ArcGIS Developer Help

IConstructCircularArc.ConstructEndPointsAngle Method

Constructs an arc from the given endpoints and central angle.

[Visual Basic .NET]
Public Sub ConstructEndPointsAngle ( _
    ByVal from As IPoint, _
    ByVal to As IPoint, _
    ByVal isCCW As Boolean, _
    ByVal CentralAngle As Double _
)

[C#]
public void ConstructEndPointsAngle (
    IPoint from,
    IPoint to,
    bool isCCW,
    double CentralAngle
);

[C++]
HRESULT ConstructEndPointsAngle(
  IPoint* from,
  IPoint* to,
  VARIANT_BOOL isCCW,
  double CentralAngle
);

[C++]
Parameters
from 

  from is a parameter of type IPoint*
to 

  to is a parameter of type IPoint*
isCCW 

  isCCW is a parameter of type bool
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, To Point, the desired orientation, and the desired Central Angle. The Central Angle is measured in radians.

Remarks

-isCCW stands for "is counter clockwise"

ConstructCircularArc EndPoint Example

[C#]

        private void ConstructEndPointsAngel()
        {
            IConstructCircularArc constructCircularArc = new CircularArcClass();
            ICircularArc circularArc = constructCircularArc as ICircularArc;
            IPoint fromPoint = new PointClass();
            IPoint toPoint = new PointClass();
            fromPoint.PutCoords(100, 100);
            toPoint.PutCoords(50, 50);

            constructCircularArc.ConstructEndPointsAngle(fromPoint, toPoint, true, 90);
            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 ConstructEndPointsAngle()
        Dim pConstructCircularArc As ESRI.ArcGIS.Geometry.IConstructCircularArc
        Dim pCArc As ESRI.ArcGIS.Geometry.ICircularArc
        Dim Pi As Double
        Dim pToPoint As ESRI.ArcGIS.Geometry.IPoint
        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
        pToPoint = New ESRI.ArcGIS.Geometry.Point
        pFromPoint.PutCoords(100, 100)
        pToPoint.PutCoords(50, 50)
        'The angles should be in Radians (Radians = Degrees * PI/180)
        pConstructCircularArc.ConstructEndPointsAngle(pFromPoint, pToPoint, True, 90 * Pi / 180)

        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.ConstructEndPointsAngle Method

Product Availability

Description

Remarks

See Also