[u/mrichter/AliRoot.git] / MUON / AliMUONSegmentationSlatModule.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 1.6  2000/11/06 09:20:43  morsch
AliMUON delegates part of BuildGeometry() to AliMUONSegmentation using the
Draw() method. This avoids code and parameter replication.

Revision 1.5  2000/10/26 19:32:04  morsch
Problem with iteration over y-pads for 2nd cathode corrected.

Revision 1.4  2000/10/25 19:56:55  morsch
Handle correctly slats with less than 3 segmentation zones.

Revision 1.3  2000/10/22 16:56:32  morsch
- Store chamber number as slat id.

Revision 1.2  2000/10/18 11:42:06  morsch
- AliMUONRawCluster contains z-position.
- Some clean-up of useless print statements during initialisations.

Revision 1.1  2000/10/06 08:59:03  morsch
Segmentation classes for bending and non bending plane slat modules (A. de Falco, A. Morsch)

*/

/////////////////////////////////////////////////////
//  Segmentation classes for slat modules          //
//  to be used with AluMUONSegmentationSlat        //
/////////////////////////////////////////////////////


#include "AliMUONSegmentationSlatModule.h"
#include "AliRun.h"
#include "AliMUON.h"
#include <TMath.h>
#include <iostream.h>

#include "AliMUONSegmentationV01.h"

//___________________________________________
ClassImp(AliMUONSegmentationSlatModule)

AliMUONSegmentationSlatModule::AliMUONSegmentationSlatModule() 
{
// Default constructor
    fNsec=4;
    fNDiv = new TArrayI(fNsec);      
    fDpxD = new TArrayF(fNsec);      
    (*fNDiv)[0]=(*fNDiv)[1]=(*fNDiv)[2]=(*fNDiv)[3]=0;     
    (*fDpxD)[0]=(*fDpxD)[1]=(*fDpxD)[2]=(*fDpxD)[3]=0;     
}

void AliMUONSegmentationSlatModule::SetPcbBoards(Int_t n[4])
{
//
// Set Pcb Board segmentation zones
    for (Int_t i=0; i<4; i++) fPcbBoards[i]=n[i];
}


void AliMUONSegmentationSlatModule::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];
    }
    ndiv[0]=ndiv[1];
}

Float_t AliMUONSegmentationSlatModule::Dpx(Int_t isec) const
{
// Return x-strip width
    return (*fDpxD)[isec];
} 


Float_t AliMUONSegmentationSlatModule::Dpy(Int_t isec) const
{
// Return y-strip width

    return fDpy;
}


void AliMUONSegmentationSlatModule::
GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy) 
{
//  Returns pad coordinates (ix,iy) for given real coordinates (x,y)
//
    iy = Int_t(y/fDpy)+1;
    if (iy >  fNpy) iy= fNpy;
//
//  Find sector isec
    
    Int_t isec=-1;
    for (Int_t i=fNsec-1; i > 0; i--) {
	if (x >= fCx[i-1]) {
	    isec=i;
	    if (fCx[isec] == fCx[isec-1]  && isec > 1) isec--;
	    break;
	}
    }

    if (isec>0) {
	ix= Int_t((x-fCx[isec-1])/(*fDpxD)[isec])
	    +fNpxS[isec-1]+1;
    } else if (isec == 0) {
	ix= Int_t(x/(*fDpxD)[isec])+1;
    } else {
	ix=0;
	iy=0;
    }
}

void AliMUONSegmentationSlatModule::
GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y) 
{
//  Returns real coordinates (x,y) for given pad coordinates (ix,iy)
//
    y = Float_t(iy*fDpy)-fDpy/2.;
//
//  Find sector isec
    Int_t isec=AliMUONSegmentationSlatModule::Sector(ix,iy);
    if (isec == -1) printf("\n PadC %d %d %d  %d \n ", isec, fId, ix, iy);
//
    if (isec>0) {
	x = fCx[isec-1]+(ix-fNpxS[isec-1])*(*fDpxD)[isec];
	x = x-(*fDpxD)[isec]/2;
    } else {
	x=y=0;
    }
}

void AliMUONSegmentationSlatModule::
SetPad(Int_t ix, Int_t iy)
{
    //
    // Sets virtual pad coordinates, needed for evaluating pad response 
    // outside the tracking program 
    GetPadC(ix,iy,fX,fY);
    fSector=Sector(ix,iy);
}

void AliMUONSegmentationSlatModule::
SetHit(Float_t x, Float_t y)
{
// Set current hit 
//
    fXhit = x;
    fYhit = y;
    
    if (x < 0) fXhit = 0;
    if (y < 0) fYhit = 0;
    
    if (x >= fCx[fNsec-1]) fXhit = fCx[fNsec-1];
    if (y >= fDyPCB)       fYhit = fDyPCB;

