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
64 //-----------------------------------------------------------
65 void AliMUONSegmentationSlat::SetPadSize(Float_t p1, Float_t p2)
67 // Sets the pad (strip) size
72 //-----------------------------------------------------------
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;
79 //-----------------------------------------------------------
80 void AliMUONSegmentationSlat::GetNParallelAndOffset(Int_t /*iX*/, Int_t /*iY*/, Int_t *Nparallel, Int_t *Offset)
85 //-----------------------------------------------------------
86 void AliMUONSegmentationSlat::GiveTestPoints(Int_t & /*n*/, Float_t */*x*/, Float_t */*y*/) const
88 //-----------------------------------------------------------
89 Float_t AliMUONSegmentationSlat::Distance2AndOffset(Int_t /*iX*/, Int_t /*iY*/, Float_t /*X*/, Float_t /*Y*/, Int_t * /*dummy*/)
93 //-----------------------------------------------------------
94 Float_t AliMUONSegmentationSlat::Dpx(Int_t isec) const
97 // Returns x-pad size for given sector isec
98 // isec = 100*islat+iregion
100 Int_t islat, iregion;
103 return Slat(islat)->Dpx(iregion);
106 Float_t AliMUONSegmentationSlat::Dpy(Int_t /*isec*/) const
109 // Returns y-pad (strip) size for given sector isec
113 void AliMUONSegmentationSlat::SetPadDivision(Int_t ndiv[4])
116 // Defines the pad size perp. to the anode wire (y) for different sectors.
117 // Pad sizes are defined as integral fractions ndiv of a basis pad size
120 for (Int_t i=0; i<4; i++) {
125 void AliMUONSegmentationSlat::GlobalToLocal(
126 Float_t x, Float_t y, Float_t z, Int_t &islat, Float_t &xlocal, Float_t &ylocal)
129 // Perform local to global transformation for space coordinates
136 // Transform According to slat plane z-position: negative side is shifted down
137 // positive side is shifted up
138 // by half the overlap
139 zlocal = z-fChamber->Z();
140 zlocal = (x>0) ? zlocal-2.*fDz : zlocal+2.*fDz;
141 // Set the signs for the symmetry transformation and transform to first quadrant
143 Float_t xabs=TMath::Abs(x);
145 Int_t ifirst = (zlocal < Float_t(0))? 0:1;
148 for (i=ifirst; i<fNSlats; i+=2) {
150 if ((y >= fYPosition[i]-eps) && (y <= fYPosition[i]+fSlatY+eps)) break;
154 // Transform to local coordinate system
157 if (index >= fNSlats || index < 0 ) {
158 islat = -1; xlocal=-1; ylocal = -1; }
160 ylocal = y -fYPosition[index];
161 xlocal = xabs-fXPosition[index];
166 void AliMUONSegmentationSlat::GlobalToLocal(
167 Int_t ix, Int_t iy, Int_t &islat, Int_t &ixlocal, Int_t &iylocal)
170 // Perform global to local transformation for pad coordinates
178 // Find slat number (index) and iylocal
179 for (Int_t i=0; i<fNSlats; i++) {
180 iytemp-=Slat(i)->Npy();
183 if (iytemp <= 0) break;
188 ixlocal=TMath::Abs(ix);
192 void AliMUONSegmentationSlat::
193 LocalToGlobal(Int_t islat, Float_t xlocal, Float_t ylocal, Float_t &x, Float_t &y, Float_t &z)
195 // Transform from local to global space coordinates
197 // upper plane (y>0) even slat number is shifted down
198 // upper plane (y>0) odd slat number is shifted up
199 // lower plane (y<0) even slat number is shifted up
200 // lower plane (y<0) odd slat number is shifted down
203 x = (xlocal+fXPosition[islat])*fSym;
204 y=(ylocal+fYPosition[islat]);
206 z = (TMath::Even(islat)) ? -fDz : fDz ;
207 z = (x>0) ? z+2.*fDz : z-2.*fDz ;
213 void AliMUONSegmentationSlat::LocalToGlobal(
214 Int_t islat, Int_t ixlocal, Int_t iylocal, Int_t &ix, Int_t &iy)
216 // Transform from local to global pad coordinates
222 // Find slat number (index) and iylocal
223 for (i=0; i<islat; i++) iy+=Slat(islat)->Npy();
230 void AliMUONSegmentationSlat::SetSymmetry(Int_t ix)
232 // Set set signs for symmetry transformation
233 fSym=TMath::Sign(1,ix);
236 void AliMUONSegmentationSlat::SetSymmetry(Float_t x)
238 // Set set signs for symmetry transformation
239 fSym=Int_t (TMath::Sign((Float_t)1.,x));
242 void AliMUONSegmentationSlat::
243 GetPadI(Float_t x, Float_t y, Float_t z, Int_t &ix, Int_t &iy)
