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# MTLIndexType

The index type for an index buffer that references vertices of geometric primitives.

```
enum MTLIndexType
```

## Topics

### Index types

[`MTLIndexType.uint16`](/documentation/Metal/MTLIndexType/uint16)

A 16-bit unsigned integer used as a primitive index.

[`MTLIndexType.uint32`](/documentation/Metal/MTLIndexType/uint32)

A 32-bit unsigned integer used as a primitive index.


---

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