    
}


void AliMUONSegmentationSlatModule::
FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy)
{
// Initialises iteration over pads for charge distribution algorithm
//
    //
    // Find the wire position (center of charge distribution)
    Float_t x0a=GetAnod(xhit);
    fXhit=x0a;
    fYhit=yhit;
    //
    // and take fNsigma*sigma around this center
    Float_t x01=x0a  - dx;
    Float_t x02=x0a  + dx;
    Float_t y01=yhit - dy;
    Float_t y02=yhit + dy;
    if (x01 < 0) x01 = 0;
    if (y01 < 0) y01 = 0;

    if (x02 >= fCx[fNsec-1]) x02 = fCx[fNsec-1];

    
    Int_t isec=-1;
    for (Int_t i=fNsec-1; i > 0; i--) {
	if (x02 >= fCx[i-1]) {
	    isec=i;
	    if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
	    break;
	}
    }
    y02 += Dpy(isec);
    if (y02 >= fDyPCB) y02 = fDyPCB;
   
    //
    // find the pads over which the charge distributes
    GetPadI(x01,y01,fIxmin,fIymin);
    GetPadI(x02,y02,fIxmax,fIymax);
    
    if (fIxmax > fNpx) fIxmax=fNpx;
    if (fIymax > fNpyS[isec]) fIymax = fNpyS[isec];    

    fXmin=x01;
    fXmax=x02;    
    fYmin=y01;
    fYmax=y02;    
  
    // 
    // Set current pad to lower left corner
    if (fIxmax < fIxmin) fIxmax=fIxmin;
    if (fIymax < fIymin) fIymax=fIymin;    
    fIx=fIxmin;
    fIy=fIymin;
    
    GetPadC(fIx,fIy,fX,fY);
    fSector=Sector(fIx,fIy);
/*
    printf("\n \n First Pad: %d %d %f %f %d %d %d %f" , 
	   fIxmin, fIxmax, fXmin, fXmax, fNpx, fId, isec, Dpy(isec));    
    printf("\n \n First Pad: %d %d %f %f %d %d %d %f",
	   fIymin, fIymax, fYmin, fYmax,  fNpyS[isec], fId, isec, Dpy(isec));
*/
}

void AliMUONSegmentationSlatModule::NextPad()
{
// Stepper for the iteration over pads
//
// Step to next pad in the integration region
//  step from left to right    
    if (fIx != fIxmax) {
	fIx++;
	GetPadC(fIx,fIy,fX,fY);
	fSector=Sector(fIx,fIy);
//  step up 
    } else if (fIy != fIymax) {
	fIx=fIxmin;
	fIy++;
	GetPadC(fIx,fIy,fX,fY);
	fSector=Sector(fIx,fIy);

    } else {
	fIx=-1;
	fIy=-1;
    }
//    printf("\n Next Pad %d %d %f %f %d %d %d %d %d ", 
}


Int_t AliMUONSegmentationSlatModule::MorePads()
{
// Stopping condition for the iterator over pads
//
// Are there more pads in the integration region
    
    return  (fIx != -1  || fIy != -1);
}


Int_t AliMUONSegmentationSlatModule::Sector(Int_t ix, Int_t iy) 
{
//
// Determine segmentation zone from pad coordinates
//
    Int_t isec=-1;
    for (Int_t i=0; i < fNsec; i++) {
	if (ix <= fNpxS[i]) {
	    isec=i;
	    break;
	}
    }
    if (isec == -1) printf("\n Sector: Attention isec ! %d %d %d %d \n",
			   fId, ix, iy,fNpxS[3]);

    return isec;

}

void AliMUONSegmentationSlatModule::
IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2) 
{
//  Returns integration limits for current pad
//

    x1=fXhit-fX-Dpx(fSector)/2.;
    x2=x1+Dpx(fSector);
    y1=fYhit-fY-Dpy(fSector)/2.;
    y2=y1+Dpy(fSector);    
//    printf("\n Integration Limits %f %f %f %f %d %f", x1, x2, y1, y2, fSector, Dpx(fSector));

