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// Copyright 2025 https://yuewu.dev/en All Rights Reserved.
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#include "Nodes/GMS_AnimNode_OrientationWarping.h"
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#include "Animation/AnimInstanceProxy.h"
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#include "Animation/AnimNodeFunctionRef.h"
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#include "Animation/AnimRootMotionProvider.h"
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#include "BoneControllers/AnimNode_OffsetRootBone.h"
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#include "HAL/IConsoleManager.h"
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#include "Animation/AnimTrace.h"
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#include "Logging/LogVerbosity.h"
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#include "VisualLogger/VisualLogger.h"
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#include UE_INLINE_GENERATED_CPP_BY_NAME(GMS_AnimNode_OrientationWarping)
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DECLARE_CYCLE_STAT(TEXT("OrientationWarping Eval"), STAT_OrientationWarping_Eval, STATGROUP_Anim);
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#if ENABLE_ANIM_DEBUG
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static TAutoConsoleVariable<int32> CVarAnimNodeOrientationWarpingDebug(TEXT("a.AnimNode.GenericOrientationWarping.Debug"), 0, TEXT("Turn on visualization debugging for Orientation Warping."));
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static TAutoConsoleVariable<int32> CVarAnimNodeOrientationWarpingVerbose(TEXT("a.AnimNode.GenericOrientationWarping.Verbose"), 0, TEXT("Turn on verbose graph debugging for Orientation Warping"));
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static TAutoConsoleVariable<int32> CVarAnimNodeOrientationWarpingEnable(TEXT("a.AnimNode.GenericOrientationWarping.Enable"), 1, TEXT("Toggle Orientation Warping"));
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#endif
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namespace UE::Anim
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{
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static inline FVector GetAxisVector(const EAxis::Type& InAxis)
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{
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switch (InAxis)
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{
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case EAxis::X:
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return FVector::ForwardVector;
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case EAxis::Y:
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return FVector::RightVector;
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default:
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return FVector::UpVector;
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};
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}
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static inline bool IsInvalidWarpingAngleDegrees(float Angle, float Tolerance)
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{
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Angle = FRotator::NormalizeAxis(Angle);
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return FMath::IsNearlyZero(Angle, Tolerance) || FMath::IsNearlyEqual(FMath::Abs(Angle), 180.f, Tolerance);
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}
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static float SignedAngleRadBetweenNormals(const FVector& From, const FVector& To, const FVector& Axis)
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{
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const float FromDotTo = FVector::DotProduct(From, To);
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const float Angle = FMath::Acos(FromDotTo);
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const FVector Cross = FVector::CrossProduct(From, To);
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const float Dot = FVector::DotProduct(Cross, Axis);
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return Dot >= 0 ? Angle : -Angle;
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}
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}
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void FGMS_AnimNode_OrientationWarping::GatherDebugData(FNodeDebugData& DebugData)
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{
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FString DebugLine = DebugData.GetNodeName(this);
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#if ENABLE_ANIM_DEBUG
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if (CVarAnimNodeOrientationWarpingVerbose.GetValueOnAnyThread() == 1)
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{
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if (Mode == EWarpingEvaluationMode::Manual)
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{
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DebugLine += TEXT("\n - Evaluation Mode: (Manual)");
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DebugLine += FString::Printf(TEXT("\n - Orientation Angle: (%.3fd)"), FMath::RadiansToDegrees(ActualOrientationAngleRad));
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}
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else
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{
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DebugLine += TEXT("\n - Evaluation Mode: (Graph)");
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DebugLine += FString::Printf(TEXT("\n - Orientation Angle: (%.3fd)"), FMath::RadiansToDegrees(ActualOrientationAngleRad));
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// Locomotion angle is already in degrees.
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DebugLine += FString::Printf(TEXT("\n - Locomotion Angle: (%.3fd)"), LocomotionAngle);
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DebugLine += FString::Printf(TEXT("\n - Locomotion Delta Angle Threshold: (%.3fd)"), LocomotionAngleDeltaThreshold);
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#if WITH_EDITORONLY_DATA
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DebugLine += FString::Printf(TEXT("\n - Root Motion Delta Attribute Found: %s)"), (bFoundRootMotionAttribute) ? TEXT("true") : TEXT("false"));
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#endif
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}
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if (const UEnum* TypeEnum = FindObject<UEnum>(nullptr, TEXT("/Script/CoreUObject.EAxis")))
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{
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DebugLine += FString::Printf(TEXT("\n - Rotation Axis: (%s)"), *(TypeEnum->GetNameStringByIndex(static_cast<int32>(RotationAxis))));
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}
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DebugLine += FString::Printf(TEXT("\n - Rotation Interpolation Speed: (%.3fd)"), RotationInterpSpeed);
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}
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else
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#endif
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{
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const float ActualOrientationAngleDegrees = FMath::RadiansToDegrees(ActualOrientationAngleRad);
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DebugLine += FString::Printf(TEXT("(Orientation Angle: %.3fd)"), ActualOrientationAngleDegrees);
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}
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DebugData.AddDebugItem(DebugLine);
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ComponentPose.GatherDebugData(DebugData);
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}
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void FGMS_AnimNode_OrientationWarping::Initialize_AnyThread(const FAnimationInitializeContext& Context)
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{
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FAnimNode_SkeletalControlBase::Initialize_AnyThread(Context);
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Reset(Context);
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//早一点拿到ExternalBoneReference.
