# EllipseOutlineGeometry

#### new Cesium.EllipseOutlineGeometry(options)
Core/EllipseOutlineGeometry.js 164

  A description of the outline of an ellipse on an ellipsoid.

  Name | Type | Description
  --- | --- | ---
  `options` | Object | Object with the following properties:
  Name | Type | Default | Description
  --- | --- | --- | ---
  `center` | Cartesian3 |  | The ellipse's center point in the fixed frame.
  `semiMajorAxis` | Number |  | The length of the ellipse's semi-major axis in meters.
  `semiMinorAxis` | Number |  | The length of the ellipse's semi-minor axis in meters.
  `ellipsoid` | Ellipsoid | `Ellipsoid.WGS84` | optional The ellipsoid the ellipse will be on.
  `height` | Number | `0.0` | optional The height above the ellipsoid.
  `extrudedHeight` | Number |  | optional The height of the extrusion.
  `rotation` | Number | `0.0` | optional The angle from north (counter-clockwise) in radians.
  `granularity` | Number | `0.02` | optional The angular distance between points on the ellipse in radians.
  `numberOfVerticalLines` | Number | `16` | optional Number of lines to draw between the top and bottom surface of an extruded ellipse.

  ##### Throws:

  - DeveloperError : semiMajorAxis and semiMinorAxis must be greater than zero.
  - DeveloperError : semiMajorAxis must be greater than or equal to the semiMinorAxis.
  - DeveloperError : granularity must be greater than zero.

  ##### Example:

      var ellipse = new Cesium.EllipseOutlineGeometry({
        center : Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883),
        semiMajorAxis : 500000.0,
        semiMinorAxis : 300000.0,
        rotation : Cesium.Math.toRadians(60.0)
      });
      var geometry = Cesium.EllipseOutlineGeometry.createGeometry(ellipse);

  ##### Demo:

  - Cesium Sandcastle Ellipse Outline Demo

  ##### See:

  - EllipseOutlineGeometry.createGeometry

### Members

#### staticCesium.EllipseOutlineGeometry.packedLength : Number
Core/EllipseOutlineGeometry.js 214

  The number of elements used to pack the object into an array.

### Methods

#### staticCesium.EllipseOutlineGeometry.createGeometry(ellipseGeometry) → Geometry
Core/EllipseOutlineGeometry.js 330

  Computes the geometric representation of an outline of an ellipse on an ellipsoid, including its vertices, indices, and a bounding sphere.

  Name | Type | Description
  --- | --- | ---
  `ellipseGeometry` | EllipseOutlineGeometry | A description of the ellipse.

  ##### Returns:

  The computed vertices and indices.

#### staticCesium.EllipseOutlineGeometry.pack(value, array, startingIndex)
Core/EllipseOutlineGeometry.js 223

  Stores the provided instance into the provided array.

  Name | Type | Default | Description
  --- | --- | --- | ---
  `value` | EllipseOutlineGeometry |  | The value to pack.
  `array` | Array.<Number> |  | The array to pack into.
  `startingIndex` | Number | `0` | optional The index into the array at which to start packing the elements.

#### staticCesium.EllipseOutlineGeometry.unpack(array, startingIndex, result) → EllipseOutlineGeometry
Core/EllipseOutlineGeometry.js 274

  Retrieves an instance from a packed array.

  Name | Type | Default | Description
  --- | --- | --- | ---
  `array` | Array.<Number> |  | The packed array.
  `startingIndex` | Number | `0` | optional The starting index of the element to be unpacked.
  `result` | EllipseOutlineGeometry |  | optional The object into which to store the result.

  ##### Returns:

  The modified result parameter or a new EllipseOutlineGeometry instance if one was not provided.