Intersects Method (IGeometryEngine)

In This Topic

Returns true if geometry1 and geometry2 intersect.

Syntax

C#
Visual Basic (Declaration)

bool Intersects( 
   Geometry geometry1,
   Geometry geometry2
)

Function Intersects( _
   ByVal geometry1 As Geometry, _
   ByVal geometry2 As Geometry _
) As Boolean

Parameters

geometry1: The base geometry.
geometry2: The comparison geometry.

Return Value

True if the two geometries intersect.

Exceptions

Exception	Description
System.ArgumentNullException	Either geometry1 or geometry2 or both are null or empty.
System.NotImplementedException	The method is not implemented for GeometryBag.
System.InvalidOperationException	Incompatible spatial references between the input geometries.

Remarks

Two geometries intersect if they have at least one point in common. Equivalent to not Disjoint.

Example

Intersection between two Polylines

// determine intersection between two polylines

List<MapPoint> pts = new List<MapPoint>();
pts.Add(MapPointBuilderEx.CreateMapPoint(1.0, 1.0));
pts.Add(MapPointBuilderEx.CreateMapPoint(3.0, 3.0));
pts.Add(MapPointBuilderEx.CreateMapPoint(5.0, 1.0));

Polyline line1 = PolylineBuilderEx.CreatePolyline(pts);

List<MapPoint> pts2 = new List<MapPoint>();
pts2.Add(MapPointBuilderEx.CreateMapPoint(1.0, 3.0));
pts2.Add(MapPointBuilderEx.CreateMapPoint(3.0, 1.0));
pts2.Add(MapPointBuilderEx.CreateMapPoint(5.0, 3.0));

Polyline line2 = PolylineBuilderEx.CreatePolyline(pts2);

bool intersects = GeometryEngine.Instance.Intersects(line1, line2);    // intersects = true
Geometry g = GeometryEngine.Instance.Intersection(line1, line2, GeometryDimensionType.EsriGeometry0Dimension);
Multipoint resultMultipoint = g as Multipoint;

// result is a multiPoint that intersects at (2,2) and (4,2)

Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

Reference

IGeometryEngine Interface
IGeometryEngine Members

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