[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 1.7  2000/12/21 22:12:41  morsch
Clean-up of coding rule violations,

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];
//
    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	$Log$
c2c0190f	18	Revision 1.7 2000/12/21 22:12:41 morsch
	19	Clean-up of coding rule violations,
	20
de05461e	21	Revision 1.6 2000/11/06 09:20:43 morsch
	22	AliMUON delegates part of BuildGeometry() to AliMUONSegmentation using the
	23	Draw() method. This avoids code and parameter replication.
	24
aaf4addd	25	Revision 1.5 2000/10/26 19:32:04 morsch
	26	Problem with iteration over y-pads for 2nd cathode corrected.
	27
d4ee3c3e	28	Revision 1.4 2000/10/25 19:56:55 morsch
	29	Handle correctly slats with less than 3 segmentation zones.
	30
f30dea32	31	Revision 1.3 2000/10/22 16:56:32 morsch
	32	- Store chamber number as slat id.
	33
de2f6d11	34	Revision 1.2 2000/10/18 11:42:06 morsch
	35	- AliMUONRawCluster contains z-position.
	36	- Some clean-up of useless print statements during initialisations.
	37
3e1872ed	38	Revision 1.1 2000/10/06 08:59:03 morsch
	39	Segmentation classes for bending and non bending plane slat modules (A. de Falco, A. Morsch)
	40
4c503756	41	*/
	42
	43	/////////////////////////////////////////////////////
	44	// Segmentation classes for slat modules //
	45	// to be used with AluMUONSegmentationSlat //
	46	/////////////////////////////////////////////////////
	47
	48
	49	#include "AliMUONSegmentationSlatModule.h"
aaf4addd	50	#include "AliRun.h"
aaf4addd	51	#include "AliMUON.h"
4c503756	52	#include <TMath.h>
	53	#include <iostream.h>
	54
	55	#include "AliMUONSegmentationV01.h"
	56
	57	//___________________________________________
	58	ClassImp(AliMUONSegmentationSlatModule)
	59
	60	AliMUONSegmentationSlatModule::AliMUONSegmentationSlatModule()
	61	{
	62	// Default constructor
	63	fNsec=4;
	64	fNDiv = new TArrayI(fNsec);
	65	fDpxD = new TArrayF(fNsec);
	66	(fNDiv)[0]=(fNDiv)[1]=(fNDiv)[2]=(fNDiv)[3]=0;
	67	(fDpxD)[0]=(fDpxD)[1]=(fDpxD)[2]=(fDpxD)[3]=0;
	68	}
	69
	70	void AliMUONSegmentationSlatModule::SetPcbBoards(Int_t n[4])
	71	{
	72	//
	73	// Set Pcb Board segmentation zones
	74	for (Int_t i=0; i<4; i++) fPcbBoards[i]=n[i];
	75	}
	76
	77
	78	void AliMUONSegmentationSlatModule::SetPadDivision(Int_t ndiv[4])
	79	{
	80	//
	81	// Defines the pad size perp. to the anode wire (y) for different sectors.
	82	// Pad sizes are defined as integral fractions ndiv of a basis pad size
	83	// fDpx
	84	//
	85	for (Int_t i=0; i<4; i++) {
	86	(*fNDiv)[i]=ndiv[i];
	87	}
	88	ndiv[0]=ndiv[1];
	89	}
	90
	91	Float_t AliMUONSegmentationSlatModule::Dpx(Int_t isec) const
	92	{
	93	// Return x-strip width
	94	return (*fDpxD)[isec];
	95	}
	96
	97
	98	Float_t AliMUONSegmentationSlatModule::Dpy(Int_t isec) const
	99	{
	100	// Return y-strip width
	101
	102	return fDpy;
	103	}
	104
	105
	106	void AliMUONSegmentationSlatModule::
	107	GetPadI(Float_t x, Float_t y, Int_t &ix, Int_t &iy)
	108	{
	109	// Returns pad coordinates (ix,iy) for given real coordinates (x,y)
	110	//
	111	iy = Int_t(y/fDpy)+1;
	112	if (iy > fNpy) iy= fNpy;
	113	//
	114	// Find sector isec
	115
116	Int_t isec=-1;
117	for (Int_t i=fNsec-1; i > 0; i--) {
118	if (x >= fCx[i-1]) {
119	isec=i;
f30dea32	120	if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
4c503756	121	break;
	122	}
	123	}
	124
	125	if (isec>0) {
	126	ix= Int_t((x-fCx[isec-1])/(*fDpxD)[isec])
	127	+fNpxS[isec-1]+1;
	128	} else if (isec == 0) {
	129	ix= Int_t(x/(*fDpxD)[isec])+1;
