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 // Created on: 1994-01-10
 // Created by: Yves FRICAUD
 // Copyright (c) 1994-1999 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 _Bisector_BisecPC_HeaderFile
 #define _Bisector_BisecPC_HeaderFile
 
 #include <Standard.hxx>
 
 #include <gp_Pnt2d.hxx>
 #include <NCollection_Sequence.hxx>
 #include <Standard_Integer.hxx>
 #include <Bisector_Curve.hxx>
 #include <GeomAbs_Shape.hxx>
 class Geom2d_Curve;
 class Geom2d_Geometry;
 class gp_Trsf2d;
 class gp_Vec2d;
 
 //! Provides the bisector between a point and a curve.
 //! the curvature on the curve has to be monoton.
 //! the point can't be on the curve except at the extremities.
 class Bisector_BisecPC : public Bisector_Curve
 {
 
 public:
   Standard_EXPORT Bisector_BisecPC();
 
   //! Constructs the bisector between the point <P> and
   //! the curve <Cu>.
   //! <Side> = 1. if the bisector curve is on the Left of <Cu>
   //! else <Side> = -1.
   //! <DistMax> is used to trim the bisector.The distance
   //! between the points of the bisector and <Cu> is smaller
   //! than <DistMax>.
   Standard_EXPORT Bisector_BisecPC(const occ::handle<Geom2d_Curve>& Cu,
                                    const gp_Pnt2d&                  P,
                                    const double                     Side,
                                    const double                     DistMax = 500);
 
   //! Constructs the bisector between the point <P> and
   //! the curve <Cu> Trimmed by <UMin> and <UMax>
   //! <Side> = 1. if the bisector curve is on the Left of <Cu>
   //! else <Side> = -1.
   //! Warning: the bisector is supposed all over defined between
   //! <UMin> and <UMax>.
   Standard_EXPORT Bisector_BisecPC(const occ::handle<Geom2d_Curve>& Cu,
                                    const gp_Pnt2d&                  P,
                                    const double                     Side,
                                    const double                     UMin,
                                    const double                     UMax);
 
   //! Construct the bisector between the point <P> and
   //! the curve <Cu>.
   //! <Side> = 1. if the bisector curve is on the Left of <Cu>
   //! else <Side> = -1.
   //! <DistMax> is used to trim the bisector.The distance
   //! between the points of the bisector and <Cu> is smaller
   //! than <DistMax>.
   Standard_EXPORT void Perform(const occ::handle<Geom2d_Curve>& Cu,
                                const gp_Pnt2d&                  P,
                                const double                     Side,
                                const double                     DistMax = 500);
 
   //! Returns True if the bisector is extended at start.
   Standard_EXPORT bool IsExtendAtStart() const override;
 
   //! Returns True if the bisector is extended at end.
   Standard_EXPORT bool IsExtendAtEnd() const override;
 
   //! Changes the direction of parametrization of <me>.
   //! The orientation of the curve is modified. If the curve
   //! is bounded the StartPoint of the initial curve becomes the
   //! EndPoint of the reversed curve and the EndPoint of the initial
   //! curve becomes the StartPoint of the reversed curve.
   Standard_EXPORT void Reverse() override;
 
   //! Returns the parameter on the reversed curve for
   //! the point of parameter U on <me>.
   Standard_EXPORT double ReversedParameter(const double U) const override;
 
   Standard_EXPORT occ::handle<Geom2d_Geometry> Copy() const override;
 
   //! Transformation of a geometric object. This transformation
   //! can be a translation, a rotation, a symmetry, a scaling
   //! or a complex transformation obtained by combination of
   //! the previous elementaries transformations.
   Standard_EXPORT void Transform(const gp_Trsf2d& T) override;
 
   //! Returns the order of continuity of the curve.
   //! Raised if N < 0.
   Standard_EXPORT bool IsCN(const int N) const override;
 
   //! Value of the first parameter.
   Standard_EXPORT double FirstParameter() const override;
 
   //! Value of the last parameter.
   Standard_EXPORT double LastParameter() const override;
 
   Standard_EXPORT GeomAbs_Shape Continuity() const override;
 