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if (IsLODEnabled(Context.AnimInstanceProxy))
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{
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GetEvaluateGraphExposedInputs().Execute(Context);
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}
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}
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void FGMS_AnimNode_OrientationWarping::UpdateInternal(const FAnimationUpdateContext& Context)
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{
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FAnimNode_SkeletalControlBase::UpdateInternal(Context);
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// If we just became relevant and haven't been initialized yet, then reset.
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if (!bIsFirstUpdate && UpdateCounter.HasEverBeenUpdated() && !UpdateCounter.WasSynchronizedCounter(Context.AnimInstanceProxy->GetUpdateCounter()))
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{
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Reset(Context);
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}
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UpdateCounter.SynchronizeWith(Context.AnimInstanceProxy->GetUpdateCounter());
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BlendWeight = Context.GetFinalBlendWeight();
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// if (WarpingSpace == EOrientationWarpingSpace::RootBoneTransform)
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// {
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// if (UE::AnimationWarping::FRootOffsetProvider* RootOffsetProvider = Context.GetMessage<UE::AnimationWarping::FRootOffsetProvider>())
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// {
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// WarpingSpaceTransform = RootOffsetProvider->GetRootTransform();
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// }
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// else
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// {
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// WarpingSpaceTransform = Context.AnimInstanceProxy->GetComponentTransform();
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// }
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// }
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if (WarpingSpace == EOrientationWarpingSpace::ComponentTransform)
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{
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WarpingSpaceTransform = Context.AnimInstanceProxy->GetComponentTransform();
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}
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}
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void FGMS_AnimNode_OrientationWarping::EvaluateSkeletalControl_AnyThread(FComponentSpacePoseContext& Output, TArray<FBoneTransform>& OutBoneTransforms)
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{
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SCOPE_CYCLE_COUNTER(STAT_OrientationWarping_Eval);
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check(OutBoneTransforms.Num() == 0);
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float TargetOrientationAngleRad;
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const float DeltaSeconds = Output.AnimInstanceProxy->GetDeltaSeconds();
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const float MaxAngleCorrectionRad = FMath::DegreesToRadians(MaxCorrectionDegrees);
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const FVector RotationAxisVector = UE::Anim::GetAxisVector(RotationAxis);
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FVector LocomotionForward = FVector::ZeroVector;
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bool bGraphDrivenWarping = false;
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const UE::Anim::IAnimRootMotionProvider* RootMotionProvider = UE::Anim::IAnimRootMotionProvider::Get();
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if (Mode == EWarpingEvaluationMode::Graph)
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{
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bGraphDrivenWarping = !!RootMotionProvider;
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ensureMsgf(bGraphDrivenWarping, TEXT("Graph driven Orientation Warping expected a valid root motion delta provider interface."));
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}
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#if WITH_EDITORONLY_DATA
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bFoundRootMotionAttribute = false;
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#endif
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#if ENABLE_ANIM_DEBUG
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FTransform RootMotionTransformDelta = FTransform::Identity;
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float RootMotionDeltaAngleRad = 0.0;
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const float PreviousOrientationAngleRad = ActualOrientationAngleRad;
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#endif
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// We will likely need to revisit LocomotionAngle participating as an input to orientation warping.
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// Without velocity information from the motion model (such as the capsule), LocomotionAngle isn't enough
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// information in isolation for all cases when deciding to warp.
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//
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// For example imagine that the motion model has stopped moving with zero velocity due to a
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// transition into a strafing stop. During that transition we may play an animation with non-zero
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// velocity for an arbitrary number of frames. In this scenario the concept of direction is meaningless
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// since we cannot orient the animation to match a zero velocity and consequently a zero direction,
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// since that would break the pose. For those frames, we would incorrectly over-orient the strafe.
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//
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// The solution may be instead to pass velocity with the actor base rotation, allowing us to retain
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// speed information about the motion. It may also allow us to do more complex orienting behavior
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// when multiple degrees of freedom can be considered.
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if (WarpingSpace == EOrientationWarpingSpace::ComponentTransform)
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{
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WarpingSpaceTransform = Output.AnimInstanceProxy->GetComponentTransform();
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}
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if (bGraphDrivenWarping)
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{
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#if !ENABLE_ANIM_DEBUG
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FTransform RootMotionTransformDelta = FTransform::Identity;
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#endif
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bGraphDrivenWarping = RootMotionProvider->ExtractRootMotion(Output.CustomAttributes, RootMotionTransformDelta);
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// Graph driven orientation warping will modify the incoming root motion to orient towards the intended locomotion angle
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if (bGraphDrivenWarping)
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{
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#if WITH_EDITORONLY_DATA
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// Graph driven Orientation Warping expects a root motion delta to be present in the attribute stream.