}

void AliMUONSegmentationSlatModule::
Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10]) 
{
// Returns list of next neighbours for given Pad (iX, iY)
//
//
    Int_t i=0;
//    
//  step right
    if (iX+1 <= fNpx) {
	Xlist[i]=iX+1;
	Ylist[i++]=iY;
    }
//
//  step left    
    if (iX-1 > 0) {
	Xlist[i]=iX-1;
	Ylist[i++]=iY;
    }

//    
//  step up
    if (iY+1 <= fNpy) {
	Xlist[i]=iX;
	Ylist[i++]=iY+1;
    }
//
//  step down    
    if (iY-1 > 0) {
	Xlist[i]=iX;
	Ylist[i++]=iY-1;
    }

    *Nlist=i;
}


void AliMUONSegmentationSlatModule::Init(Int_t chamber)
{
//
//  Fill the arrays fCx (x-contour) and fNpxS (ix-contour) for each sector
//  These arrays help in converting from real to pad co-ordinates and
//  vice versa
//   
//  Segmentation is defined by rectangular modules approximating
//  concentric circles as shown below
//
//  PCB module size in cm
    printf("\n Initialise Segmentation SlatModule \n");

    fDxPCB=40;
    fDyPCB=40;
//
// number of pad rows per PCB
//    
    Int_t nPyPCB=Int_t(fDyPCB/fDpy);
//
// maximum number of pad rows    
    fNpy=nPyPCB;
//
//  Calculate padsize along x
    (*fDpxD)[fNsec-1]=fDpx;
    if (fNsec > 1) {
	for (Int_t i=fNsec-2; i>=0; i--){
	    (*fDpxD)[i]=(*fDpxD)[fNsec-1]/(*fNDiv)[i];
	}
    }
//
// fill the arrays defining the pad segmentation boundaries
//
//  
//  Loop over sectors (isec=0 is the dead space surounding the beam pipe)
    for (Int_t isec=0; isec<4; isec++) {
	if (isec==0) {
	    fNpxS[0] = 0;
	    fNpyS[0] = 0;
	    fCx[0]   = 0;
	} else {
	    fNpxS[isec]=fNpxS[isec-1] + fPcbBoards[isec]*Int_t(fDxPCB/(*fDpxD)[isec]);
	    fNpyS[isec]=fNpy;
	    fCx[isec]=fCx[isec-1] + fPcbBoards[isec]*fDxPCB;
	}
    } // sectors
// maximum number of pad rows    
    fNpy=nPyPCB;
    fNpx=fNpxS[3];
//
    AliMUON *pMUON  = (AliMUON *) gAlice->GetModule("MUON");
    fId = chamber;
}
Commit	Line	Data
4c503756	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	$Log$
de05461e	18	Revision 1.6 2000/11/06 09:20:43 morsch
	19	AliMUON delegates part of BuildGeometry() to AliMUONSegmentation using the
	20	Draw() method. This avoids code and parameter replication.
	21
aaf4addd	22	Revision 1.5 2000/10/26 19:32:04 morsch
	23	Problem with iteration over y-pads for 2nd cathode corrected.
	24
d4ee3c3e	25	Revision 1.4 2000/10/25 19:56:55 morsch
	26	Handle correctly slats with less than 3 segmentation zones.
	27
f30dea32	28	Revision 1.3 2000/10/22 16:56:32 morsch
	29	- Store chamber number as slat id.
	30
de2f6d11	31	Revision 1.2 2000/10/18 11:42:06 morsch
	32	- AliMUONRawCluster contains z-position.
	33	- Some clean-up of useless print statements during initialisations.
	34
3e1872ed	35	Revision 1.1 2000/10/06 08:59:03 morsch
	36	Segmentation classes for bending and non bending plane slat modules (A. de Falco, A. Morsch)
	37
4c503756	38	*/
	39
	40	/////////////////////////////////////////////////////
	41	// Segmentation classes for slat modules //
	42	// to be used with AluMUONSegmentationSlat //
	43	/////////////////////////////////////////////////////
