[u/mrichter/AliRoot.git] / HLT / src / AliL3ConfMapPoint.cxx

// Author: Anders Vestbo <mailto:vestbo$fi.uib.no>
//*-- Copyright &copy ASV

#include <iostream.h>
#include <math.h>
#include "AliL3Logging.h"

#include "AliL3ConfMapPoint.h"
#include "AliL3SpacePointData.h"
#include "AliL3Vertex.h"
#include "AliL3ConfMapTrack.h"

//_____________________________________________________________
// AliL3ConfMapPoint
//
// Hit class for conformal mapper

ClassImp(AliL3ConfMapPoint)

AliL3ConfMapPoint::AliL3ConfMapPoint()
{
  //Constructor
  
  SetUsage(false);
  SetHitNumber(-1);
  SetX(0);
  SetY(0);
  SetZ(0);
  SetXerr(0);
  SetYerr(0);
  SetZerr(0);

  SetPhi(0.);
  SetEta(0.);
  
  SetXprime(0.);
  SetYprime(0.);
  SetXprimeerr(0.);
  SetYprimeerr(0.);
  SetIntPoint(0., 0., 0., 0., 0., 0.);
  SetShiftedCoord();
  SetMCTrackID(0,0,0);
}

AliL3ConfMapPoint::~AliL3ConfMapPoint()
{
  // Destructor.
  // Does nothing except destruct. 
}

Bool_t AliL3ConfMapPoint::ReadHits(AliL3SpacePointData* hits ){
  
  SetHitNumber(hits->fID);
  SetPadRow(hits->fPadRow);
  Int_t slice = (hits->fID>>25) & 0x7f;
  SetSector(slice);
  SetX(hits->fX);
  SetY(hits->fY);
  SetZ(hits->fZ);
  SetXerr(sqrt(hits->fXYErr));
  SetYerr(sqrt(hits->fXYErr));
  SetZerr(sqrt(hits->fZErr));
  return kTRUE;
}

void AliL3ConfMapPoint::Reset()
{
  //Reset this point.
  SetUsage(kFALSE);
  SetS(0);
  nextRowHit = 0;
  nextVolumeHit=0;
  nextTrackHit=0;
}

void AliL3ConfMapPoint::Setup(AliL3Vertex *vertex)
{
  //Setup. Sets the vertex, conformal coordinates, and phi and eta of each hit.
  
  SetIntPoint(vertex->GetX(),    vertex->GetY(),    vertex->GetZ(),
              vertex->GetXErr(), vertex->GetYErr(), vertex->GetZErr());
  SetShiftedCoord();
  SetConfCoord();
  // The angles are set properly if they are set after the interaction point and the shifted coordinates
  SetAngles();
  //SetDist(0., 0.);
  
  return;
}

void AliL3ConfMapPoint::SetIntPoint(const Double_t in_x,const Double_t in_y, 
			       const Double_t in_z,
			       const Double_t in_x_err, const Double_t in_y_err, 
			       const Double_t in_z_err)
{
  // Defines a new interaction point. This point is needed to calculate
  // the conformal coordinates.

  SetXt(in_x);
  SetYt(in_y);
  SetZt(in_z);
  SetXterr(in_x_err);
  SetYterr(in_y_err);
  SetZterr(in_z_err);

  return;
}

void AliL3ConfMapPoint::SetAllCoord(const AliL3ConfMapPoint *preceding_hit)
{
  // Sets the interaction point, the shifted coordinates, and the conformal mapping coordinates.
  // These values are calculated from the interaction point of the given cluster which should be a
  // already found cluster on the same track.

  if (this == preceding_hit) {
    SetIntPoint(preceding_hit->GetX(),    preceding_hit->GetY(),    preceding_hit->GetZ(),
                preceding_hit->GetXerr(), preceding_hit->GetYerr(), preceding_hit->GetZerr());
  }

  else {
    SetIntPoint(preceding_hit->GetXt(),    preceding_hit->GetYt(),    preceding_hit->GetZt(),
                preceding_hit->GetXterr(), preceding_hit->GetYterr(), preceding_hit->GetZterr());
  }

  SetShiftedCoord();
  SetConfCoord();

  return;
}

void AliL3ConfMapPoint::SetShiftedCoord()
{
  // Sets the coordinates with resepct to the given vertex point

  SetXv(GetX() - fXt);
  SetYv(GetY() - fYt);
  SetZv(GetZ() - fZt);
  /*
  SetXverr(TMath::Sqrt(GetXerr()*GetXerr() + fXterr*fXterr));
  SetYverr(TMath::Sqrt(GetYerr()*GetYerr() + fYterr*fYterr));
  SetZverr(TMath::Sqrt(GetZerr()*GetZerr() + fZterr*fZterr));
  */
  return;
}

void AliL3ConfMapPoint::SetConfCoord()
{
  // Calculates the conformal coordinates of one cluster.
  // If the option "vertex_constraint" applies the interaction point is
  // assumed to be at (0, 0, 0). Otherwise the function will use the
  // interaction point specified by fXt and fYt.