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bFoundRootMotionAttribute = true;
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#endif
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// In UE, forward is defined as +x; consequently this is also true when sampling an actor's velocity. Historically the skeletal
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// mesh component forward will not match the actor, requiring us to correct the rotation before sampling the LocomotionForward.
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// In order to make orientation warping 'pure' in the future we will need to provide more context about the intent of
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// the actor vs the intent of the animation in their respective spaces. Specifically, we will need some form the following information:
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//
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// 1. Actor Forward
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// 2. Actor Velocity
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// 3. Skeletal Mesh Relative Rotation
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if (LocomotionDirection.SquaredLength() > UE_SMALL_NUMBER)
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{
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// if we have a LocomotionDirection vector, transform into root bone local space
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LocomotionForward = WarpingSpaceTransform.InverseTransformVector(LocomotionDirection);
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LocomotionForward.Normalize();
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}
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else
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{
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LocomotionAngle = FRotator::NormalizeAxis(LocomotionAngle);
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// UE-184297 Avoid storing LocomotionAngle in radians in case haven't updated the pinned input, to avoid a DegToRad(RadianValue)
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const float LocomotionAngleRadians = FMath::DegreesToRadians(LocomotionAngle);
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const FQuat LocomotionRotation = FQuat(RotationAxisVector, LocomotionAngleRadians);
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const FTransform SkeletalMeshRelativeTransform = Output.AnimInstanceProxy->GetComponentRelativeTransform();
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const FQuat SkeletalMeshRelativeRotation = SkeletalMeshRelativeTransform.GetRotation();
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LocomotionForward = SkeletalMeshRelativeRotation.UnrotateVector(LocomotionRotation.GetForwardVector()).GetSafeNormal();
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}
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// Flatten locomotion direction, along the rotation axis.
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LocomotionForward = (LocomotionForward - RotationAxisVector.Dot(LocomotionForward) * RotationAxisVector).GetSafeNormal();
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// @todo: Graph mode using a "manual value" makes no sense. Restructure logic to address this in the future.
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if (bUseManualRootMotionVelocity)
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{
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RootMotionTransformDelta.SetTranslation(ManualRootMotionVelocity * DeltaSeconds);
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}
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FVector RootMotionDeltaTranslation = RootMotionTransformDelta.GetTranslation();
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// Flatten root motion translation, along the rotation axis.
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RootMotionDeltaTranslation = RootMotionDeltaTranslation - RotationAxisVector.Dot(RootMotionDeltaTranslation) * RotationAxisVector;
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const float RootMotionDeltaSpeed = RootMotionDeltaTranslation.Size() / DeltaSeconds;
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if (RootMotionDeltaSpeed < MinRootMotionSpeedThreshold)
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{
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// If we're under the threshold, snap orientation angle to 0, and let interpolation handle the delta
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TargetOrientationAngleRad = 0.0f;
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}
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else
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{
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const FVector PreviousRootMotionDeltaDirection = RootMotionDeltaDirection;
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// Hold previous direction if we can't calculate it from current move delta, because the root is no longer moving
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RootMotionDeltaDirection = RootMotionDeltaTranslation.GetSafeNormal(UE_SMALL_NUMBER, PreviousRootMotionDeltaDirection);
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TargetOrientationAngleRad = UE::Anim::SignedAngleRadBetweenNormals(RootMotionDeltaDirection, LocomotionForward, RotationAxisVector);
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// Motion Matching may return an animation that deviates a lot from the movement direction (e.g movement direction going bwd and motion matching could return the fwd animation for a few frames)
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// When that happens, since we use the delta between root motion and movement direction, we would be over-rotating the lower body and breaking the pose during those frames
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// So, when that happens we use the inverse of the root motion direction to calculate our target rotation.
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// This feels a bit 'hacky' but its the only option I've found so far to mitigate the problem
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if (LocomotionAngleDeltaThreshold > 0.f)
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{
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if (FMath::Abs(FMath::RadiansToDegrees(TargetOrientationAngleRad)) > LocomotionAngleDeltaThreshold)
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{
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TargetOrientationAngleRad = FMath::UnwindRadians(TargetOrientationAngleRad + FMath::DegreesToRadians(180.0f));
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RootMotionDeltaDirection = -RootMotionDeltaDirection;
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}
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}
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// Don't compensate interpolation by the root motion angle delta if the previous angle isn't valid.
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if (bCounterCompenstateInterpolationByRootMotion && !PreviousRootMotionDeltaDirection.IsNearlyZero(UE_SMALL_NUMBER))
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{
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#if !ENABLE_ANIM_DEBUG
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float RootMotionDeltaAngleRad;
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#endif
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// Counter the interpolated orientation angle by the root motion direction angle delta.