	44
	45
	46	#include "AliMUONSegmentationSlatModule.h"
aaf4addd	47	#include "AliRun.h"
aaf4addd	48	#include "AliMUON.h"
4c503756	49	#include <TMath.h>
	50	#include <iostream.h>
	51
	52	#include "AliMUONSegmentationV01.h"
	53
	54	//___________________________________________
	55	ClassImp(AliMUONSegmentationSlatModule)
	56
	57	AliMUONSegmentationSlatModule::AliMUONSegmentationSlatModule()
	58	{
	59	// Default constructor
	60	fNsec=4;
	61	fNDiv = new TArrayI(fNsec);
	62	fDpxD = new TArrayF(fNsec);
	63	(fNDiv)[0]=(fNDiv)[1]=(fNDiv)[2]=(fNDiv)[3]=0;
	64	(fDpxD)[0]=(fDpxD)[1]=(fDpxD)[2]=(fDpxD)[3]=0;
	65	}
	66
	67	void AliMUONSegmentationSlatModule::SetPcbBoards(Int_t n[4])
	68	{
	69	//
	70	// Set Pcb Board segmentation zones
	71	for (Int_t i=0; i<4; i++) fPcbBoards[i]=n[i];
	72	}
	73
	74
	75	void AliMUONSegmentationSlatModule::SetPadDivision(Int_t ndiv[4])
	76	{
	77	//
	78	// Defines the pad size perp. to the anode wire (y) for different sectors.
	79	// Pad sizes are defined as integral fractions ndiv of a basis pad size
	80	// fDpx
	81	//
	82	for (Int_t i=0; i<4; i++) {
	83	(*fNDiv)[i]=ndiv[i];
	84	}
	85	ndiv[0]=ndiv[1];
	86	}
	87
	88	Float_t AliMUONSegmentationSlatModule::Dpx(Int_t isec) const
	89	{
	90	// Return x-strip width
	91	return (*fDpxD)[isec];
	92	}
	93
	94
	95	Float_t AliMUONSegmentationSlatModule::Dpy(Int_t isec) const
	96	{
	97	// Return y-strip width
	98
	99	return fDpy;
	100	}
	101
	102
	103	void AliMUONSegmentationSlatModule::
	104	GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy)
	105	{
	106	// Returns pad coordinates (ix,iy) for given real coordinates (x,y)
	107	//
	108	iy = Int_t(y/fDpy)+1;
	109	if (iy > fNpy) iy= fNpy;
	110	//
	111	// Find sector isec
	112
113	Int_t isec=-1;
114	for (Int_t i=fNsec-1; i > 0; i--) {
115	if (x >= fCx[i-1]) {
116	isec=i;
f30dea32	117	if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
4c503756	118	break;
	119	}
	120	}
	121
	122	if (isec>0) {
	123	ix= Int_t((x-fCx[isec-1])/(*fDpxD)[isec])
	124	+fNpxS[isec-1]+1;
	125	} else if (isec == 0) {
	126	ix= Int_t(x/(*fDpxD)[isec])+1;
	127	} else {
	128	ix=0;
	129	iy=0;
	130	}
	131	}
	132
	133	void AliMUONSegmentationSlatModule::
	134	GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y)
	135	{
	136	// Returns real coordinates (x,y) for given pad coordinates (ix,iy)
	137	//
	138	y = Float_t(iy*fDpy)-fDpy/2.;
	139	//
	140	// Find sector isec
	141	Int_t isec=AliMUONSegmentationSlatModule::Sector(ix,iy);
de2f6d11	142	if (isec == -1) printf("\n PadC %d %d %d %d \n ", isec, fId, ix, iy);
4c503756	143	//
	144	if (isec>0) {
	145	x = fCx[isec-1]+(ix-fNpxS[isec-1])(fDpxD)[isec];
	146	x = x-(*fDpxD)[isec]/2;
	147	} else {
	148	x=y=0;
	149	}
	150	}
	151
	152	void AliMUONSegmentationSlatModule::
	153	SetPad(Int_t ix, Int_t iy)
	154	{
	155	//
	156	// Sets virtual pad coordinates, needed for evaluating pad response
	157	// outside the tracking program
	158	GetPadC(ix,iy,fX,fY);
	159	fSector=Sector(ix,iy);
	160	}
	161
	162	void AliMUONSegmentationSlatModule::
