EllipticArcBuilder Constructor(Double,Double,Coordinate2D,Double,SpatialReference)

Builds a new instance of the EllipticArcBuilder class. The new instance will be a circular arc. This method must be called on the MCT. Use QueuedTask.Run.

Syntax

C#
Visual Basic (Declaration)

public EllipticArcBuilder( 
   double startAngle,
   double centralAngle,
   Coordinate2D centerPt,
   double radius,
   SpatialReference spatialReference
)

Public Function New( _
   ByVal startAngle As Double, _
   ByVal centralAngle As Double, _
   ByVal centerPt As Coordinate2D, _
   ByVal radius As Double, _
   Optional ByVal spatialReference As SpatialReference _
)

Parameters

startAngle: The angle, measured from a horizontal line through the circular arc's center point, that defines where the arc starts.
centralAngle: The angle which describes the span of the circular arc.
centerPt: The center point of the embedded circle.
radius: The distance from the center of the embedded circle to the perimeter.
spatialReference: (Optional) The spatial reference of the arc. The default value is null.

Exceptions

Exception	Description
ArcGIS.Core.CalledOnWrongThreadException	This method or property must be called within the lambda passed to QueuedTask.Run.

Example

// Construct a circular arc with center point at (0, 0), from angle = 0, 
// central angle = pi/2, radius = 1.
// Use a builder convenience method or use a builder constructor.

SpatialReference sr4326 = SpatialReferences.WGS84;
Coordinate2D centerPt = new Coordinate2D(0, 0);
double fromAngle = 0;
double centralAngle = Math.PI / 2;
double radius = 1;

// Builder convenience methods don't need to run on the MCT.
EllipticArcSegment circularArc = EllipticArcBuilder.CreateEllipticArcSegment(fromAngle, centralAngle, centerPt, radius, sr4326);

// Builder constructors need to run on the MCT.
ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
{
  using (EllipticArcBuilder cab = new EllipticArcBuilder(fromAngle, centralAngle, centerPt, radius, sr4326))
  {
    // do something with the builder

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

Requirements

Target Platforms: Windows 10, Windows 8.1

Reference

EllipticArcBuilder Class
EllipticArcBuilder Members
Overload List