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// This prevents our interpolation from fighting the natural root motion that's flowing through the graph.
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RootMotionDeltaAngleRad = UE::Anim::SignedAngleRadBetweenNormals(RootMotionDeltaDirection, PreviousRootMotionDeltaDirection, RotationAxisVector);
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// Root motion may have large deltas i.e. bad blends or sudden direction changes like pivots.
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// If there's an instantaneous pop in root motion direction, this is likely a pivot.
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const float MaxRootMotionDeltaToCompensateRad = FMath::DegreesToRadians(MaxRootMotionDeltaToCompensateDegrees);
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if (FMath::Abs(RootMotionDeltaAngleRad) < MaxRootMotionDeltaToCompensateRad)
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{
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ActualOrientationAngleRad = FMath::UnwindRadians(ActualOrientationAngleRad + RootMotionDeltaAngleRad);
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}
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}
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// Rotate the root motion delta fully by the warped angle
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const FVector WarpedRootMotionTranslationDelta = FQuat(RotationAxisVector, TargetOrientationAngleRad).RotateVector(RootMotionDeltaTranslation);
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RootMotionTransformDelta.SetTranslation(WarpedRootMotionTranslationDelta);
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}
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// Forward the side effects of orientation warping on the root motion contribution for this sub-graph
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const bool bRootMotionOverridden = RootMotionProvider->OverrideRootMotion(RootMotionTransformDelta, Output.CustomAttributes);
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ensureMsgf(bRootMotionOverridden, TEXT("Graph driven Orientation Warping expected a root motion delta to be present in the attribute stream prior to warping/overriding it."));
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}
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else
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{
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// Early exit on missing root motion delta attribute
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return;
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}
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}
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else
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{
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// Manual orientation warping will take the angle directly
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TargetOrientationAngleRad = FRotator::NormalizeAxis(OrientationAngle);
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TargetOrientationAngleRad = FMath::DegreesToRadians(TargetOrientationAngleRad);
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}
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// Optionally interpolate the effective orientation towards the target orientation angle
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// When the orientation warping node becomes relevant, the input pose orientation may not be aligned with the desired orientation.
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// Instead of interpolating this difference, snap to the desired orientation if it's our first update to minimize corrections over-time.
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if ((RotationInterpSpeed > 0.f) && !bIsFirstUpdate)
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{
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const float SmoothOrientationAngleRad = FMath::FInterpTo(ActualOrientationAngleRad, TargetOrientationAngleRad, DeltaSeconds, RotationInterpSpeed);
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// Limit our interpolation rate to prevent pops.
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// @TODO: Use better, more physically accurate interpolation here.
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ActualOrientationAngleRad = FMath::Clamp(SmoothOrientationAngleRad, ActualOrientationAngleRad - MaxAngleCorrectionRad, ActualOrientationAngleRad + MaxAngleCorrectionRad);
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}
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else
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{
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ActualOrientationAngleRad = TargetOrientationAngleRad;
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}
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ActualOrientationAngleRad = FMath::Clamp(ActualOrientationAngleRad, -MaxAngleCorrectionRad, MaxAngleCorrectionRad);
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// Allow the alpha value of the node to affect the final rotation
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ActualOrientationAngleRad *= ActualAlpha;
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if (bScaleByGlobalBlendWeight)
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{
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ActualOrientationAngleRad *= BlendWeight;
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}
