FAnimNode_TransitionPoseEvaluator uses FStackAttributeContainer to cache data over multiple frames

UE - Anim - Runtime - Sep 15, 2021

FAnimNode_TransitionPoseEvaluator can cache a pose over multiple frames using FStackAttributeContainer rather than the heap equivalent. This will likely crash at some point if any user uses the cac ...

Switching LOD while using Evaluation Mode = Freeze in custom transit graph fails

UE - Anim - Runtime - Sep 14, 2021

If a user setups up a custom transition graph that caches one of the input poses by setting the Evaluator Mode property to Freeze then the node fails to deal with the situation where the LOD or mesh ...

Crash Applying Multiple Anim Modifiers

UE - Anim - Runtime - Sep 5, 2021

Fatal error: [Link Removed] [Line: 2516] Fatal error: [Link Removed] [Line: 2516]Objects have the same fully qualified name but different paths. New Object: MotionExtractorModifier /Game/Characters/ ...

Renaming a SkinnedMeshComponent onto a different owning actor will cause issues with FAnimUpdateRateManager

UE - Anim - Runtime - Aug 12, 2021

As mentioned in the UDN - the user tried to rename an SMC to a different actor, which leaves the URO manager left with an incorrect data as it is not aware of the move. User proposed overriding Post ...

TriggerMontageEndedEvent will clear queued notifies for all instances of a montage

UE - Anim - Runtime - Jul 29, 2021

When a montage finishes and TriggerMontageEndedEvent is called, all queued notifies for that montage are cleared. However, this assumes that there is only one instance of the montage active at any ...

Single Frame Blendspace doesn't sample root motion

UE - Anim - Runtime - Jul 26, 2021

Single Frame Blendspace nodes don't correctly sample/generate root motion. The reason for this is because of how we calculate the delta to bump the sampling within the blendspace each frame. In a ...

Cannot select child anim BPs for use in linked anim layers

UE - Anim - Runtime - Jul 15, 2021

From UDN: [Link Removed] Unable to set a Child ABP with inherited interface to a Linked Animation Layer Instance Class. I have a ABP_Biped which is our main ABP. I have the locomotion (idle+straf ...

If enable Preview Slot of non-default slot in AnimMontage, AnimNotify of AnimationSequence does not run.

UE - Anim - Runtime - Jul 15, 2021

The AnimSingleNodeInstance used in the AnimMontage preview does not consider multiple Slots. The following is a correction code. void UAnimSingleNodeInstance::SetAnimationAsset(class UAnimationAsse ...

Fast Path pin update can break when anim BP compilation generates warnings

UE - Anim - Runtime - May 13, 2021

It seems that a Anim BP that generates a warning will break the updating of pins that are connected via fastpath in other parts of the graph. This was reported on the following UDN: [Link Removed] ...

Split pins on nodes within sub-graphs in an animation blueprint are broken

UE - Anim - Runtime - Mar 16, 2021

There's a bug in the anim bp compiler which results in split pins on animation nodes not being merged properly back onto their parent pin during compilation. The result of this is that any input to ...