---
title: isAdditive
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/blendtreeanimation/isadditive
---

# isAdditive

A Boolean value that indicates whether the animation builds on the current state of the target entity or resets the state before running.

## Declaration

```swift
var isAdditive: Bool { get set }
```

## See Also

### Configuring the animation

- [root](realitykit/blendtreeanimation/root.md)
- [name](realitykit/blendtreeanimation/name.md)
- [bindTarget](realitykit/blendtreeanimation/bindtarget.md)
- [blendLayer](realitykit/blendtreeanimation/blendlayer.md)