// Created on: 1992-10-21
// Created by: Laurent BUCHARD
// Copyright (c) 1992-1999 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.

#ifndef OCCT_DEBUG
#define No_Standard_RangeError
#define No_Standard_OutOfRange
#endif



#include <math_Vector.hxx>
#include <math_Matrix.hxx>

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


#define THECURVE1 (*((TheCurve *)thecurve1))
#define THECURVE2 (*((TheCurve *)thecurve2))

//======================================================================
IntCurve_DistBetweenPCurvesGen::IntCurve_DistBetweenPCurvesGen( const TheCurve& C1
							       ,const TheCurve& C2) {
  thecurve1 = (Standard_Address) (&C1); 
  thecurve2 = (Standard_Address )(&C2);
}
//======================================================================
Standard_Integer IntCurve_DistBetweenPCurvesGen::NbVariables(void) const {
  return(2);
}
//======================================================================
Standard_Integer IntCurve_DistBetweenPCurvesGen::NbEquations(void) const {
  return(2);
}
//======================================================================
Standard_Boolean IntCurve_DistBetweenPCurvesGen::Value
  (const math_Vector& X
   ,math_Vector& F)  
{
  gp_Pnt2d P1,P2;
  TheCurveTool::D0(THECURVE1,X(1),P1);
  TheCurveTool::D0(THECURVE2,X(2),P2);
  F(1) = P1.X() - P2.X();
  F(2) = P1.Y() - P2.Y();
  return(Standard_True);
}
//======================================================================
Standard_Boolean IntCurve_DistBetweenPCurvesGen::Derivatives
  (const math_Vector& X
   ,math_Matrix& D) 
{
  gp_Vec2d T;
  gp_Pnt2d P;
  TheCurveTool::D1(THECURVE1,X(1),P,T);
  D.Value(1,1) = T.X();
  D.Value(2,1) = T.Y();
 
  TheCurveTool::D1(THECURVE2,X(2),P,T);
  D.Value(1,2) = -(T.X());
  D.Value(2,2) = -(T.Y());

return(Standard_True);
}
//======================================================================
Standard_Boolean IntCurve_DistBetweenPCurvesGen::Values
  (const math_Vector& X
   ,math_Vector& F
   ,math_Matrix& D) 
{

  gp_Vec2d T;
  gp_Pnt2d P1,P2;
  
  TheCurveTool::D1(THECURVE1,X(1),P1,T);
  D.Value(1,1) = T.X();
  D.Value(2,1) = T.Y();
 
  TheCurveTool::D1(THECURVE2,X(2),P2,T);
  D.Value(1,2) = -(T.X());
  D.Value(2,2) = -(T.Y());

  F.Value(1) = P1.X() - P2.X();
  F.Value(2) = P1.Y() - P2.Y();

return(Standard_True);
}
//======================================================================