---
title: motionStartTime
framework: metal
role: symbol
role_heading: Instance Property
path: metal/mtlindirectaccelerationstructuremotioninstancedescriptor/motionstarttime
---

# motionStartTime

The start time of the motion instance.

## Declaration

```swift
var motionStartTime: Float
```

## See Also

### Specifying motion data

- [motionStartBorderMode](metal/mtlindirectaccelerationstructuremotioninstancedescriptor/motionstartbordermode.md)
- [motionEndTime](metal/mtlindirectaccelerationstructuremotioninstancedescriptor/motionendtime.md)
- [motionEndBorderMode](metal/mtlindirectaccelerationstructuremotioninstancedescriptor/motionendbordermode.md)
- [motionTransformsCount](metal/mtlindirectaccelerationstructuremotioninstancedescriptor/motiontransformscount.md)
- [motionTransformsStartIndex](metal/mtlindirectaccelerationstructuremotioninstancedescriptor/motiontransformsstartindex.md)