English | 简体中文

EllipseOutlineGeometry

new Cesium.EllipseOutlineGeometry(options)
engine/Source/Core/EllipseOutlineGeometry.js 213

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 distance in meters between the ellipse and the ellipsoid surface.
extrudedHeight number optional The distance in meters between the ellipse's extruded face and the ellipsoid surface.
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:
const ellipse = new Cesium.EllipseOutlineGeometry({
  center : Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883),
  semiMajorAxis : 500000.0,
  semiMinorAxis : 300000.0,
  rotation : Cesium.Math.toRadians(60.0)
});
const geometry = Cesium.EllipseOutlineGeometry.createGeometry(ellipse);
See:

Members

static Cesium.EllipseOutlineGeometry.packedLength : number
engine/Source/Core/EllipseOutlineGeometry.js 268

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

Methods

static Cesium.EllipseOutlineGeometry.createGeometry(ellipseGeometry) → Geometry|undefined
engine/Source/Core/EllipseOutlineGeometry.js 392

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.

static Cesium.EllipseOutlineGeometry.pack(value, array, startingIndex) → Array.<number>
engine/Source/Core/EllipseOutlineGeometry.js 280

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.
Returns:
The array that was packed into

static Cesium.EllipseOutlineGeometry.unpack(array, startingIndex, result) → EllipseOutlineGeometry
engine/Source/Core/EllipseOutlineGeometry.js 333

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.
Need help? The fastest way to get answers is from the community and team on the Cesium Forum.
packages/engine
packages/widgets