	163	SetHit(Float_t x, Float_t y)
	164	{
de05461e	165	// Set current hit
de05461e	166	//
4c503756	167	fXhit = x;
	168	fYhit = y;
	169
	170	if (x < 0) fXhit = 0;
	171	if (y < 0) fYhit = 0;
	172
	173	if (x >= fCx[fNsec-1]) fXhit = fCx[fNsec-1];
	174	if (y >= fDyPCB) fYhit = fDyPCB;
	175
	176
	177	}
	178
	179
	180	void AliMUONSegmentationSlatModule::
	181	FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy)
	182	{
	183	// Initialises iteration over pads for charge distribution algorithm
	184	//
	185	//
	186	// Find the wire position (center of charge distribution)
	187	Float_t x0a=GetAnod(xhit);
	188	fXhit=x0a;
	189	fYhit=yhit;
	190	//
	191	// and take fNsigma*sigma around this center
	192	Float_t x01=x0a - dx;
	193	Float_t x02=x0a + dx;
	194	Float_t y01=yhit - dy;
	195	Float_t y02=yhit + dy;
4c503756	196	if (x01 < 0) x01 = 0;
4c503756	197	if (y01 < 0) y01 = 0;
f30dea32	198
f30dea32	199	if (x02 >= fCx[fNsec-1]) x02 = fCx[fNsec-1];
d4ee3c3e	200
4c503756	201
f30dea32	202
4c503756	203	Int_t isec=-1;
	204	for (Int_t i=fNsec-1; i > 0; i--) {
	205	if (x02 >= fCx[i-1]) {
	206	isec=i;
f30dea32	207	if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
4c503756	208	break;
	209	}
	210	}
d4ee3c3e	211	y02 += Dpy(isec);
d4ee3c3e	212	if (y02 >= fDyPCB) y02 = fDyPCB;
4c503756	213
4c503756	214	//
	215	// find the pads over which the charge distributes
	216	GetPadI(x01,y01,fIxmin,fIymin);
	217	GetPadI(x02,y02,fIxmax,fIymax);
f30dea32	218
4c503756	219	if (fIxmax > fNpx) fIxmax=fNpx;
4c503756	220	if (fIymax > fNpyS[isec]) fIymax = fNpyS[isec];
d4ee3c3e	221
4c503756	222	fXmin=x01;
d4ee3c3e	223	fXmax=x02;
4c503756	224	fYmin=y01;
d4ee3c3e	225	fYmax=y02;
d4ee3c3e	226
4c503756	227	//
	228	// Set current pad to lower left corner
	229	if (fIxmax < fIxmin) fIxmax=fIxmin;
	230	if (fIymax < fIymin) fIymax=fIymin;
	231	fIx=fIxmin;
	232	fIy=fIymin;
	233
	234	GetPadC(fIx,fIy,fX,fY);
	235	fSector=Sector(fIx,fIy);
d4ee3c3e	236	/*
	237	printf("\n \n First Pad: %d %d %f %f %d %d %d %f" ,
	238	fIxmin, fIxmax, fXmin, fXmax, fNpx, fId, isec, Dpy(isec));
	239	printf("\n \n First Pad: %d %d %f %f %d %d %d %f",
	240	fIymin, fIymax, fYmin, fYmax, fNpyS[isec], fId, isec, Dpy(isec));
	241	*/
4c503756	242	}
	243
	244	void AliMUONSegmentationSlatModule::NextPad()
	245	{
	246	// Stepper for the iteration over pads
	247	//
	248	// Step to next pad in the integration region
	249	// step from left to right
	250	if (fIx != fIxmax) {
	251	fIx++;
	252	GetPadC(fIx,fIy,fX,fY);
	253	fSector=Sector(fIx,fIy);
	254	// step up
	255	} else if (fIy != fIymax) {
	256	fIx=fIxmin;
	257	fIy++;
	258	GetPadC(fIx,fIy,fX,fY);
	259	fSector=Sector(fIx,fIy);
	260
	261	} else {
	262	fIx=-1;
	263	fIy=-1;
	264	}
	265	// printf("\n Next Pad %d %d %f %f %d %d %d %d %d ",
	266	}
	267
	268
	269	Int_t AliMUONSegmentationSlatModule::MorePads()
de05461e	270	{
4c503756	271	// Stopping condition for the iterator over pads
	272	//
	273	// Are there more pads in the integration region
4c503756	274
	275	return (fIx != -1 \|\| fIy != -1);
	276	}
	277
	278
