[u/mrichter/AliRoot.git] / MUON / AliMUONSegmentationSlat.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/*
$Log$
Revision 1.3  2000/10/18 11:42:06  morsch
- AliMUONRawCluster contains z-position.
- Some clean-up of useless print statements during initialisations.

Revision 1.2  2000/10/09 14:06:18  morsch
Some type cast problems of type  (TMath::Sign((Float_t)1.,x)) corrected (P.H.)

Revision 1.1  2000/10/06 09:00:47  morsch
Segmentation class for chambers built out of slats.

*/

#include "AliMUONSegmentationSlat.h"
#include "AliMUONSegmentationSlatModule.h"
#include "AliMUON.h"
#include "AliMUONChamber.h"
#include "TArrayI.h"
#include "TObjArray.h"
#include "AliRun.h"
#include <TMath.h>
#include <iostream.h>

//___________________________________________
ClassImp(AliMUONSegmentationSlat)

AliMUONSegmentationSlat::AliMUONSegmentationSlat() 
{
// Default constructor
    fSlats=0;            
    fNDiv = new TArrayI(4);   
}

void AliMUONSegmentationSlat::SetPadSize(Float_t p1, Float_t p2)
{
//  Sets the pad (strip) size 
//  
    fDpx=p1;
    fDpy=p2;
}

Float_t AliMUONSegmentationSlat::GetAnod(Float_t xhit) const
{
// Returns for a hit position xhit the position of the nearest anode wire    
    Float_t wire= (xhit>0)? Int_t(xhit/fWireD)+0.5:Int_t(xhit/fWireD)-0.5;
    return fWireD*wire;
}

Float_t AliMUONSegmentationSlat::Dpx(Int_t isec) const
{
//
// Returns x-pad size for given sector isec
// isec = 100*islat+iregion
//
    Int_t islat, iregion;
    islat    = isec/100;
    iregion  = isec%100;
    return Slat(islat)->Dpx(iregion);
}

Float_t AliMUONSegmentationSlat::Dpy(Int_t isec) const
{
//
// Returns y-pad (strip)  size for given sector isec
   return fDpy;
}

void AliMUONSegmentationSlat::SetPadDivision(Int_t ndiv[4])
{
//
// Defines the pad size perp. to the anode wire (y) for different sectors. 
// Pad sizes are defined as integral fractions ndiv of a basis pad size
// fDpx
// 
    for (Int_t i=0; i<4; i++) {
	(*fNDiv)[i]=ndiv[i];
    }
}

void AliMUONSegmentationSlat::GlobalToLocal(
    Float_t x, Float_t y, Float_t z, Int_t &islat, Float_t &xlocal, Float_t &ylocal)
{
//
// Perform local to global transformation for space coordinates
//
    Float_t zlocal;
    Int_t i;
    Int_t index=-1;
// Transform According to slat plane z-position: negative side is shifted down 
//                                                 positive side is shifted up
// by half the overlap
    zlocal = z-fChamber->Z();
//  Set the signs for the symmetry transformation and transform to first quadrant
    SetSymmetry(x);
    Float_t xabs=TMath::Abs(x);

    Int_t ifirst = (zlocal < Float_t(0))? 0:1;
//
// Find slat number                      
    for (i=ifirst; i<fNSlats; i+=2) {
	index=i;
	if ((y >= fYPosition[i]) && (y < fYPosition[i]+fSlatY)) break;
    }
    
//
// Transform to local coordinate system

    
    ylocal = y   -fYPosition[index];
    xlocal = xabs-fXPosition[index];
    islat  = index;
    if (i >= fNSlats) {islat = -1; x=-1; y = -1;}
}

void AliMUONSegmentationSlat::GlobalToLocal(
    Int_t ix, Int_t iy, Int_t &islat, Int_t &ixlocal, Int_t &iylocal)
{
//
// Perform global to local transformation for pad coordinates
//
    Int_t iytemp = iy;
    Int_t index  =  0;
    
    iylocal = iytemp;

