ArcObjects Library Reference (Geometry)

IConstructCircularArc.ConstructBearingArcTangent Method

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

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

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

[C++]
HRESULT ConstructBearingArcTangent(
  IPoint* from,
  double inAngle,
  VARIANT_BOOL isCCW,
  double arcDistance,
  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
arcDistance 
  arcDistance 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 CircularArc Length, and the desired Tangent Distance. The Bearing Angle is measured in radians. The Tangent Distance must be greater than half the Arc Distance, otherwise an error is returned.

Remarks

-isCCW stands for "is counter clockwise"

ConstructCircularArc Bearing Angle Example

[C#]

private void ConstructBearingArcTangent()
{
  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.ConstructBearingArcTangent(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 ConstructBearingArcTangent()
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.ConstructBearingArcTangent(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.ConstructBearingArcTangent Method

Product Availability

Description

Remarks

See Also