// Created by: Peter KURNEV
// 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 _BOPTools_AlgoTools2D_HeaderFile
#define _BOPTools_AlgoTools2D_HeaderFile

#include <Standard.hxx>
#include <Standard_DefineAlloc.hxx>
#include <Standard_Handle.hxx>

#include <Standard_Boolean.hxx>
#include <Standard_Real.hxx>
#include <Standard_Integer.hxx>
class TopoDS_Edge;
class TopoDS_Face;
class gp_Vec;
class Geom2d_Curve;
class Geom_Curve;
class BRepAdaptor_Surface;
class IntTools_Context;



//! The class contains handy static functions
//! dealing with the topology
//! This is the copy of the BOPTools_AlgoTools2D.cdl
class BOPTools_AlgoTools2D 
{
public:

  DEFINE_STANDARD_ALLOC

  //! Compute P-Curve for the edge <aE> on the face <aF>.<br>
  //! Raises exception Standard_ConstructionError if projection algorithm fails.<br>
  //! <theContext> - storage for caching the geometrical tools
  Standard_EXPORT static void BuildPCurveForEdgeOnFace(const TopoDS_Edge& aE,
                                                       const TopoDS_Face& aF,
                                                       const Handle(IntTools_Context)& theContext = Handle(IntTools_Context)());

  //! Compute tangent for the edge  <aE> [in 3D]  at parameter <aT>
  Standard_EXPORT static Standard_Boolean EdgeTangent(const TopoDS_Edge& anE,
                                                      const Standard_Real aT,
                                                      gp_Vec& Tau);

  //! Compute surface parameters <U,V> of the face <aF>
  //! for  the point from the edge <aE> at parameter <aT>.<br>
  //! If <aE> has't pcurve on surface, algorithm tries to get it by
  //! projection and can
  //! raise exception Standard_ConstructionError if projection algorithm fails.<br>
  //! <theContext> - storage for caching the geometrical tools
  Standard_EXPORT static void PointOnSurface(const TopoDS_Edge& aE,
                                             const TopoDS_Face& aF,
                                             const Standard_Real aT,
                                             Standard_Real& U,
                                             Standard_Real& V,
                                             const Handle(IntTools_Context)& theContext = Handle(IntTools_Context)());

  //! Get P-Curve <aC>  for the edge <aE> on surface <aF> .<br>
  //! If the P-Curve does not exist, build  it using Make2D().<br>
  //! [aToler] - reached tolerance
  //! Raises exception Standard_ConstructionError if algorithm Make2D() fails.<br>
  //! <theContext> - storage for caching the geometrical tools
  Standard_EXPORT static void CurveOnSurface(const TopoDS_Edge& aE,
                                             const TopoDS_Face& aF,
                                             Handle(Geom2d_Curve)& aC,
                                             Standard_Real& aToler,
                                             const Handle(IntTools_Context)& theContext = Handle(IntTools_Context)());

  //! Get P-Curve <aC>  for the edge <aE> on surface <aF> .<br>
  //! If the P-Curve does not exist, build  it using Make2D().<br>
  //! [aFirst, aLast] - range of the P-Curve<br>
  //! [aToler] - reached tolerance<br>
  //! Raises exception Standard_ConstructionError if algorithm Make2D() fails.<br>
  //! <theContext> - storage for caching the geometrical tools
  Standard_EXPORT static void CurveOnSurface(const TopoDS_Edge& aE,
                                             const TopoDS_Face& aF,
                                             Handle(Geom2d_Curve)& aC,
                                             Standard_Real& aFirst,
                                             Standard_Real& aLast,
                                             Standard_Real& aToler,
                                             const Handle(IntTools_Context)& theContext = Handle(IntTools_Context)());

  //! Returns TRUE if the edge <aE>  has  P-Curve <aC>
  //! on surface <aF> .
  //! [aFirst, aLast] - range of the P-Curve
  //! [aToler] - reached tolerance
  //! If the P-Curve does not exist, aC.IsNull()=TRUE.
  Standard_EXPORT static Standard_Boolean HasCurveOnSurface(const TopoDS_Edge& aE,
                                                            const TopoDS_Face& aF,
                                                            Handle(Geom2d_Curve)& aC,
                                                            Standard_Real& aFirst,
                                                            Standard_Real& aLast,
                                                            Standard_Real& aToler);

  //! Returns TRUE if the edge <aE>  has  P-Curve <aC>
  //! on surface <aF> .
  //! If the P-Curve does not exist, aC.IsNull()=TRUE.
  Standard_EXPORT static Standard_Boolean HasCurveOnSurface(const TopoDS_Edge& aE,
                                                            const TopoDS_Face& aF);

  //! Adjust P-Curve <theC2D> (3D-curve <theC3D>) on surface of the face <theF>.<br>
  //! <theContext> - storage for caching the geometrical tools
  Standard_EXPORT static void AdjustPCurveOnFace(const TopoDS_Face& theF,
                                                 const Handle(Geom_Curve)& theC3D,
                                                 const Handle(Geom2d_Curve)& theC2D,
                                                 Handle(Geom2d_Curve)& theC2DA,
                                                 const Handle(IntTools_Context)& theContext = Handle(IntTools_Context)());

