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 // Created on: 1991-12-02
 // Created by: Laurent PAINNOT
 // Copyright (c) 1991-1999 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 _AppDef_Compute_HeaderFile
 #define _AppDef_Compute_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_DefineAlloc.hxx>
 #include <Standard_Handle.hxx>
 
 #include <AppParCurves_MultiCurve.hxx>
 #include <NCollection_Sequence.hxx>
 #include <AppParCurves_MultiBSpCurve.hxx>
 #include <Approx_ParametrizationType.hxx>
 #include <NCollection_Array1.hxx>
 #include <NCollection_HArray1.hxx>
 #include <AppParCurves_ConstraintCouple.hxx>
 #include <Standard_Integer.hxx>
 #include <AppParCurves_Constraint.hxx>
 #include <math_Vector.hxx>
 class AppDef_MultiLine;
 class AppDef_MyLineTool;
 class AppDef_MyGradientOfCompute;
 class AppDef_ParLeastSquareOfMyGradientOfCompute;
 class AppDef_ResConstraintOfMyGradientOfCompute;
 class AppDef_ParFunctionOfMyGradientOfCompute;
 class AppDef_Gradient_BFGSOfMyGradientOfCompute;
 class AppParCurves_MultiCurve;
 class AppParCurves_MultiBSpCurve;
 
 class AppDef_Compute
 {
 public:
   DEFINE_STANDARD_ALLOC
 
   //! The MultiLine <Line> will be approximated until tolerances
   //! will be reached.
   //! The approximation will be done from degreemin to degreemax
   //! with a cutting if the corresponding boolean is True.
   //! If <Squares> is True, the computation will be done with
   //! no iteration at all.
   Standard_EXPORT AppDef_Compute(
     const AppDef_MultiLine&          Line,
     const int                        degreemin       = 4,
     const int                        degreemax       = 8,
     const double                     Tolerance3d     = 1.0e-3,
     const double                     Tolerance2d     = 1.0e-6,
     const int                        NbIterations    = 5,
     const bool                       cutting         = true,
     const Approx_ParametrizationType parametrization = Approx_ChordLength,
     const bool                       Squares         = false);
 
   //! The MultiLine <Line> will be approximated until tolerances
   //! will be reached.
   //! The approximation will be done from degreemin to degreemax
   //! with a cutting if the corresponding boolean is True.
   //! If <Squares> is True, the computation will be done with
   //! no iteration at all.
   Standard_EXPORT AppDef_Compute(const AppDef_MultiLine& Line,
                                  const math_Vector&      Parameters,
                                  const int               degreemin    = 4,
                                  const int               degreemax    = 8,
                                  const double            Tolerance3d  = 1.0e-03,
                                  const double            Tolerance2d  = 1.0e-06,
                                  const int               NbIterations = 5,
                                  const bool              cutting      = true,
                                  const bool              Squares      = false);
 
   //! Initializes the fields of the algorithm.
   Standard_EXPORT AppDef_Compute(const math_Vector& Parameters,
                                  const int          degreemin    = 4,
                                  const int          degreemax    = 8,
                                  const double       Tolerance3d  = 1.0e-03,
                                  const double       Tolerance2d  = 1.0e-06,
                                  const int          NbIterations = 5,
                                  const bool         cutting      = true,
                                  const bool         Squares      = false);
 
   //! Initializes the fields of the algorithm.
   Standard_EXPORT AppDef_Compute(
     const int                        degreemin       = 4,
     const int                        degreemax       = 8,
     const double                     Tolerance3d     = 1.0e-03,
     const double                     Tolerance2d     = 1.0e-06,
     const int                        NbIterations    = 5,
     const bool                       cutting         = true,
     const Approx_ParametrizationType parametrization = Approx_ChordLength,
     const bool                       Squares         = false);
 
   //! Initializes the fields of the algorithm.
   Standard_EXPORT void Init(const int                        degreemin       = 4,
                             const int                        degreemax       = 8,
                             const double                     Tolerance3d     = 1.0e-03,
                             const double                     Tolerance2d     = 1.0e-06,
                             const int                        NbIterations    = 5,
                             const bool                       cutting         = true,
                             const Approx_ParametrizationType parametrization = Approx_ChordLength,
                             const bool                       Squares         = false);
 
   //! runs the algorithm after having initialized the fields.
   Standard_EXPORT void Perform(const AppDef_MultiLine& Line);
 
   //! changes the degrees of the approximation.
   Standard_EXPORT void SetDegrees(const int degreemin, const int degreemax);
 
