---
title: fkWeightPerAxis
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/ikcomponent/joint/fkweightperaxis
---

# fkWeightPerAxis

The per-axis weight of the source animation demand on the joint.

## Declaration

```swift
var fkWeightPerAxis: SIMD3<Float> { get set }
```

## Discussion

Discussion This value is in the closed range [0, 1], where 0 means no influence, and 1 is the maximum influence.