---
title: controlPointFormat
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtl4accelerationstructurecurvegeometrydescriptor/controlpointformat
---

# controlPointFormat

Declares the format of the control points the control point buffer references.

## Declaration

```swift
var controlPointFormat: MTLAttributeFormat { get set }
```

## Discussion

Discussion Defaults to MTLAttributeFormatFloat3, representing 3 floating point values tightly packed.