//
// Find slat number (index) and iylocal  
    for (Int_t i=0; i<fNSlats; i++) {
	iytemp-=Slat(i)->Npy();
	
	
	if (iytemp <= 0) break;
	iylocal = iytemp;
	index=i+1;
    }

    ixlocal=TMath::Abs(ix);
    islat=index;
}

void AliMUONSegmentationSlat::
LocalToGlobal(Int_t islat, Float_t  xlocal, Float_t  ylocal, Float_t  &x, Float_t  &y, Float_t &z)
{
// Transform from local to global space coordinates
//
// upper plane (y>0) even slat number is shifted down
// upper plane (y>0)  odd slat number is shifted up 
// lower plane (y<0) even slat number is shifted up
// lower plane (y<0)  odd slat number is shifted down
//

    x = (xlocal+fXPosition[islat])*fSym;
    y=(ylocal+fYPosition[islat]);

    z = (TMath::Even(islat)) ? -fDz : fDz ; 
    z+=fChamber->Z();
}


void AliMUONSegmentationSlat::LocalToGlobal(
    Int_t islat, Int_t ixlocal, Int_t iylocal, Int_t &ix, Int_t &iy)
{
// Transform from local to global pad coordinates
//
    Int_t i;
    iy=iylocal;
    
//
// Find slat number (index) and iylocal  
    for (i=0; i<islat; i++) iy+=Slat(islat)->Npy();

    ix=ixlocal*fSym;
    iy=iy;
}


void AliMUONSegmentationSlat::SetSymmetry(Int_t   ix)
{
// Set set signs for symmetry transformation
    fSym=TMath::Sign(1,ix);
}

void AliMUONSegmentationSlat::SetSymmetry(Float_t  x)
{
// Set set signs for symmetry transformation
    fSym=Int_t (TMath::Sign((Float_t)1.,x));
}

void AliMUONSegmentationSlat::
GetPadI(Float_t x, Float_t y, Float_t z, Int_t &ix, Int_t &iy)
{
// Returns pad coordinates for given set of space coordinates

    Int_t islat, i;
    Float_t xlocal, ylocal;
    
    GlobalToLocal(x,y,z,islat,xlocal,ylocal);
    if (islat == -1) {
	ix=0; iy=0; return;
    }
    
    Slat(islat)->GetPadI(xlocal, ylocal, ix, iy);
    for (i=0; i<islat; i++) iy+=Slat(islat)->Npy();

    ix=ix*Int_t(TMath::Sign((Float_t)1.,x));    
}


void AliMUONSegmentationSlat::
GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y, Float_t &z)
{
//  Returns real coordinates (x,y) for given pad coordinates (ix,iy)
//
    Int_t islat, ixlocal, iylocal;
//
// Delegation of transforamtion to slat
    GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
    Slat(islat)->GetPadC(ixlocal, iylocal, x, y);
// Slat offset
    x+=fXPosition[islat];
    y+=fYPosition[islat];    

// Symmetry transformation of half planes
    x=x*TMath::Sign(1,ix);

// z-position
    z = (TMath::Even(islat)) ? -fDz : fDz ; 
    z += fChamber->Z();
}

Int_t AliMUONSegmentationSlat::ISector()
{
// Returns current sector during tracking
    Int_t iregion;
    
    iregion =  fCurrentSlat->ISector();
    return 100*fSlatIndex+iregion;
}

Int_t AliMUONSegmentationSlat::Sector(Int_t ix, Int_t iy)
{
    Int_t ixlocal, iylocal, iregion, islat;

    GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
    
    iregion =  Slat(islat)->Sector(ixlocal, iylocal);
    return 100*islat+iregion;
}


void AliMUONSegmentationSlat::SetPad(Int_t ix, Int_t iy)
{
    //
    // Sets virtual pad coordinates, needed for evaluating pad response 
    // outside the tracking program
    Int_t islat, ixlocal, iylocal;

    SetSymmetry(ix);
    
    GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
    fSlatIndex=islat;
    fCurrentSlat=Slat(islat);
    fCurrentSlat->SetPad(ixlocal, iylocal);
}

void  AliMUONSegmentationSlat::SetHit(Float_t xhit, Float_t yhit, Float_t zhit)
{   //
    // Sets current hit coordinates

    Float_t xlocal, ylocal;
    Int_t islat;

    
    GlobalToLocal(xhit,yhit,zhit,islat,xlocal,ylocal);
    fSlatIndex=islat;
    if (islat < 0) printf("\n SetHit: %d", islat);
    
    fCurrentSlat=Slat(islat);
    fCurrentSlat->SetHit(xlocal, ylocal);
}


void AliMUONSegmentationSlat::
FirstPad(Float_t xhit, Float_t yhit, Float_t zhit, Float_t dx, Float_t dy)
{
// Initialises iteration over pads for charge distribution algorithm
//


