void FAnimNode_AbilityAnimPlayer::UpdateAssetPlayer(const FAnimationUpdateContext& Context)
{
EvaluateGraphExposedInputs.Execute(Context);
if (m_SequenceToPlay && m_SequenceToPlay->SequenceLength - InternalTimeAccumulator < KINDA_SMALL_NUMBER)
{
if (m_NextSequence)
{
SwapToNextSequence();
}
else
{
m_SequenceToPlay = nullptr;
}
}
if (m_SequenceToPlay && Context.AnimInstanceProxy->IsSkeletonCompatible(m_SequenceToPlay->GetSkeleton()))
{
if (m_NextSequence && m_NextSequenceBlendIn.IsComplete())
{
SwapToNextSequence();
}
InternalTimeAccumulator = FMath::Clamp(InternalTimeAccumulator, 0.f, m_SequenceToPlay->SequenceLength);
if (m_NextSequence)
{
m_NextSequenceBlendIn.Update(Context.GetDeltaTime());
m_NextSequenceInternalTimeAccumulator += Context.GetDeltaTime();
m_NextSequenceInternalTimeAccumulator = FMath::Clamp(m_NextSequenceInternalTimeAccumulator, 0.0f, m_NextSequence->SequenceLength);
}
if (FAnimInstanceProxy* Proxy = Context.AnimInstanceProxy)
{
FAnimGroupInstance* SyncGroup;
FAnimTickRecord& SequenceTickRecord = Proxy->CreateUninitializedTickRecord(NAME_None, SyncGroup);
float CurrentBlendValue = m_NextSequenceBlendIn.GetBlendedValue();
float SequenceBlendRate = m_NextSequence ? 1.0f - CurrentBlendValue : 1.0f;
Proxy->MakeSequenceTickRecord(SequenceTickRecord, const_cast<UAnimSequence*>(m_SequenceToPlay), false, m_PlayRate, SequenceBlendRate, InternalTimeAccumulator, MarkerTickRecord);
if (m_NextSequence)
{
FAnimTickRecord& NextSequenceTickRecord = Proxy->CreateUninitializedTickRecord(NAME_None, SyncGroup);
Proxy->MakeSequenceTickRecord(NextSequenceTickRecord, const_cast<UAnimSequence*>(m_NextSequence), false, m_NextPlayRate, CurrentBlendValue, m_NextSequenceInternalTimeAccumulator, m_NextSequenceMarkerTickRecord);
}
}
//CreateTickRecordForNode(Context, const_cast<UAnimSequence*>(m_SequenceToPlay), false, m_PlayRate);
}
else if (m_CachedOutputSequence && Context.AnimInstanceProxy->IsSkeletonCompatible(m_CachedOutputSequence->GetSkeleton()))
{
InternalTimeAccumulator = FMath::Clamp(InternalTimeAccumulator, 0.0f, m_CachedOutputSequence->SequenceLength);
if (FAnimInstanceProxy* Proxy = Context.AnimInstanceProxy)
{
FAnimGroupInstance* SyncGroup;
FAnimTickRecord& SequenceTickRecord = Proxy->CreateUninitializedTickRecord(NAME_None, SyncGroup);
Proxy->MakeSequenceTickRecord(SequenceTickRecord, const_cast<UAnimSequence*>(m_CachedOutputSequence), false, m_PlayRate, 1.0, InternalTimeAccumulator, MarkerTickRecord);
}
}
}
void FAnimationActiveTransitionEntry::Update(const FAnimationUpdateContext& Context, int32 CurrentStateIndex, bool& bOutFinished)
{
bOutFinished = false;
// Advance time
if (bActive)
{
ElapsedTime += Context.GetDeltaTime();
Blend.Update(Context.GetDeltaTime());
float QueryAlpha = 1.0f;
// If non-zero, calculate the query alpha
if (CrossfadeDuration > 0.0f)
{
QueryAlpha = ElapsedTime / CrossfadeDuration;
}
Alpha = FAlphaBlend::AlphaToBlendOption(QueryAlpha, Blend.GetBlendOption(), Blend.GetCustomCurve());
if(Blend.IsComplete())
{
bActive = false;
bOutFinished = true;
}
// Update state blend data (only when we're using per-bone)
if(BlendProfile)
{
for(int32 Idx = 0 ; Idx < 2 ; ++Idx)
{
bool bForwards = Idx == 0;
FBlendSampleData& CurrentData = StateBlendData[Idx];
CurrentData.TotalWeight = (bForwards) ? Alpha : 1.0f - Alpha;
for(int32 PerBoneIndex = 0 ; PerBoneIndex < CurrentData.PerBoneBlendData.Num() ; ++PerBoneIndex)
{
float& BoneBlend = CurrentData.PerBoneBlendData[PerBoneIndex];
float WeightScale = BlendProfile->GetEntryBlendScale(PerBoneIndex);
if(!bForwards)
{
WeightScale = 1.0f / WeightScale;
}
BoneBlend = CurrentData.TotalWeight * WeightScale;
}
}
FBlendSampleData::NormalizeDataWeight(StateBlendData);
}
}
}
void FAnimationActiveTransitionEntry::Update(const FAnimationUpdateContext& Context, int32 CurrentStateIndex, bool& bOutFinished)
{
bOutFinished = false;
// Advance time
if (bActive)
{
ElapsedTime += Context.GetDeltaTime();
if (ElapsedTime >= CrossfadeDuration)
{
bActive = false;
