ArcObjects Library Reference (Geometry)  

ICurve.QueryNormal Method

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

[Visual Basic .NET]
Public Sub QueryNormal ( _
    ByVal extension As esriSegmentExtension, _
    ByVal DistanceAlongCurve As Double, _
    ByVal asRatio As Boolean, _
    ByVal Length As Double, _
    ByVal normal As ILine _
)
[C#]
public void QueryNormal (
    esriSegmentExtension extension,
    double DistanceAlongCurve,
    bool asRatio,
    double Length,
    ILine normal
);
[C++]
HRESULT QueryNormal(
  esriSegmentExtension extension,
  double DistanceAlongCurve,
  VARIANT_BOOL asRatio,
  double Length,
  ILine* normal
);
[C++]

Parameters

extension

  extension is a parameter of type esriSegmentExtension

DistanceAlongCurve   DistanceAlongCurve is a parameter of type double asRatio   asRatio is a parameter of type VARIANT_BOOL Length   Length is a parameter of type double normal

  normal is a parameter of type ILine

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Description

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

Remarks

 

QueryNormal Example

See Also

ICurve Interface | ILine Interface