[u/mrichter/AliRoot.git] / ITS / AliITSNeuralPoint.cxx

///////////////////////////////////////////////////////////////
// AliITSneuralPoint                                         //
//                                                           //
// A class which resumes the information of ITS clusters     //
// in the global reference frame.                            //
// Author: A. Pulvirenti                                     //
///////////////////////////////////////////////////////////////
//#include <stdlib.h>
//#include <Riostream.h>

#include <TString.h>

#include "AliITSRecPoint.h"
#include "AliITSRecPoint.h"
#include "AliITSgeom.h"
#include "AliITSgeomMatrix.h"

#include "AliITSNeuralPoint.h"


ClassImp(AliITSNeuralPoint)
//
//------------------------------------------------------------------------------------------------------
//
AliITSNeuralPoint::AliITSNeuralPoint()
{
	// Default constructor.
	// Defines the point as a noise point in the origin.
	
	fX = fY = fZ = 0.;
	fEX = fEY = fEZ = 0.;
	fLayer = 0;
	fLabel[0] = fLabel[1] = fLabel[2] = -1;
	fModule = 0;
	fIndex = 0;
	fUser = 0;
}
//
//------------------------------------------------------------------------------------------------------
//
AliITSNeuralPoint::AliITSNeuralPoint(AliITSNeuralPoint *p) :
fX(p->fX), fY(p->fY), fZ(p->fZ), fEX(p->fEX), fEY(p->fEY), fEZ(p->fEZ)
{
	// Modified copy constructor.
	// Accepts a pointer to a like object and copies its datamembers.
	
	fLayer = p->fLayer;
	for (Int_t i = 0; i < 3; i++) fLabel[i] = p->fLabel[i];
	fModule = p->fModule;
	fIndex = p->fIndex;
	fUser = p->fUser;
	fCharge = p->fCharge;
}
//
//------------------------------------------------------------------------------------------------------
//
AliITSNeuralPoint::AliITSNeuralPoint(AliITSRecPoint *rp, AliITSgeomMatrix *gm)
{
	// Conversion constructor.
	// Accepts a AliITSRecPoint and a AliITSgeomMatrix,
	// and converts the local coord of the AliITSRecPoint object into global
	
	Int_t i, k;
	Double_t locPos[3], globPos[3], locErr[3][3], globErr[3][3];
	for (i = 0; i < 3; i++) {
		globPos[i] = 0.0;
		for (k = 0; k < 3; k++) {
			locErr[i][k] = 0.0;
			globErr[i][k] = 0.0;
		}
	}
	
	// local to global conversions of coords
	locPos[0] = rp->GetDetLocalX();
	locPos[1] = 0.0;
	locPos[2] = rp->GetDetLocalZ();
	gm->LtoGPosition(locPos, globPos);
	fX = globPos[0];
	fY = globPos[1];
	fZ = globPos[2];

	// local to global conversions of sigmas
	locErr[0][0] = rp->GetSigmaDetLocX2();
	locErr[2][2] = rp->GetSigmaZ2();
	gm->LtoGPositionError(locErr, globErr);
	for (i = 0; i < 3; i++) fLabel[i] = rp->GetLabel(i);
	fEX = TMath::Sqrt(globErr[0][0]);
	fEY = TMath::Sqrt(globErr[1][1]);
	fEZ = TMath::Sqrt(globErr[2][2]);

	// copy of other data-members
	fCharge = rp->GetQ();
	fLayer = 0;
	fIndex = 0;
	fModule = 0;
	fUser = 0;
}
//
//-------------------------------------------------------------------------------------------------
//
AliITSNeuralPoint::AliITSNeuralPoint
(AliITSRecPoint *rp, AliITSgeom *geom, Short_t module, Short_t index)
{
	// Conversion constructor.
	// Accepts a AliITSRecPoint and an AliITSgeom,
	// and converts the local coord of the AliITSRecPoint object into global
	
