---
title: "unapplying(_:)"
framework: spatial
role: symbol
role_heading: Instance Method
path: "spatial/rect3dfloat/unapplying(_:)-31d5i"
---

# unapplying(_:)

Unapplies a projective transform.

## Declaration

```swift
func unapplying(_ transform: ProjectiveTransform3DFloat) -> Rect3DFloat
```

## Parameters

- `transform`: The projective transform.

## Discussion

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