---
title: d
framework: accelerate
role: symbol
role_heading: Instance Property
path: accelerate/vimage_perpsectivetransform/d
---

# d

The middle-middle cell in the 3 x 3 transformation matrix.

## Declaration

```swift
var d: Float
```

## See Also

### Inspecting a projective-transformation structure’s properties

- [a](accelerate/vimage_perpsectivetransform/a.md)
- [b](accelerate/vimage_perpsectivetransform/b.md)
- [c](accelerate/vimage_perpsectivetransform/c.md)
- [tx](accelerate/vimage_perpsectivetransform/tx.md)
- [ty](accelerate/vimage_perpsectivetransform/ty.md)
- [vx](accelerate/vimage_perpsectivetransform/vx.md)
- [vy](accelerate/vimage_perpsectivetransform/vy.md)
- [v](accelerate/vimage_perpsectivetransform/v.md)