	Int_t mod = (Int_t)module, lay, lad, det;
	fModule = module;
	fIndex = index;
	geom->GetModuleId(mod, lay, lad, det);
	fLayer = (Short_t)lay;
	
	Double_t rot[9];  
	Float_t tx, ty, tz;
	geom->GetRotMatrix(fModule, rot);
	geom->GetTrans(fLayer, lad, det, tx, ty, tz);
	
	Double_t r, phi, cosPhi, sinPhi;
	r = -tx*rot[1] + ty*rot[0];
	if (lay == 1) r = -r;
	phi = TMath::ATan2(rot[1], rot[0]);
	if (lay==1) phi -= 3.1415927;
	cosPhi = TMath::Cos(phi);
	sinPhi = TMath::Sin(phi);
	fX =  r*cosPhi + rp->GetY()*sinPhi;
	fY = -r*sinPhi + rp->GetY()*cosPhi;
	fZ = rp->GetZ();
	fEX = TMath::Sqrt(rp->GetSigmaY2())*sinPhi;
	fEY = TMath::Sqrt(rp->GetSigmaY2())*cosPhi;
	fEZ = TMath::Sqrt(rp->GetSigmaZ2());
	fLayer--;
}
//
//-------------------------------------------------------------------------------------------------
//
Double_t AliITSNeuralPoint::GetPhi() const
{
	// Returns the azimuthal coordinate in the range 0-2pi
	Double_t q;
	q = TMath::ATan2(fY,fX); 
	if (q >= 0.) 
		return q;
	else 
		return q + 2.0*TMath::Pi();
}
//
//------------------------------------------------------------------------------------------------------
//
Double_t AliITSNeuralPoint::GetError(Option_t *option)
{
// Returns the error or the square error of
// values related to the coordinates in different systems.
// The option argument specifies the coordinate error desired:
//
// "R2"     --> error in transverse radius
// "R3"     --> error in spherical radius
// "PHI"    --> error in azimuthal angle
// "THETA"  --> error in polar angle
// "SQ"     --> get the square of error
//
// In order to get the error on the cartesian coordinates
// reference to the inline ErrX(), ErrY() adn ErrZ() methods.

	TString opt(option);
	Double_t errorSq = 0.0;
	opt.ToUpper();

	if (opt.Contains("R2")) {
		errorSq  = fX*fX*fEX*fEX + fY*fY*fEY*fEY;
		errorSq /= GetR2sq();
	}
	else if (opt.Contains("R3")) {
		errorSq  = fX*fX*fEX*fEX + fY*fY*fEY*fEY + fZ*fZ*fEZ*fEZ;
		errorSq /= GetR3sq();
	}
	else if (opt.Contains("PHI")) {
		errorSq  = fY*fY*fEX*fEX;
		errorSq += fX*fX*fEY*fEY;
		errorSq /= GetR2sq() * GetR2sq();
	}
	else if (opt.Contains("THETA")) {
		errorSq = fZ*fZ * (fX*fX*fEX*fEX + fY*fY*fEY*fEY);
		errorSq += GetR2sq() * GetR2sq() * fEZ*fEZ;
		errorSq /= GetR3sq() * GetR3sq() * GetR2() * GetR2();
	}
	
	if (!opt.Contains("SQ")) 
		return TMath::Sqrt(errorSq);
	else 
		return errorSq;
}
//
//------------------------------------------------------------------------------------------------------
//
Bool_t AliITSNeuralPoint::HasID(Int_t ID) const
{
// Checks if the recpoint belongs to the GEANT track
// whose label is specified in the argument
	if (ID<0) 
		return kFALSE; 
	else 
		return (fLabel[0]==ID || fLabel[1]==ID || fLabel[2]==ID);
}
//
//------------------------------------------------------------------------------------------------------
//
Int_t* AliITSNeuralPoint::SharedID(AliITSNeuralPoint *p) const
{
// Checks if there is a GEANT track owning both
// <this> and the recpoint in the argument
// The return value is an array of 4 integers.
// The firs integer returns the count of matches between labels of 
// <this> and labels of the argument (0 to 3)
// The other three return the matched labels.
// If a NULL pointer is passed, the array will be returned as:
// {0, -1, -1, -1}

