---
title: curveType
framework: phase
role: symbol
role_heading: Instance Property
path: phase/phaseenvelopesegment/curvetype
---

# curveType

A curve along the envelope that shapes the segment.

## Declaration

```swift
var curveType: PHASECurveType { get set }
```

## Discussion

Discussion The option you choose for this property determines the segment’s y_-_value rate of change along the input.

## See Also

### Shaping a Segment

- [endPoint](phase/phaseenvelopesegment/endpoint.md)