---
title: startOfEncoderSampleIndex
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtlaccelerationstructurepasssamplebufferattachmentdescriptor/startofencodersampleindex
---

# startOfEncoderSampleIndex

## Declaration

```swift
var startOfEncoderSampleIndex: Int { get set }
```

## Mentioned in

Sampling GPU data into counter sample buffers