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# MTLVertexAttributeDescriptorArray

An array of vertex attribute descriptor instances.

```
class MTLVertexAttributeDescriptorArray
```

## Overview

An [`MTLVertexAttributeDescriptorArray`](/documentation/Metal/MTLVertexAttributeDescriptorArray) instance is an array of instances that defines how vertex attribute data is formatted and assigned to an index in the attribute argument table. The methods of [`MTLVertexAttributeDescriptorArray`](/documentation/Metal/MTLVertexAttributeDescriptorArray) set or retrieve the attribute formatting information from the array.

## Topics

### Accessing a specified vertex attribute

[`subscript(_:)`](/documentation/Metal/MTLVertexAttributeDescriptorArray/subscript(_:))

Returns the state of the specified vertex attribute.

[`setObject:atIndexedSubscript:`](/documentation/Metal/MTLVertexAttributeDescriptorArray/setObject:atIndexedSubscript:)

Sets state for the specified vertex attribute.


---

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