	130	} else {
	131	ix=0;
	132	iy=0;
	133	}
	134	}
	135
	136	void AliMUONSegmentationSlatModule::
	137	GetPadC(Int_t ix, Int_t iy, Float_t &x, Float_t &y)
	138	{
	139	// Returns real coordinates (x,y) for given pad coordinates (ix,iy)
	140	//
	141	y = Float_t(iy*fDpy)-fDpy/2.;
	142	//
	143	// Find sector isec
	144	Int_t isec=AliMUONSegmentationSlatModule::Sector(ix,iy);
de2f6d11	145	if (isec == -1) printf("\n PadC %d %d %d %d \n ", isec, fId, ix, iy);
4c503756	146	//
	147	if (isec>0) {
	148	x = fCx[isec-1]+(ix-fNpxS[isec-1])(fDpxD)[isec];
	149	x = x-(*fDpxD)[isec]/2;
	150	} else {
	151	x=y=0;
	152	}
	153	}
	154
	155	void AliMUONSegmentationSlatModule::
	156	SetPad(Int_t ix, Int_t iy)
	157	{
	158	//
	159	// Sets virtual pad coordinates, needed for evaluating pad response
	160	// outside the tracking program
	161	GetPadC(ix,iy,fX,fY);
	162	fSector=Sector(ix,iy);
	163	}
	164
	165	void AliMUONSegmentationSlatModule::
	166	SetHit(Float_t x, Float_t y)
	167	{
de05461e	168	// Set current hit
de05461e	169	//
4c503756	170	fXhit = x;
	171	fYhit = y;
	172
	173	if (x < 0) fXhit = 0;
	174	if (y < 0) fYhit = 0;
	175
	176	if (x >= fCx[fNsec-1]) fXhit = fCx[fNsec-1];
	177	if (y >= fDyPCB) fYhit = fDyPCB;
	178
	179
	180	}
	181
	182
	183	void AliMUONSegmentationSlatModule::
	184	FirstPad(Float_t xhit, Float_t yhit, Float_t dx, Float_t dy)
	185	{
	186	// Initialises iteration over pads for charge distribution algorithm
	187	//
	188	//
	189	// Find the wire position (center of charge distribution)
	190	Float_t x0a=GetAnod(xhit);
	191	fXhit=x0a;
	192	fYhit=yhit;
	193	//
	194	// and take fNsigma*sigma around this center
	195	Float_t x01=x0a - dx;
	196	Float_t x02=x0a + dx;
	197	Float_t y01=yhit - dy;
	198	Float_t y02=yhit + dy;
4c503756	199	if (x01 < 0) x01 = 0;
4c503756	200	if (y01 < 0) y01 = 0;
f30dea32	201
f30dea32	202	if (x02 >= fCx[fNsec-1]) x02 = fCx[fNsec-1];
d4ee3c3e	203
4c503756	204
f30dea32	205
4c503756	206	Int_t isec=-1;
	207	for (Int_t i=fNsec-1; i > 0; i--) {
	208	if (x02 >= fCx[i-1]) {
	209	isec=i;
f30dea32	210	if (fCx[isec] == fCx[isec-1] && isec > 1) isec--;
4c503756	211	break;
	212	}
	213	}
d4ee3c3e	214	y02 += Dpy(isec);
d4ee3c3e	215	if (y02 >= fDyPCB) y02 = fDyPCB;
4c503756	216
4c503756	217	//
	218	// find the pads over which the charge distributes
	219	GetPadI(x01,y01,fIxmin,fIymin);
	220	GetPadI(x02,y02,fIxmax,fIymax);
f30dea32	221
4c503756	222	if (fIxmax > fNpx) fIxmax=fNpx;
4c503756	223	if (fIymax > fNpyS[isec]) fIymax = fNpyS[isec];
d4ee3c3e	224
4c503756	225	fXmin=x01;
d4ee3c3e	226	fXmax=x02;
4c503756	227	fYmin=y01;
d4ee3c3e	228	fYmax=y02;
d4ee3c3e	229
4c503756	230	//
	231	// Set current pad to lower left corner
	232	if (fIxmax < fIxmin) fIxmax=fIxmin;
	233	if (fIymax < fIymin) fIymax=fIymin;
	234	fIx=fIxmin;
	235	fIy=fIymin;
	236
	237	GetPadC(fIx,fIy,fX,fY);
	238	fSector=Sector(fIx,fIy);
d4ee3c3e	239	/*
	240	printf("\n \n First Pad: %d %d %f %f %d %d %d %f" ,
	241	fIxmin, fIxmax, fXmin, fXmax, fNpx, fId, isec, Dpy(isec));
	242	printf("\n \n First Pad: %d %d %f %f %d %d %d %f",
	243	fIymin, fIymax, fYmin, fYmax, fNpyS[isec], fId, isec, Dpy(isec));
	244	*/
4c503756	245	}
	246
	247	void AliMUONSegmentationSlatModule::NextPad()
	248	{
	249	// Stepper for the iteration over pads
	250	//
	251	// Step to next pad in the integration region
	252	// step from left to right
	253	if (fIx != fIxmax) {
	254	fIx++;
	255	GetPadC(fIx,fIy,fX,fY);
	256	fSector=Sector(fIx,fIy);
	257	// step up
	258	} else if (fIy != fIymax) {
	259	fIx=fIxmin;
