON");
565 (pMUON->Nodes())->Add(node);
569 for (j=0; j<fNSlats; j++)
571 sprintf(nameSlat,"SLAT%d",100*fId+1+j);
572 Float_t dx = 20.*npcb[j];
574 new TBRIK(nameSlat,"Slat Module","void",dx,20.,0.25);
576 color = TMath::Even(j) ? kColorMUON1 : kColorMUON2;
578 sprintf(nameNode,"SLAT%d",100*fId+1+j);
580 new TNode(nameNode,"Slat Module",nameSlat, dx+fXPosition[j],fYPosition[j]+dy,0,"");
581 nodeSlat->SetLineColor(color);
583 sprintf(nameNode,"SLAT%d",100*fId+1+j+fNSlats);
585 new TNode(nameNode,"Slat Module",nameSlat,-dx-fXPosition[j],fYPosition[j]+dy,0,"");
586 nodeSlat->SetLineColor(color);