[page:Geometry] →

# [name]

A class for generating a two-dimensional ring geometry.

## Example

`var geometry = new THREE.RingGeometry( 1, 5, 32 ); var material = new THREE.MeshBasicMaterial( { color: 0xffff00, side: THREE.DoubleSide } ); var mesh = new THREE.Mesh( geometry, material ); scene.add( mesh );`

## Constructor

### [name]([param:Float innerRadius], [param:Float outerRadius], [param:Integer thetaSegments], [param:Integer phiSegments], [param:Float thetaStart], [param:Float thetaLength])

innerRadius — Default is 0.5.
outerRadius — Default is 1.
thetaSegments — Number of segments. A higher number means the ring will be more round. Minimum is 3. Default is 8.
phiSegments — Minimum is 1. Default is 8.
thetaStart — Starting angle. Default is 0.
thetaLength — Central angle. Default is Math.PI * 2.

## Properties

See the base [page:Geometry] class for common properties.

### [property:Object parameters]

An object with a property for each of the constructor parameters. Any modification after instantiation does not change the geometry.

## Methods

See the base [page:Geometry] class for common methods.

## Source

[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]