EllipticArcBuilderEx Constructor(Coordinate2D,Double,ArcOrientation,SpatialReference)

In This Topic

Creates a new instance of the EllipticArcBuilderEx class. The new instance will be a circle from a center point and radius.

Syntax

C#
Visual Basic (Declaration)

public EllipticArcBuilderEx( 
   Coordinate2D centerPt,
   double radius,
   ArcOrientation orientation,
   SpatialReference spatialReference
)

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

Parameters

centerPt: The center of the circle.
radius: The radius of the circle.
orientation: The orientation of the arc, clockwise or counterclockwise.
spatialReference: (Optional) The spatial reference of the arc. The default value is null.

Exceptions

Exception	Description
System.ArgumentException	radius is NaN.
System.ArgumentException	centerPt is empty.

Example

Construct a Circle

// Construct a circle with center at (-1,-1), radius = 2, and oriented clockwise.
// Use a builderEx convenience method or use a builderEx constructor.

Coordinate2D centerPtCoord = new Coordinate2D(-1, -1);

// Builder convenience methods don't need to run on the MCT.
EllipticArcSegment circle = EllipticArcBuilderEx.CreateCircle(centerPtCoord, 2, ArcOrientation.ArcClockwise);
// circle.IsCircular = true
// circle.IsCounterClockwise = false
// circle.IsMinor = false

double startAngle, rotationAngle, centralAngle, semiMajor, semiMinor;
Coordinate2D actualCenterPt;
circle.QueryCoords(out actualCenterPt, out startAngle, out centralAngle, out rotationAngle, out semiMajor, out semiMinor);

// semiMajor = 2.0
// semiMinor = 2.0
// startAngle = PI/2
// centralAngle = -2*PI
// rotationAngle = 0
// endAngle = PI/2

// BuilderEx constructors need to run on the MCT.
EllipticArcBuilderEx builder = new EllipticArcBuilderEx(centerPtCoord, 2, ArcOrientation.ArcClockwise);
EllipticArcSegment otherCircle = builder.ToSegment();

Requirements

Target Platforms: Windows 11, Windows 10, Windows 8.1

Reference

EllipticArcBuilderEx Class
EllipticArcBuilderEx Members
Overload List

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