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# MTLRasterizationRateSampleArray

An array instance that contains rasterization rates.

```
class MTLRasterizationRateSampleArray
```

## Overview

The [`horizontal`](/documentation/Metal/MTLRasterizationRateLayerDescriptor/horizontal) and [`vertical`](/documentation/Metal/MTLRasterizationRateLayerDescriptor/vertical) properties of an [`MTLRasterizationRateLayerDescriptor`](/documentation/Metal/MTLRasterizationRateLayerDescriptor) point to [`MTLRasterizationRateSampleArray`](/documentation/Metal/MTLRasterizationRateSampleArray) instances that contains rasterization rates for the layer map. You can use array subscript syntax to access the samples. [`MTLRasterizationRateSampleArray`](/documentation/Metal/MTLRasterizationRateSampleArray) instances perform bounds checking on any memory operations you make to their sample data.

## Topics

### Accessing the array

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

Retrieves the sample value at the specified index.

[`-  objectAtIndexedSubscript:`](/documentation/Metal/MTLRasterizationRateSampleArray/objectAtIndexedSubscript:)

Retrieves the sample value at the specified index.

[`-  setObject:atIndexedSubscript:`](/documentation/Metal/MTLRasterizationRateSampleArray/setObject:atIndexedSubscript:)

Stores a sample value at the specified index.

## Relationships

### Conforms To

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`Equatable`](/documentation/Swift/Equatable)

[`NSObjectProtocol`](/documentation/ObjectiveC/NSObjectProtocol)

[`CustomDebugStringConvertible`](/documentation/Swift/CustomDebugStringConvertible)

[`Hashable`](/documentation/Swift/Hashable)

[`CVarArg`](/documentation/Swift/CVarArg)

### Inherits From

[`NSObject-swift.class`](/documentation/ObjectiveC/NSObject-swift.class)

---

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