  Double_t r2;
  Double_t xyErrorScale = 1;
  Double_t szErrorScale = 1;

  if ((r2 = fXv*fXv + fYv*fYv)) 
    {
      fXprime =  fXv / r2;
      fYprime = -fYv / r2;
      //  fXprimeerr = TMath::Sqrt(TMath::Power((-fXv * fXv +   fYv*fYv) * fXverr, 2) + TMath::Power( 2*fXv*fYv*fYverr, 2)) / TMath::Power(fXv*fXv + fYv*fYv, 2);
      // fXprimeerr = TMath::Sqrt(TMath::Power((-fXv * fXv - 3*fYv*fYv) * fYverr, 2) + TMath::Power(-2*fXv*fYv*fXverr, 2)) / TMath::Power(fXv*fXv + fYv*fYv, 2);
    
      
      //set weights:
      //fWxy = r2*r2 / (TMath::Power(xyErrorScale,2)*(TMath::Power(xerr,2)+TMath::Power(yerr,2)));
      fWxy = r2*r2 / ((xyErrorScale*xyErrorScale)*((xerr*xerr)+(yerr*yerr)));
      s = 0; //track trajectory
      //fWz = (Double_t)(1./TMath::Power(szErrorScale*zerr,2));
      fWz = (Double_t)(1./(szErrorScale*zerr*zerr));
    }
  
  else {
    fXprime    = 0.;
    fYprime    = 0.;
    fXprimeerr = 0.;
    fYprimeerr = 0.;
    fWxy = 0;
    fWz = 0;
    s = 0;
  }

  return;
}

void AliL3ConfMapPoint::SetAngles()
{
  // Calculates the angle phi and the pseudorapidity eta for each cluster.
  /*
  Double_t r = TMath::Sqrt(x*x + y*y);

  fPhi = TMath::ATan2(y,x);
  if(fPhi<0) fPhi = fPhi + 2*TMath::Pi();
  fEta = 3.*z/(TMath::Abs(z)+2.*r);
  return;
  */
  //  Double_t r3dim = TMath::Sqrt(fXv*fXv + fYv*fYv + fZv*fZv);
  Double_t r3dim = sqrt(fXv*fXv + fYv*fYv + fZv*fZv);
  //Double_t r2dim = TMath::Sqrt(fXv*fXv + fYv*fYv);

  /*if (r2dim == 0.) {
  // If r2dim == 0 the pseudorapidity eta cannot be calculated (division by zero)!
  // This can only happen if the point is lying on the z-axis and this should never be possible.
    cerr << "The pseudorapidity eta cannot be calculated (division by zero)! Set to 1.e-10." << endl;
    r2dim = 1.e-10;
  }

  if (fXv == 0.) {
    fPhi = (fYv > 0.) ? TMath::Pi() / 2. : - TMath::Pi() / 2.;
  }

  else {
    fPhi = (fXv > 0.) ? TMath::ASin(fYv/r2dim) : TMath::Pi() - TMath::ASin(fYv/r2dim);
  }

  if (fPhi < 0.) {
    fPhi += 2. * TMath::Pi();
  }
  */
  //fPhi = TMath::ATan2(y,x);
  fPhi = atan2(y,x);
  //if(fPhi<0) fPhi = fPhi + 2*TMath::Pi();
  
  //fEta = 0.5 * TMath::Log((r3dim + fZv)/(r3dim - fZv));
  fEta = 0.5 * log((r3dim + fZv)/(r3dim - fZv));
  return;
}
/*
AliL3ConfMapTrack *AliL3ConfMapPoint::GetTrack(TClonesArray *tracks) const
{
  // Returns the pointer to the track to which this hit belongs.
  
