# EllipticArcSegment QML Type

• Esri.ArcGISRuntime
• EllipticArcSegment
• An elliptic arc segment for use in a multipart geometry. More...

 Import Statement: import Esri.ArcGISRuntime Since: Esri.ArcGISRuntime 100.12 Inherits: Segment

## Detailed Description

Note: A component of this type cannot be declared in QML code; however, a new EllipticArcSegment can be created via the Factory class.

An elliptic arc is the portion of the boundary of a 2D ellipse that connects two points.

## Property Documentation

The center point of the ellipse that this segment is defined on (read-only).

The parametric angle in radians measuring the span of the arc from startAngle to endAngle (read-only).

A positive value corresponds to a counterclockwise arc sweep.

This value is always between -2*PI and 2*PI, these limits indicating this arc forms a complete ellipse in either clockwise or counterclockwise direction.

Indicates if this arc is a portion of the boundary of a 2D circle (read-only).

An elliptic arc is circular if the ellipse on which it is based is a circle, meaning the lengths of its major and minor axes are equal.

Use createCircularEllipticArcWithCenterRadiusAndAngles(Point, double, double, double, SpatialReference) and createCircularEllipticArcWithStartEndAndInterior(Point, Point, Point, SpatialReference) to create circular arcs.

Indicates if the direction of the segment, from start point to end point, proceeds in a counterclockwise direction (read-only).

The parametric angle in radians of the end of the arc relative to the major axis of the embedded ellipse (read-only).

A positive value corresponds to a counterclockwise rotation from the major axis.

The ratio of the length of the semi-minor axis to the semi-major axis (read-only).

The angle in radians by which the major axis of the ellipse this segment is based on is rotated from the x-axis (read-only).

The length of the longer of the two axes of the ellipse on which this arc is based (read-only).

The semi-major axis always lies on the line between `0` and PI radians.

The length of the shorter of the two axes of the ellipse on which this arc is based (read-only).

The semi-minor axis always lies on the line between PI/`2` and 3*PI/`2` radians.

The parametric angle in radians of the start of the arc relative to the major axis of the embedded ellipse (read-only).

A positive value corresponds to a counterclockwise rotation from the major axis.

## Method Documentation

Creates an EllipticArcSegment that is a partial circle shape from the center point and radius of the embedded circle, and the start and central angle around that circle.

• centerPoint - The center point of the embedded circle
• radius - The distance from the center of the embedded circle to its perimeter
• startAngle - The parametric angle in radians of the start of the arc relative to the major axis of the embedded ellipse
• centralAngle - The parametric angle in radians measuring the span of the arc from startAngle to endAngle
• spatialReference - The spatial reference of the new segment

The z-value and m-value of the center point (if present) are ignored. Use createCircularEllipticArcWithStartEndAndInterior(Point, Point, Point, SpatialReference) to create a circular EllipticArcSegment with end points with z and/or m values.

This method can only be accessed via the Factory object.

 EllipticArcSegment createCircularEllipticArcWithStartEndAndInterior(Point startPoint, Point endPoint, Point interiorPoint, SpatialReference spatialReference)

Creates an EllipticArcSegment from start, end, and interior points that is a partial circle shape.

• startPoint - The start point of the segment
• endPoint - The end point of the segment
• interiorPoint - A point along the circular arc, between the start and end points
• spatialReference - The spatial reference of the new segment

The z-value and m-value of the start and end points (if present) are used in the circular EllipticArcSegment. The z-value and m-value of the interior point (if present) are ignored.

This method can only be accessed via the Factory object.

 EllipticArcSegment createEllipticArcWithCenter(Point centerPoint, double rotationAngle, double semiMajorAxis, double minorMajorRatio, double startAngle, double centralAngle, SpatialReference spatialReference)

Creates an elliptic arc based on parameters that define an ellipse and the portion of that ellipse that defines the arc.

• centerPoint - The center point of the embedded ellipse
• rotationAngle - The angle in radians by which the major axis of the embedded ellipse is rotated from the x-axis. A positive value corresponds to a counterclockwise rotation from the x-axis. The value is taken in form of the modulo of 2 * PI (360 degrees); for example an input rotation angle of 7.5 radians (430 degrees) would return a segment with a rotation angle of 1.22 radians (70 degrees).
• semiMajorAxis - The length of the semi-major axis of the embedded ellipse in the units of the spatial reference
• minorMajorRatio - The ratio of the length of the semi-minor axis to the length of the semi-major axis of the embedded ellipse
• startAngle - The parametric angle in radians of the start of the arc relative to the major axis of the embedded ellipse. A positive value corresponds to a counterclockwise rotation from the major axis. The value is taken in form of the modulo of 2 * PI (360 degrees); for example an input rotation angle of 7.5 radians (430 degrees) would return a segment with a rotation angle of 1.22 radians (70 degrees).
• centralAngle - The parametric angle in radians measuring the span of the arc from startAngle to endAngle. A positive value corresponds to a counterclockwise arc sweep. Values larger than 2 * PI (360 degrees) return a segment with a central angle of exactly 2 * PI (360 degrees), resulting in a full ellipse where the start and end points are identical.
• spatialReference - A spatial reference to use for the segment if the center point parameter does not have a spatial reference set

The spatial reference parameter is used if the center point parameter has a `null` spatial reference. If both spatial references are supplied, they must be equal.

The z-value and m-value of the center point (if present) are ignored. Use createEllipticArcWithStartAndEndpoints(Point, Point, double, bool, bool, double, double, SpatialReference) to create an EllipticArcSegment with end points with z-value and/or m-value.

This method can only be accessed via the Factory object.

 EllipticArcSegment createEllipticArcWithStartAndEndpoints(Point startPoint, Point endPoint, double rotationAngle, bool isMinor, bool isCounterClockwise, double semiMajorAxis, double minorMajorRatio, SpatialReference spatialReference)

Creates an elliptic arc segment from the given start and end points, and other parameters that define an ellipse.

• startPoint - The start point of the segment
• endPoint - The end point of the segment
• rotationAngle - The angle in radians by which the major axis of the embedded ellipse is rotated from the x-axis
• isMinor - `true` if centralAngle of the segment is less than PI
• isCounterClockwise - `true` if the direction of the segment, from start point to end point, proceeds in a counterclockwise direction, otherwise `false`
• semiMajorAxis - The length of the semi-major axis of the embedded ellipse
• minorMajorRatio - The ratio of the length of the semi-minor axis to the length of the semi-major axis of the embedded ellipse
• spatialReference - A spatial reference to use for the segment if the points do not have spatial references set

TThe z-value and m-value of the start and end points (if present) are used in the EllipticArcSegment.

To maintain the given startPoint and endPoint in the new segment, the other parameters may be adjusted if required. Such adjustments are made according to the Scalable Vector Graphics 1.1 Specification, Appendix F.6.5. If these cannot be adjusted sufficiently, an arc represented with a straight line is returned.

This method can only be accessed via the Factory object.