	279	Int_t AliMUONSegmentationSlatModule::Sector(Int_t ix, Int_t iy)
	280	{
	281	//
	282	// Determine segmentation zone from pad coordinates
	283	//
	284	Int_t isec=-1;
	285	for (Int_t i=0; i < fNsec; i++) {
	286	if (ix <= fNpxS[i]) {
	287	isec=i;
	288	break;
	289	}
	290	}
	291	if (isec == -1) printf("\n Sector: Attention isec ! %d %d %d %d \n",
	292	fId, ix, iy,fNpxS[3]);
	293
	294	return isec;
	295
	296	}
	297
	298	void AliMUONSegmentationSlatModule::
	299	IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
	300	{
	301	// Returns integration limits for current pad
	302	//
	303
	304	x1=fXhit-fX-Dpx(fSector)/2.;
	305	x2=x1+Dpx(fSector);
	306	y1=fYhit-fY-Dpy(fSector)/2.;
	307	y2=y1+Dpy(fSector);
	308	// printf("\n Integration Limits %f %f %f %f %d %f", x1, x2, y1, y2, fSector, Dpx(fSector));
	309
	310	}
	311
	312	void AliMUONSegmentationSlatModule::
	313	Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10])
	314	{
	315	// Returns list of next neighbours for given Pad (iX, iY)
	316	//
	317	//
	318	Int_t i=0;
	319	//
	320	// step right
	321	if (iX+1 <= fNpx) {
	322	Xlist[i]=iX+1;
	323	Ylist[i++]=iY;
	324	}
	325	//
	326	// step left
	327	if (iX-1 > 0) {
	328	Xlist[i]=iX-1;
	329	Ylist[i++]=iY;
	330	}
	331
	332	//
	333	// step up
	334	if (iY+1 <= fNpy) {
	335	Xlist[i]=iX;
	336	Ylist[i++]=iY+1;
	337	}
338	//
339	// step down
340	if (iY-1 > 0) {
341	Xlist[i]=iX;
342	Ylist[i++]=iY-1;
343	}
344
345	*Nlist=i;
346	}
347
348
349	void AliMUONSegmentationSlatModule::Init(Int_t chamber)
350	{
4c503756	351	//
	352	// Fill the arrays fCx (x-contour) and fNpxS (ix-contour) for each sector
	353	// These arrays help in converting from real to pad co-ordinates and
	354	// vice versa
	355	//
	356	// Segmentation is defined by rectangular modules approximating
	357	// concentric circles as shown below
	358	//
	359	// PCB module size in cm
de05461e	360	printf("\n Initialise Segmentation SlatModule \n");
de05461e	361
4c503756	362	fDxPCB=40;
	363	fDyPCB=40;
	364	//
	365	// number of pad rows per PCB
	366	//
	367	Int_t nPyPCB=Int_t(fDyPCB/fDpy);
	368	//
	369	// maximum number of pad rows
	370	fNpy=nPyPCB;
	371	//
	372	// Calculate padsize along x
	373	(*fDpxD)[fNsec-1]=fDpx;
	374	if (fNsec > 1) {
	375	for (Int_t i=fNsec-2; i>=0; i--){
	376	(fDpxD)[i]=(fDpxD)[fNsec-1]/(*fNDiv)[i];
4c503756	377	}
	378	}
	379	//
	380	// fill the arrays defining the pad segmentation boundaries
	381	//
	382	//
	383	// Loop over sectors (isec=0 is the dead space surounding the beam pipe)
	384	for (Int_t isec=0; isec<4; isec++) {
	385	if (isec==0) {
	386	fNpxS[0] = 0;
	387	fNpyS[0] = 0;
	388	fCx[0] = 0;
	389	} else {
	390	fNpxS[isec]=fNpxS[isec-1] + fPcbBoards[isec]Int_t(fDxPCB/(fDpxD)[isec]);
	391	fNpyS[isec]=fNpy;
	392	fCx[isec]=fCx[isec-1] + fPcbBoards[isec]*fDxPCB;
	393	}
	394	} // sectors
	395	// maximum number of pad rows
	396	fNpy=nPyPCB;
	397	fNpx=fNpxS[3];
de2f6d11	398	//
aaf4addd	399	AliMUON pMUON = (AliMUON ) gAlice->GetModule("MUON");
de2f6d11	400	fId = chamber;
4c503756	401	}
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