    Int_t islat;
    Float_t xlocal, ylocal;
    GlobalToLocal(xhit, yhit, zhit, islat, xlocal, ylocal);
    fSlatIndex=islat;
    fCurrentSlat=Slat(islat);
    fCurrentSlat->FirstPad(xlocal, ylocal, dx, dy);

}


void AliMUONSegmentationSlat::NextPad()
{
// Stepper for the iteration over pads
//
    fCurrentSlat->NextPad();
}


Int_t AliMUONSegmentationSlat::MorePads()
// Stopping condition for the iterator over pads
//
// Are there more pads in the integration region
{ 
    return fCurrentSlat->MorePads();
}

void AliMUONSegmentationSlat::
IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
{
//  Returns integration limits for current pad
//
    
    fCurrentSlat->IntegrationLimits(x1, x2, y1, y2);

}

void AliMUONSegmentationSlat::
Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10])
{
// Returns list of neighbours of pad with coordinates iX, iY

    Int_t i, xListLocal[10], yListLocal[10], iXlocal, iYlocal, islat;
    
    SetSymmetry(iX);

    GlobalToLocal(iX, iY, islat, iXlocal, iYlocal);
 
    Slat(islat)->Neighbours(iXlocal, iYlocal, Nlist, xListLocal, yListLocal);
    
    for (i=0; i<*Nlist; i++) LocalToGlobal(islat, xListLocal[i], yListLocal[i], Xlist[i], Ylist[i]);

}


Int_t  AliMUONSegmentationSlat::Ix()
{
// Return current pad coordinate ix during stepping
    Int_t ixl,iyl,ix,iy;
    ixl=fCurrentSlat->Ix();
    iyl=fCurrentSlat->Iy();
    
    LocalToGlobal(fSlatIndex, ixl, iyl, ix, iy);
    Int_t ixc, iyc, isc;
    Float_t xc, yc;
    GlobalToLocal(ix, iy, isc, ixc, iyc);
    Slat(isc)->GetPadC(ixc,iyc,xc,yc);
    return ix;
}


Int_t  AliMUONSegmentationSlat::Iy()
{
// Return current pad coordinate iy during stepping
    Int_t ixl,iyl,ix,iy;
    ixl=fCurrentSlat->Ix();
    iyl=fCurrentSlat->Iy();
    LocalToGlobal(fSlatIndex, ixl, iyl, ix, iy);
    return iy;
}


   // Signal Generation Condition during Stepping
Int_t AliMUONSegmentationSlat::SigGenCond(Float_t x, Float_t y, Float_t z)
{ 
//
//  True if signal generation condition fullfilled
    Float_t xlocal, ylocal;
    Int_t islat;
    GlobalToLocal(x, y, z, islat, xlocal, ylocal);
    return Slat(islat)->SigGenCond(xlocal, ylocal, z);
}

// Initialise signal generation at coord (x,y,z)
void  AliMUONSegmentationSlat::SigGenInit(Float_t x, Float_t y, Float_t z)
{
// Initialize the signal generation condition
//
    Float_t xlocal, ylocal;
    Int_t islat;

    GlobalToLocal(x, y, z, islat, xlocal, ylocal);
    Slat(islat)->SigGenInit(xlocal, ylocal, z);
}


void AliMUONSegmentationSlat::Init(Int_t chamber)
{
//    
// Initialize slat modules of quadrant +/+    
// The other three quadrants are handled through symmetry transformations
//
    printf("\n Initialise Segmentation Slat \n");
//

//    Initialize Slat modules
    Int_t islat, i;
    Int_t ndiv[4];
// Pad division
    for (i=0; i<4; i++) ndiv[i]=(*fNDiv)[i];
// Half distance between slat planes
    fDz=1.76;
// Slat height    
    fSlatY=40.;
    for (i=0; i<15; i++) fSlatX[i]=0.;
    
// Initialize array of slats 
    fSlats  = new TObjArray(fNSlats);
// Maximum number of strips (pads) in x and y
    fNpy=0;   
    fNpx=0;
// for each slat in the quadrant (+,+)    
    for (islat=0; islat<fNSlats; islat++) {
	(*fSlats)[islat] = CreateSlatModule();