	Int_t i, *shared = new Int_t[4];
	for (i = 0; i < 4; i++) shared[i] = -1;
	shared[0] = 0;
	if (!p) return shared;
	for (i = 0; i < 3; i++) {
		if (HasID(p->fLabel[i])) shared[i + 1] = p->fLabel[i];
		shared[0]++;
	}
	return shared;
}
//
//
//
void AliITSNeuralPoint::ConfMap(Double_t vx, Double_t vy)
{
// Performs conformal mapping vertex-constrained

	Double_t dx = fX - vx;
	Double_t dy = vy - fY;
	Double_t r2 = dx*dx + dy*dy;
	fConfX = dx / r2;
	fConfY = dy / r2;
}
Commit	Line	Data
7d62fb64	1	///////////////////////////////////////////////////////////////
	2	// AliITSneuralPoint //
	3	// //
	4	// A class which resumes the information of ITS clusters //
	5	// in the global reference frame. //
	6	// Author: A. Pulvirenti //
	7	///////////////////////////////////////////////////////////////
853a0f19	8	//#include <stdlib.h>
853a0f19	9	//#include <Riostream.h>
b9d722bc	10
	11	#include <TString.h>
	12
	13	#include "AliITSRecPoint.h"
00a7cc50	14	#include "AliITSRecPoint.h"
b9d722bc	15	#include "AliITSgeom.h"
	16	#include "AliITSgeomMatrix.h"
	17
	18	#include "AliITSNeuralPoint.h"
	19
	20
	21	ClassImp(AliITSNeuralPoint)
	22	//
	23	//------------------------------------------------------------------------------------------------------
	24	//
	25	AliITSNeuralPoint::AliITSNeuralPoint()
	26	{
	27	// Default constructor.
	28	// Defines the point as a noise point in the origin.
	29
	30	fX = fY = fZ = 0.;
	31	fEX = fEY = fEZ = 0.;
	32	fLayer = 0;
	33	fLabel[0] = fLabel[1] = fLabel[2] = -1;
	34	fModule = 0;
	35	fIndex = 0;
	36	fUser = 0;
	37	}
	38	//
	39	//------------------------------------------------------------------------------------------------------
	40	//
	41	AliITSNeuralPoint::AliITSNeuralPoint(AliITSNeuralPoint *p) :
	42	fX(p->fX), fY(p->fY), fZ(p->fZ), fEX(p->fEX), fEY(p->fEY), fEZ(p->fEZ)
	43	{
	44	// Modified copy constructor.
	45	// Accepts a pointer to a like object and copies its datamembers.
	46
	47	fLayer = p->fLayer;
	48	for (Int_t i = 0; i < 3; i++) fLabel[i] = p->fLabel[i];
	49	fModule = p->fModule;
	50	fIndex = p->fIndex;
	51	fUser = p->fUser;
	52	fCharge = p->fCharge;
	53	}
	54	//
	55	//------------------------------------------------------------------------------------------------------
	56	//
	57	AliITSNeuralPoint::AliITSNeuralPoint(AliITSRecPoint rp, AliITSgeomMatrix gm)
	58	{
	59	// Conversion constructor.
	60	// Accepts a AliITSRecPoint and a AliITSgeomMatrix,
	61	// and converts the local coord of the AliITSRecPoint object into global
	62
	63	Int_t i, k;
	64	Double_t locPos[3], globPos[3], locErr[3][3], globErr[3][3];
	65	for (i = 0; i < 3; i++) {
	66	globPos[i] = 0.0;
	67	for (k = 0; k < 3; k++) {
	68	locErr[i][k] = 0.0;
	69	globErr[i][k] = 0.0;
	70	}
	71	}
	72
	73	// local to global conversions of coords
00a7cc50	74	locPos[0] = rp->GetDetLocalX();
