Provides access to members that locate a part of a geometry closest to a point.
Members
| Name | Description | |
|---|---|---|
 |
HitTest | Locates a part of a geometry closest to a query point. Any located part must be within searchRadius units from the query point. |
IHitTest.HitTest Method
Locates a part of a geometry closest to a query point. Any located part must be within searchRadius units from the query point.
Public Function HitTest ( _
ByVal QueryPoint As IPoint, _
ByVal searchRadius As Double, _
ByVal geometryPart As esriGeometryHitPartType, _
ByVal hitPoint As IPoint, _
ByRef hitDistance As Double, _
ByRef hitPartIndex As Integer, _
ByRef hitSegmentIndex As Integer, _
ByRef bRightSide As Boolean _
) As Boolean
public bool HitTest (
IPoint QueryPoint,
double searchRadius,
esriGeometryHitPartType geometryPart,
IPoint hitPoint,
ref double hitDistance,
ref int hitPartIndex,
ref int hitSegmentIndex,
ref bool bRightSide
);
Remarks
The segment index returned has different meanings depending on the esriGeometryHitPartType used (Please see the example for more details).
EsriGeometryPartVertex: returns a vertex index
EsriGeometryPartBoundary, esriGeometryPartMidpoint and esriGeometryPartEndpoint: return a segment index
EsriGeometryPartCentroid: Always returns 0 for the part index and the segment index.
brightside: Indicates if the input point is on the right side of the input geometry
Note: The distance units use in this method are the units of the input geometry. No conversion is performed. esriGeometryHitPartType parameter cannot be a combination of several esriGeometryHitPartTypes.
Classes that implement IHitTest
| Classes | Description |
|---|---|
| Envelope | A rectangle with sides parallel to a coordinate system defining the extent of another geometry; optionally has min and max measure, height and ID attributes. |
| MultiPatch | A collection of surface patches. |
| Multipoint | An ordered collection of points; optionally has measure, height and ID attributes. |
| Point | A two dimensional point, optionally with measure, height, and ID attributes. |
| Polygon | A collection of rings ordered by their containment relationship; optionally has measure, height and ID attributes. |
| Polyline | An ordered collection of paths; optionally has measure, height and ID attributes. |