	AliMUONSegmentationSlatModule *slat =  Slat(islat);
	// Configure Slat
	slat->SetId(islat);
	
// Foward pad size
	slat->SetPadSize(fDpx, fDpy);
// Forward wire pitch
	slat->SetDAnod(fWireD);
// Foward segmentation 
	slat->SetPadDivision(ndiv);
	slat->SetPcbBoards(fPcb[islat]);
// Initialize slat module
	slat->Init(chamber);
// y-position of slat module relative to the first (closest to the beam)
	fYPosition[islat]= fYPosOrigin+islat*(fSlatY-2.*fShift);
//
	fNpy+=slat->Npy();
	if (slat->Npx() > fNpx) fNpx=slat->Npx();
	Int_t isec;
	for (isec=0; isec< 4; isec++)
	{
	    fSlatX[islat]+=40.*fPcb[islat][isec];
	}
	
    }
// Set parent chamber number
    AliMUON *pMUON  = (AliMUON *) gAlice->GetModule("MUON");
    fChamber=&(pMUON->Chamber(chamber));
}


void AliMUONSegmentationSlat::SetNPCBperSector(Int_t *npcb)
{ 
    //  PCB distribution for station 4 (6 rows with 1+3 segmentation regions)
    for (Int_t islat=0; islat<fNSlats; islat++){ 
	fPcb[islat][0] = *(npcb + 4 * islat);
	fPcb[islat][1] = *(npcb + 4 * islat + 1);
	fPcb[islat][2] = *(npcb + 4 * islat + 2);
	fPcb[islat][3] = *(npcb + 4 * islat + 3);
    }
}


void  AliMUONSegmentationSlat::SetSlatXPositions(Float_t *xpos)
{
// Set x-positions of Slats
    for (Int_t islat=0; islat<fNSlats; islat++) fXPosition[islat]=xpos[islat];
}

AliMUONSegmentationSlatModule*  AliMUONSegmentationSlat::Slat(Int_t index) const
{ return ((AliMUONSegmentationSlatModule*) (*fSlats)[index]);}