bOutFinished = true;
}
if(CrossfadeDuration <= 0.0f)
{
Alpha = 1.0f;
}
else
{
Alpha = CalculateAlpha(ElapsedTime / CrossfadeDuration);
}
}
}
void FAnimNode_SpringBone::Update(const FAnimationUpdateContext& Context)
{
FAnimNode_SkeletalControlBase::Update(Context);
RemainingTime += Context.GetDeltaTime();
const USkeletalMeshComponent* SkelComp = Context.AnimInstance->GetSkelMeshComponent();
const UWorld* World = SkelComp->GetWorld();
check(World->GetWorldSettings());
// Fixed step simulation at 120hz
FixedTimeStep = (1.f / 120.f) * World->GetWorldSettings()->GetEffectiveTimeDilation();
}
void FAnimNode_Trail::Update(const FAnimationUpdateContext& Context)
{
FAnimNode_SkeletalControlBase::Update(Context);
ThisTimstep = Context.GetDeltaTime();
}
void FAnimNode_LookAt::Update(const FAnimationUpdateContext& Context)
{
FAnimNode_SkeletalControlBase::Update(Context);
AccumulatedInterpoolationTime = FMath::Clamp(AccumulatedInterpoolationTime+Context.GetDeltaTime(), 0.f, InterpolationTime);;
}
void FAnimNode_StateMachine::Update(const FAnimationUpdateContext& Context)
{
if (FBakedAnimationStateMachine* Machine = GetMachineDescription())
{
if (Machine->States.Num() == 0)
{
return;
}
}
else
{
return;
}
SCOPE_CYCLE_COUNTER(STAT_AnimStateMachineUpdate);
bool bFoundValidTransition = false;
int32 TransitionCountThisFrame = 0;
int32 TransitionIndex = INDEX_NONE;
// Look for legal transitions to take; can move across multiple states in one frame (up to MaxTransitionsPerFrame)
do
{
bFoundValidTransition = false;
FAnimationPotentialTransition PotentialTransition;
{
SCOPE_CYCLE_COUNTER(STAT_AnimStateMachineFindTransition);
// Evaluate possible transitions out of this state
//@TODO: Evaluate if a set is better than an array for the probably low N encountered here
TArray<int32, TInlineAllocator<4>> VisitedStateIndices;
FindValidTransition(Context, GetStateInfo(), /*Out*/ PotentialTransition, /*Out*/ VisitedStateIndices);
}
// If transition is valid and not waiting on other conditions
if (PotentialTransition.IsValid())
{
bFoundValidTransition = true;
// let the latest transition know it has been interrupted
if ((ActiveTransitionArray.Num() > 0) && ActiveTransitionArray[ActiveTransitionArray.Num()-1].bActive)
{
Context.AnimInstance->AddAnimNotifyFromGeneratedClass(ActiveTransitionArray[ActiveTransitionArray.Num()-1].InterruptNotify);
}
const int32 PreviousState = CurrentState;
const int32 NextState = PotentialTransition.TargetState;
// Fire off Notifies for state transition
if (!bFirstUpdate)
{
Context.AnimInstance->AddAnimNotifyFromGeneratedClass(GetStateInfo(PreviousState).EndNotify);
Context.AnimInstance->AddAnimNotifyFromGeneratedClass(GetStateInfo(NextState).StartNotify);
}
// Get the current weight of the next state, which may be non-zero
const float ExistingWeightOfNextState = GetStateWeight(NextState);
// Push the transition onto the stack
const FAnimationTransitionBetweenStates& ReferenceTransition = GetTransitionInfo(PotentialTransition.TransitionRule->TransitionIndex);
FAnimationActiveTransitionEntry* NewTransition = new (ActiveTransitionArray) FAnimationActiveTransitionEntry(NextState, ExistingWeightOfNextState, PreviousState, ReferenceTransition);
NewTransition->InitializeCustomGraphLinks(Context, *(PotentialTransition.TransitionRule));
#if WITH_EDITORONLY_DATA
NewTransition->SourceTransitionIndices = PotentialTransition.SourceTransitionIndices;
#endif
if (!bFirstUpdate)
{
Context.AnimInstance->AddAnimNotifyFromGeneratedClass(NewTransition->StartNotify);
}
SetState(Context, NextState);
TransitionCountThisFrame++;
}
}
while (bFoundValidTransition && (TransitionCountThisFrame < MaxTransitionsPerFrame));
if (bFirstUpdate)
{
//Handle enter notify for "first" (after initial transitions) state
Context.AnimInstance->AddAnimNotifyFromGeneratedClass(GetStateInfo().StartNotify);
// in the first update, we don't like to transition from entry state
// so we throw out any transition data at the first update
ActiveTransitionArray.Reset();
