CreateEllipticArcSegment(Coordinate2D,Double,Double,Double,Double,Double,SpatialReference) Method

Convenience method to create a new instance of the EllipticArcSegment class.

Syntax

C#
Visual Basic (Declaration)

public static EllipticArcSegment CreateEllipticArcSegment( 
   Coordinate2D centerPt,
   double startAngle,
   double centralAngle,
   double rotationAngle,
   double semiMajorAxis,
   double minorMajorRatio,
   SpatialReference spatialReference
)

Public Overloads Shared Function CreateEllipticArcSegment( _
   ByVal centerPt As Coordinate2D, _
   ByVal startAngle As Double, _
   ByVal centralAngle As Double, _
   ByVal rotationAngle As Double, _
   ByVal semiMajorAxis As Double, _
   ByVal minorMajorRatio As Double, _
   Optional ByVal spatialReference As SpatialReference _
) As EllipticArcSegment

Parameters

centerPt: The center point of the ellipse.
startAngle: The start angle in radians measured from the rotated x-axis.
centralAngle: The central angle in radians measuring the span of the arc from startAngle to endAngle. A positive value corresponds to counterclockwise orientation.
rotationAngle: The angle in radians by which the ellipse is rotated from the x-axis. A positive value corresponds to counterclockwise rotation.
semiMajorAxis: The length of the semi-major axis.
minorMajorRatio: The ratio of the length of the semi-minor axis to the length of the semi-major axis.
spatialReference: (Optional) The spatial reference of the arc. The default value is null.

Return Value

An EllipticArcSegment

Example

// Construct an elliptic arc centered at (1,1), startAngle = 0, centralAngle = PI/2, 
// rotationAngle = 0, semiMajorAxis = 1, minorMajorRatio = 0.5.
// Use a builder convenience method or use a builder constructor.

Coordinate2D centerPt = new Coordinate2D(1, 1);

// Builder convenience methods don't need to run on the MCT.
EllipticArcSegment circularArc = EllipticArcBuilder.CreateEllipticArcSegment(centerPt, 0, Math.PI / 2, 0, 1, 0.5);

double semiMajor;
double semiMinor;
circularArc.GetAxes(out semiMajor, out semiMinor);
// semiMajor = 1, semiMinor = 0.5

// Builder constructors need to run on the MCT.
ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
{
  using (EllipticArcBuilder cab = new EllipticArcBuilder(centerPt, 0, Math.PI / 2, 0, 1, 0.5))
  {
    // do something with the builder

    EllipticArcSegment otherCircularArc = cab.ToSegment();
  }
});

Requirements

Target Platforms: Windows 10, Windows 8.1

Reference

EllipticArcBuilder Class
EllipticArcBuilder Members
Overload List