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//
// $Id: G4VFacet.cc,v 1.8 2008/12/18 12:57:38 gunter Exp $
// GEANT4 tag $Name: geant4-09-03 $
//
// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
//
// MODULE:              G4VFacet.hh
//
// Date:                15/06/2005
// Author:              P R Truscott
// Organisation:        QinetiQ Ltd, UK
// Customer:            UK Ministry of Defence : RAO CRP TD Electronic Systems
// Contract:            C/MAT/N03517
//
// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
//
// CHANGE HISTORY
// --------------
//
// 31 October 2004, P R Truscott, QinetiQ Ltd, UK - Created.
//
// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

#include "G4VFacet.hh"
#include "globals.hh"
#include "G4GeometryTolerance.hh"

///////////////////////////////////////////////////////////////////////////////
//
G4VFacet::G4VFacet ()
{
  dirTolerance = 1.0E-14;
  kCarTolerance = G4GeometryTolerance::GetInstance()->GetSurfaceTolerance();

  P.clear();
  E.clear();
    
  circumcentre = G4ThreeVector(0.0,0.0,0.0);
  radius    = 0.0;
  radiusSqr = 0.0;
  area      = 0.0;
}

///////////////////////////////////////////////////////////////////////////////
//
G4VFacet::~G4VFacet ()
{
  P.clear();
  E.clear();
}

///////////////////////////////////////////////////////////////////////////////
//
G4bool G4VFacet::operator== (const G4VFacet &right) const
{
  G4double tolerance = kCarTolerance*kCarTolerance/4.0;
  if (nVertices != right.GetNumberOfVertices())
    { return false; }
  else if ((circumcentre-right.GetCircumcentre()).mag2() > tolerance)
    { return false; }
  else if (std::fabs((right.GetSurfaceNormal()).dot(surfaceNormal)) < 0.9999999999)
    { return false; }

  G4bool coincident  = true;
  size_t i           = 0;
  do
  {
    coincident = false;
    size_t j   = 0;
    do
    {
      coincident = (GetVertex(i)-right.GetVertex(j)).mag2() < tolerance;
    } while (!coincident && ++j < nVertices);
  } while (coincident && ++i < nVertices);
  
  return coincident;
}

///////////////////////////////////////////////////////////////////////////////
//
void G4VFacet::ApplyTranslation(const G4ThreeVector v)
{
  P0 += v;
  for (G4ThreeVectorList::iterator it=P.begin(); it!=P.end(); it++)
  {
    (*it) += v;
  }
}

///////////////////////////////////////////////////////////////////////////////
//
std::ostream &G4VFacet::StreamInfo(std::ostream &os) const
{
  os << G4endl;
  os << "*********************************************************************"
     << G4endl;
  os << "FACET TYPE       = " << geometryType << G4endl;
  os << "ABSOLUTE VECTORS = " << G4endl;
  os << "P0               = " << P0 << G4endl;
  for (G4ThreeVectorList::const_iterator it=P.begin(); it!=P.end(); it++)
    { os << "P[" << it-P.begin()+1 << "]      = " << *it << G4endl; }

  os << "RELATIVE VECTORS = " << G4endl;
  for (G4ThreeVectorList::const_iterator it=E.begin(); it!=E.end(); it++)
    { os << "E[" << it-E.begin()+1 << "]      = " << *it << G4endl; }

  os << "*********************************************************************"
     << G4endl;
  
  return os;
}

///////////////////////////////////////////////////////////////////////////////
//
G4VFacet* G4VFacet::GetClone ()
  {return 0;}

///////////////////////////////////////////////////////////////////////////////
//
G4double G4VFacet::Distance (const G4ThreeVector&, const G4double)
  {return kInfinity;}

///////////////////////////////////////////////////////////////////////////////
//
G4double G4VFacet::Distance (const G4ThreeVector&, const G4double,
                                    const G4bool)
  {return kInfinity;}

///////////////////////////////////////////////////////////////////////////////
//
G4double G4VFacet::Extent (const G4ThreeVector)
  {return 0.0;}

///////////////////////////////////////////////////////////////////////////////
//
G4bool G4VFacet::Intersect (const G4ThreeVector&, const G4ThreeVector &,
                            const G4bool , G4double &, G4double &,
                                  G4ThreeVector &)
  {return false;}