b9d722bc	75	locPos[1] = 0.0;
00a7cc50	76	locPos[2] = rp->GetDetLocalZ();
b9d722bc	77	gm->LtoGPosition(locPos, globPos);
	78	fX = globPos[0];
	79	fY = globPos[1];
	80	fZ = globPos[2];
	81
	82	// local to global conversions of sigmas
00a7cc50	83	locErr[0][0] = rp->GetSigmaDetLocX2();
00a7cc50	84	locErr[2][2] = rp->GetSigmaZ2();
b9d722bc	85	gm->LtoGPositionError(locErr, globErr);
00a7cc50	86	for (i = 0; i < 3; i++) fLabel[i] = rp->GetLabel(i);
b9d722bc	87	fEX = TMath::Sqrt(globErr[0][0]);
	88	fEY = TMath::Sqrt(globErr[1][1]);
	89	fEZ = TMath::Sqrt(globErr[2][2]);
	90
	91	// copy of other data-members
00a7cc50	92	fCharge = rp->GetQ();
b9d722bc	93	fLayer = 0;
	94	fIndex = 0;
	95	fModule = 0;
	96	fUser = 0;
	97	}
	98	//
	99	//-------------------------------------------------------------------------------------------------
	100	//
	101	AliITSNeuralPoint::AliITSNeuralPoint
00a7cc50	102	(AliITSRecPoint rp, AliITSgeom geom, Short_t module, Short_t index)
b9d722bc	103	{
853a0f19	104	// Conversion constructor.
00a7cc50	105	// Accepts a AliITSRecPoint and an AliITSgeom,
00a7cc50	106	// and converts the local coord of the AliITSRecPoint object into global
853a0f19	107
b9d722bc	108	Int_t mod = (Int_t)module, lay, lad, det;
	109	fModule = module;
	110	fIndex = index;
	111	geom->GetModuleId(mod, lay, lad, det);
	112	fLayer = (Short_t)lay;
	113
	114	Double_t rot[9];
	115	Float_t tx, ty, tz;
	116	geom->GetRotMatrix(fModule, rot);
	117	geom->GetTrans(fLayer, lad, det, tx, ty, tz);
	118
	119	Double_t r, phi, cosPhi, sinPhi;
	120	r = -txrot[1] + tyrot[0];
	121	if (lay == 1) r = -r;
	122	phi = TMath::ATan2(rot[1], rot[0]);
	123	if (lay==1) phi -= 3.1415927;
	124	cosPhi = TMath::Cos(phi);
	125	sinPhi = TMath::Sin(phi);
	126	fX = rcosPhi + rp->GetY()sinPhi;
	127	fY = -rsinPhi + rp->GetY()cosPhi;
	128	fZ = rp->GetZ();
	129	fEX = TMath::Sqrt(rp->GetSigmaY2())*sinPhi;
	130	fEY = TMath::Sqrt(rp->GetSigmaY2())*cosPhi;
	131	fEZ = TMath::Sqrt(rp->GetSigmaZ2());
	132	fLayer--;
	133	}
	134	//
	135	//-------------------------------------------------------------------------------------------------
	136	//
	137	Double_t AliITSNeuralPoint::GetPhi() const
b9d722bc	138	{
853a0f19	139	// Returns the azimuthal coordinate in the range 0-2pi
b9d722bc	140	Double_t q;
	141	q = TMath::ATan2(fY,fX);
	142	if (q >= 0.)
	143	return q;
	144	else
	145	return q + 2.0*TMath::Pi();
	146	}
	147	//
	148	//------------------------------------------------------------------------------------------------------
	149	//
	150	Double_t AliITSNeuralPoint::GetError(Option_t *option)
853a0f19	151	{
b9d722bc	152	// Returns the error or the square error of
	153	// values related to the coordinates in different systems.
	154	// The option argument specifies the coordinate error desired:
	155	//
	156	// "R2" --> error in transverse radius
