---
title: layoutIndex
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/lowlevelmesh/attribute/layoutindex
---

# layoutIndex

The index of the layout that contains this attribute.

## Declaration

```swift
var layoutIndex: Int
```

## Discussion

Discussion The index refers to an entry in vertexLayouts.

## See Also

### Describing an attribute

- [format](realitykit/lowlevelmesh/attribute/format.md)
- [offset](realitykit/lowlevelmesh/attribute/offset.md)
- [semantic](realitykit/lowlevelmesh/attribute/semantic.md)