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#if ENABLE_ANIM_DEBUG
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bool bDebugging = false;
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#if WITH_EDITORONLY_DATA
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bDebugging = bDebugging || bEnableDebugDraw;
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#else
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constexpr float DebugDrawScale = 1.f;
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#endif
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const int32 DebugIndex = CVarAnimNodeOrientationWarpingDebug.GetValueOnAnyThread();
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bDebugging = bDebugging || (DebugIndex > 0);
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if (bDebugging)
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{
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const FTransform ComponentTransform = Output.AnimInstanceProxy->GetComponentTransform();
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const FVector ActorForwardDirection = Output.AnimInstanceProxy->GetActorTransform().GetRotation().GetForwardVector();
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FVector DebugArrowOffset = FVector::ZAxisVector * DebugDrawScale;
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// Draw debug shapes
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{
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const FVector ForwardDirection = bGraphDrivenWarping
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? ComponentTransform.GetRotation().RotateVector(LocomotionForward)
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: ActorForwardDirection;
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Output.AnimInstanceProxy->AnimDrawDebugDirectionalArrow(
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ComponentTransform.GetLocation() + DebugArrowOffset,
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ComponentTransform.GetLocation() + DebugArrowOffset + ForwardDirection * 100.f * DebugDrawScale,
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40.f * DebugDrawScale, FColor::Red, false, 0.f, 2.f * DebugDrawScale);
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const FVector RotationDirection = bGraphDrivenWarping
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? ComponentTransform.GetRotation().RotateVector(RootMotionDeltaDirection)
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: ActorForwardDirection.RotateAngleAxis(OrientationAngle, RotationAxisVector);
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DebugArrowOffset += FVector::ZAxisVector * DebugDrawScale;
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Output.AnimInstanceProxy->AnimDrawDebugDirectionalArrow(
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ComponentTransform.GetLocation() + DebugArrowOffset,
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ComponentTransform.GetLocation() + DebugArrowOffset + RotationDirection * 100.f * DebugDrawScale,
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40.f * DebugDrawScale, FColor::Blue, false, 0.f, 2.f * DebugDrawScale);
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const float ActualOrientationAngleDegrees = FMath::RadiansToDegrees(ActualOrientationAngleRad);
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const FVector WarpedRotationDirection = bGraphDrivenWarping
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? RotationDirection.RotateAngleAxis(ActualOrientationAngleDegrees, RotationAxisVector)
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: ActorForwardDirection.RotateAngleAxis(ActualOrientationAngleDegrees, RotationAxisVector);
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DebugArrowOffset += FVector::ZAxisVector * DebugDrawScale;
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Output.AnimInstanceProxy->AnimDrawDebugDirectionalArrow(
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ComponentTransform.GetLocation() + DebugArrowOffset,
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ComponentTransform.GetLocation() + DebugArrowOffset + WarpedRotationDirection * 100.f * DebugDrawScale,
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40.f * DebugDrawScale, FColor::Green, false, 0.f, 2.f * DebugDrawScale);
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}
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// Draw text on mesh in world space
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{
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TStringBuilder<1024> DebugLine;
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const float PreviousOrientationAngleDegrees = FMath::RadiansToDegrees(PreviousOrientationAngleRad);
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const float ActualOrientationAngleDegrees = FMath::RadiansToDegrees(ActualOrientationAngleRad);
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const float TargetOrientationAngleDegrees = FMath::RadiansToDegrees(TargetOrientationAngleRad);
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if (Mode == EWarpingEvaluationMode::Manual)
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{
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DebugLine.Appendf(TEXT("\n - Previous Orientation Angle: (%.3fd)"), PreviousOrientationAngleDegrees);
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DebugLine.Appendf(TEXT("\n - Orientation Angle: (%.3fd)"), ActualOrientationAngleDegrees);
