Struct PolygonHandle

Namespace

LansMap.Lines

Assembly

LansMap.Runtime.dll

A live reference to one polygon in a specific PolygonLayer's store: the layer plus the id its AddPolygon(int, Color32) returned for it.

public readonly struct PolygonHandle

Inherited Members

ValueType.Equals(object)

ValueType.GetHashCode()

ValueType.ToString()

Remarks

Every member here is a single PolygonStore call; the struct holds no state of its own. A caller whose ring is recomputed every frame from live state calls SetPositions(IReadOnlyList<LatLon>) each frame instead of removing and re-adding, the same reason SetPositions(IReadOnlyList<LatLon>) exists.

Properties

Color

Fill color.

public Color32 Color { get; set; }

Property Value

Color32

Id

The id the layer's Add call returned for this polygon.

public int Id { get; }

Property Value

int

IsLive

False after removal; every other member is a no-op read or write then.

public bool IsLive { get; }

Property Value

bool

LastRefusal

Why the last SetPositions(IReadOnlyList<LatLon>) call was refused; None when it was accepted or the polygon has never been rewritten since add.

public PolygonStore.Rejection LastRefusal { get; }

Property Value

PolygonStore.Rejection

Layer

The layer this polygon lives in.

public PolygonLayer Layer { get; }

Property Value

PolygonLayer

PointCount

Ring vertices currently drawn; 0 while hidden.

public int PointCount { get; }

Property Value

int

Methods

SetPositions(IReadOnlyList<LatLon>)

Rewrites the polygon's ring, latitude first, degrees WGS84. Fewer than three points hides the polygon; a self-intersecting or zero-area ring keeps the previous fill and sets LastRefusal.

public void SetPositions(IReadOnlyList<LatLon> points)

Parameters

points IReadOnlyList<LatLon>