   //! If necessary, breaks the curve in intervals of
   //! continuity <C1>. And returns the number of
   //! intervals.
   Standard_EXPORT int NbIntervals() const override;
 
   //! Returns the first parameter of the current
   //! interval.
   Standard_EXPORT double IntervalFirst(const int Index) const override;
 
   //! Returns the last parameter of the current
   //! interval.
   Standard_EXPORT double IntervalLast(const int Index) const override;
 
   Standard_EXPORT GeomAbs_Shape IntervalContinuity() const;
 
   Standard_EXPORT bool IsClosed() const override;
 
   Standard_EXPORT bool IsPeriodic() const override;
 
   //! Returns the distance between the point of
   //! parameter U on <me> and my point or my curve.
   Standard_EXPORT double Distance(const double U) const;
 
   Standard_EXPORT gp_Pnt2d EvalD0(const double U) const override;
 
   Standard_EXPORT Geom2d_Curve::ResD1 EvalD1(const double U) const override;
 
   Standard_EXPORT Geom2d_Curve::ResD2 EvalD2(const double U) const override;
 
   Standard_EXPORT Geom2d_Curve::ResD3 EvalD3(const double U) const override;
 
   Standard_EXPORT gp_Vec2d EvalDN(const double U, const int N) const override;
 
   Standard_EXPORT void Dump(const int Deep = 0, const int Offset = 0) const;
 
   //! Returns the parameter on the curve1 of the projection
   //! of the point of parameter U on <me>.
   Standard_EXPORT double LinkBisCurve(const double U) const;
 
   //! Returns the reciproque of LinkBisCurve.
   Standard_EXPORT double LinkCurveBis(const double U) const;
 
   //! Returns the parameter on <me> corresponding to <P>.
   Standard_EXPORT double Parameter(const gp_Pnt2d& P) const override;
 
   //! Returns <True> if the bisector is empty.
   Standard_EXPORT bool IsEmpty() const;
 
   DEFINE_STANDARD_RTTIEXT(Bisector_BisecPC, Bisector_Curve)
 
 private:
   Standard_EXPORT void Values(const double U,
                               const int    N,
                               gp_Pnt2d&    P,
                               gp_Vec2d&    V1,
                               gp_Vec2d&    V2,
                               gp_Vec2d&    V3) const;
 
   Standard_EXPORT void Extension(const double U,
                                  gp_Pnt2d&    P,
                                  gp_Vec2d&    V1,
                                  gp_Vec2d&    V2,
                                  gp_Vec2d&    V3) const;
 
   //! Computes the interval where the bisector is defined.
   Standard_EXPORT void ComputeIntervals();
 
   Standard_EXPORT void CuspFilter();
 
   Standard_EXPORT double SearchBound(const double U1, const double U2) const;
 
   Standard_EXPORT void Init(const occ::handle<Geom2d_Curve>&    Curve,
                             const gp_Pnt2d&                     Point,
                             const double                        Sign,
                             const NCollection_Sequence<double>& StartIntervals,
                             const NCollection_Sequence<double>& EndIntervals,
                             const int                           BisInterval,
                             const int                           CurrentInterval,
                             const double                        ShiftParameter,
                             const double                        DistMax,
                             const bool                          IsEmpty,
                             const bool                          IsConvex,
                             const bool                          ExtensionStart,
                             const bool                          ExtensionEnd,
                             const gp_Pnt2d&                     PointStartBis,
                             const gp_Pnt2d&                     PointEndBis);
 
   occ::handle<Geom2d_Curve>    curve;
   gp_Pnt2d                     point;
   double                       sign;
   NCollection_Sequence<double> startIntervals;
   NCollection_Sequence<double> endIntervals;
   int                          bisInterval;
   int                          currentInterval;
   double                       shiftParameter;
   double                       distMax;
   bool                         isEmpty;
   bool                         isConvex;
   bool                         extensionStart;
   bool                         extensionEnd;
   gp_Pnt2d                     pointStartBis;
   gp_Pnt2d                     pointEndBis;
 };
 
 #endif // _Bisector_BisecPC_HeaderFile

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