EllipticArcBuilder Constructor(MapPoint,MapPoint,Coordinate2D)

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

Syntax

C#
Visual Basic (Declaration)

public EllipticArcBuilder( 
   MapPoint startPt,
   MapPoint endPt,
   Coordinate2D interiorPt
)

Public Function New( _
   ByVal startPt As MapPoint, _
   ByVal endPt As MapPoint, _
   ByVal interiorPt As Coordinate2D _
)

Parameters

startPt: The point from which the arc starts.
endPt: The point to which the arc ends.
interiorPt: An interior point of the arc.

Exceptions

Exception	Description
System.InvalidOperationException	Incompatible spatial references. The spatial reference of the MapPoints do not match.
ArcGIS.Core.CalledOnWrongThreadException	This method or property must be called within the lambda passed to QueuedTask.Run.
System.ArgumentNullException	startPt or endPt is null.

Example

// Construct a circular arc from (2, 1) to (1, 2) with interior pt (1 + sqrt(2)/2, 1 + sqrt(2)/2).
// Use a builder convenience method or use a builder constructor.

MapPoint fromPt = MapPointBuilder.CreateMapPoint(2, 1);
MapPoint toPt = MapPointBuilder.CreateMapPoint(1, 2);
Coordinate2D interiorPt = new Coordinate2D(1 + Math.Sqrt(2) / 2, 1 + Math.Sqrt(2) / 2);

// Builder convenience methods don't need to run on the MCT.
EllipticArcSegment circularArc = EllipticArcBuilder.CreateEllipticArcSegment(fromPt, toPt, interiorPt);

// Builder constructors need to run on the MCT.
ArcGIS.Desktop.Framework.Threading.Tasks.QueuedTask.Run(() =>
{
  using (EllipticArcBuilder cab = new EllipticArcBuilder(fromPt, toPt, interiorPt))
  {
    // do something with the builder

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

Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 7

Reference

EllipticArcBuilder Class
EllipticArcBuilder Members
Overload List