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# readIndices(using:)

Retrieves the Metal index buffer for GPU reading.

```
@MainActor func readIndices(using commandBuffer: any MTLCommandBuffer) -> any MTLBuffer
```

## Parameters

`commandBuffer`

The <doc://com.apple.documentation/documentation/Metal/MTLCommandBuffer>
you intend to use for reading.
RealityKit waits for the command buffer to complete before discarding the buffer.

---

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