---
title: heightSegmentCount
framework: scenekit
role: symbol
role_heading: Instance Property
path: scenekit/scntube/heightsegmentcount
---

# heightSegmentCount

The number of subdivisions in the inner and outer surfaces of the tube along its y-axis. Animatable.

## Declaration

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

## Discussion

Discussion A larger number of segments adds more vertex data to the geometry. Although the inner and outer surfaces of the tube are flat in the y-axis direction, extra vertices can be useful for lighting or custom shader programs. Adding vertices increases rendering cost, so use the minimal segment count that produces your desired visual effect. The default segment count is 1. Setting this property’s value to a number less than 1 results in undefined behavior. You can animate changes to this property’s value. See Animating SceneKit Content.

## See Also

### Adjusting Geometric Detail

- [radialSegmentCount](scenekit/scntube/radialsegmentcount.md)