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 // Created on: 1996-02-21
 // Created by: Laurent PAINNOT
 // Copyright (c) 1996-1999 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 _Poly_PolygonOnTriangulation_HeaderFile
 #define _Poly_PolygonOnTriangulation_HeaderFile
 
 #include <Standard_NullObject.hxx>
 #include <Standard_Type.hxx>
 #include <Standard_Transient.hxx>
 #include <Standard_Integer.hxx>
 #include <NCollection_Array1.hxx>
 #include <NCollection_HArray1.hxx>
 
 //! This class provides a polygon in 3D space, based on the triangulation
 //! of a surface. It may be the approximate representation of a
 //! curve on the surface, or more generally the shape.
 //! A PolygonOnTriangulation is defined by a table of
 //! nodes. Each node is an index in the table of nodes specific
 //! to a triangulation, and represents a point on the surface. If
 //! the polygon is closed, the index of the point of closure is
 //! repeated at the end of the table of nodes.
 //! If the polygon is an approximate representation of a curve
 //! on a surface, you can associate with each of its nodes the
 //! value of the parameter of the corresponding point on the
 //! curve.represents a 3d Polygon
 class Poly_PolygonOnTriangulation : public Standard_Transient
 {
   DEFINE_STANDARD_RTTIEXT(Poly_PolygonOnTriangulation, Standard_Transient)
 public:
   //! Constructs a 3D polygon on the triangulation of a shape with specified size of nodes.
   Standard_EXPORT Poly_PolygonOnTriangulation(const int theNbNodes, const bool theHasParams);
 
   //! Constructs a 3D polygon on the triangulation of a shape,
   //! defined by the table of nodes, <Nodes>.
   Standard_EXPORT Poly_PolygonOnTriangulation(const NCollection_Array1<int>& Nodes);
 
   //! Constructs a 3D polygon on the triangulation of a shape, defined by:
   //! -   the table of nodes, Nodes, and the table of parameters, <Parameters>.
   //! where:
   //! -   a node value is an index in the table of nodes specific
   //! to an existing triangulation of a shape
   //! -   and a parameter value is the value of the parameter of
   //! the corresponding point on the curve approximated by
   //! the constructed polygon.
   //! Warning
   //! The tables Nodes and Parameters must be the same size.
   //! This property is not checked at construction time.
   Standard_EXPORT Poly_PolygonOnTriangulation(const NCollection_Array1<int>&    Nodes,
                                               const NCollection_Array1<double>& Parameters);
 
   //! Creates a copy of current polygon
   Standard_EXPORT virtual occ::handle<Poly_PolygonOnTriangulation> Copy() const;
 
   //! Returns the deflection of this polygon
   double Deflection() const { return myDeflection; }
 
   //! Sets the deflection of this polygon.
   //! See more on deflection in Poly_Polygones2D.
   void Deflection(const double theDefl) { myDeflection = theDefl; }
 
   //! Returns the number of nodes for this polygon.
   //! Note: If the polygon is closed, the point of closure is
   //! repeated at the end of its table of nodes. Thus, on a closed
   //! triangle, the function NbNodes returns 4.
   int NbNodes() const { return myNodes.Length(); }
 
   //! Returns node at the given index.
   int Node(int theIndex) const { return myNodes.Value(theIndex); }
 
   //! Returns mutable node-index array.
   NCollection_Array1<int>& ChangeNodeArray() { return myNodes; }
 
   //! Sets node at the given index.
   void SetNode(int theIndex, int theNode) { myNodes.SetValue(theIndex, theNode); }
 
   //! Returns true if parameters are associated with the nodes in this polygon.
   bool HasParameters() const { return !myParameters.IsNull(); }
 
   //! Returns parameter at the given index.
   double Parameter(int theIndex) const
   {
     Standard_NullObject_Raise_if(myParameters.IsNull(),
                                  "Poly_PolygonOnTriangulation::Parameter : parameters is NULL");
     return myParameters->Value(theIndex);
   }
 
   //! Sets parameter at the given index.
   void SetParameter(int theIndex, double theValue)
   {
     Standard_NullObject_Raise_if(myParameters.IsNull(),
                                  "Poly_PolygonOnTriangulation::Parameter : parameters is NULL");
     myParameters->SetValue(theIndex, theValue);
   }
 
   //! Returns mutable parameter array.
   NCollection_Array1<double>& ChangeParameterArray()
   {
     Standard_NullObject_Raise_if(myParameters.IsNull(),
                                  "Poly_PolygonOnTriangulation::Parameter : parameters is NULL");
     return myParameters->ChangeArray1();
   }
 
   //! Sets the table of the parameters associated with each node in this polygon.
   //! Raises exception if array size doesn't much number of polygon nodes.
   Standard_EXPORT void SetParameters(const occ::handle<NCollection_HArray1<double>>& theParameters);
 
   //! Dumps the content of me into the stream
   Standard_EXPORT virtual void DumpJson(Standard_OStream& theOStream, int theDepth = -1) const;
 
 public:
   //! Returns the table of nodes for this polygon.
   //! A node value is an index in the table of nodes specific to an existing triangulation of a
   //! shape.
   const NCollection_Array1<int>& Nodes() const { return myNodes; }
 
   //! Returns the table of the parameters associated with each node in this polygon.
   //! Warning! Use the function HasParameters to check if parameters are associated with the nodes
   //! in this polygon.
   const occ::handle<NCollection_HArray1<double>>& Parameters() const { return myParameters; }
 
   Standard_DEPRECATED("Deprecated method, SetNode() should be used instead")
   NCollection_Array1<int>& ChangeNodes() { return myNodes; }
 
   Standard_DEPRECATED("Deprecated method, SetParameter() should be used instead")
   NCollection_Array1<double>& ChangeParameters() { return myParameters->ChangeArray1(); }
 
 private:
   double                                   myDeflection;
   NCollection_Array1<int>                  myNodes;
   occ::handle<NCollection_HArray1<double>> myParameters;
 };
 
 #endif // _Poly_PolygonOnTriangulation_HeaderFile

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