CreateCircularArc(Double,Double,Coordinate2D,Double,SpatialReference) Method

In This Topic

Convenience method to create a new instance of the EllipticArcSegment class. The segment will be a circular arc.

Syntax

C#
Visual Basic (Declaration)

public static EllipticArcSegment CreateCircularArc( 
   double startAngle,
   double centralAngle,
   Coordinate2D centerPt,
   double radius,
   SpatialReference spatialReference
)

Public Overloads Shared Function CreateCircularArc( _
   ByVal startAngle As Double, _
   ByVal centralAngle As Double, _
   ByVal centerPt As Coordinate2D, _
   ByVal radius As Double, _
   Optional ByVal spatialReference As SpatialReference _
) As EllipticArcSegment

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.

Return Value

An EllipticArcSegment

Exceptions

Exception	Description
System.ArgumentException	startAngle or centralAngle is NaN.
System.ArgumentException	centerPt is empty.

Example

Construct a Circular Arc - using a center point, angle and radius

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

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

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

// BuilderEx constructors don't need to run on the MCT.
EllipticArcBuilderEx cab = new EllipticArcBuilderEx(fromAngle, centralAngle, centerPt, radius, sr4326);
EllipticArcSegment otherCircularArc = cab.ToSegment();

Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.

Reference

EllipticArcBuilderEx Class
EllipticArcBuilderEx Members
Overload List

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