  //! Adjust P-Curve <aC2D> (3D-curve <C3D>) on surface <aF> .<br>
  //! [aT1,  aT2] - range to adjust<br>
  //! <theContext> - storage for caching the geometrical tools
  Standard_EXPORT static void AdjustPCurveOnFace(const TopoDS_Face& theF,
                                                 const Standard_Real theFirst,
                                                 const Standard_Real theLast,
                                                 const Handle(Geom2d_Curve)& theC2D,
                                                 Handle(Geom2d_Curve)& theC2DA,
                                                 const Handle(IntTools_Context)& theContext = Handle(IntTools_Context)());

  //! Adjust P-Curve <aC2D> (3D-curve <C3D>) on surface <aF> .
  //! [aT1,  aT2] - range to adjust
  Standard_EXPORT static void AdjustPCurveOnSurf(const BRepAdaptor_Surface& aF,
                                                 const Standard_Real aT1,
                                                 const Standard_Real aT2,
                                                 const Handle(Geom2d_Curve)& aC2D,
                                                 Handle(Geom2d_Curve)& aC2DA);

  //! Compute intermediate  value in  between [aFirst, aLast] .
  Standard_EXPORT static Standard_Real IntermediatePoint(const Standard_Real aFirst,
                                                         const Standard_Real aLast);

  //! Compute intermediate value of parameter for the edge <anE>.
  Standard_EXPORT static Standard_Real IntermediatePoint(const TopoDS_Edge& anE);

  //! Make P-Curve <aC> for the edge <aE> on surface <aF> .<br>
  //! [aFirst, aLast] - range of the P-Curve<br>
  //! [aToler] - reached tolerance<br>
  //! Raises exception Standard_ConstructionError if algorithm fails.<br>
  //! <theContext> - storage for caching the geometrical tools
  Standard_EXPORT static void Make2D(const TopoDS_Edge& aE,
                                     const TopoDS_Face& aF,
                                     Handle(Geom2d_Curve)& aC,
                                     Standard_Real& aFirst,
                                     Standard_Real& aLast,
                                     Standard_Real& aToler,
                                     const Handle(IntTools_Context)& theContext = Handle(IntTools_Context)());

  //! Make P-Curve <aC> for the 3D-curve <C3D> on surface <aF> .<br>
  //! [aToler] - reached tolerance<br>
  //! Raises exception Standard_ConstructionError if projection algorithm fails.<br>
  //! <theContext> - storage for caching the geometrical tools
  Standard_EXPORT static void MakePCurveOnFace(const TopoDS_Face& aF,
                                               const Handle(Geom_Curve)& C3D,
                                               Handle(Geom2d_Curve)& aC,
                                               Standard_Real& aToler,
                                               const Handle(IntTools_Context)& theContext = Handle(IntTools_Context)());

  //! Make P-Curve <aC> for the 3D-curve <C3D> on surface <aF> .<br>
  //! [aT1,  aT2] - range to build<br>
  //! [aToler] - reached tolerance<br>
  //! Raises exception Standard_ConstructionError if projection algorithm fails.<br>
  //! <theContext> - storage for caching the geometrical tools
  Standard_EXPORT static void MakePCurveOnFace(const TopoDS_Face& aF,
                                               const Handle(Geom_Curve)& C3D,
                                               const Standard_Real aT1,
                                               const Standard_Real aT2,
                                               Handle(Geom2d_Curve)& aC,
                                               Standard_Real& aToler,
                                               const Handle(IntTools_Context)& theContext = Handle(IntTools_Context)());

  //! Attach P-Curve from the edge <aEold> on surface <aF>
  //! to the edge <aEnew>
  //! Returns 0 in case of success
  Standard_EXPORT static Standard_Integer AttachExistingPCurve(const TopoDS_Edge& aEold,
                                                               const TopoDS_Edge& aEnew,
                                                               const TopoDS_Face& aF,
                                                               const Handle(IntTools_Context)& aCtx);

  //! Checks if CurveOnSurface of theE on theF matches with isoline of theF surface.
  //! Sets corresponding values for isTheUIso and isTheVIso variables.
  //!
  //! ATTENTION!!!
  //! This method is based on the comparison between direction of
  //! surface (which theF is based on) iso-lines and the direction
  //! of the edge p-curve (on theF) in middle-point of the p-curve.
  //!
  //! This method should be used carefully
  //! (e.g. BRep_Tool::IsClosed(...) together) in order to avoid
  //! false classification some p-curves as isoline (e.g. circle on a plane).
  Standard_EXPORT static void IsEdgeIsoline(const TopoDS_Edge& theE,
                                            const TopoDS_Face& theF,
                                            Standard_Boolean& isTheUIso,
                                            Standard_Boolean& isTheVIso);

};

#endif // _BOPTools_AlgoTools2D_HeaderFile