---
title: "init(stiffness:)"
framework: realitykit
role: symbol
role_heading: Initializer
path: "realitykit/clothbodycomponent/inflationconstraint-swift.struct/init(stiffness:)"
---

# init(stiffness:)

Creates an inflation configuration that defaults to the mesh volume.

## Declaration

```swift
init(stiffness: Float = 1.0)
```

## Parameters

- `stiffness`: The resistance to diverge from the target volume. Valid range is [0.0, 1.0].

## See Also

### Creating an inflation constraint

- [init(targetVolume:stiffness:)](realitykit/clothbodycomponent/inflationconstraint-swift.struct/init(targetvolume:stiffness:).md)