/**************************************************************************
 * 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 1.2  1999/09/29 09:24:28  fca
Introduction of the Copyright and cvs Log

*/

///////////////////////////////////////////////////////////////////////////
// Class AliSignal
// Handling of ALICE (extrapolated) signals.
//
// Note :
// ------
// Signal positions (r) and reference frames (f) are specified via
// SetPosition(r,f) under the following conventions :
//
// f="car" ==> r is Cartesian   (x,y,z)
// f="sph" ==> r is Spherical   (r,theta,phi)
// f="cyl" ==> r is Cylindrical (rho,phi,z)
//
// The same holds for SetPositionErrors().
//
// All angles are in radians.
//
// Example :
// ---------
//
// AliSignal s;
// Float_t pos[3]={-1,25,7};
// Float_t err[3]={0.03,0.7,0.18};
// Float_t signal=120.8;
// Float_t error=1.73;
// s.SetPosition(pos,"car");
// s.SetPositionErrors(err,"car");
// s.SetSignal(signal);
// s.SetSignalError(error);
// Float_t loc[3],dr[3],sigma;
// s.GetPosition(loc,"sph");
// s.GetPositionErrors(dr,"sph");
// Float_t adc=s.GetSignal();
// Float_t sigma=s.GetSignalError();
//
// AliSignal q(3); // q can store 3 signal values with their errors
//                 // In the example below a signal contains the
//                 // following data : timing, ADC and dE/dx
// q.SetPosition(pos,"car");
// q.SetPositionErrors(err,"car");
// signal=82.5; // e.q. signal time in ns
// error=2.01;
// q.SetSignal(signal,1);
// q.SetSignalError(error,1);
// signal=268.1; // e.g. ADC value of signal
// error=3.75;
// q.SetSignal(signal,2);
// q.SetSignalError(error,2);
// signal=23.7; // e.g. corresponding dE/dx value
// error=0.48;
// q.SetSignal(signal,3);
// q.SetSignalError(error,3);
//
//--- Author: Nick van Eijndhoven 23-jan-1999 UU-SAP Utrecht
//- Modified: NvE 30-oct-1999 UU-SAP Utrecht
///////////////////////////////////////////////////////////////////////////

#include "AliSignal.h"
 
ClassImp(AliSignal) // Class implementation to enable ROOT I/O
 
AliSignal::AliSignal(Int_t n)
{
// Creation of an AliSignal object and initialisation of parameters.
// A total of n (default n=1) values (with errors) can be stored.
 fNvalues=n;
 fSignal=0;
 fDsignal=0;
}
///////////////////////////////////////////////////////////////////////////
AliSignal::~AliSignal()
{
// Destructor to delete dynamically allocated memory
 if (fSignal)
 {
  delete fSignal;
  fSignal=0;
 }
 if (fDsignal)
 {
  delete fDsignal;
  fDsignal=0;
 }
}
///////////////////////////////////////////////////////////////////////////
void AliSignal::Reset()
{
// Reset all signal and position values and errors to 0.
// The data arrays are also created if not already existing.

 if (!fSignal) fSignal=new TArrayF(fNvalues);
 if (!fDsignal) fDsignal=new TArrayF(fNvalues);

 Double_t r[3]={0,0,0};
 SetPosition(r,"sph");
 SetErrors(r,"car");
 for (Int_t i=0; i<fSignal->GetSize(); i++)
 {
  fSignal->AddAt(0,i);
  fDsignal->AddAt(0,i);
 }
}
///////////////////////////////////////////////////////////////////////////
void AliSignal::ResetSignals()
{
// Reset all signal values and errors to 0.
// The data arrays are also created if not already existing.

 if (!fSignal) fSignal=new TArrayF(fNvalues);
 if (!fDsignal) fDsignal=new TArrayF(fNvalues);

 for (Int_t i=0; i<fSignal->GetSize(); i++)
 {
  fSignal->AddAt(0,i);
  fDsignal->AddAt(0,i);
 }
}
///////////////////////////////////////////////////////////////////////////
void AliSignal::ResetPosition()
{
// Reset position and errors to 0.
 Double_t r[3]={0,0,0};
 SetPosition(r,"sph");
 SetErrors(r,"car");
}
///////////////////////////////////////////////////////////////////////////
void AliSignal::SetSignal(Double_t sig,Int_t j)
{
// Store j-th (default j=1) signal value.
// Note : The first signal value is at j=1.

 if (!fSignal) ResetSignals();

 Int_t size=fSignal->GetSize();
 if (j<=size)
 {
  fSignal->AddAt(float(sig),j-1);
 }
 else
 {
  cout << "*AliSignal::SetSignal* Index mismatch j : " << j
       << " size : " << size << endl;
 }
}
///////////////////////////////////////////////////////////////////////////
void AliSignal::AddSignal(Double_t sig,Int_t j)
{
// Add value to j-th (default j=1) signal value.
// Note : The first signal value is at j=1.

 if (!fSignal) ResetSignals();

 Int_t size=fSignal->GetSize();
 if (j<=size)
 {
  Float_t sum=(fSignal->At(j-1))+sig;
  fSignal->AddAt(sum,j-1);
 }
 else
 {
  cout << "*AliSignal::AddSignal* Index mismatch j : " << j
       << " size : " << size << endl;
 }
}
///////////////////////////////////////////////////////////////////////////
Float_t AliSignal::GetSignal(Int_t j)
{
// Provide j-th (default j=1) signal value.
// Note : The first signal value is at j=1.
 if (fSignal)
 {
  return fSignal->At(j-1);
 }
 else
 {
  return 0;
 }
}
///////////////////////////////////////////////////////////////////////////
void AliSignal::SetSignalError(Double_t dsig,Int_t j)
{
// Store error on j-th (default j=1) signal value.
// Note : The error on the first signal value is at j=1.

 if (!fDsignal) ResetSignals();

 Int_t size=fDsignal->GetSize();
 if (j<=size)
 {
  fDsignal->AddAt(float(dsig),j-1);
 }
 else
 {
  cout << "*AliSignal::SetSignalError* Index mismatch j : " << j
       << " size : " << size << endl;
 }
}
///////////////////////////////////////////////////////////////////////////
Float_t AliSignal::GetSignalError(Int_t j)
{
// Provide error on the j-th (default j=1) signal value.
// Note : The error on the first signal value is at j=1.
 if (fDsignal)
 {
  return fDsignal->At(j-1);
 }
 else
 {
  return 0;
 }
}
///////////////////////////////////////////////////////////////////////////
void AliSignal::Info(TString f)
{
// Provide signal information within the coordinate frame f
 cout << " *AliSignal::Info* " << endl;
 cout << " Position";
 Ali3Vector::Info(f); 
 
 if (fSignal && fDsignal)
 {
  for (Int_t i=0; i<fSignal->GetSize(); i++)
  {
   cout << "   Signal value : " << fSignal->At(i)
        << " error : " << fDsignal->At(i) << endl;
  }
 }
} 
///////////////////////////////////////////////////////////////////////////