	260	fIy++;
	261	GetPadC(fIx,fIy,fX,fY);
	262	fSector=Sector(fIx,fIy);
	263
	264	} else {
	265	fIx=-1;
	266	fIy=-1;
	267	}
	268	// printf("\n Next Pad %d %d %f %f %d %d %d %d %d ",
	269	}
	270
	271
	272	Int_t AliMUONSegmentationSlatModule::MorePads()
de05461e	273	{
4c503756	274	// Stopping condition for the iterator over pads
	275	//
	276	// Are there more pads in the integration region
4c503756	277
	278	return (fIx != -1 \|\| fIy != -1);
	279	}
	280
	281
	282	Int_t AliMUONSegmentationSlatModule::Sector(Int_t ix, Int_t iy)
	283	{
	284	//
	285	// Determine segmentation zone from pad coordinates
	286	//
	287	Int_t isec=-1;
	288	for (Int_t i=0; i < fNsec; i++) {
	289	if (ix <= fNpxS[i]) {
	290	isec=i;
	291	break;
	292	}
	293	}
	294	if (isec == -1) printf("\n Sector: Attention isec ! %d %d %d %d \n",
	295	fId, ix, iy,fNpxS[3]);
	296
	297	return isec;
	298
	299	}
	300
	301	void AliMUONSegmentationSlatModule::
	302	IntegrationLimits(Float_t& x1,Float_t& x2,Float_t& y1, Float_t& y2)
	303	{
	304	// Returns integration limits for current pad
	305	//
	306
	307	x1=fXhit-fX-Dpx(fSector)/2.;
	308	x2=x1+Dpx(fSector);
	309	y1=fYhit-fY-Dpy(fSector)/2.;
	310	y2=y1+Dpy(fSector);
	311	// printf("\n Integration Limits %f %f %f %f %d %f", x1, x2, y1, y2, fSector, Dpx(fSector));
	312
	313	}
	314
	315	void AliMUONSegmentationSlatModule::
	316	Neighbours(Int_t iX, Int_t iY, Int_t* Nlist, Int_t Xlist[10], Int_t Ylist[10])
	317	{
	318	// Returns list of next neighbours for given Pad (iX, iY)
	319	//
	320	//
	321	Int_t i=0;
	322	//
	323	// step right
	324	if (iX+1 <= fNpx) {
	325	Xlist[i]=iX+1;
	326	Ylist[i++]=iY;
	327	}
	328	//
	329	// step left
	330	if (iX-1 > 0) {
	331	Xlist[i]=iX-1;
	332	Ylist[i++]=iY;
	333	}
	334
	335	//
	336	// step up
	337	if (iY+1 <= fNpy) {
	338	Xlist[i]=iX;
	339	Ylist[i++]=iY+1;
	340	}
341	//
342	// step down
343	if (iY-1 > 0) {
344	Xlist[i]=iX;
345	Ylist[i++]=iY-1;
346	}
347
348	*Nlist=i;
349	}
350
351
352	void AliMUONSegmentationSlatModule::Init(Int_t chamber)
353	{
4c503756	354	//
	355	// Fill the arrays fCx (x-contour) and fNpxS (ix-contour) for each sector
	356	// These arrays help in converting from real to pad co-ordinates and
	357	// vice versa
	358	//
	359	// Segmentation is defined by rectangular modules approximating
	360	// concentric circles as shown below
	361	//
	362	// PCB module size in cm
de05461e	363	printf("\n Initialise Segmentation SlatModule \n");
de05461e	364
4c503756	365	fDxPCB=40;
	366	fDyPCB=40;
	367	//
	368	// number of pad rows per PCB
	369	//
	370	Int_t nPyPCB=Int_t(fDyPCB/fDpy);
	371	//
	372	// maximum number of pad rows
	373	fNpy=nPyPCB;
	374	//
	375	// Calculate padsize along x
	376	(*fDpxD)[fNsec-1]=fDpx;
	377	if (fNsec > 1) {
	378	for (Int_t i=fNsec-2; i>=0; i--){
	379	(fDpxD)[i]=(fDpxD)[fNsec-1]/(*fNDiv)[i];
4c503756	380	}
	381	}
	382	//
	383	// fill the arrays defining the pad segmentation boundaries
	384	//
	385	//
	386	// Loop over sectors (isec=0 is the dead space surounding the beam pipe)
	387	for (Int_t isec=0; isec<4; isec++) {
	388	if (isec==0) {
	389	fNpxS[0] = 0;
	390	fNpyS[0] = 0;
	391	fCx[0] = 0;
	392	} else {
	393	fNpxS[isec]=fNpxS[isec-1] + fPcbBoards[isec]Int_t(fDxPCB/(fDpxD)[isec]);
	394	fNpyS[isec]=fNpy;
	395	fCx[isec]=fCx[isec-1] + fPcbBoards[isec]*fDxPCB;
	396	}
	397	} // sectors
	398	// maximum number of pad rows
	399	fNpy=nPyPCB;
	400	fNpx=fNpxS[3];
de2f6d11	401	//
de2f6d11	402	fId = chamber;
4c503756	403	}
	404
	405
	406
	407
	408
	409
	410
	411
	412
	413
	414
	415