   //! Changes the tolerances of the approximation.
   Standard_EXPORT void SetTolerances(const double Tolerance3d, const double Tolerance2d);
 
   //! changes the first and the last constraint points.
   Standard_EXPORT void SetConstraints(const AppParCurves_Constraint firstC,
                                       const AppParCurves_Constraint lastC);
 
   //! returns False if at a moment of the approximation,
   //! the status NoApproximation has been sent by the user
   //! when more points were needed.
   Standard_EXPORT bool IsAllApproximated() const;
 
   //! returns False if the status NoPointsAdded has been sent.
   Standard_EXPORT bool IsToleranceReached() const;
 
   //! returns the tolerances 2d and 3d of the <Index> MultiCurve.
   Standard_EXPORT void Error(const int Index, double& tol3d, double& tol2d) const;
 
   //! Returns the number of MultiCurve doing the approximation
   //! of the MultiLine.
   Standard_EXPORT int NbMultiCurves() const;
 
   //! returns the result of the approximation.
   Standard_EXPORT const AppParCurves_MultiCurve& Value(const int Index = 1) const;
 
   //! returns the result of the approximation.
   Standard_EXPORT AppParCurves_MultiCurve& ChangeValue(const int Index = 1);
 
   //! returns the result of the approximation.
   Standard_EXPORT const AppParCurves_MultiBSpCurve& SplineValue();
 
   //! returns the type of parametrization
   Standard_EXPORT Approx_ParametrizationType Parametrization() const;
 
   //! returns the new parameters of the approximation
   //! corresponding to the points of the multicurve <Index>.
   Standard_EXPORT const NCollection_Array1<double>& Parameters(const int Index = 1) const;
 
 private:
   //! is internally used in the algorithm.
   Standard_EXPORT bool Compute(const AppDef_MultiLine& Line,
                                const int               fpt,
                                const int               lpt,
                                math_Vector&            Para,
                                double&                 TheTol3d,
                                double&                 TheTol2d,
                                int&                    indbad);
 
   //! is internally used in the algorithm.
   Standard_EXPORT bool ComputeCurve(const AppDef_MultiLine& Line,
                                     const int               firspt,
                                     const int               lastpt);
 
   //! computes new parameters between firstP and lastP.
   Standard_EXPORT void Parameters(const AppDef_MultiLine& Line,
                                   const int               firstP,
                                   const int               LastP,
                                   math_Vector&            TheParameters) const;
 
   Standard_EXPORT double SearchFirstLambda(const AppDef_MultiLine& Line,
                                            const math_Vector&      Para,
                                            const math_Vector&      V,
                                            const int               index) const;
 
   Standard_EXPORT double SearchLastLambda(const AppDef_MultiLine& Line,
                                           const math_Vector&      Para,
                                           const math_Vector&      V,
                                           const int               index) const;
 
   Standard_EXPORT void FirstTangencyVector(const AppDef_MultiLine& Line,
                                            const int               index,
                                            math_Vector&            V) const;
 
   Standard_EXPORT void LastTangencyVector(const AppDef_MultiLine& Line,
                                           const int               index,
                                           math_Vector&            V) const;
 
   NCollection_Sequence<AppParCurves_MultiCurve>                   myMultiCurves;
   AppParCurves_MultiCurve                                         TheMultiCurve;
   AppParCurves_MultiBSpCurve                                      myspline;
   bool                                                            alldone;
   bool                                                            tolreached;
   Approx_ParametrizationType                                      Par;
   occ::handle<NCollection_HArray1<double>>                        myParameters;
   occ::handle<NCollection_HArray1<double>>                        myfirstParam;
   NCollection_Sequence<occ::handle<NCollection_HArray1<double>>>  myPar;
   NCollection_Sequence<double>                                    Tolers3d;
   NCollection_Sequence<double>                                    Tolers2d;
   occ::handle<NCollection_HArray1<AppParCurves_ConstraintCouple>> myConstraints;
   int                                                             mydegremin;
   int                                                             mydegremax;
   double                                                          mytol3d;
   double                                                          mytol2d;
   double                                                          currenttol3d;
   double                                                          currenttol2d;
   bool                                                            mycut;
   bool                                                            mysquares;
   int                                                             myitermax;
   AppParCurves_Constraint                                         myfirstC;
   AppParCurves_Constraint                                         mylastC;
   int                                                             myMultiLineNb;
   bool                                                            myIsClear;
 };
 
 #endif // _AppDef_Compute_HeaderFile

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