---
title: "subscript(_:)"
framework: arkit
role: symbol
role_heading: Instance Subscript
path: "arkit/argeometrysource/subscript(_:)-7jf4y"
---

# subscript(_:)

Provides the number at the subscripted index.

## Declaration

```swift
@nonobjc subscript(index: Int32) -> CUnsignedChar { get }
```

## Discussion

Discussion This subscript operates on one-component geometry sources with a format of MTLVertexFormat.uchar, such as classification.

## See Also

### Accessing Geometry

- [subscript(_:)](arkit/argeometrysource/subscript(_:)-3v98f.md)
- [buffer](arkit/argeometrysource/buffer.md)