---
title: normalMatrix
framework: GLKit
role: symbol
role_heading: Instance Property
platforms: [iOS 5.0+, iPadOS 5.0+, macOS 10.8+, tvOS 9.0+]
path: glkit/glkeffectpropertytransform/normalmatrix
---

# normalMatrix

The matrix used to transform normal coordinates from world space to eye space.

## Declaration

```swift
var normalMatrix: GLKMatrix3 { get }
```

## Discussion

Discussion The normal matrix is derived from the modelviewMatrix property and is automatically calculated when needed.

## See Also

### Configuring Modelview Properties

- [modelviewMatrix](glkit/glkeffectpropertytransform/modelviewmatrix.md)