---
title: allowsPrimitiveRestart
framework: realitykit
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: realitykit/lowlevelmesh/descriptor-swift.struct/allowsprimitiverestart
---

# allowsPrimitiveRestart

When true, primitive-restart index values (0xFFFF for .uint16, 0xFFFFFFFF for .uint32) are permitted in the index buffer. Every part must then use a strip topology (.triangleStrip or .lineStrip); any other topology is rejected.

## Declaration

```swift
var allowsPrimitiveRestart: Bool
```