//  SMESH SMESH : implementaion of SMESH idl descriptions
//
//  Copyright (C) 2003  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
//  CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS 
// 
//  This library is free software; you can redistribute it and/or 
//  modify it under the terms of the GNU Lesser General Public 
//  License as published by the Free Software Foundation; either 
//  version 2.1 of the License. 
// 
//  This library is distributed in the hope that it will be useful, 
//  but WITHOUT ANY WARRANTY; without even the implied warranty of 
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU 
//  Lesser General Public License for more details. 
// 
//  You should have received a copy of the GNU Lesser General Public 
//  License along with this library; if not, write to the Free Software 
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA 
// 
//  See http://www.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org 
//
//
//
//  File   : SMESH_Algo.cxx
//  Author : Paul RASCLE, EDF
//  Module : SMESH
//  $Header$

using namespace std;
#include "SMESH_Algo.hxx"
#include "SMESH_Gen.hxx"
#include "SMESH_Mesh.hxx"
#include "SMESH_HypoFilter.hxx"

#include <GeomAdaptor_Curve.hxx>
#include <BRep_Tool.hxx>
#include <GCPnts_AbscissaPoint.hxx>

#include "utilities.h"

#include <algorithm>
#include <TopTools_ListOfShape.hxx>
#include <TopTools_ListIteratorOfListOfShape.hxx>

//=============================================================================
/*!
 *  
 */
//=============================================================================

SMESH_Algo::SMESH_Algo(int hypId, int studyId,
	SMESH_Gen * gen):SMESH_Hypothesis(hypId, studyId, gen)
{
//   _compatibleHypothesis.push_back("hypothese_bidon");
	_type = ALGO;
	gen->_mapAlgo[hypId] = this;

        _onlyUnaryInput = _requireDescretBoundary = true;
}

//=============================================================================
/*!
 *  
 */
//=============================================================================

SMESH_Algo::~SMESH_Algo()
{
}

//=============================================================================
/*!
 *  
 */
//=============================================================================

const vector < string > &SMESH_Algo::GetCompatibleHypothesis()
{
	return _compatibleHypothesis;
}

//=============================================================================
/*!
 *  List the hypothesis used by the algorithm associated to the shape.
 *  Hypothesis associated to father shape -are- taken into account (see
 *  GetAppliedHypothesis). Relevant hypothesis have a name (type) listed in
 *  the algorithm. This method could be surcharged by specific algorithms, in 
 *  case of several hypothesis simultaneously applicable.
 */
//=============================================================================

const list <const SMESHDS_Hypothesis *> & SMESH_Algo::GetUsedHypothesis(
	SMESH_Mesh & aMesh, const TopoDS_Shape & aShape)
{
  _usedHypList.clear();
  if ( !_compatibleHypothesis.empty() )
  {
    SMESH_HypoFilter filter( SMESH_HypoFilter::HasName( _compatibleHypothesis[0] ));
    for ( int i = 1; i < _compatibleHypothesis.size(); ++i )
      filter.Or( filter.HasName( _compatibleHypothesis[ i ] ));

    aMesh.GetHypotheses( aShape, filter, _usedHypList, true );
    if ( _usedHypList.size() > 1 )
      _usedHypList.clear();	//only one compatible hypothesis allowed
  }
  return _usedHypList;
}

//=============================================================================
/*!
 *  List the relevant hypothesis associated to the shape. Relevant hypothesis
 *  have a name (type) listed in the algorithm. Hypothesis associated to
 *  father shape -are not- taken into account (see GetUsedHypothesis)
 */
//=============================================================================

const list<const SMESHDS_Hypothesis *> & SMESH_Algo::GetAppliedHypothesis(
	SMESH_Mesh & aMesh, const TopoDS_Shape & aShape)
{
  _appliedHypList.clear();
  if ( !_compatibleHypothesis.empty() )
  {
    SMESH_HypoFilter filter( SMESH_HypoFilter::HasName( _compatibleHypothesis[0] ));
    for ( int i = 1; i < _compatibleHypothesis.size(); ++i )
      filter.Or( filter.HasName( _compatibleHypothesis[ i ] ));
    
    aMesh.GetHypotheses( aShape, filter, _appliedHypList, false );
  }
  return _appliedHypList;
}

//=============================================================================
/*!
 *  Compute length of an edge
 */
//=============================================================================

double SMESH_Algo::EdgeLength(const TopoDS_Edge & E)
{
	double UMin = 0, UMax = 0;
	TopLoc_Location L;
	if (BRep_Tool::Degenerated(E))
		return 0;
	Handle(Geom_Curve) C = BRep_Tool::Curve(E, L, UMin, UMax);
	GeomAdaptor_Curve AdaptCurve(C);
	GCPnts_AbscissaPoint gabs;
	double length = gabs.Length(AdaptCurve, UMin, UMax);
	return length;
}