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DebugLine.Appendf(TEXT("\n - Target Orientation Angle: (%.3fd)"), TargetOrientationAngleRad);
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}
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else
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{
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if (RotationInterpSpeed > 0.0f)
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{
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DebugLine.Appendf(TEXT("\n - Previous Orientation Angle: (%.3fd)"), FMath::RadiansToDegrees(PreviousOrientationAngleRad));
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DebugLine.Appendf(TEXT("\n - Root Motion Frame Delta Angle: (%.3fd)"), FMath::RadiansToDegrees(RootMotionDeltaAngleRad));
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}
|
||||
DebugLine.Appendf(TEXT("\n - Actual Orientation Angle: (%.3fd)"), FMath::RadiansToDegrees(ActualOrientationAngleRad));
|
||||
DebugLine.Appendf(TEXT("\n - Target Orientation Angle: (%.3fd)"), FMath::RadiansToDegrees(TargetOrientationAngleRad));
|
||||
// Locomotion angle is already in degrees.
|
||||
DebugLine.Appendf(TEXT("\n - Locomotion Angle: (%.3fd)"), LocomotionAngle);
|
||||
DebugLine.Appendf(TEXT("\n - Root Motion Delta: %s)"), *RootMotionTransformDelta.GetTranslation().ToString());
|
||||
DebugLine.Appendf(TEXT("\n - Root Motion Speed: %.3fd)"), RootMotionTransformDelta.GetTranslation().Size() / DeltaSeconds);
|
||||
}
|
||||
Output.AnimInstanceProxy->AnimDrawDebugInWorldMessage(DebugLine.ToString(), FVector::UpVector * 50.0f, FColor::Yellow, 1.f /*TextScale*/);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
#if ANIM_TRACE_ENABLED
|
||||
{
|
||||
const float PreviousOrientationAngleDegrees = FMath::RadiansToDegrees(PreviousOrientationAngleRad);
|
||||
const float ActualOrientationAngleDegrees = FMath::RadiansToDegrees(ActualOrientationAngleRad);
|
||||
const float TargetOrientationAngleDegrees = FMath::RadiansToDegrees(TargetOrientationAngleRad);
|
||||
|
||||
TRACE_ANIM_NODE_VALUE(Output, TEXT("Previous OrientationAngle Degrees"), PreviousOrientationAngleDegrees);
|
||||
TRACE_ANIM_NODE_VALUE(Output, TEXT("Actual Orientation Angle Degrees"), ActualOrientationAngleDegrees);
|
||||
TRACE_ANIM_NODE_VALUE(Output, TEXT("Target Orientation Angle Degrees"), TargetOrientationAngleDegrees);
|
||||
|
||||
if (Mode == EWarpingEvaluationMode::Graph)
|
||||
{
|
||||
const float RootMotionDeltaAngleDegrees = FMath::RadiansToDegrees(RootMotionDeltaAngleRad);
|
||||
TRACE_ANIM_NODE_VALUE(Output, TEXT("Root Motion Delta Angle Degrees"), RootMotionDeltaAngleDegrees);
|
||||
TRACE_ANIM_NODE_VALUE(Output, TEXT("Locomotion Angle"), LocomotionAngle);
|
||||
TRACE_ANIM_NODE_VALUE(Output, TEXT("Root Motion Translation Delta"), RootMotionTransformDelta.GetTranslation());
|
||||
|
||||
const float RootMotionSpeed = RootMotionTransformDelta.GetTranslation().Size() / DeltaSeconds;
|
||||
TRACE_ANIM_NODE_VALUE(Output, TEXT("Root Motion Speed"), RootMotionSpeed);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
#if ENABLE_VISUAL_LOG
|
||||
if (FVisualLogger::IsRecording())
|
||||
{
|
||||
const FTransform ComponentTransform = Output.AnimInstanceProxy->GetComponentTransform();
|
||||
const FVector ActorForwardDirection = Output.AnimInstanceProxy->GetActorTransform().GetRotation().GetForwardVector();
|
||||
FVector DebugArrowOffset = FVector::ZAxisVector * DebugDrawScale;
|
||||
|
||||
// Draw debug shapes
|
||||
{
|
||||
const FVector ForwardDirection = bGraphDrivenWarping
|
||||
? ComponentTransform.GetRotation().RotateVector(LocomotionForward)
|
||||
: ActorForwardDirection;
|
||||
|
||||
UE_VLOG_ARROW(Output.AnimInstanceProxy->GetAnimInstanceObject(), "OrientationWarping", Display,
|
||||
ComponentTransform.GetLocation() + DebugArrowOffset,
|
||||
ComponentTransform.GetLocation() + DebugArrowOffset + ForwardDirection * 100.f * DebugDrawScale,
|
||||
FColor::Red, TEXT(""));
|
||||
|
||||
const FVector RotationDirection = bGraphDrivenWarping
|
||||
? ComponentTransform.GetRotation().RotateVector(RootMotionDeltaDirection)
|
||||
: ActorForwardDirection.RotateAngleAxis(OrientationAngle, RotationAxisVector);
|
||||
|
||||
DebugArrowOffset += FVector::ZAxisVector * DebugDrawScale;
|
||||
UE_VLOG_ARROW(Output.AnimInstanceProxy->GetAnimInstanceObject(), "OrientationWarping", Display,
|
||||
ComponentTransform.GetLocation() + DebugArrowOffset,
|
||||
ComponentTransform.GetLocation() + DebugArrowOffset + RotationDirection * 100.f * DebugDrawScale,
|
||||
FColor::Blue, TEXT(""));
|
||||
|
||||
const float ActualOrientationAngleDegrees = FMath::RadiansToDegrees(ActualOrientationAngleRad);
|
||||
const FVector WarpedRotationDirection = bGraphDrivenWarping
|
||||
? RotationDirection.RotateAngleAxis(ActualOrientationAngleDegrees, RotationAxisVector)
|
||||
: ActorForwardDirection.RotateAngleAxis(ActualOrientationAngleDegrees, RotationAxisVector);
|
||||
|
||||
DebugArrowOffset += FVector::ZAxisVector * DebugDrawScale;
|
||||
|
||||
UE_VLOG_ARROW(Output.AnimInstanceProxy->GetAnimInstanceObject(), "OrientationWarping", Display,
|
||||
ComponentTransform.GetLocation() + DebugArrowOffset,
|
||||
ComponentTransform.GetLocation() + DebugArrowOffset + WarpedRotationDirection * 100.f * DebugDrawScale,
|
||||
FColor::Green, TEXT(""));
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
const float RootOffset = FMath::UnwindRadians(ActualOrientationAngleRad * DistributedBoneOrientationAlpha);
|
||||
|
||||
// Rotate Root Bone first, as that cheaply rotates the whole pose with one transformation.