245 // Returns pad coordinates for given set of space coordinates
248 Float_t xlocal, ylocal;
250 GlobalToLocal(x,y,z,islat,xlocal,ylocal);
255 Slat(islat)->GetPadI(xlocal, ylocal, ix, iy);
256 for (i=0; i<islat; i++) iy+=Slat(islat)->Npy();
258 ix=ix*Int_t(TMath::Sign((Float_t)1.,x));
262 void AliMUONSegmentationSlat::
263 GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y, Float_t &z)
265 // Returns real coordinates (x,y) for given pad coordinates (ix,iy)
267 Int_t islat, ixlocal, iylocal;
269 // Delegation of transforamtion to slat
270 GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
271 Slat(islat)->GetPadC(ixlocal, iylocal, x, y);
273 x+=fXPosition[islat];
274 y+=fYPosition[islat];
276 // Symmetry transformation of half planes
277 x=x*TMath::Sign(1,ix);
280 z = (TMath::Even(islat)) ? -fDz : fDz ;
281 z = (x>0) ? z+2.*fDz : z-2.*fDz ;
285 Int_t AliMUONSegmentationSlat::ISector()
287 // Returns current sector during tracking
290 iregion = fCurrentSlat->ISector();
291 return 100*fSlatIndex+iregion;
294 Int_t AliMUONSegmentationSlat::Sector(Int_t ix, Int_t iy)
296 // Returns sector for pad coordiantes (ix,iy)
297 Int_t ixlocal, iylocal, iregion, islat;
299 GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
301 iregion = Slat(islat)->Sector(ixlocal, iylocal);
302 return 100*islat+iregion;
306 void AliMUONSegmentationSlat::SetPad(Int_t ix, Int_t iy)
309 // Sets virtual pad coordinates, needed for evaluating pad response
310 // outside the tracking program
311 Int_t islat, ixlocal, iylocal;
315 GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
317 fCurrentSlat=Slat(islat);
318 fCurrentSlat->SetPad(ixlocal, iylocal);
321 void AliMUONSegmentationSlat::SetHit(Float_t xhit, Float_t yhit, Float_t zhit)
323 // Sets current hit coordinates
325 Float_t xlocal, ylocal;
330 GlobalToLocal(xhit,yhit,zhit,islat,xlocal,ylocal);
332 if (islat < 0) printf("\n SetHit: %d", islat);
334 fCurrentSlat=Slat(islat);
335 fCurrentSlat->SetHit(xlocal, ylocal);
339 void AliMUONSegmentationSlat::
340 FirstPad(Float_t xhit, Float_t yhit, Float_t zhit, Float_t dx, Float_t dy)
342 // Initialises iteration over pads for charge distribution algorithm
347 Float_t xlocal, ylocal;
348 GlobalToLocal(xhit, yhit, zhit, islat, xlocal, ylocal);
351 fCurrentSlat=Slat(islat);
352 fCurrentSlat->FirstPad(xlocal, ylocal, dx, dy);
358 void AliMUONSegmentationSlat::NextPad()
360 // Stepper for the iteration over pads
362 fCurrentSlat->NextPad();
366 Int_t AliMUONSegmentationSlat::MorePads()
367 // Stopping condition for the iterator over pads
369 // Are there more pads in the integration region
371 return fCurrentSlat->MorePads();
374 void AliMUONSegmentationSlat::
375 IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
377 // Returns integration limits for current pad
380 fCurrentSlat->IntegrationLimits(x1, x2, y1, y2);
384 void AliMUONSegmentationSlat::
385 Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10])
387 // Returns list of neighbours of pad with coordinates iX, iY
389 Int_t i, xListLocal[10], yListLocal[10], iXlocal, iYlocal, islat;
393 GlobalToLocal(iX, iY, islat, iXlocal, iYlocal);
395 Slat(islat)->Neighbours(iXlocal, iYlocal, Nlist, xListLocal, yListLocal);
397 for (i=0; i<*Nlist; i++) LocalToGlobal(islat, xListLocal[i], yListLocal[i], Xlist[i], Ylist[i]);
402 Int_t AliMUONSegmentationSlat::Ix()
404 // Return current pad coordinate ix during stepping
406 ixl=fCurrentSlat->Ix();
407 iyl=fCurrentSlat->Iy();
409 LocalToGlobal(fSlatIndex, ixl, iyl, ix, iy);
412 GlobalToLocal(ix, iy, isc, ixc, iyc);
413 Slat(isc)->GetPadC(ixc,iyc,xc,yc);
418 Int_t AliMUONSegmentationSlat::Iy()
420 // Return current pad coordinate iy during stepping
422 ixl=fCurrentSlat->Ix();
423 iyl=fCurrentSlat->Iy();
424 LocalToGlobal(fSlatIndex, ixl, iyl, ix, iy);
430 // Signal Generation Condition during Stepping
431 Int_t AliMUONSegmentationSlat::SigGenCond(Float_t x, Float_t y, Float_t z)
434 // True if signal generation condition fullfilled
435 Float_t xlocal, ylocal;
