[page:BufferGeometry] →

# [name]

This is the [page:BufferGeometry] port of [page:CircleGeometry].

## Example

`var geometry = new THREE.CircleBufferGeometry( 5, 32 ); var material = new THREE.MeshBasicMaterial( { color: 0xffff00 } ); var circle = new THREE.Mesh( geometry, material ); scene.add( circle );`

## Constructor

### [name]([param:Float radius], [param:Integer segments], [param:Float thetaStart], [param:Float thetaLength])

radius — Radius of the circle, default = 1.
segments — Number of segments (triangles), minimum = 3, default = 8.
thetaStart — Start angle for first segment, default = 0 (three o'clock position).
thetaLength — The central angle, often called theta, of the circular sector. The default is 2*Pi, which makes for a complete circle.

## Properties

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

## Source

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