|
||||
if (!FMath::IsNearlyZero(RootOffset, KINDA_SMALL_NUMBER))
|
||||
{
|
||||
const FQuat RootRotation = FQuat(RotationAxisVector, RootOffset);
|
||||
const FCompactPoseBoneIndex RootBoneIndex(0);
|
||||
|
||||
FTransform RootBoneTransform(Output.Pose.GetComponentSpaceTransform(RootBoneIndex));
|
||||
RootBoneTransform.SetRotation(RootRotation * RootBoneTransform.GetRotation());
|
||||
RootBoneTransform.NormalizeRotation();
|
||||
Output.Pose.SetComponentSpaceTransform(RootBoneIndex, RootBoneTransform);
|
||||
}
|
||||
|
||||
const int32 NumSpineBones = SpineBoneDataArray.Num();
|
||||
const bool bSpineOrientationAlpha = !FMath::IsNearlyZero(DistributedBoneOrientationAlpha, KINDA_SMALL_NUMBER);
|
||||
const bool bUpdateSpineBones = (NumSpineBones > 0) && bSpineOrientationAlpha;
|
||||
|
||||
if (bUpdateSpineBones)
|
||||
{
|
||||
// Spine bones counter rotate body orientation evenly across all bones.
|
||||
for (int32 ArrayIndex = 0; ArrayIndex < NumSpineBones; ArrayIndex++)
|
||||
{
|
||||
const FOrientationWarpingSpineBoneData& BoneData = SpineBoneDataArray[ArrayIndex];
|
||||
const FQuat SpineBoneCounterRotation = FQuat(RotationAxisVector, -ActualOrientationAngleRad * DistributedBoneOrientationAlpha * BoneData.Weight);
|
||||
check(BoneData.Weight > 0.f);
|
||||
|
||||
FTransform SpineBoneTransform(Output.Pose.GetComponentSpaceTransform(BoneData.BoneIndex));
|
||||
SpineBoneTransform.SetRotation((SpineBoneCounterRotation * SpineBoneTransform.GetRotation()));
|
||||
SpineBoneTransform.NormalizeRotation();
|
||||
Output.Pose.SetComponentSpaceTransform(BoneData.BoneIndex, SpineBoneTransform);
|
||||
}
|
||||
}
|
||||
|
||||
const float IKFootRootOrientationAlpha = 1.f - DistributedBoneOrientationAlpha;
|
||||
const bool bUpdateIKFootRoot = (IKFootData.IKFootRootBoneIndex != FCompactPoseBoneIndex(INDEX_NONE)) && !FMath::IsNearlyZero(IKFootRootOrientationAlpha, KINDA_SMALL_NUMBER);
|
||||
|
||||
// Rotate IK Foot Root
|
||||
if (bUpdateIKFootRoot)
|
||||
{
|
||||
const FQuat BoneRotation = FQuat(RotationAxisVector, ActualOrientationAngleRad * IKFootRootOrientationAlpha);
|
||||
|
||||
FTransform IKFootRootTransform(Output.Pose.GetComponentSpaceTransform(IKFootData.IKFootRootBoneIndex));
|
||||
IKFootRootTransform.SetRotation(BoneRotation * IKFootRootTransform.GetRotation());
|
||||
IKFootRootTransform.NormalizeRotation();
|
||||
Output.Pose.SetComponentSpaceTransform(IKFootData.IKFootRootBoneIndex, IKFootRootTransform);
|
||||
|
||||
// IK Feet
|
||||
// These match the root orientation, so don't rotate them. Just preserve root rotation.
|
||||
// We need to update their translation though, since we rotated their parent (the IK Foot Root bone).
|
||||
const int32 NumIKFootBones = IKFootData.IKFootBoneIndexArray.Num();
|
||||
const bool bUpdateIKFootBones = bUpdateIKFootRoot && (NumIKFootBones > 0);
|
||||
|
||||
if (bUpdateIKFootBones)
|
||||
{
|
||||
const FQuat IKFootRotation = FQuat(RotationAxisVector, -ActualOrientationAngleRad * IKFootRootOrientationAlpha);
|
||||
|
||||
for (int32 ArrayIndex = 0; ArrayIndex < NumIKFootBones; ArrayIndex++)
|
||||
{
|
||||
const FCompactPoseBoneIndex& IKFootBoneIndex = IKFootData.IKFootBoneIndexArray[ArrayIndex];
|
||||
|
||||
FTransform IKFootBoneTransform(Output.Pose.GetComponentSpaceTransform(IKFootBoneIndex));
|
||||
IKFootBoneTransform.SetRotation(IKFootRotation * IKFootBoneTransform.GetRotation());
|
||||
IKFootBoneTransform.NormalizeRotation();
|
||||
Output.Pose.SetComponentSpaceTransform(IKFootBoneIndex, IKFootBoneTransform);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
OutBoneTransforms.Sort(FCompareBoneTransformIndex());
|
||||
bIsFirstUpdate = false;
|
||||
}
|
||||
|
||||
bool FGMS_AnimNode_OrientationWarping::IsValidToEvaluate(const USkeleton* Skeleton, const FBoneContainer& RequiredBones)
|
||||
{
|
||||
#if ENABLE_ANIM_DEBUG
|
||||
if (CVarAnimNodeOrientationWarpingEnable.GetValueOnAnyThread() == 0)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
