// File:      Poly_CoherentLink.cxx
// Created:   03.01.08 09:27
// Author:    Alexander GRIGORIEV
// Copyright: Open Cascade 2008


#include <Poly_CoherentLink.hxx>
#include <Poly_CoherentTriangle.hxx>
#include <Standard_ProgramError.hxx>

//=======================================================================
//function : Poly_CoherentLink()
//purpose  : Empty Constructor
//=======================================================================

Poly_CoherentLink::Poly_CoherentLink ()
  : myAttribute (0L)
{
  myNode[0] = -1;
  myNode[1] = -1;
  myOppositeNode[0] = -1;
  myOppositeNode[1] = -1;
}

//=======================================================================
//function : Poly_CoherentLink()
//purpose  : Constructor
//=======================================================================

Poly_CoherentLink::Poly_CoherentLink (const Poly_CoherentTriangle& theTri,
                                      Standard_Integer             iSide)
  : myAttribute (0L)
{
  static const Standard_Integer ind[] = { 1, 2, 0, 1 };
  Standard_ProgramError_Raise_if(iSide < 0 || iSide > 2,
                                 "Poly_CoherentLink::Poly_CoherentLink: "
                                 "Wrong iSide parameter");
  const Standard_Integer aNodeInd[2] = {
    theTri.Node(ind[iSide+0]),
    theTri.Node(ind[iSide+1])
  };
  if (aNodeInd[0] < aNodeInd[1]) {
    myNode[0] = aNodeInd[0];
    myNode[1] = aNodeInd[1];
    myOppositeNode[0] = theTri.Node(iSide);
    myOppositeNode[1] = theTri.GetConnectedNode(iSide);
  } else {
    myNode[0] = aNodeInd[1];
    myNode[1] = aNodeInd[0];
    myOppositeNode[0] = theTri.GetConnectedNode(iSide);
    myOppositeNode[1] = theTri.Node(iSide);
  }
}