---
title: viewPosition
framework: Compute Graph
role: symbol
role_heading: Instance Property
platforms: [iOS 27.0+, iPadOS 27.0+, Mac Catalyst 27.0+, macOS 27.0+, tvOS 27.0+, visionOS 27.0+]
path: computegraph/computegraphsimulation/advanceparams/viewposition
---

# viewPosition

The position of the viewer in world space.

## Declaration

```swift
var viewPosition: SIMD3<Float>?
```

## Discussion

Discussion When provided, this value can be used for billboarding or read within the graph for viewer-relative effects.