CircleGeometry - Cesium Documentation

CircleGeometry

new CircleGeometry

A description of a circle on the ellipsoid.

Parameters:

Name	Type	Argument	Default	Description
`options.center`	Cartesian3			The circle's center point in the fixed frame.
`options.radius`	Number			The radius in meters.
`options.ellipsoid`	Ellipsoid	<optional>	Ellipsoid.WGS84	The ellipsoid the circle will be on.
`options.height`	Number	<optional>	0.0	The height above the ellipsoid.
`options.granularity`	Number	<optional>	0.02	The angular distance between points on the circle in radians.
`options.vertexFormat`	VertexFormat	<optional>	VertexFormat.DEFAULT	The vertex attributes to be computed.
`options.extrudedHeight`	Number	<optional>	0.0	The height of the extrusion relative to the ellipsoid.
`options.stRotation`	Number	<optional>	0.0	The rotation of the texture coordinates, in radians. A positive rotation is counter-clockwise.

Throws:

DeveloperError : center is required.
DeveloperError : radius is required.
DeveloperError : radius must be greater than zero.
DeveloperError : granularity must be greater than zero.

Example

// Create a circle.
var ellipsoid = Ellipsoid.WGS84;
var circle = new CircleGeometry({
  ellipsoid : ellipsoid,
  center : ellipsoid.cartographicToCartesian(Cartographic.fromDegrees(-75.59777, 40.03883)),
  radius : 100000.0
});
var geometry = CircleGeometry.createGeometry(circle);

See:

CircleGeometry#createGeometry

Source:

/Source/Core/CircleGeometry.js

Methods

<static> createGeometry

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

Parameters:

Name	Type	Description
`circleGeometry`	CircleGeometry	A description of the circle.

Returns:

Geometry The computed vertices and indices.