[page:Geometry] →

# [name]

A class for generating cylinder geometries

## Example

`var geometry = new THREE.CylinderGeometry( 5, 5, 20, 32 ); var material = new THREE.MeshBasicMaterial( {color: 0xffff00} ); var cylinder = new THREE.Mesh( geometry, material ); scene.add( cylinder );`

## Constructor

### [name]([page:Float radiusTop], [page:Float radiusBottom], [page:Float height], [page:Integer radiusSegments], [page:Integer heightSegments], [page:Boolean openEnded], [page:Float thetaStart], [page:Float thetaLength])

radiusTop — Radius of the cylinder at the top. Default is 20.
radiusBottom — Radius of the cylinder at the bottom. Default is 20.
height — Height of the cylinder. Default is 100.
radiusSegments — Number of segmented faces around the circumference of the cylinder. Default is 8
heightSegments — Number of rows of faces along the height of the cylinder. Default is 1.
openEnded — A Boolean indicating whether the ends of the cylinder are open or capped. Default is false, meaning capped.
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 cylinder.

## Properties

Each of the constructor parameters is accessible as a property of the same name. Any modification of these properties after instantiation does not change the geometry.

## Source

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