/usr/include/oce/Poly_Polygon2D.hxx is in liboce-foundation-dev 0.17.2-2.
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// this header file considered to be the "object code" form of the original source.
#ifndef _Poly_Polygon2D_HeaderFile
#define _Poly_Polygon2D_HeaderFile
#include <Standard.hxx>
#include <Standard_DefineHandle.hxx>
#include <Handle_Poly_Polygon2D.hxx>
#include <Standard_Real.hxx>
#include <TColgp_Array1OfPnt2d.hxx>
#include <MMgt_TShared.hxx>
#include <Standard_Integer.hxx>
class Standard_NullObject;
class TColgp_Array1OfPnt2d;
//! Provides a polygon in 2D space (for example, in the
//! parametric space of a surface). It is generally an
//! approximate representation of a curve.
//! A Polygon2D is defined by a table of nodes. Each node is
//! a 2D point. If the polygon is closed, the point of closure is
//! repeated at the end of the table of nodes.
class Poly_Polygon2D : public MMgt_TShared
{
public:
//! Constructs a 2D polygon defined by the table of points, <Nodes>.
Standard_EXPORT Poly_Polygon2D(const TColgp_Array1OfPnt2d& Nodes);
//! Returns the deflection of this polygon.
//! Deflection is used in cases where the polygon is an
//! approximate representation of a curve. Deflection
//! represents the maximum distance permitted between any
//! point on the curve and the corresponding point on the polygon.
//! By default the deflection value is equal to 0. An algorithm
//! using this 2D polygon with a deflection value equal to 0
//! considers that it is working with a true polygon and not with
//! an approximate representation of a curve. The Deflection
//! function is used to modify the deflection value of this polygon.
//! The deflection value can be used by any algorithm working with 2D polygons.
//! For example:
//! - An algorithm may use a unique deflection value for all
//! its polygons. In this case it is not necessary to use the
//! Deflection function.
//! - Or an algorithm may want to attach a different
//! deflection to each polygon. In this case, the Deflection
//! function is used to set a value on each polygon, and
//! later to fetch the value.
Standard_EXPORT Standard_Real Deflection() const;
//! Sets the deflection of this polygon to D
Standard_EXPORT void Deflection (const Standard_Real D) ;
//! Returns the number of nodes in 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.
Standard_Integer NbNodes() const;
//! Returns the table of nodes for this polygon.
Standard_EXPORT const TColgp_Array1OfPnt2d& Nodes() const;
DEFINE_STANDARD_RTTI(Poly_Polygon2D)
protected:
private:
Standard_Real myDeflection;
TColgp_Array1OfPnt2d myNodes;
};
#include <Poly_Polygon2D.lxx>
#endif // _Poly_Polygon2D_HeaderFile
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