// Created on: 1991-10-04
// Created by: Remi GILET
// Copyright (c) 1991-1999 Matra Datavision
// Copyright (c) 1999-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

//=========================================================================
//   CREATION of the BISSECTRICE between a DROITE and POINTS.             +
//=========================================================================

#include <GccAna_LinPnt2dBisec.hxx>
#include <GccInt_BLine.hxx>
#include <GccInt_BParab.hxx>
#include <gp_Ax2d.hxx>
#include <gp_Dir2d.hxx>
#include <gp_Lin2d.hxx>
#include <gp_Pnt2d.hxx>
#include <gp_XY.hxx>
#include <StdFail_NotDone.hxx>

//=========================================================================
GccAna_LinPnt2dBisec::GccAna_LinPnt2dBisec(const gp_Lin2d& Line1, const gp_Pnt2d& Point2)
{

  WellDone = Standard_False;

  Standard_Real xdir = Line1.Direction().X();
  Standard_Real ydir = Line1.Direction().Y();
  Standard_Real xloc = Line1.Location().X();
  Standard_Real yloc = Line1.Location().Y();
  Standard_Real dist = Line1.Distance(Point2);
  //   if ( dist > gp::Resolution()) {
  if (dist > 1.e-10)
  {
    Standard_Real xpoint2 = Point2.X();
    Standard_Real ypoint2 = Point2.Y();
    if ((-ydir * (xpoint2 - xloc) + xdir * (ypoint2 - yloc)) > 0.0)
    {
      gp_Ax2d    axeparab(gp_Pnt2d(Point2.XY() - dist / 2. * gp_XY(-ydir, xdir)),
                       gp_Dir2d(-ydir, xdir));
      gp_Parab2d bislinpnt(axeparab, dist / 2.0);
      bissol = new GccInt_BParab(bislinpnt);
      //         =====================================
    }
    else
    {
      gp_Ax2d    axeparab(gp_Pnt2d(Point2.XY() + dist / 2. * gp_XY(-ydir, xdir)),
                       gp_Dir2d(ydir, -xdir));
      gp_Parab2d bislinpnt(axeparab, dist / 2.0);
      bissol = new GccInt_BParab(bislinpnt);
      //         =====================================
    }
    WellDone = Standard_True;
  }
  else
  {
    gp_Lin2d bislinpnt(Point2, gp_Dir2d(-ydir, xdir));
    bissol = new GccInt_BLine(bislinpnt);
    //     ====================================
    WellDone = Standard_True;
  }
}

//=========================================================================

Standard_Boolean GccAna_LinPnt2dBisec::IsDone() const
{
  return WellDone;
}

Handle(GccInt_Bisec) GccAna_LinPnt2dBisec::ThisSolution() const
{
  if (!WellDone)
    throw StdFail_NotDone();

  return bissol;
}