// Created on: 1994-03-03
// Created by: Yves FRICAUD
// Copyright (c) 1994-1999 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.

#include <Bisector.hxx>
#include <Geom2d_Curve.hxx>
#include <gp_Pnt2d.hxx>
#include <gp_Vec2d.hxx>

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

bool Bisector::IsConvex(const occ::handle<Geom2d_Curve>& Cu, const double Sign)
{

  double   U1 = (Cu->LastParameter() + Cu->FirstParameter()) / 2.;
  gp_Pnt2d P1;
  gp_Vec2d V1, V2;
  Cu->D2(U1, P1, V1, V2);
  double Tol = 1.e-5;
  if (Sign * (V1 ^ V2) < Tol)
    return true; // <= 0.
  else
    return false;
}