  return (AliL3ConfMapTrack*)tracks->At(this->GetTrackNumber());
}
*/
Commit	Line	Data
b661165c	1	// Author: Anders Vestbo <mailto:vestbo$fi.uib.no>
b661165c	2	//*-- Copyright &copy ASV
108615fc	3
	4	#include <iostream.h>
	5	#include <math.h>
	6	#include "AliL3Logging.h"
	7
	8	#include "AliL3ConfMapPoint.h"
	9	#include "AliL3SpacePointData.h"
	10	#include "AliL3Vertex.h"
	11	#include "AliL3ConfMapTrack.h"
	12
b661165c	13	//_____________________________________________________________
	14	// AliL3ConfMapPoint
	15	//
	16	// Hit class for conformal mapper
	17
	18	ClassImp(AliL3ConfMapPoint)
108615fc	19
	20	AliL3ConfMapPoint::AliL3ConfMapPoint()
	21	{
	22	//Constructor
	23
	24	SetUsage(false);
	25	SetHitNumber(-1);
	26	SetX(0);
	27	SetY(0);
	28	SetZ(0);
	29	SetXerr(0);
	30	SetYerr(0);
	31	SetZerr(0);
	32
	33	SetPhi(0.);
	34	SetEta(0.);
	35
	36	SetXprime(0.);
	37	SetYprime(0.);
	38	SetXprimeerr(0.);
	39	SetYprimeerr(0.);
	40	SetIntPoint(0., 0., 0., 0., 0., 0.);
	41	SetShiftedCoord();
5dd30052	42	SetMCTrackID(0,0,0);
108615fc	43	}
	44
	45	AliL3ConfMapPoint::~AliL3ConfMapPoint()
	46	{
	47	// Destructor.
	48	// Does nothing except destruct.
	49	}
	50
	51	Bool_t AliL3ConfMapPoint::ReadHits(AliL3SpacePointData* hits ){
355debe1	52
108615fc	53	SetHitNumber(hits->fID);
	54	SetPadRow(hits->fPadRow);
	55	Int_t slice = (hits->fID>>25) & 0x7f;
	56	SetSector(slice);
	57	SetX(hits->fX);
	58	SetY(hits->fY);
	59	SetZ(hits->fZ);
	60	SetXerr(sqrt(hits->fXYErr));
	61	SetYerr(sqrt(hits->fXYErr));
	62	SetZerr(sqrt(hits->fZErr));
	63	return kTRUE;
	64	}
	65
355debe1	66	void AliL3ConfMapPoint::Reset()
	67	{
	68	//Reset this point.
	69	SetUsage(kFALSE);
	70	SetS(0);
	71	nextRowHit = 0;
	72	nextVolumeHit=0;
	73	nextTrackHit=0;
	74	}
	75
108615fc	76	void AliL3ConfMapPoint::Setup(AliL3Vertex *vertex)
	77	{
	78	//Setup. Sets the vertex, conformal coordinates, and phi and eta of each hit.
	79
	80	SetIntPoint(vertex->GetX(), vertex->GetY(), vertex->GetZ(),
	81	vertex->GetXErr(), vertex->GetYErr(), vertex->GetZErr());
	82	SetShiftedCoord();
	83	SetConfCoord();
	84	// The angles are set properly if they are set after the interaction point and the shifted coordinates
	85	SetAngles();
	86	//SetDist(0., 0.);
	87
	88	return;
	89	}
	90
	91	void AliL3ConfMapPoint::SetIntPoint(const Double_t in_x,const Double_t in_y,
	92	const Double_t in_z,
	93	const Double_t in_x_err, const Double_t in_y_err,
	94	const Double_t in_z_err)
	95	{
	96	// Defines a new interaction point. This point is needed to calculate
	97	// the conformal coordinates.
	98
	99	SetXt(in_x);
	100	SetYt(in_y);
	101	SetZt(in_z);
	102	SetXterr(in_x_err);
	103	SetYterr(in_y_err);
	104	SetZterr(in_z_err);
	105
	106	return;
	107	}
	108
	109	void AliL3ConfMapPoint::SetAllCoord(const AliL3ConfMapPoint *preceding_hit)
	110	{
	111	// Sets the interaction point, the shifted coordinates, and the conformal mapping coordinates.
	112	// These values are calculated from the interaction point of the given cluster which should be a
	113	// already found cluster on the same track.
	114
	115	if (this == preceding_hit) {
	116	SetIntPoint(preceding_hit->GetX(), preceding_hit->GetY(), preceding_hit->GetZ(),
	117	preceding_hit->GetXerr(), preceding_hit->GetYerr(), preceding_hit->GetZerr());
	118	}
	119
	120	else {
	121	SetIntPoint(preceding_hit->GetXt(), preceding_hit->GetYt(), preceding_hit->GetZt(),
