StartAngle Property (EllipticArcBuilderEx)

In This Topic

Gets or sets the start angle in radians.

Syntax

C#
Visual Basic (Declaration)

public double StartAngle {get; set;}

Public Property StartAngle As Double

Property Value

A double representing the start angle.

Exceptions

Exception	Description
System.ArgumentException	The StartAngle is NaN.

Remarks

The start angle is the angle of the line defined by the CenterPoint and the StartPoint. If RotationAngle != 0, then the start angle is relative to the rotated SemiMajorAxis rather than the X-axis. The start angle is is measured in radians and is always between -PI and +PI. Changing the start angle may also change the start point and central angle.

Example

Elliptic Arc Builder Properties

// retrieve the curve's properties
EllipticArcBuilderEx builder = new EllipticArcBuilderEx(arcSegment);
MapPoint startPt = builder.StartPoint;
MapPoint endPt = builder.EndPoint;
Coordinate2D centerPt = builder.CenterPoint;
bool isCircular = builder.IsCircular;
bool isMinor = builder.IsMinor;
double startAngle = builder.StartAngle;
double endAngle = builder.EndAngle;
double centralAngle = builder.CentralAngle;
double rotationAngle = builder.RotationAngle;
ArcOrientation orientation = builder.Orientation;

Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.

Reference

EllipticArcBuilderEx Class
EllipticArcBuilderEx Members

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