//  Copyright (C) 2007-2010  CEA/DEN, EDF R&D, OPEN CASCADE
//
//  Copyright (C) 2003-2007  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.salome-platform.org/ or email : webmaster.salome@opencascade.com
//

//  GEOM OBJECT : interactive object for Geometry entities visualization
//  File   : GEOM_OCCReader.h
//  Author : Christophe ATTANASIO
//  Module : GEOM
//  $Header: /home/server/cvs/GEOM/GEOM_SRC/src/OBJECT/GEOM_OCCReader.h,v 1.8.2.1.10.1 2010-04-21 08:08:25 vsr Exp $
//
/*!
  \class GEOM_OCCReader GEOM_OCCReader.h
  \brief This class allow to display a OpenCASCADE CAD model in a VTK viewer.
*/

#ifndef GEOM_OCCREADER_H
#define GEOM_OCCREADER_H

#include "GEOM_OBJECT_defs.hxx"

#include <vtkPolyDataSource.h>

class vtkPoints;
class vtkCellArray;

// OpenCASCADE
#include <TopoDS_Shape.hxx>
#include <TopoDS.hxx>
#include <GeomAbs_IsoType.hxx>
#include <BRepAdaptor_Surface.hxx>

class GEOM_OBJECT_EXPORT GEOM_OCCReader : public vtkPolyDataSource {

  // methods    

 public:        

  static GEOM_OCCReader* New();

  const TopoDS_Shape& getTopo();

  void setTopo(const TopoDS_Shape& ashape, bool isVector = false);

  int  getDisplayMode();
  void setDisplayMode(int);

  void setForceUpdate(Standard_Boolean bol);

 protected:

  GEOM_OCCReader();
  ~GEOM_OCCReader();
  void Execute();       

  void ComputeShading(vtkPoints* Pts,vtkCellArray* Cells);
  void ComputeWireframe(vtkPoints* Pts,vtkCellArray* Cells);

  void TransferFaceSData(const TopoDS_Face& aFace,
                         vtkPoints* Pts,
                         vtkCellArray* Cells);

  void TransferFaceWData(const TopoDS_Face& aFace,
                         vtkPoints* Pts,
                         vtkCellArray* Cells);

  void TransferEdgeSData(const TopoDS_Edge& aEdge,
                         vtkPoints* Pts,
                         vtkCellArray* Cells);

  void TransferEdgeWData(const TopoDS_Edge& aEdge,
                         vtkPoints* Pts,
                         vtkCellArray* Cells);

  void TransferVertexWData(const TopoDS_Vertex& aVertex,
                           vtkPoints* Pts,
                           vtkCellArray* Cells);

  void createISO(const TopoDS_Face &, 
                 double, int,
                 vtkPoints* Pts,
                 vtkCellArray* Cells);
  
  void DrawIso(GeomAbs_IsoType aType,
               Standard_Real PParm,
               Standard_Real p1,
               Standard_Real p2,
               vtkPoints* Pts,
               vtkCellArray* Cells,
               Standard_Integer& startidx);
  
  void MoveTo(gp_Pnt P,
              vtkPoints* Pts);

  void DrawTo(gp_Pnt P,
              vtkPoints* Pts,
              vtkCellArray* Cells);

  void PlotIso(BRepAdaptor_Surface& S, 
               GeomAbs_IsoType T,
               Standard_Real& U, 
               Standard_Real& V, 
               Standard_Real Step, 
               Standard_Boolean& halt,
               vtkPoints* Pts,
               vtkCellArray* Cells);

  // fields

 private:

  Standard_Boolean       forced;
  int                    discretiso;
  int                    amode;
  int                    nbisos;
  TopoDS_Shape           myShape;
  bool                   myIsVector;

};

#endif //GEOM_OCCREADER_H
