[page:Curve] →
# [name]

Creates a 2d curve in the shape of an ellipse. Setting the
[page:Number xRadius] equal to the [page:Number yRadius] will result in a circle.

## Code Example

```
const curve = new THREE.EllipseCurve(
0, 0, // ax, aY
10, 10, // xRadius, yRadius
0, 2 * Math.PI, // aStartAngle, aEndAngle
false, // aClockwise
0 // aRotation
);
const points = curve.getPoints( 50 );
const geometry = new THREE.BufferGeometry().setFromPoints( points );
const material = new THREE.LineBasicMaterial( { color : 0xff0000 } );
// Create the final object to add to the scene
const ellipse = new THREE.Line( geometry, material );
```

## Constructor

### [name]( [param:Float aX], [param:Float aY], [param:Float xRadius], [param:Float yRadius], [param:Radians aStartAngle], [param:Radians aEndAngle], [param:Boolean aClockwise], [param:Radians aRotation] )

[page:Float aX] – The X center of the ellipse. Default is *0*.

[page:Float aY] – The Y center of the ellipse. Default is *0*.

[page:Float xRadius] – The radius of the ellipse in the x direction. Default is *1*.

[page:Float yRadius] – The radius of the ellipse in the y direction. Default is *1*.

[page:Radians aStartAngle] – The start angle of the curve in radians starting from the positive X axis. Default is *0*.

[page:Radians aEndAngle] – The end angle of the curve in radians starting from the positive X axis. Default is *2 x Math.PI*.

[page:Boolean aClockwise] – Whether the ellipse is drawn clockwise. Default is *false*.

[page:Radians aRotation] – The rotation angle of the ellipse in radians, counterclockwise from the positive X axis (optional). Default is *0*.

## Properties

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

### [property:Float aX]

The X center of the ellipse.

### [property:Float aY]

The Y center of the ellipse.

### [property:Radians xRadius]

The radius of the ellipse in the x direction.

### [property:Radians yRadius]

The radius of the ellipse in the y direction.

### [property:Float aStartAngle]

The start angle of the curve in radians starting from the middle right side.

### [property:Float aEndAngle]

The end angle of the curve in radians starting from the middle right side.

### [property:Boolean aClockwise]

Whether the ellipse is drawn clockwise.

### [property:Float aRotation]

The rotation angle of the ellipse in radians, counterclockwise from the positive X axis (optional). Default is *0*.

## Methods

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

## Source

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