UAnimInstance::PreEvaluateAnimation

function Engine Since 4.11

#include "Animation/AnimInstance.h"

Access: public Specifiers: virtual

Description

Called immediately before the animation graph evaluates bone transforms. Override to set up state that evaluation nodes will read, such as applying curve overrides or adjusting node parameters before they produce the final pose.

Caveats & Gotchas

• May run on a worker thread when parallel evaluation is enabled. Ensure all logic is thread-safe if the project uses parallel anim evaluation.
• Do not read from the output pose here — it has not been computed yet. This is a setup phase for the evaluation pass, not a post-processing hook.

Signature

virtual void PreEvaluateAnimation();

Return Type

void

Example

Apply curve override before evaluation C++

void UMyAnimInstance::PreEvaluateAnimation()
{
    Super::PreEvaluateAnimation();
    if (bOverrideHandIK)
    {
        OverrideCurveValue(FName("HandIK_Weight"), DesiredHandIKWeight);
    }
}

Version History

Introduced in: 4.11

Version	Status	Notes
5.6	stable	—

Feedback

Was this helpful?