ArcObjects Library Reference (Geometry)

IConstructCircularArc.ConstructBearingChordArc Method

Constructs an arc with the given chord bearing, chord distance and arc distance (negative for clockwise orientation).

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

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

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

[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
arcDistance 
  arcDistance 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 CircularArc Length. The Bearing Angle is measured in radians. The Chord Distance must be less than the Arc Distance, otherwise an error is returned.

Remarks

-isCCW stands for "is counter clockwise"

ConstructCircularArc Bearing Angle Example

[C#]

private void ConstructBearingChordArc()
{
  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.ConstructBearingChordArc(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 ConstructBearingChordArc()
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.ConstructBearingChordArc(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.ConstructBearingChordArc Method

Product Availability

Description

Remarks

See Also