---
title: startPoint
framework: phase
role: symbol
role_heading: Instance Property
path: phase/phaseenvelope/startpoint
---

# startPoint

The starting point along the envelope’s duration.

## Declaration

```swift
var startPoint: simd_double2 { get }
```

## Discussion

Discussion The framework sets the value of this property to the init(startPoint:segments:) argument.

## See Also

### Inspecting the Envelope

- [evaluate(x:)](phase/phaseenvelope/evaluate(x:).md)
- [segments](phase/phaseenvelope/segments.md)