Unreal Engine 4.26 Documentation

Unreal Engine 4.27 Documentation

Unreal Engine 5.0 Documentation

Unreal Engine 5.1 Documentation

Unreal Engine 5.2 Documentation

Unreal Engine 5.3 Documentation

> Unreal Engine API Reference > Plugins > IKRig > Solvers > UIKRig_FBIKEffector > PullChainAlpha

Light Theme

Dark Theme

PullChainAlpha

Range 0-1 (default is 1.0).

Choose your operating system:

Windows

macOS

Linux

Syntax

UPROPERTY(EditAnywhere, Category="Full Body IK Effector",
Meta=(ClampMin="0", ClampMax="1", UIMin="0.0", UIMax="1.0"))
float PullChainAlpha

Remarks

Range 0-1 (default is 1.0). When enabled (greater than 0.0), the solver internally partitions the skeleton into 'chains' which extend from the effector to the nearest fork in the skeleton. These chains are pre-rotated and translated, as a whole, towards the effector targets. This can improve the results for sparse bone chains, and significantly improve convergence on dense bone chains. But it may cause undesirable results in highly constrained bone chains (like robot arms).