437 GlobalToLocal(x, y, z, islat, xlocal, ylocal);
438 return Slat(islat)->SigGenCond(xlocal, ylocal, z);
441 // Initialise signal generation at coord (x,y,z)
442 void AliMUONSegmentationSlat::SigGenInit(Float_t x, Float_t y, Float_t z)
444 // Initialize the signal generation condition
446 Float_t xlocal, ylocal;
449 GlobalToLocal(x, y, z, islat, xlocal, ylocal);
450 Slat(islat)->SigGenInit(xlocal, ylocal, z);
455 void AliMUONSegmentationSlat::Init(Int_t chamber)
458 // Initialize slat modules of quadrant +/+
459 // The other three quadrants are handled through symmetry transformations
461 //printf("\n Initialise Segmentation Slat \n");
464 // Initialize Slat modules
468 for (i=0; i<4; i++) ndiv[i]=(*fNDiv)[i];
473 for (i=0; i<15; i++) fSlatX[i]=0.;
475 // Initialize array of slats
476 fSlats = new TObjArray(fNSlats);
477 // Maximum number of strips (pads) in x and y
480 // for each slat in the quadrant (+,+)
481 for (islat=0; islat<fNSlats; islat++) {
482 fSlats->AddAt(CreateSlatModule(),islat);
484 AliMUONSegmentationSlatModule *slat = Slat(islat);
489 slat->SetPadSize(fDpx, fDpy);
490 // Forward wire pitch
491 slat->SetDAnod(fWireD);
492 // Foward segmentation
493 slat->SetPadDivision(ndiv);
494 slat->SetPcbBoards(fPcb[islat]);
495 // Initialize slat module
497 // y-position of slat module relative to the first (closest to the beam)
498 fYPosition[islat]= fYPosOrigin+islat*(fSlatY-2.*fShift);
501 if (slat->Npx() > fNpx) fNpx=slat->Npx();
503 for (isec=0; isec< 4; isec++)
505 fSlatX[islat]+=40.*fPcb[islat][isec];
509 // Set parent chamber number
510 AliMUON *pMUON = (AliMUON *) gAlice->GetModule("MUON");
511 fChamber=&(pMUON->Chamber(chamber));
519 void AliMUONSegmentationSlat::SetNPCBperSector(Int_t *npcb)
521 // PCB distribution for station 4 (6 rows with 1+3 segmentation regions)
522 for (Int_t islat=0; islat<fNSlats; islat++){
523 fPcb[islat][0] = *(npcb + 4 * islat);
524 fPcb[islat][1] = *(npcb + 4 * islat + 1);
525 fPcb[islat][2] = *(npcb + 4 * islat + 2);
526 fPcb[islat][3] = *(npcb + 4 * islat + 3);
531 void AliMUONSegmentationSlat::SetSlatXPositions(Float_t *xpos)
533 // Set x-positions of Slats
534 for (Int_t islat=0; islat<fNSlats; islat++) fXPosition[islat]=xpos[islat];
537 AliMUONSegmentationSlatModule* AliMUONSegmentationSlat::Slat(Int_t index) const
538 //PH { return ((AliMUONSegmentationSlatModule*) (*fSlats)[index]);}
539 { return ((AliMUONSegmentationSlatModule*) fSlats->At(index));}
542 AliMUONSegmentationSlatModule* AliMUONSegmentationSlat::
545 // Factory method for slat module
546 return new AliMUONSegmentationSlatModule(4);
550 void AliMUONSegmentationSlat::Draw(const char* opt) const
552 // Draw method for event display
554 if (!strcmp(opt,"eventdisplay")) {
555 const int kColorMUON1 = kYellow;
556 const int kColorMUON2 = kBlue;
558 // Drawing Routines for example for Event Display
561 char nameChamber[9], nameSlat[9], nameNode[9];
564 // Number of modules per slat
565 for (i=0; i<fNSlats; i++) {
567 for (j=0; j<4; j++) npcb[i]+=fPcb[i][j];
570 TNode* top=gAlice->GetGeometry()->GetNode("alice");
571 sprintf(nameChamber,"C_MUON%d",fId+1);
572 new TBRIK(nameChamber,"Mother","void",340,340,5.);
574 sprintf(nameNode,"MUON%d",100+fId+1);
575 TNode* node = new TNode(nameNode,"Chambernode",nameChamber,0,0,fChamber->Z(),"");
577 node->SetLineColor(kBlack);
578 AliMUON *pMUON = (AliMUON *) gAlice->GetModule("MUON");
579 (pMUON->Nodes())->Add(node);
583 for (j=0; j<fNSlats; j++)
585 sprintf(nameSlat,"SLAT%d",100*fId+1+j);
586 Float_t dx = 20.*npcb[j];
588 new TBRIK(nameSlat,"Slat Module","void",dx,20.,0.25);
590 color = TMath::Even(j) ? kColorMUON1 : kColorMUON2;
592 sprintf(nameNode,"SLAT%d",100*fId+1+j);
594 new TNode(nameNode,"Slat Module",nameSlat, dx+fXPosition[j],fYPosition[j]+dy,0,"");
595 nodeSlat->SetLineColor(color);
597 sprintf(nameNode,"SLAT%d",100*fId+1+j+fNSlats);
599 new TNode(nameNode,"Slat Module",nameSlat,-dx-fXPosition[j],fYPosition[j]+dy,0,"");
600 nodeSlat->SetLineColor(color);