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 // Created on: 1991-02-27
 // Created by: Jean Claude Vauthier
 // 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 _CPnts_UniformDeflection_HeaderFile
 #define _CPnts_UniformDeflection_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_DefineAlloc.hxx>
 
 #include <Standard_Integer.hxx>
 #include <gp_Pnt.hxx>
 class Adaptor3d_Curve;
 class Adaptor2d_Curve2d;
 
 //! This class defines an algorithm to create a set of points
 //! (with a given chordal deviation) at the
 //! positions of constant deflection of a given parametrized curve or a trimmed
 //! circle.
 //! The continuity of the curve must be at least C2.
 //!
 //! the usage of the is the following.
 //!
 //! class myUniformDFeflection instantiates
 //! UniformDeflection(Curve, Tool);
 //!
 //! Curve C; // Curve inherits from Curve or Curve2d from Adaptor2d
 //! myUniformDeflection Iter1;
 //! DefPntOfmyUniformDeflection P;
 //!
 //! for(Iter1.Initialize(C, Deflection, EPSILON, True);
 //! Iter1.More();
 //! Iter1.Next()) {
 //! P = Iter1.Value();
 //! ... make something with P
 //! }
 //! if(!Iter1.IsAllDone()) {
 //! ... something wrong happened
 //! }
 class CPnts_UniformDeflection
 {
 public:
   DEFINE_STANDARD_ALLOC
 
   //! creation of a indefinite UniformDeflection
   Standard_EXPORT CPnts_UniformDeflection();
 
   //! Computes a uniform deflection distribution of points
   //! on the curve <C>.
   //! <Deflection> defines the constant deflection value.
   //! The algorithm computes the number of points and the points.
   //! The curve <C> must be at least C2 else the computation can fail.
   //! If just some parts of the curve is C2 it is better to give the
   //! parameters bounds and to use the below constructor .
   //! if <WithControl> is True, the algorithm controls the estimate
   //! deflection
   //! when the curve is singular at the point P(u),the algorithm
   //! computes the next point as
   //! P(u + std::max(CurrentStep,std::abs(LastParameter-FirstParameter)))
   //! if the singularity is at the first point ,the next point
   //! calculated is the P(LastParameter)
   Standard_EXPORT CPnts_UniformDeflection(const Adaptor3d_Curve& C,
                                           const double           Deflection,
                                           const double           Resolution,
                                           const bool             WithControl);
 
   //! As above with 2d curve
   Standard_EXPORT CPnts_UniformDeflection(const Adaptor2d_Curve2d& C,
                                           const double             Deflection,
                                           const double             Resolution,
                                           const bool               WithControl);
 
   //! Computes an uniform deflection distribution of points on a part of
   //! the curve <C>. Deflection defines the step between the points.
   //! <U1> and <U2> define the distribution span.
   //! <U1> and <U2> must be in the parametric range of the curve.
   Standard_EXPORT CPnts_UniformDeflection(const Adaptor3d_Curve& C,
                                           const double           Deflection,
                                           const double           U1,
                                           const double           U2,
                                           const double           Resolution,
                                           const bool             WithControl);
 
   //! As above with 2d curve
   Standard_EXPORT CPnts_UniformDeflection(const Adaptor2d_Curve2d& C,
                                           const double             Deflection,
                                           const double             U1,
                                           const double             U2,
                                           const double             Resolution,
                                           const bool               WithControl);
 
   //! Initialize the algorithms with <C>, <Deflection>, <UStep>,
   //! <Resolution> and <WithControl>
   Standard_EXPORT void Initialize(const Adaptor3d_Curve& C,
                                   const double           Deflection,
                                   const double           Resolution,
                                   const bool             WithControl);
 
   //! Initialize the algorithms with <C>, <Deflection>, <UStep>,
   //! <Resolution> and <WithControl>
   Standard_EXPORT void Initialize(const Adaptor2d_Curve2d& C,
                                   const double             Deflection,
                                   const double             Resolution,
                                   const bool               WithControl);
 
   //! Initialize the algorithms with <C>, <Deflection>, <UStep>,
   //! <U1>, <U2> and <WithControl>
   Standard_EXPORT void Initialize(const Adaptor3d_Curve& C,
                                   const double           Deflection,
                                   const double           U1,
                                   const double           U2,
                                   const double           Resolution,
                                   const bool             WithControl);
 
   //! Initialize the algorithms with <C>, <Deflection>, <UStep>,
   //! <U1>, <U2> and <WithControl>
   Standard_EXPORT void Initialize(const Adaptor2d_Curve2d& C,
                                   const double             Deflection,
                                   const double             U1,
                                   const double             U2,
                                   const double             Resolution,
                                   const bool               WithControl);
 
   //! To know if all the calculus were done successfully
   //! (ie all the points have been computed). The calculus can fail if
   //! the Curve is not C1 in the considered domain.
   //! Returns True if the calculus was successful.
   bool IsAllDone() const;
 
   //! go to the next Point.
   void Next();
 
   //! returns True if it exists a next Point.
   Standard_EXPORT bool More();
 
   //! return the computed parameter
   double Value() const;
 
   //! return the computed parameter
   gp_Pnt Point() const;
 
 private:
   //! algorithm
   Standard_EXPORT void Perform();
 
   bool   myDone;
   bool   my3d;
   void*  myCurve;
   bool   myFinish;
   double myTolCur;
   bool   myControl;
   int    myIPoint;
   int    myNbPoints;
   double myParams[3];
   gp_Pnt myPoints[3];
   double myDwmax;
   double myDeflection;
   double myFirstParam;
   double myLastParam;
   double myDu;
 };
 
 #include <CPnts_UniformDeflection.lxx>
 
 #endif // _CPnts_UniformDeflection_HeaderFile

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