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// $Id: ApproxEqual.hh,v 1.4 2006/06/29 18:37:15 gunter Exp $
// GEANT4 tag $Name: geant4-09-04-ref-00 $
//

// ApproxEqual Functions for geometry test programs
//
// History:
// 20.07.95 P.Kent Translated from old code

#ifndef APPROXEQUAL_HH
#define APPROXEQUAL_HH

#include "globals.hh"
#include "geomdefs.hh"

#include "G4ThreeVector.hh"
#include "G4AffineTransform.hh"
#include "G4Navigator.hh"

const G4double kApproxEqualTolerance = 1E-9;

// Derived navigator class

class MyNavigator : public G4Navigator
{
  public:
  
    MyNavigator() : G4Navigator() {}
    ~MyNavigator(){}

    G4ThreeVector CurrentLocalCoordinate() const
    {
      return GetCurrentLocalCoordinate();
    }
    G4ThreeVector GetNetTranslation() const
    {
      return NetTranslation();
    }
    G4RotationMatrix GetNetRotation() const
    {
      return NetRotation();
    }
};

// Return true if the double check is approximately equal to target
//
// Process:
//
// Return true is check if less than kApproxEqualTolerance from target

G4bool ApproxEqual(const G4double check,const G4double target)
{
    return (std::fabs(check-target)<kApproxEqualTolerance) ?true:false;
}

// Return true if the 3vector check is approximately equal to target
G4bool ApproxEqual(const G4ThreeVector& check, const G4ThreeVector& target)
{
    return (ApproxEqual(check.x(),target.x())&&
	   ApproxEqual(check.y(),target.y())&&
	    ApproxEqual(check.z(),target.z())) ? true : false;
}


G4bool ApproxEqual(const G4AffineTransform &tf1,
		   const G4AffineTransform &tf2)
{
	for (G4int i=0;i<15;i++)
		{
		if (!ApproxEqual(tf1[i],tf2[i])) return false;
		}
	return true;
}

#endif
