// This code implementation is the intellectual property of
// the GEANT4 collaboration.
//
// By copying, distributing or modifying the Program (or any work
// based on the Program) you indicate your acceptance of this statement,
// and all its terms.
//
// $Id: G4Axis2Placement3D.icc,v 1.4 2000/11/08 14:21:58 gcosmo Exp $
// GEANT4 tag $Name: geant4-03-01 $
//
// --------------------------------------------------------------------
// GEANT 4 inline definitions file
//
// G4AxisPlacement3D.icc
//
// Implementation of inline methods of G4AxisPlacement3D
// --------------------------------------------------------------------

inline
G4bool G4Axis2Placement3D::operator==(const G4Axis2Placement3D& other) const
{
  return ((location == other.location) && (axis == other.axis) &&
	  (refDirection == other.refDirection) &&
	  (pX == other.pX) && (pY == other.pY) && (pZ == other.pZ) &&
	  (toPlacementCoordinates == other.toPlacementCoordinates) &&
	  (fromPlacementCoordinates == other.fromPlacementCoordinates))
	 ? true : false; 
}

inline
void G4Axis2Placement3D::Init( const G4Vector3D& refDirection0 ,
			       const G4Vector3D& axis0         ,
			       const G4Point3D& location0       ) 
{
  refDirection = refDirection0;
  axis         = axis0;
  location     = location0;
  
  // get the axes of the placement coordinate system
  // (p[] of the STEP standard)
  pZ = axis.unit();
  pX = (refDirection-(refDirection*pZ)*pZ).unit();
  pY = pZ.cross(pX); // normalized
  
  // basis transformation
  fromPlacementCoordinates= HepTranslate3D(location)
    * G4Transform3D(HepXHat, HepYHat, HepZHat,
		     pX, pY, pZ);

  toPlacementCoordinates= fromPlacementCoordinates.inverse();
}


inline
G4Axis2Placement3D::G4Axis2Placement3D(const G4Vector3D& refDirection0,
				       const G4Vector3D& axis0        ,
				       const G4Point3D& location0      )
{
  Init( refDirection0, axis0, location0);
}


inline
G4Point3D G4Axis2Placement3D::GetLocation() const
{
  return location;
}

inline
G4Vector3D G4Axis2Placement3D::GetAxis() const
{
  return axis;
}

inline
G4Vector3D G4Axis2Placement3D::GetRefDirection() const 
{
  return refDirection;
}

/////////////////////////////////////////////////////////////////////////////

inline
const G4Transform3D& G4Axis2Placement3D::GetToPlacementCoordinates() const 
{
  return toPlacementCoordinates;
}

inline
const G4Transform3D& G4Axis2Placement3D::GetFromPlacementCoordinates() const 
{
  return fromPlacementCoordinates;
}

inline
G4Vector3D G4Axis2Placement3D::GetPX() const
{
  return pX;
}

inline
G4Vector3D G4Axis2Placement3D::GetPY() const
{
  return pY;
}

inline
G4Vector3D G4Axis2Placement3D::GetPZ() const
{
  return pZ;
}