ArcGIS Developer Help

IConstructCircularArc.ConstructBearingRadiusAngle Method

Constructs an arc with the given chord bearing, radius and central angle.

[Visual Basic .NET]
Public Sub ConstructBearingRadiusAngle ( _
    ByVal startPoint As IPoint, _
    ByVal inAngle As Double, _
    ByVal isCCW As Boolean, _
    ByVal inRadius As Double, _
    ByVal CentralAngle As Double _
)

[C#]
public void ConstructBearingRadiusAngle (
    IPoint startPoint,
    double inAngle,
    bool isCCW,
    double inRadius,
    double CentralAngle
);

[C++]
HRESULT ConstructBearingRadiusAngle(
  IPoint* startPoint,
  double inAngle,
  VARIANT_BOOL isCCW,
  double inRadius,
  double CentralAngle
);

[C++]
Parameters
startPoint 

  startPoint is a parameter of type IPoint*
inAngle 

  inAngle is a parameter of type double
isCCW 

  isCCW is a parameter of type bool
inRadius 

  inRadius is a parameter of type double
CentralAngle 

  CentralAngle 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 Radius, and the desired Central Angle. The Bearing Angle and Central Angle are measured in radians. The Central Angle should not be greater than 2 * Pi.

Remarks

-isCCW stands for "is counter clockwise"

ConstructCircularArc Bearing Angle Example

[C#]

private void ConstructBearingRadiusAngle()
{
  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.ConstructBearingRadiusAngle(fromPoint, 0, true, 40, Math.PI);
   
  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 ConstructBearingRadiusAngle()
        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.ConstructBearingRadiusAngle(pFromPoint, 0, True, 40, Pi)

        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.ConstructBearingRadiusAngle Method

Product Availability

Description

Remarks

See Also