ArcGIS Enterprise SDK
ICurve.QueryTangent Method
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ICurve.QueryTangent Method

Constructs a line tangent to a curve from a point at a specified distance along the curve.

[Visual Basic .NET]
Public Sub QueryTangent ( _
    ByVal extension As esriSegmentExtension, _
    ByVal DistanceAlongCurve As Double, _
    ByVal asRatio As Boolean, _
    ByVal Length As Double, _
    ByVal tangent As ILine _
public void QueryTangent (
    esriSegmentExtension extension,
    double DistanceAlongCurve,
    bool asRatio,
    double Length,
    ILine tangent


Given a distance along the curve specified either as a ratio of the length or as a specific fixed distance, QueryTangent returns the Line tangent to the Point.  The length and method of tangential extension of the tangent line are given by the user.  The method of tangential extension determines the direction of the tangent line as though it were being extended at a From point or a To point.



QueryTangent Example

See Also

ICurve Interface