---
title: segmentControlPointCount
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtlaccelerationstructurecurvegeometrydescriptor/segmentcontrolpointcount
---

# segmentControlPointCount

The number of control points in each curve segment.

## Declaration

```swift
var segmentControlPointCount: Int { get set }
```

## Discussion

Discussion This value can be 2, 3, or 4.