//--------------------------------------------------------------------------
// File and Version Information:
//
// Description:
//	Class PndEmcClusterDistances.
//
// Environment:
//	Software developed for the BaBar Detector at the SLAC B-Factory.
//
// Author List:
//	Phil Strother   	Originator
//
// Copyright Information:
//	Copyright (C) 1998	University of Edinburgh
//
// Dima Melnichuk, adaption for pandaroot
//------------------------------------------------------------------------
#pragma once
#ifndef PNDEMCCLUSTERDISTANCES_H
#define PNDEMCCLUSTERDISTANCES_H

#include "PndEmcAbsClusterProperty.h"
#include "TObject.h"

class TVector3;
class PndEmcXtal;
class PndEmcDigi;

class PndEmcClusterDistances: public PndEmcAbsClusterProperty
{

public:

  // Constructors
  PndEmcClusterDistances(const PndEmcCluster &cluster, const TClonesArray *digiArray);
  PndEmcClusterDistances( const PndEmcClusterDistances &);

  // Destructor
  virtual ~PndEmcClusterDistances();

  Double_t RadialDistance(const PndEmcDigi * const) const;
  // This is the radial distance (in cm) of the digi from the cluster
  // centroid in a plane containing the estimated shower max (assumed EM) 
  // whose normal points back to the IP.

  Double_t AngularDistance(const PndEmcDigi * const) const;
  // Just sqrt( dTheta**2 + dPhi**2).  In mr.

  Double_t AngularSeparation(const PndEmcDigi * const) const;

  // The angle between the cluster centroid and the digi in question, in mr.


private:

	// Data members
	TVector3 *fShowerMaxLocation;
	TVector3 *fClusterLocation;
	PndEmcXtal *fTheGeom;
	TVector3 *fTheNormalToFrontFace;
	Double_t fDistanceOfPlane;
	Double_t fClusPhi;
	Double_t fClusTheta;

	ClassDef(PndEmcClusterDistances,1)
};

#endif // PNDEMCCLUSTERDISTANCES_HH