#endif
|
||||
if (RotationAxis == EAxis::None)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
if (Mode == EWarpingEvaluationMode::Manual && UE::Anim::IsInvalidWarpingAngleDegrees(OrientationAngle, KINDA_SMALL_NUMBER))
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
if (SpineBoneDataArray.IsEmpty())
|
||||
{
|
||||
return false;
|
||||
}
|
||||
else
|
||||
{
|
||||
for (const auto& Spine : SpineBoneDataArray)
|
||||
{
|
||||
if (Spine.BoneIndex == INDEX_NONE)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (IKFootData.IKFootRootBoneIndex == INDEX_NONE)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
|
||||
if (IKFootData.IKFootBoneIndexArray.IsEmpty())
|
||||
{
|
||||
return false;
|
||||
}
|
||||
else
|
||||
{
|
||||
for (const auto& IKFootBoneIndex : IKFootData.IKFootBoneIndexArray)
|
||||
{
|
||||
if (IKFootBoneIndex == INDEX_NONE)
|
||||
{
|
||||
return false;
|
||||
}
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
void FGMS_AnimNode_OrientationWarping::InitializeBoneReferences(const FBoneContainer& RequiredBones)
|
||||
{
|
||||
ExternalBoneReference.IKFootRootBone.Initialize(RequiredBones);
|
||||
IKFootData.IKFootRootBoneIndex = ExternalBoneReference.IKFootRootBone.GetCompactPoseIndex(RequiredBones);
|
||||
|
||||
IKFootData.IKFootBoneIndexArray.Reset();
|
||||
for (auto& Bone : ExternalBoneReference.IKFootBones)
|
||||
{
|
||||
Bone.Initialize(RequiredBones);
|
||||
IKFootData.IKFootBoneIndexArray.Add(Bone.GetCompactPoseIndex(RequiredBones));
|
||||
}
|
||||
|
||||
SpineBoneDataArray.Reset();
|
||||
for (auto& Bone : ExternalBoneReference.SpineBones)
|
||||
{
|
||||
Bone.Initialize(RequiredBones);
|
||||
SpineBoneDataArray.Add(FOrientationWarpingSpineBoneData(Bone.GetCompactPoseIndex(RequiredBones)));
|
||||
}
|
||||
|
||||
if (SpineBoneDataArray.Num() > 0)
|
||||
{
|
||||
// Sort bones indices so we can transform parent before child
|
||||
SpineBoneDataArray.Sort(FOrientationWarpingSpineBoneData::FCompareBoneIndex());
|
||||
|
||||
// Assign Weights.
|
||||
TArray<int32, TInlineAllocator<20>> IndicesToUpdate;
|
||||
|
||||
for (int32 Index = SpineBoneDataArray.Num() - 1; Index >= 0; Index--)
|
||||
{
|
||||
// If this bone's weight hasn't been updated, scan its parents.
|
||||
// If parents have weight, we add it to 'ExistingWeight'.
|
||||
// split (1.f - 'ExistingWeight') between all members of the chain that have no weight yet.
|
||||
if (SpineBoneDataArray[Index].Weight == 0.f)
|
||||
{
|
||||
IndicesToUpdate.Reset(SpineBoneDataArray.Num());
|
||||
float ExistingWeight = 0.f;
|
||||
IndicesToUpdate.Add(Index);
|
||||
|
||||
const FCompactPoseBoneIndex CompactBoneIndex = SpineBoneDataArray[Index].BoneIndex;
|
||||
for (int32 ParentIndex = Index - 1; ParentIndex >= 0; ParentIndex--)
|
||||
{
|
||||
if (RequiredBones.BoneIsChildOf(CompactBoneIndex, SpineBoneDataArray[ParentIndex].BoneIndex))
|
||||
{
|
||||
if (SpineBoneDataArray[ParentIndex].Weight > 0.f)
|
||||
{
|
||||
ExistingWeight += SpineBoneDataArray[ParentIndex].Weight;
|
||||
}
|
||||
else
|
||||
{
|
||||
IndicesToUpdate.Add(ParentIndex);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
check(IndicesToUpdate.Num() > 0);
|
||||
const float WeightToShare = 1.f - ExistingWeight;
|
||||
const float IndividualWeight = WeightToShare / float(IndicesToUpdate.Num());
|
||||
|
||||
for (int32 UpdateListIndex = 0; UpdateListIndex < IndicesToUpdate.Num(); UpdateListIndex++)
|
||||
{
|
||||
SpineBoneDataArray[IndicesToUpdate[UpdateListIndex]].Weight = IndividualWeight;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void FGMS_AnimNode_OrientationWarping::Reset(const FAnimationBaseContext& Context)
|
||||
{
|
||||
bIsFirstUpdate = true;
|
||||
RootMotionDeltaDirection = FVector::ZeroVector;
|
||||
ManualRootMotionVelocity = FVector::ZeroVector;
|
||||
ActualOrientationAngleRad = 0.f;
|
||||
}
|
||||
Reference in New Issue
Block a user