---
title: "unapplying(_:)"
framework: spatial
role: symbol
role_heading: Instance Method
path: "spatial/size3dfloat/unapplying(_:)-2tlsj"
---

# unapplying(_:)

Unapplies an affine transform.

## Declaration

```swift
func unapplying(_ transform: AffineTransform3DFloat) -> Size3DFloat
```

## Parameters

- `transform`: The affine transform.

## Discussion

Discussion note: The transform must be rectilinear otherwise this function returns self.