ArcObjects Library Reference (Geometry)

IConstructCircularArc.ConstructBearingChordTangent Method

Constructs an arc with the given chord bearing, chord distance and tangent distance.

[Visual Basic .NET]
Public Sub ConstructBearingChordTangent ( _
    ByVal from As IPoint, _
    ByVal inAngle As Double, _
    ByVal isCCW As Boolean, _
    ByVal chordDistance As Double, _
    ByVal tangentDistance As Double _
)

[C#]
public void ConstructBearingChordTangent (
    IPoint from,
    double inAngle,
    bool isCCW,
    double chordDistance,
    double tangentDistance
);

[C++]
HRESULT ConstructBearingChordTangent(
  IPoint* from,
  double inAngle,
  VARIANT_BOOL isCCW,
  double chordDistance,
  double tangentDistance
);

[C++]

Parameters
from 

  from is a parameter of type IPoint
inAngle 
  inAngle is a parameter of type double
isCCW 
  isCCW is a parameter of type VARIANT_BOOL
chordDistance 
  chordDistance is a parameter of type double
tangentDistance 
  tangentDistance is a parameter of type double

Product Availability

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

Description

Constructs a CircularArc given the From Point, the Bearing Angle, the desired orientation, the desired Chord Distance, and the desired Tangent Distance. The Bearing Angle is measured in radians. The Tangent Distance must be greater than half the Chord Distance, otherwise an error is returned.

Remarks

-isCCW stands for "is counter clockwise"

ConstructCircularArc Bearing Angle Example

[C#]

private void ConstructBearingChordTangent()
{
  IConstructCircularArc constructCircularArc=new CircularArcClass();
  ICircularArc circularArc=constructCircularArc as ICircularArc;
  
  IPoint fromPoint=new PointClass();
  fromPoint.PutCoords(100, 100);
 
  //The angles should be in Radians (Radians=Degrees * PI/180)
  constructCircularArc.ConstructBearingChordTangent(fromPoint, 0, true, 100, 300);
   
  String report="Length : " + circularArc.Length + "\n" +
                  "Radius : " + circularArc.Radius + "\n" +
                  "Chord Height : " + circularArc.ChordHeight + "\n" +
                  "Central Angle (Rad) : " + circularArc.CentralAngle + "\n" +
                  "From Angle (Rad) : " + circularArc.FromAngle + "\n" +
                  "To Angle (Rad) : " + circularArc.ToAngle + "\n" +
                  "Center Point : " + circularArc.CenterPoint.X + " , " + circularArc.CenterPoint.Y + "\n" +
                  "From Point : " + circularArc.FromPoint.X + " , " + circularArc.FromPoint.Y + "\n" +
                  "To Point : " + circularArc.ToPoint.X + " , " + circularArc.ToPoint.Y;
  System.Windows.Forms.MessageBox.Show(report);
}

[Visual Basic .NET]

    Private Sub ConstructBearingChordTangent()
        Dim pConstructCircularArc As ESRI.ArcGIS.Geometry.IConstructCircularArc
        Dim pCArc As ESRI.ArcGIS.Geometry.ICircularArc
        Dim Pi As Double
        Dim pFromPoint As ESRI.ArcGIS.Geometry.IPoint

        pConstructCircularArc=New ESRI.ArcGIS.Geometry.CircularArc
        pCArc=pConstructCircularArc
        Pi=4 * Math.Atan(1) 'Calculate the value of pi.
        pFromPoint=New ESRI.ArcGIS.Geometry.Point
        pFromPoint.PutCoords(100, 100)
        'The angles should be in Radians (Radians=Degrees * PI/180)
        pConstructCircularArc.ConstructBearingChordTangent(pFromPoint, 0, True, 100, 300)

        Debug.Print("Length : " & pCArc.Length)
        Debug.Print("Radius : " & pCArc.Radius)
        Debug.Print("Chord Height : " & pCArc.ChordHeight)
        Debug.Print("Central Angle (Rad) : " & pCArc.CentralAngle)
        Debug.Print("From Angle (Rad) : " & pCArc.FromAngle)
        Debug.Print("To Angle (Rad) : " & pCArc.ToAngle)
        Debug.Print("Center Point : " & pCArc.CenterPoint.X & " , " & pCArc.CenterPoint.Y)
        Debug.Print("From Point : " & pCArc.FromPoint.X & " , " & pCArc.FromPoint.Y)
        Debug.Print("To Point : " & pCArc.ToPoint.X & " , " & pCArc.ToPoint.Y)
    End Sub

IConstructCircularArc.ConstructBearingChordTangent Method

Product Availability

Description

Remarks

See Also