FAnimNode_SpringBone | Unreal Engine 5.0 Documentation

Inheritance Hierarchy


Module	AnimGraphRuntime
Header	/Engine/Source/Runtime/AnimGraphRuntime/Public/BoneControllers/AnimNode_SpringBone.h
Include	#include "BoneControllers/AnimNode_SpringBone.h"

struct FAnimNode_SpringBone : public FAnimNode_SkeletalControlBase

Simple controller that replaces or adds to the translation/rotation of a single bone.

Type	Name	Description
uint8: 1	bHadValidStrength	Did we have a non-zero ControlStrength last frame.
uint8: 1	bLimitDisplacement	Limit the amount that a bone can stretch from its ref-pose length.
FVector	BoneLocation	World-space location of the bone.
FVector	BoneVelocity	World-space velocity of the bone.
uint8: 1	bRotateX	If true take the spring calculation for rotation in X
uint8: 1	bRotateY	If true take the spring calculation for rotation in Y
uint8: 1	bRotateZ	If true take the spring calculation for rotation in Z
uint8: 1	bTranslateX	If true take the spring calculation for translation in X
uint8: 1	bTranslateY	If true take the spring calculation for translation in Y
uint8: 1	bTranslateZ	If true take the spring calculation for translation in Z
double	ErrorResetThresh	If spring stretches more than this, reset it. Useful for catching teleports etc
float	FixedTimeStep	Internal use - Current timestep
FVector	LocalBoneTransform	Cache of previous frames local bone transform so that when we cannot simulate (timestep == 0) we can still update bone location
double	MaxDisplacement	If bLimitDisplacement is true, this indicates how long a bone can stretch beyond its length in the ref-pose.
FVector	OwnerVelocity	Velocity of the owning actor
float	RemainingTime	Internal use - Amount of time we need to simulate.
FBoneReference	SpringBone	Name of bone to control. This is the main bone chain to modify from.
double	SpringDamping	Damping of spring
double	SpringStiffness	Stiffness of spring
float	TimeDilation	Internal use - Current time dilation

	Type	Name	Description
		FAnimNode_SpringBone ()

Type	Name	Description
void	EvaluateSkeletalControl_AnyThread ( FComponentSpacePoseContext& Output, TArray< FBoneTransform >& OutBoneTransforms )	Evaluate the new component-space transforms for the affected bones.
bool	IsValidToEvaluate ( const USkeleton* Skeleton, const FBoneContainer& RequiredBones )	Return true if it is valid to Evaluate
void	UpdateInternal ( const FAnimationUpdateContext& Context )	Interface for derived skeletal controls to implement use this function to update for skeletal control base

Type	Name	Description
void	CacheBones_AnyThread ( const FAnimationCacheBonesContext& Context )	Called to cache any bones that this node needs to track (e.g. in a FBoneReference).
void	GatherDebugData ( FNodeDebugData& DebugData )	Called to gather on-screen debug data. This is called on the game thread.
bool	HasPreUpdate ()	Override this to indicate that PreUpdate() should be called on the game thread (usually to gather non-thread safe data) before Update() is called.
void	Initialize_AnyThread ( const FAnimationInitializeContext& Context )	Called when the node first runs.
void	PreUpdate ( const UAnimInstance* InAnimInstance )	Override this to perform game-thread work prior to non-game thread Update() being called