---
title: "dolly(by:onScreenPoint:viewport:)"
framework: scenekit
role: symbol
role_heading: Instance Method
path: "scenekit/scncameracontroller/dolly(by:onscreenpoint:viewport:)"
---

# dolly(by:onScreenPoint:viewport:)

## Declaration

```swift
func dolly(by delta: Float, onScreenPoint point: CGPoint, viewport: CGSize)
```