	157	// "R3" --> error in spherical radius
	158	// "PHI" --> error in azimuthal angle
	159	// "THETA" --> error in polar angle
	160	// "SQ" --> get the square of error
	161	//
	162	// In order to get the error on the cartesian coordinates
	163	// reference to the inline ErrX(), ErrY() adn ErrZ() methods.
853a0f19	164
b9d722bc	165	TString opt(option);
	166	Double_t errorSq = 0.0;
	167	opt.ToUpper();
	168
	169	if (opt.Contains("R2")) {
	170	errorSq = fXfXfEXfEX + fYfYfEYfEY;
	171	errorSq /= GetR2sq();
	172	}
	173	else if (opt.Contains("R3")) {
	174	errorSq = fXfXfEXfEX + fYfYfEYfEY + fZfZfEZ*fEZ;
	175	errorSq /= GetR3sq();
	176	}
	177	else if (opt.Contains("PHI")) {
	178	errorSq = fYfYfEX*fEX;
	179	errorSq += fXfXfEY*fEY;
	180	errorSq /= GetR2sq() * GetR2sq();
	181	}
	182	else if (opt.Contains("THETA")) {
	183	errorSq = fZfZ (fXfXfEXfEX + fYfYfEYfEY);
	184	errorSq += GetR2sq() * GetR2sq() * fEZ*fEZ;
	185	errorSq /= GetR3sq() * GetR3sq() * GetR2() * GetR2();
	186	}
	187
	188	if (!opt.Contains("SQ"))
	189	return TMath::Sqrt(errorSq);
	190	else
	191	return errorSq;
	192	}
	193	//
	194	//------------------------------------------------------------------------------------------------------
	195	//
853a0f19	196	Bool_t AliITSNeuralPoint::HasID(Int_t ID) const
853a0f19	197	{
b9d722bc	198	// Checks if the recpoint belongs to the GEANT track
b9d722bc	199	// whose label is specified in the argument
b9d722bc	200	if (ID<0)
	201	return kFALSE;
	202	else
	203	return (fLabel[0]==ID \|\| fLabel[1]==ID \|\| fLabel[2]==ID);
	204	}
	205	//
	206	//------------------------------------------------------------------------------------------------------
	207	//
7d62fb64	208	Int_t* AliITSNeuralPoint::SharedID(AliITSNeuralPoint *p) const
853a0f19	209	{
b9d722bc	210	// Checks if there is a GEANT track owning both
	211	// <this> and the recpoint in the argument
	212	// The return value is an array of 4 integers.
	213	// The firs integer returns the count of matches between labels of
	214	// <this> and labels of the argument (0 to 3)
	215	// The other three return the matched labels.
	216	// If a NULL pointer is passed, the array will be returned as:
	217	// {0, -1, -1, -1}
853a0f19	218
b9d722bc	219	Int_t i, *shared = new Int_t[4];
	220	for (i = 0; i < 4; i++) shared[i] = -1;
	221	shared[0] = 0;
	222	if (!p) return shared;
	223	for (i = 0; i < 3; i++) {
	224	if (HasID(p->fLabel[i])) shared[i + 1] = p->fLabel[i];
	225	shared[0]++;
	226	}
	227	return shared;
	228	}
	229	//
	230	//
	231	//
	232	void AliITSNeuralPoint::ConfMap(Double_t vx, Double_t vy)
	233	{
853a0f19	234	// Performs conformal mapping vertex-constrained
853a0f19	235
b9d722bc	236	Double_t dx = fX - vx;
	237	Double_t dy = vy - fY;
	238	Double_t r2 = dxdx + dydy;
	239	fConfX = dx / r2;
	240	fConfY = dy / r2;
	241	}