AliMUONSegmentationSlatModule* AliMUONSegmentationSlat::
CreateSlatModule()
{
    // Factory method for slat module
    return new AliMUONSegmentationSlatModule();
}
Commit	Line	Data
5de7d27f	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	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	**************************************************************************/
	15
	16	/*
	17	$Log$
2b202c2e	18	Revision 1.3 2000/10/18 11:42:06 morsch
	19	- AliMUONRawCluster contains z-position.
	20	- Some clean-up of useless print statements during initialisations.
	21
3e1872ed	22	Revision 1.2 2000/10/09 14:06:18 morsch
	23	Some type cast problems of type (TMath::Sign((Float_t)1.,x)) corrected (P.H.)
	24
deba22dc	25	Revision 1.1 2000/10/06 09:00:47 morsch
	26	Segmentation class for chambers built out of slats.
	27
5de7d27f	28	*/
	29
	30	#include "AliMUONSegmentationSlat.h"
	31	#include "AliMUONSegmentationSlatModule.h"
	32	#include "AliMUON.h"
	33	#include "AliMUONChamber.h"
	34	#include "TArrayI.h"
	35	#include "TObjArray.h"
	36	#include "AliRun.h"
	37	#include <TMath.h>
	38	#include <iostream.h>
	39
	40	//___________________________________________
	41	ClassImp(AliMUONSegmentationSlat)
	42
	43	AliMUONSegmentationSlat::AliMUONSegmentationSlat()
	44	{
	45	// Default constructor
	46	fSlats=0;
	47	fNDiv = new TArrayI(4);
	48	}
	49
	50	void AliMUONSegmentationSlat::SetPadSize(Float_t p1, Float_t p2)
	51	{
	52	// Sets the pad (strip) size
	53	//
	54	fDpx=p1;
	55	fDpy=p2;
	56	}
	57
	58	Float_t AliMUONSegmentationSlat::GetAnod(Float_t xhit) const
	59	{
	60	// Returns for a hit position xhit the position of the nearest anode wire
	61	Float_t wire= (xhit>0)? Int_t(xhit/fWireD)+0.5:Int_t(xhit/fWireD)-0.5;
	62	return fWireD*wire;
	63	}
	64
	65	Float_t AliMUONSegmentationSlat::Dpx(Int_t isec) const
	66	{
	67	//
	68	// Returns x-pad size for given sector isec
	69	// isec = 100*islat+iregion
	70	//
	71	Int_t islat, iregion;
	72	islat = isec/100;
	73	iregion = isec%100;
	74	return Slat(islat)->Dpx(iregion);
	75	}
	76
	77	Float_t AliMUONSegmentationSlat::Dpy(Int_t isec) const
	78	{
	79	//
	80	// Returns y-pad (strip) size for given sector isec
	81	return fDpy;
	82	}
	83
	84	void AliMUONSegmentationSlat::SetPadDivision(Int_t ndiv[4])
	85	{
	86	//
	87	// Defines the pad size perp. to the anode wire (y) for different sectors.
	88	// Pad sizes are defined as integral fractions ndiv of a basis pad size
	89	// fDpx
	90	//
	91	for (Int_t i=0; i<4; i++) {
92	(*fNDiv)[i]=ndiv[i];
93	}
94	}
95
96	void AliMUONSegmentationSlat::GlobalToLocal(
97	Float_t x, Float_t y, Float_t z, Int_t &islat, Float_t &xlocal, Float_t &ylocal)
98	{
99	//
100	// Perform local to global transformation for space coordinates
101	//
102	Float_t zlocal;
103	Int_t i;
104	Int_t index=-1;
105	// Transform According to slat plane z-position: negative side is shifted down
106	// positive side is shifted up
107	// by half the overlap
108	zlocal = z-fChamber->Z();
5de7d27f	109	// Set the signs for the symmetry transformation and transform to first quadrant
2b202c2e	110	SetSymmetry(x);
5de7d27f	111	Float_t xabs=TMath::Abs(x);
5de7d27f	112
2b202c2e	113	Int_t ifirst = (zlocal < Float_t(0))? 0:1;
5de7d27f	114	//
	115	// Find slat number
	116	for (i=ifirst; i<fNSlats; i+=2) {
	117	index=i;
2b202c2e	118	if ((y >= fYPosition[i]) && (y < fYPosition[i]+fSlatY)) break;
5de7d27f	119	}
	120
	121	//
	122	// Transform to local coordinate system
	123
	124
2b202c2e	125	ylocal = y -fYPosition[index];
5de7d27f	126	xlocal = xabs-fXPosition[index];
