---
title: SCNMatrix4Identity
framework: scenekit
role: symbol
role_heading: Global Variable
path: scenekit/scnmatrix4identity
---

# SCNMatrix4Identity

The 4 x 4 identity matrix.

## Declaration

```swift
let SCNMatrix4Identity: SCNMatrix4
```

```swift
let SCNMatrix4Identity: SCNMatrix4
```

## Discussion

Discussion Elements on the diagonal of this matrix are 1.0; all other elements are 0.0. Multiplying another matrix by the identity matrix or multiplying the identity matrix by another matrix yields the other matrix.