	122	preceding_hit->GetXterr(), preceding_hit->GetYterr(), preceding_hit->GetZterr());
	123	}
	124
	125	SetShiftedCoord();
	126	SetConfCoord();
	127
	128	return;
	129	}
	130
	131	void AliL3ConfMapPoint::SetShiftedCoord()
	132	{
	133	// Sets the coordinates with resepct to the given vertex point
	134
	135	SetXv(GetX() - fXt);
	136	SetYv(GetY() - fYt);
	137	SetZv(GetZ() - fZt);
	138	/*
	139	SetXverr(TMath::Sqrt(GetXerr()GetXerr() + fXterrfXterr));
140	SetYverr(TMath::Sqrt(GetYerr()GetYerr() + fYterrfYterr));
141	SetZverr(TMath::Sqrt(GetZerr()GetZerr() + fZterrfZterr));
142	*/
143	return;
144	}
145
146	void AliL3ConfMapPoint::SetConfCoord()
147	{
148	// Calculates the conformal coordinates of one cluster.
149	// If the option "vertex_constraint" applies the interaction point is
150	// assumed to be at (0, 0, 0). Otherwise the function will use the
151	// interaction point specified by fXt and fYt.
152
153	Double_t r2;
154	Double_t xyErrorScale = 1;
155	Double_t szErrorScale = 1;
156
157	if ((r2 = fXvfXv + fYvfYv))
158	{
159	fXprime = fXv / r2;
160	fYprime = -fYv / r2;
161	// fXprimeerr = TMath::Sqrt(TMath::Power((-fXv * fXv + fYvfYv) fXverr, 2) + TMath::Power( 2fXvfYvfYverr, 2)) / TMath::Power(fXvfXv + fYv*fYv, 2);
162	// fXprimeerr = TMath::Sqrt(TMath::Power((-fXv * fXv - 3fYvfYv) * fYverr, 2) + TMath::Power(-2fXvfYvfXverr, 2)) / TMath::Power(fXvfXv + fYv*fYv, 2);
163
164
165	//set weights:
166	//fWxy = r2r2 / (TMath::Power(xyErrorScale,2)(TMath::Power(xerr,2)+TMath::Power(yerr,2)));
167	fWxy = r2r2 / ((xyErrorScalexyErrorScale)((xerrxerr)+(yerr*yerr)));
168	s = 0; //track trajectory
169	//fWz = (Double_t)(1./TMath::Power(szErrorScale*zerr,2));
170	fWz = (Double_t)(1./(szErrorScalezerrzerr));
171	}
172
173	else {
174	fXprime = 0.;
175	fYprime = 0.;
176	fXprimeerr = 0.;
177	fYprimeerr = 0.;
178	fWxy = 0;
179	fWz = 0;
180	s = 0;
181	}
182
183	return;
184	}
185
186	void AliL3ConfMapPoint::SetAngles()
187	{
188	// Calculates the angle phi and the pseudorapidity eta for each cluster.
189	/*
190	Double_t r = TMath::Sqrt(xx + yy);
191
192	fPhi = TMath::ATan2(y,x);
193	if(fPhi<0) fPhi = fPhi + 2*TMath::Pi();
194	fEta = 3.z/(TMath::Abs(z)+2.r);
195	return;
196	*/
197	// Double_t r3dim = TMath::Sqrt(fXvfXv + fYvfYv + fZv*fZv);
198	Double_t r3dim = sqrt(fXvfXv + fYvfYv + fZv*fZv);
199	//Double_t r2dim = TMath::Sqrt(fXvfXv + fYvfYv);
200
201	/*if (r2dim == 0.) {
202	// If r2dim == 0 the pseudorapidity eta cannot be calculated (division by zero)!
203	// This can only happen if the point is lying on the z-axis and this should never be possible.
204	cerr << "The pseudorapidity eta cannot be calculated (division by zero)! Set to 1.e-10." << endl;
205	r2dim = 1.e-10;
206	}
207
208	if (fXv == 0.) {
209	fPhi = (fYv > 0.) ? TMath::Pi() / 2. : - TMath::Pi() / 2.;
210	}
211
212	else {
213	fPhi = (fXv > 0.) ? TMath::ASin(fYv/r2dim) : TMath::Pi() - TMath::ASin(fYv/r2dim);
214	}
215
216	if (fPhi < 0.) {
217	fPhi += 2. * TMath::Pi();
218	}
219	*/
220	//fPhi = TMath::ATan2(y,x);
221	fPhi = atan2(y,x);
222	//if(fPhi<0) fPhi = fPhi + 2*TMath::Pi();
223
224	//fEta = 0.5 * TMath::Log((r3dim + fZv)/(r3dim - fZv));
225	fEta = 0.5 * log((r3dim + fZv)/(r3dim - fZv));
226	return;
227	}
228	/*
229	AliL3ConfMapTrack AliL3ConfMapPoint::GetTrack(TClonesArray tracks) const
230	{
231	// Returns the pointer to the track to which this hit belongs.
232
233	return (AliL3ConfMapTrack*)tracks->At(this->GetTrackNumber());
234	}
235	*/