	127	islat = index;
	128	if (i >= fNSlats) {islat = -1; x=-1; y = -1;}
	129	}
	130
	131	void AliMUONSegmentationSlat::GlobalToLocal(
	132	Int_t ix, Int_t iy, Int_t &islat, Int_t &ixlocal, Int_t &iylocal)
	133	{
	134	//
	135	// Perform global to local transformation for pad coordinates
	136	//
2b202c2e	137	Int_t iytemp = iy;
2b202c2e	138	Int_t index = 0;
5de7d27f	139
	140	iylocal = iytemp;
	141
	142	//
	143	// Find slat number (index) and iylocal
	144	for (Int_t i=0; i<fNSlats; i++) {
	145	iytemp-=Slat(i)->Npy();
	146
	147
	148	if (iytemp <= 0) break;
	149	iylocal = iytemp;
	150	index=i+1;
	151	}
	152
	153	ixlocal=TMath::Abs(ix);
	154	islat=index;
5de7d27f	155	}
	156
	157	void AliMUONSegmentationSlat::
	158	LocalToGlobal(Int_t islat, Float_t xlocal, Float_t ylocal, Float_t &x, Float_t &y, Float_t &z)
	159	{
	160	// Transform from local to global space coordinates
	161	//
	162	// upper plane (y>0) even slat number is shifted down
	163	// upper plane (y>0) odd slat number is shifted up
	164	// lower plane (y<0) even slat number is shifted up
	165	// lower plane (y<0) odd slat number is shifted down
	166	//
	167
2b202c2e	168	x = (xlocal+fXPosition[islat])*fSym;
2b202c2e	169	y=(ylocal+fYPosition[islat]);
5de7d27f	170
2b202c2e	171	z = (TMath::Even(islat)) ? -fDz : fDz ;
5de7d27f	172	z+=fChamber->Z();
5de7d27f	173	}
	174
	175
	176	void AliMUONSegmentationSlat::LocalToGlobal(
	177	Int_t islat, Int_t ixlocal, Int_t iylocal, Int_t &ix, Int_t &iy)
	178	{
	179	// Transform from local to global pad coordinates
	180	//
	181	Int_t i;
	182	iy=iylocal;
	183
	184	//
	185	// Find slat number (index) and iylocal
	186	for (i=0; i<islat; i++) iy+=Slat(islat)->Npy();
	187
2b202c2e	188	ix=ixlocal*fSym;
2b202c2e	189	iy=iy;
5de7d27f	190	}
	191
	192
2b202c2e	193	void AliMUONSegmentationSlat::SetSymmetry(Int_t ix)
5de7d27f	194	{
5de7d27f	195	// Set set signs for symmetry transformation
2b202c2e	196	fSym=TMath::Sign(1,ix);
5de7d27f	197	}
5de7d27f	198
2b202c2e	199	void AliMUONSegmentationSlat::SetSymmetry(Float_t x)
5de7d27f	200	{
5de7d27f	201	// Set set signs for symmetry transformation
2b202c2e	202	fSym=Int_t (TMath::Sign((Float_t)1.,x));
5de7d27f	203	}
	204
	205	void AliMUONSegmentationSlat::
	206	GetPadI(Float_t x, Float_t y, Float_t z, Int_t &ix, Int_t &iy)
	207	{
	208	// Returns pad coordinates for given set of space coordinates
	209
	210	Int_t islat, i;
	211	Float_t xlocal, ylocal;
	212
	213	GlobalToLocal(x,y,z,islat,xlocal,ylocal);
	214	if (islat == -1) {
	215	ix=0; iy=0; return;
	216	}
	217
	218	Slat(islat)->GetPadI(xlocal, ylocal, ix, iy);
	219	for (i=0; i<islat; i++) iy+=Slat(islat)->Npy();
	220
deba22dc	221	ix=ix*Int_t(TMath::Sign((Float_t)1.,x));
5de7d27f	222	}
5de7d27f	223
2b202c2e	224
5de7d27f	225	void AliMUONSegmentationSlat::
	226	GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y, Float_t &z)
	227	{
	228	// Returns real coordinates (x,y) for given pad coordinates (ix,iy)
	229	//
	230	Int_t islat, ixlocal, iylocal;
	231	//
	232	// Delegation of transforamtion to slat
	233	GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
	234	Slat(islat)->GetPadC(ixlocal, iylocal, x, y);
	235	// Slat offset
	236	x+=fXPosition[islat];
	237	y+=fYPosition[islat];
	238
2b202c2e	239	// Symmetry transformation of half planes
5de7d27f	240	x=x*TMath::Sign(1,ix);
2b202c2e	241
	242	// z-position
	243	z = (TMath::Even(islat)) ? -fDz : fDz ;
	244	z += fChamber->Z();
5de7d27f	245	}
	246
	247	Int_t AliMUONSegmentationSlat::ISector()
	248	{
	249	// Returns current sector during tracking
