---
title: superEllipticPower
framework: modelio
role: symbol
role_heading: Instance Property
path: modelio/mdlarealight/superellipticpower
---

# superEllipticPower

A vector that controls the roundness of a superelliptical light in the x- and y-axis directions.

## Declaration

```swift
var superEllipticPower: vector_float2 { get set }
```

## Discussion

Discussion This property applies only if the inherited lightType property’s value is MDLLightType.superElliptical. A superellipse is a two-dimensional figure that can vary in shape according to two parameters. The x- and y-components of this vector control the general shape of the figure along the corresponding axes: A value less than 1.0 produces a star-like shape, with points in the direction of each axis. A value of exactly 1.0 produces a diamond shape. A value of exactly 2.0 produces a circle. A value greater than 2.0 produces a rectangle with rounded corners, with increasing values decreasing the corner radius.

## See Also

### Managing a Light’s Shape

- [areaRadius](modelio/mdlarealight/arearadius.md)
- [aspect](modelio/mdlarealight/aspect.md)