bFirstUpdate = false;
}
StatesUpdated.Empty(StatesUpdated.Num());
// Tick the individual state/states that are active
if (ActiveTransitionArray.Num() > 0)
{
for (int32 Index = 0; Index < ActiveTransitionArray.Num(); ++Index)
{
// The custom graph will tick the needed states
bool bFinishedTrans = false;
// The custom graph will tick the needed states
ActiveTransitionArray[Index].Update(Context, CurrentState, /*out*/ bFinishedTrans);
if (bFinishedTrans)
{
// only play these events if it is the last transition (most recent, going to current state)
if (Index == (ActiveTransitionArray.Num() - 1))
{
Context.AnimInstance->AddAnimNotifyFromGeneratedClass(ActiveTransitionArray[Index].EndNotify);
Context.AnimInstance->AddAnimNotifyFromGeneratedClass(GetStateInfo().FullyBlendedNotify);
}
}
else
{
// transition is still active, so tick the required states
UpdateTransitionStates(Context, ActiveTransitionArray[Index]);
}
}
// remove finished transitions here, newer transitions ending means any older ones must complete as well
for (int32 Index = (ActiveTransitionArray.Num()-1); Index >= 0; --Index)
{
// if we find an inactive one, remove all older transitions and break out
if (!ActiveTransitionArray[Index].bActive)
{
ActiveTransitionArray.RemoveAt(0, Index+1);
break;
}
}
}
//@TODO: StatesUpdated.Contains is a linear search
// Update the only active state if there are no transitions still in flight
if (ActiveTransitionArray.Num() == 0 && !IsAConduitState(CurrentState) && !StatesUpdated.Contains(CurrentState))
{
StatePoseLinks[CurrentState].Update(Context);
}
ElapsedTime += Context.GetDeltaTime();
}
void FAnimNode_AnimDynamics::UpdateInternal(const FAnimationUpdateContext& Context)
{
FAnimNode_SkeletalControlBase::UpdateInternal(Context);
NextTimeStep = Context.GetDeltaTime();
}
void FAnimNode_BlendListBase::Update(const FAnimationUpdateContext& Context)
{
EvaluateGraphExposedInputs.Execute(Context);
const int NumPoses = BlendPose.Num();
checkSlow((BlendTime.Num() == NumPoses) && (BlendWeights.Num() == NumPoses));
if (NumPoses > 0)
{
// Handle a change in the active child index; adjusting the target weights
const int32 ChildIndex = GetActiveChildIndex();
if (ChildIndex != LastActiveChildIndex)
{
bool LastChildIndexIsInvalid = (LastActiveChildIndex == INDEX_NONE);
LastActiveChildIndex = ChildIndex;
const float CurrentWeight = BlendWeights[ChildIndex];
const float DesiredWeight = 1.0f;
const float WeightDifference = FMath::Clamp<float>(FMath::Abs<float>(DesiredWeight - CurrentWeight), 0.0f, 1.0f);
// scale by the weight difference since we want always consistency:
// - if you're moving from 0 to full weight 1, it will use the normal blend time
// - if you're moving from 0.5 to full weight 1, it will get there in half the time
const float RemainingBlendTime = LastChildIndexIsInvalid ? 0.0f : ( BlendTime[ChildIndex] * WeightDifference );
for (int32 i = 0; i < RemainingBlendTimes.Num(); ++i)
{
RemainingBlendTimes[i] = RemainingBlendTime;
}
}
// Advance the weights
//@TODO: This means we advance even in a frame where the target weights/times just got modified; is that desirable?
float SumWeight = 0.0f;
for (int32 i = 0; i < RemainingBlendTimes.Num(); ++i)
{
float& RemainingBlendTime = RemainingBlendTimes[i];
float& BlendWeight = BlendWeights[i];
const float DesiredWeight = (i == ChildIndex) ? 1.0f : 0.0f;
FAnimationRuntime::TickBlendWeight(Context.GetDeltaTime(), DesiredWeight, BlendWeight, RemainingBlendTime);
SumWeight += BlendWeight;
}
// Renormalize the weights
if ((SumWeight > ZERO_ANIMWEIGHT_THRESH) && (FMath::Abs<float>(SumWeight - 1.0f) > ZERO_ANIMWEIGHT_THRESH))
{
float ReciprocalSum = 1.0f / SumWeight;
for (int32 i = 0; i < BlendWeights.Num(); ++i)
{
BlendWeights[i] *= ReciprocalSum;
}
}
// Update our active children
for (int32 i = 0; i < BlendPose.Num(); ++i)
{
const float BlendWeight = BlendWeights[i];
if (BlendWeight > ZERO_ANIMWEIGHT_THRESH)
{
BlendPose[i].Update(Context.FractionalWeight(BlendWeight));
}
}
}
}
