EllipseGeometry

new EllipseGeometry(options)

A description 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 (clockwise) in radians.
stRotation Number 0.0 optional The rotation of the texture coordinates, in radians. A positive rotation is counter-clockwise.
granularity Number CesiumMath.RADIANS_PER_DEGREE optional The angular distance between points on the ellipse in radians.
vertexFormat VertexFormat VertexFormat.DEFAULT optional The vertex attributes to be computed.
Throws:
Example:
// Create an ellipse.
var ellipse = new Cesium.EllipseGeometry({
  center : Cesium.Cartesian3.fromDegrees(-75.59777, 40.03883),
  semiMajorAxis : 500000.0,
  semiMinorAxis : 300000.0,
  rotation : Cesium.Math.toRadians(60.0)
});
var geometry = Cesium.EllipseGeometry.createGeometry(ellipse);
Demo:
See:
Source: Core/EllipseGeometry.js, line 626

Members

staticEllipseGeometry.packedLength :Number

The number of elements used to pack the object into an array.
Source: Core/EllipseGeometry.js, line 678

Methods

staticEllipseGeometry.createGeometry(ellipseGeometry) → Geometry

Computes the geometric representation of a ellipse on an ellipsoid, including its vertices, indices, and a bounding sphere.
Name Type Description
ellipseGeometry EllipseGeometry A description of the ellipse.
Returns:
The computed vertices and indices.
Source: Core/EllipseGeometry.js, line 801

staticEllipseGeometry.pack(value, array, startingIndex)

Stores the provided instance into the provided array.
Name Type Default Description
value Object 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.
Source: Core/EllipseGeometry.js, line 688

staticEllipseGeometry.unpack(array, startingIndex, result)

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 EllipseGeometry optional The object into which to store the result.
Source: Core/EllipseGeometry.js, line 742