Reconstruction/MdcPatRec/MdcRecoUtil/include/MdcRecoUtil/DifPoint.h

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//--------------------------------------------------------------------------
// File and Version Information:
//  $Id: DifPoint.h,v 1.2 2009/12/23 02:59:56 zhangy Exp $
//
// Description:
//  Class Header for |DifPoint|
//      What i do ?
//
// Environment:
//  Software developed for the BaBar Detector at the SLAC B-Factory.
//
// Author List:
//  A. Snyder
//
// Copyright Information:
//  Copyright (C) 1996  SLAC
//
// History:
//  Migration for BESIII MDC
//
//------------------------------------------------------------------------
 
#ifndef DifPoint_H
#define DifPoint_H
 
#include "CLHEP/Geometry/Point3D.h"
#include "MdcRecoUtil/DifVector.h"
#include <assert.h>
#ifndef ENABLE_BACKWARDS_COMPATIBILITY
typedef HepGeom::Point3D<double> HepPoint3D;
#endif
 
class DifPoint : public DifVector {
 
public:
  DifPoint( const DifPoint& p ) : DifVector( p ) {}
  DifPoint() : DifVector() {}
  DifPoint( const HepPoint3D& p );
 
  DifPoint( const DifNumber& X, const DifNumber& Y, const DifNumber& Z )
      : DifVector( X, Y, Z ) {}
  DifPoint( double X, double Y, double Z ) : DifVector( X, Y, Z ) {}
 
  // operators - sensible only
  inline DifPoint& operator=( const DifPoint& p );
  inline DifPoint& operator+=( const DifVector& v );
  inline DifPoint& operator-=( const DifVector& v );
  inline DifPoint& operator*=( const DifNumber& n );
  inline DifPoint& operator/=( const DifNumber& n );
 
  // binary operators
 
  inline friend DifPoint  operator+( const DifPoint& p, const DifVector& v );
  inline friend DifPoint  operator+( const DifVector& v, const DifPoint& p );
  inline friend DifPoint  operator-( const DifPoint& p, const DifVector& v );
  inline friend DifVector operator-( const DifPoint& a, const DifPoint& b );
 
  // change of scale is ok (e.g. m->cm)
  inline friend DifPoint operator*( const DifPoint& p, const DifNumber& n );
  inline friend DifPoint operator*( const DifNumber& n, const DifPoint& p );
  inline friend DifPoint operator/( const DifPoint& v, const DifNumber& n );
 
private:
  // disable senseless operations
  DifPoint& operator=( const DifVector& v );
  DifPoint& operator+=( const DifPoint& p );
  DifPoint& operator-=( const DifPoint& p );
 
public:
  // bes interface routines
  HepPoint3D hepPoint() const;
};
 
#include "MdcRecoUtil/DifPoint.icc"
 
#endif