meshkernel::PolygonalEnclosure Class Reference

A region enclosed by a polygonal permieter. More...

#include <PolygonalEnclosure.hpp>

Public Types
enum class	Region { None , Exterior , Interior }
	The part of the enclosure a point is found. More...

Public Member Functions
	PolygonalEnclosure (const std::vector< Point > &points, Projection projection)
	Constructor.
const Polygon &	Outer () const
	The outer perimeter polygon.
UInt	NumberOfInner () const
	The number of inner hole regions.
const Polygon &	Inner (size_t i) const
	Get an inner polygon.
UInt	GetNumberOfNodes () const
	Get the number of nodes in the enclosure, both outer and all inner polygons.
bool	Contains (const Point &pnt) const
	Determine if the point lies in the polygon.
Region	ContainsRegion (const Point &pnt) const
	Determine in which part of the enclosure the point is.
UInt	NumberOfPoints (const bool includeInterior) const
	Get the number of points making up the polygon, including interior if requested.
void	SnapToLandBoundary (size_t startIndex, size_t endIndex, const LandBoundary &landBoundary)
	Snap all or part of the outer perimeter polygon to the land boundary.
std::vector< Point >	Refine (UInt startIndex, UInt endIndex, double refinementDistance) const
	Refine the polygon.
std::vector< Point >	LinearRefine (UInt startIndex, UInt endIndex) const
	Linear refine the outer polygon.
std::tuple< std::unique_ptr< PolygonalEnclosure >, std::unique_ptr< PolygonalEnclosure > >	OffsetCopy (double distance, bool outwardsAndInwards) const
	Makes a new polygonal enclosure from an existing one, by offsetting it by a distance (copypol)

Detailed Description

A region enclosed by a polygonal permieter.

Each region is described by an outer perimeter polygon. It may contain 0 or more holes, each described by an inner polygon.

Member Enumeration Documentation

Region

enum class meshkernel::PolygonalEnclosure::Region

strong

The part of the enclosure a point is found.

Enumerator
None	The point is not contained with the enclosure.
Exterior	The point is contained within the outer perimeter of the enclosure.
Interior	The point is contained within one of the island, interior perimeters of the enclosure.

Member Function Documentation

Contains()

bool meshkernel::PolygonalEnclosure::Contains

(

const Point &

pnt

)

const

Determine if the point lies in the polygon.

If the point lies within the outer polygon but outside any inner polygons

GetNumberOfNodes()

UInt meshkernel::PolygonalEnclosure::GetNumberOfNodes

(

)

const

Get the number of nodes in the enclosure, both outer and all inner polygons.

Note

Does not include any separator nodes

LinearRefine()

std::vector< Point > meshkernel::PolygonalEnclosure::LinearRefine	(	UInt	startIndex,
		UInt	endIndex
	)		const

Linear refine the outer polygon.

Parameters

[in]	startIndex	The start index of the sections to be refined
[in]	endIndex	The end index of the sections to be refined

Returns

Points making the polygon with the sections indicated refined.

OffsetCopy()

std::tuple< std::unique_ptr< PolygonalEnclosure >, std::unique_ptr< PolygonalEnclosure > > meshkernel::PolygonalEnclosure::OffsetCopy	(	double	distance,
		bool	outwardsAndInwards
	)		const

Makes a new polygonal enclosure from an existing one, by offsetting it by a distance (copypol)

Parameters

[in]	distance	The offset distance
[in]	outwardsAndInwards	Offset outwards only or both outwards and inwards

Note

Order of result is outward offset first, inward offset second, this may be nullptr.

Returns

The new offset polygon(s), may be nullptr if outwardsAndInwards is false, i.e. only outwards required.

Refine()

std::vector< Point > meshkernel::PolygonalEnclosure::Refine	(	UInt	startIndex,
		UInt	endIndex,
		double	refinementDistance
	)		const

Refine the polygon.

Parameters

[in]	startIndex	The start index of the sections to be refined
[in]	endIndex	The end index of the sections to be refined
[in]	refinementDistance	The maximum distance between points.

Returns

Points making the polygon with the sections indicated refined.

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The documentation for this class was generated from the following file:

• /home/runner/work/MeshKernel/MeshKernel/libs/MeshKernel/include/MeshKernel/PolygonalEnclosure.hpp