	250	Int_t iregion;
	251
	252	iregion = fCurrentSlat->ISector();
	253	return 100*fSlatIndex+iregion;
	254	}
	255
	256	Int_t AliMUONSegmentationSlat::Sector(Int_t ix, Int_t iy)
	257	{
	258	Int_t ixlocal, iylocal, iregion, islat;
	259
	260	GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
	261
	262	iregion = Slat(islat)->Sector(ixlocal, iylocal);
	263	return 100*islat+iregion;
	264	}
	265
	266
	267	void AliMUONSegmentationSlat::SetPad(Int_t ix, Int_t iy)
	268	{
	269	//
	270	// Sets virtual pad coordinates, needed for evaluating pad response
	271	// outside the tracking program
	272	Int_t islat, ixlocal, iylocal;
	273
2b202c2e	274	SetSymmetry(ix);
5de7d27f	275
	276	GlobalToLocal(ix,iy,islat,ixlocal,iylocal);
	277	fSlatIndex=islat;
	278	fCurrentSlat=Slat(islat);
	279	fCurrentSlat->SetPad(ixlocal, iylocal);
	280	}
	281
	282	void AliMUONSegmentationSlat::SetHit(Float_t xhit, Float_t yhit, Float_t zhit)
	283	{ //
	284	// Sets current hit coordinates
	285
	286	Float_t xlocal, ylocal;
	287	Int_t islat;
	288
	289
	290
	291	GlobalToLocal(xhit,yhit,zhit,islat,xlocal,ylocal);
	292	fSlatIndex=islat;
	293	if (islat < 0) printf("\n SetHit: %d", islat);
	294
	295	fCurrentSlat=Slat(islat);
	296	fCurrentSlat->SetHit(xlocal, ylocal);
	297	}
	298
	299
	300	void AliMUONSegmentationSlat::
	301	FirstPad(Float_t xhit, Float_t yhit, Float_t zhit, Float_t dx, Float_t dy)
	302	{
	303	// Initialises iteration over pads for charge distribution algorithm
	304	//
	305
	306
	307
	308	Int_t islat;
	309	Float_t xlocal, ylocal;
	310	GlobalToLocal(xhit, yhit, zhit, islat, xlocal, ylocal);
	311	fSlatIndex=islat;
	312	fCurrentSlat=Slat(islat);
	313	fCurrentSlat->FirstPad(xlocal, ylocal, dx, dy);
	314
	315	}
	316
	317
	318	void AliMUONSegmentationSlat::NextPad()
	319	{
	320	// Stepper for the iteration over pads
	321	//
	322	fCurrentSlat->NextPad();
	323	}
	324
	325
	326	Int_t AliMUONSegmentationSlat::MorePads()
	327	// Stopping condition for the iterator over pads
	328	//
	329	// Are there more pads in the integration region
	330	{
	331	return fCurrentSlat->MorePads();
	332	}
	333
	334	void AliMUONSegmentationSlat::
	335	IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
	336	{
	337	// Returns integration limits for current pad
	338	//
339
340	fCurrentSlat->IntegrationLimits(x1, x2, y1, y2);
341
342	}
343
344	void AliMUONSegmentationSlat::
345	Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10])
346	{
347	// Returns list of neighbours of pad with coordinates iX, iY
348
349	Int_t i, xListLocal[10], yListLocal[10], iXlocal, iYlocal, islat;
350
2b202c2e	351	SetSymmetry(iX);
5de7d27f	352
	353	GlobalToLocal(iX, iY, islat, iXlocal, iYlocal);
	354
	355	Slat(islat)->Neighbours(iXlocal, iYlocal, Nlist, xListLocal, yListLocal);
	356
	357	for (i=0; i<*Nlist; i++) LocalToGlobal(islat, xListLocal[i], yListLocal[i], Xlist[i], Ylist[i]);
	358
	359	}
	360
	361
	362	Int_t AliMUONSegmentationSlat::Ix()
	363	{
	364	// Return current pad coordinate ix during stepping
	365	Int_t ixl,iyl,ix,iy;
	366	ixl=fCurrentSlat->Ix();
	367	iyl=fCurrentSlat->Iy();
	368
	369	LocalToGlobal(fSlatIndex, ixl, iyl, ix, iy);
	370	Int_t ixc, iyc, isc;
	371	Float_t xc, yc;
	372	GlobalToLocal(ix, iy, isc, ixc, iyc);
	373	Slat(isc)->GetPadC(ixc,iyc,xc,yc);
	374	return ix;
	375	}
	376
	377
	378	Int_t AliMUONSegmentationSlat::Iy()
	379	{
	380	// Return current pad coordinate iy during stepping
	381	Int_t ixl,iyl,ix,iy;
	382	ixl=fCurrentSlat->Ix();
	383	iyl=fCurrentSlat->Iy();
	384	LocalToGlobal(fSlatIndex, ixl, iyl, ix, iy);
