This class provides utility methods for Observable instance for PolylineRing. More...

#include <luciad/geometries/observable/ObservablePolylineRingUtil.h>

Public Member Functions
	ObservablePolylineRingUtil ()=delete

Static Public Member Functions
static std::shared_ptr< Observable< std::shared_ptr< Point > > >	derivePointAtIndex (const std::shared_ptr< Observable< std::shared_ptr< PolylineRing > > > &observablePolylineRing, size_t index)
	Derives an `Observable` `Point` from the given observable polyline ring that represents the point at the given index. More...

static std::shared_ptr< Observable< std::shared_ptr< Point > > >	derivePointOnSegment (const std::shared_ptr< Observable< std::shared_ptr< PolylineRing > > > &observablePolylineRing, size_t segmentIndex, double parameter)
	Derives an `Observable` `Point` from the given observable polyline ring that represents a point on a segment of the polyline ring. More...

Detailed Description

This class provides utility methods for Observable instance for PolylineRing.

Constructor & Destructor Documentation

luciad::ObservablePolylineRingUtil::ObservablePolylineRingUtil ( )

delete

static std::shared_ptr< Observable< std::shared_ptr< Point > > > luciad::ObservablePolylineRingUtil::derivePointAtIndex	(	const std::shared_ptr< Observable< std::shared_ptr< PolylineRing > > > &	observablePolylineRing,
		size_t	index
	)

static

Derives an Observable Point from the given observable polyline ring that represents the point at the given index.

This observable point will be updated when the given observable polyline ring changes.

Notes:

When the observable polyline ring contains a nullptr value, the observable point instance will contain a nullptr value too.
When the given index >= point count, the observable point instance will contain a nullptr value.
Observable::setValue will throw an exception for derived instances.

Parameters

observablePolylineRing	an observable polyline ring from which to derive the point
index	the point index

static std::shared_ptr< Observable< std::shared_ptr< Point > > > luciad::ObservablePolylineRingUtil::derivePointOnSegment	(	const std::shared_ptr< Observable< std::shared_ptr< PolylineRing > > > &	observablePolylineRing,
		size_t	segmentIndex,
		double	parameter
	)

static

Derives an Observable Point from the given observable polyline ring that represents a point on a segment of the polyline ring.

This observable point will be updated when the given observable polyline ring changes.

Notes:

When the observable polyline ring contains a nullptr value, the observable point instance will contain a nullptr value too.
When the given segmentIndex >= point count, the observable point instance will contain a nullptr value.
Observable::setValue will throw an exception for derived instances.

Parameters

observablePolylineRing	an observable polyline ring from which to derive the point
segmentIndex	a segment index: a value between [0, pointCount - 2]. For example: segment index 0 corresponds with the segment between the points with index 0 and 1.
parameter	a parameter value between [0, 1] that determines which point of the segment is chosen. This can for example be 0.5, to get the middle of the segment