---
title: "formUnion(_:)"
framework: spatial
role: symbol
role_heading: Instance Method
path: "spatial/volumetricprotocol/formunion(_:)"
---

# formUnion(_:)

Sets the primitive to the union of itself and the specified primitive.

## Declaration

```swift
mutating func formUnion(_ other: Self)
```

## Parameters

- `other`: The second primitive.