---
title: controlPointFormat
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtl4accelerationstructuremotioncurvegeometrydescriptor/controlpointformat
---

# controlPointFormat

Declares the format of the control points in the buffers that the control point buffers reference.

## Declaration

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

## Discussion

Discussion All keyframes share the same control point format. Defaults to MTLAttributeFormatFloat3, representing 3 floating point values tightly packed.