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IMcRegionsFeatureFromPoint Method

Finds the index of the feature under a given point

Namespace:  MediaCy.IQL.Features
Assembly:  MediaCy.IQL.Features (in MediaCy.IQL.Features.dll) Version: 10.0.6912.0
Syntax
VB
Copy
Function FeatureFromPoint ( 
	x As Single,
	y As Single
) As Integer

Parameters

x
Type: SystemSingle
Text X pixel coordinate
y
Type: SystemSingle
Text Y pixel coordinate

Return Value

Type: Int32
The index of the feature under the given point, or -1 if there is no such feature.

Implements

IMcFeaturesFeatureFromPoint(Single, Single)
Remarks
The index of the feature under the given test point is returned. If no feature is under the given point, then -1 is returned. The PointClosestToPoint method is a more general form of this test that can identify near misses as well as direct hits on all or a selected subset of features. For McRegions the feature is found if the test point is on or interior to the boundary. For McRegions of Type other than mcftScanList, the computation assumes that the boundary was given as a non-self intersecting polygon. If multiple features enclose the test point (i.e., they are partially or completely nested), then the one with the lowest feature index will be returned. For McRegions of Type mcftScanList the test point is converted to the nearest whole pixel coordinate and the feature is considered found if that pixel is foreground in the scan list. For McLines, the first feature, if any, where the test point falls exactly on a feature line segment or vertex will be returned. For McPoints, the first point, if any, that is exactly equal to the test point is returned.
See Also