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# MTLVertexAmplificationViewMapping

An offset applied to a render target index and viewport index.

```
struct MTLVertexAmplificationViewMapping
```

## Topics

### Creating a view mapping

[`init()`](/documentation/Metal/MTLVertexAmplificationViewMapping/init())

Initializes a default view mapping.

[`init(viewportArrayIndexOffset:renderTargetArrayIndexOffset:)`](/documentation/Metal/MTLVertexAmplificationViewMapping/init(viewportArrayIndexOffset:renderTargetArrayIndexOffset:))

Initializes a new view mapping.

### Specifying mapping offsets

[`renderTargetArrayIndexOffset`](/documentation/Metal/MTLVertexAmplificationViewMapping/renderTargetArrayIndexOffset)

An offset into the list of render targets.

[`viewportArrayIndexOffset`](/documentation/Metal/MTLVertexAmplificationViewMapping/viewportArrayIndexOffset)

An offset into the list of viewports.


---

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