// Copyright (c) 1995-1999 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 <gp_Vec2d.hxx>



IntImpParGen_ImpParTool::IntImpParGen_ImpParTool(const ImpTool& ITool,
						 const ParCurve& PC):
	 TheImpTool(ITool) 
{  
  TheParCurve = (Standard_Address)(&PC);
}


Standard_Boolean IntImpParGen_ImpParTool::Value(const Standard_Real Param,
				   Standard_Real& ApproxDistance) {
  
  ApproxDistance = TheImpTool.Distance(ParTool::Value((*((ParCurve *)(TheParCurve))),Param));
  return(Standard_True);
}

Standard_Boolean IntImpParGen_ImpParTool::Derivative(const Standard_Real Param,
					Standard_Real& D_ApproxDistance_DV) {
  
  gp_Pnt2d Pt;
  gp_Vec2d TanParCurve;
  gp_Vec2d Grad=TheImpTool.GradDistance(ParTool::Value((*((ParCurve *)(TheParCurve))),Param));
  ParTool::D1((*((ParCurve *)(TheParCurve))),Param,Pt,TanParCurve);
  D_ApproxDistance_DV = Grad.Dot(TanParCurve);
  return(Standard_True);
}


Standard_Boolean IntImpParGen_ImpParTool::Values(const Standard_Real Param,
				    Standard_Real& ApproxDistance,
				    Standard_Real& Deriv) {
  
  this->Value(Param,ApproxDistance);
  this->Derivative(Param,Deriv);
  return(Standard_True);
}