	385	return iy;
	386	}
	387
	388
	389
	390	// Signal Generation Condition during Stepping
	391	Int_t AliMUONSegmentationSlat::SigGenCond(Float_t x, Float_t y, Float_t z)
	392	{
	393	//
	394	// True if signal generation condition fullfilled
	395	Float_t xlocal, ylocal;
	396	Int_t islat;
	397	GlobalToLocal(x, y, z, islat, xlocal, ylocal);
	398	return Slat(islat)->SigGenCond(xlocal, ylocal, z);
	399	}
	400
	401	// Initialise signal generation at coord (x,y,z)
	402	void AliMUONSegmentationSlat::SigGenInit(Float_t x, Float_t y, Float_t z)
	403	{
	404	// Initialize the signal generation condition
	405	//
	406	Float_t xlocal, ylocal;
	407	Int_t islat;
	408
	409	GlobalToLocal(x, y, z, islat, xlocal, ylocal);
	410	Slat(islat)->SigGenInit(xlocal, ylocal, z);
	411	}
	412
	413
	414
	415	void AliMUONSegmentationSlat::Init(Int_t chamber)
416	{
417	//
418	// Initialize slat modules of quadrant +/+
419	// The other three quadrants are handled through symmetry transformations
420	//
3e1872ed	421	printf("\n Initialise Segmentation Slat \n");
5de7d27f	422	//
	423
	424	// Initialize Slat modules
	425	Int_t islat, i;
	426	Int_t ndiv[4];
	427	// Pad division
	428	for (i=0; i<4; i++) ndiv[i]=(*fNDiv)[i];
	429	// Half distance between slat planes
	430	fDz=1.76;
	431	// Slat height
	432	fSlatY=40.;
2b202c2e	433	for (i=0; i<15; i++) fSlatX[i]=0.;
5de7d27f	434
	435	// Initialize array of slats
	436	fSlats = new TObjArray(fNSlats);
	437	// Maximum number of strips (pads) in x and y
	438	fNpy=0;
	439	fNpx=0;
	440	// for each slat in the quadrant (+,+)
	441	for (islat=0; islat<fNSlats; islat++) {
	442	(*fSlats)[islat] = CreateSlatModule();
	443
	444	AliMUONSegmentationSlatModule *slat = Slat(islat);
	445	// Configure Slat
	446	slat->SetId(islat);
	447
	448	// Foward pad size
	449	slat->SetPadSize(fDpx, fDpy);
	450	// Forward wire pitch
	451	slat->SetDAnod(fWireD);
	452	// Foward segmentation
	453	slat->SetPadDivision(ndiv);
	454	slat->SetPcbBoards(fPcb[islat]);
	455	// Initialize slat module
	456	slat->Init(chamber);
	457	// y-position of slat module relative to the first (closest to the beam)
2b202c2e	458	fYPosition[islat]= fYPosOrigin+islat(fSlatY-2.fShift);
5de7d27f	459	//
	460	fNpy+=slat->Npy();
	461	if (slat->Npx() > fNpx) fNpx=slat->Npx();
	462	Int_t isec;
	463	for (isec=0; isec< 4; isec++)
	464	{
	465	fSlatX[islat]+=40.*fPcb[islat][isec];
	466	}
	467
	468	}
	469	// Set parent chamber number
	470	AliMUON pMUON = (AliMUON ) gAlice->GetModule("MUON");
	471	fChamber=&(pMUON->Chamber(chamber));
	472	}
	473
	474
	475
	476
	477
	478	void AliMUONSegmentationSlat::SetNPCBperSector(Int_t *npcb)
	479	{
	480	// PCB distribution for station 4 (6 rows with 1+3 segmentation regions)
	481	for (Int_t islat=0; islat<fNSlats; islat++){
	482	fPcb[islat][0] = (npcb + 4 islat);
	483	fPcb[islat][1] = (npcb + 4 islat + 1);
	484	fPcb[islat][2] = (npcb + 4 islat + 2);
	485	fPcb[islat][3] = (npcb + 4 islat + 3);
	486	}
	487	}
	488
	489
	490	void AliMUONSegmentationSlat::SetSlatXPositions(Float_t *xpos)
	491	{
	492	// Set x-positions of Slats
	493	for (Int_t islat=0; islat<fNSlats; islat++) fXPosition[islat]=xpos[islat];
	494	}
	495
	496	AliMUONSegmentationSlatModule* AliMUONSegmentationSlat::Slat(Int_t index) const
	497	{ return ((AliMUONSegmentationSlatModule) (fSlats)[index]);}
	498
	499
	500	AliMUONSegmentationSlatModule* AliMUONSegmentationSlat::
	501	CreateSlatModule()
	502	{
	503	// Factory method for slat module
	504	return new AliMUONSegmentationSlatModule();
	505	}
	506
	507
	508
	509
	510