Method IsSimple

Namespace

GeometryHelper.Core

Assembly

GeometryHelper.dll

IsSimple(GeoPolygon3)

Checks whether a polygon is simple, using the default tolerance: no edge crosses or touches another except where neighbours share their vertex.

public static bool IsSimple(GeoPolygon3 polygon)

Parameters

polygon GeoPolygon3

Returns

bool

IsSimple(GeoPolygon3, Tolerance)

Checks whether a polygon is simple, within a tolerance: no edge crosses or touches another except where neighbours share their vertex.

public static bool IsSimple(GeoPolygon3 polygon, Tolerance tolerance)

Parameters

polygon GeoPolygon3

The polygon.

tolerance Tolerance

The tolerance: edges closer than the point tolerance count as touching.

Returns

bool

true if the polygon is simple; otherwise, false.

Remarks

GeoPolygon3 checks that it is flat but not that it is simple, because the check costs more than building it. A vertex touching another edge counts as not simple, and so does an edge folding back over its neighbour. Edges are swept in order along X, so the cost grows with the number of edges whose extents overlap rather than with the square of the edge count.

Exceptions

ArgumentNullException

Thrown when the polygon is null.