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 // Created on: 1997-01-17
 // Created by: Didier PIFFAULT
 // Copyright (c) 1997-1999 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 _BRepAlgo_HeaderFile
 #define _BRepAlgo_HeaderFile
 
 #include <GeomAbs_Shape.hxx>
 #include <TopoDS_Shape.hxx>
 #include <NCollection_List.hxx>
 class TopoDS_Wire;
 class TopoDS_Edge;
 class TopoDS_Face;
 class TopoDS_Shape;
 
 //! The BRepAlgo class provides the following tools for:
 //! - Checking validity of the shape;
 //! - Concatenation of the edges of the wire.
 class BRepAlgo
 {
 public:
   //! this method makes a wire whose edges are C1 from
   //! a Wire whose edges could be G1. It removes a vertex
   //! between G1 edges.
   //! Option can be G1 or C1.
   Standard_EXPORT static TopoDS_Wire ConcatenateWire(const TopoDS_Wire&  Wire,
                                                      const GeomAbs_Shape Option,
                                                      const double        AngularTolerance = 1.0e-4);
 
   //! this method makes an edge from a wire.
   //! Junction points between edges of wire may be sharp,
   //! resulting curve of the resulting edge may be C0.
   Standard_EXPORT static TopoDS_Edge ConcatenateWireC0(const TopoDS_Wire& Wire);
 
   //! Method of wire conversion, calls BRepAlgo_Approx internally.
   //! @param theWire
   //!   Input Wire object.
   //! @param theAngleTolerance
   //!   Angle (in radians) defining the continuity of the wire: if two vectors
   //!   differ by less than this angle, the result will be smooth (zero angle of
   //!   tangent lines between curve elements).
   //! @return
   //!   The new TopoDS_Wire object consisting of edges each representing an arc
   //!   of circle or a linear segment. The accuracy of conversion is defined
   //!   as the maximal tolerance of edges in theWire.
   static Standard_EXPORT TopoDS_Wire ConvertWire(const TopoDS_Wire& theWire,
                                                  const double       theAngleTolerance,
                                                  const TopoDS_Face& theFace);
 
   //! Method of face conversion. The API corresponds to the method ConvertWire.
   //! This is a shortcut for calling ConvertWire() for each wire in theFace.
   static Standard_EXPORT TopoDS_Face ConvertFace(const TopoDS_Face& theFace,
                                                  const double       theAngleTolerance);
 
   //! Checks if the shape is "correct". If not, returns
   //! <false>, else returns <true>.
   Standard_EXPORT static bool IsValid(const TopoDS_Shape& S);
 
   //! Checks if the Generated and Modified Faces from
   //! the shapes <arguments> in the shape <result> are
   //! "correct". The args may be empty, then all faces
   //! will be checked.
   //! If <Closed> is True, only closed shape are valid.
   //! If <GeomCtrl> is False the geometry of new
   //! vertices and edges are not verified and the
   //! auto-intersection of new wires are not searched.
   Standard_EXPORT static bool IsValid(const NCollection_List<TopoDS_Shape>& theArgs,
                                       const TopoDS_Shape&                   theResult,
                                       const bool                            closedSolid = false,
                                       const bool                            GeomCtrl    = true);
 
   //! Checks if the shape is "correct".
   //! If not, returns FALSE, else returns TRUE.
   //! This method differs from the previous one in the fact that no geometric controls
   //! (intersection of wires, pcurve validity) are performed.
   Standard_EXPORT static bool IsTopologicallyValid(const TopoDS_Shape& S);
 };
 
 #endif // _BRepAlgo_HeaderFile

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