---
title: "init(positionIterations:velocityIterations:)"
framework: realitykit
role: symbol
role_heading: Initializer
path: "realitykit/physicssimulationcomponent/solveriterations-swift.struct/init(positioniterations:velocityiterations:)"
---

# init(positionIterations:velocityIterations:)

Creates a solver iterations configuration.

## Declaration

```swift
init(positionIterations: Int = 6, velocityIterations: Int = 1)
```

## Parameters

- `positionIterations`: The number of position iterations the solver performs, in the inclusive range [1, 255]. The default value is 6.
- `velocityIterations`: The number of velocity iterations the solver performs, in the inclusive range [1, 255]. The default value is 1.