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100 lines
2.9 KiB
C++
100 lines
2.9 KiB
C++
// Copyright 1998-2019 Epic Games, Inc. All Rights Reserved.
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#include "AnimNodes/AnimNode_ApplyAdditive.h"
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#include "AnimationRuntime.h"
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#include "Animation/AnimInstanceProxy.h"
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/////////////////////////////////////////////////////
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// FAnimNode_ApplyAdditive
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void FAnimNode_ApplyAdditive::Initialize_AnyThread(const FAnimationInitializeContext& Context)
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{
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FAnimNode_Base::Initialize_AnyThread(Context);
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Base.Initialize(Context);
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Additive.Initialize(Context);
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AlphaBoolBlend.Reinitialize();
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AlphaScaleBiasClamp.Reinitialize();
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}
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void FAnimNode_ApplyAdditive::CacheBones_AnyThread(const FAnimationCacheBonesContext& Context)
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{
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Base.CacheBones(Context);
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Additive.CacheBones(Context);
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}
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void FAnimNode_ApplyAdditive::Update_AnyThread(const FAnimationUpdateContext& Context)
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{
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Base.Update(Context);
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ActualAlpha = 0.f;
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if (IsLODEnabled(Context.AnimInstanceProxy))
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{
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// @note: If you derive from this class, and if you have input that you rely on for base
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// this is not going to work
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GetEvaluateGraphExposedInputs().Execute(Context);
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switch (AlphaInputType)
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{
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case EAnimAlphaInputType::Float:
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ActualAlpha = AlphaScaleBias.ApplyTo(AlphaScaleBiasClamp.ApplyTo(Alpha, Context.GetDeltaTime()));
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break;
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case EAnimAlphaInputType::Bool:
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ActualAlpha = AlphaBoolBlend.ApplyTo(bAlphaBoolEnabled, Context.GetDeltaTime());
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break;
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case EAnimAlphaInputType::Curve:
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if (UAnimInstance* AnimInstance = Cast<UAnimInstance>(Context.AnimInstanceProxy->GetAnimInstanceObject()))
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{
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ActualAlpha = AlphaScaleBiasClamp.ApplyTo(AnimInstance->GetCurveValue(AlphaCurveName), Context.GetDeltaTime());
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}
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break;
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};
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if (FAnimWeight::IsRelevant(ActualAlpha))
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{
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Additive.Update(Context.FractionalWeight(ActualAlpha));
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}
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}
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}
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void FAnimNode_ApplyAdditive::Evaluate_AnyThread(FPoseContext& Output)
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{
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//@TODO: Could evaluate Base into Output and save a copy
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if (FAnimWeight::IsRelevant(ActualAlpha))
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{
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const bool bExpectsAdditivePose = true;
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FPoseContext AdditiveEvalContext(Output, bExpectsAdditivePose);
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Base.Evaluate(Output);
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Additive.Evaluate(AdditiveEvalContext);
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FAnimationRuntime::AccumulateAdditivePose(Output.Pose, AdditiveEvalContext.Pose, Output.Curve, AdditiveEvalContext.Curve, ActualAlpha, AAT_LocalSpaceBase);
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Output.Pose.NormalizeRotations();
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}
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else
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{
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Base.Evaluate(Output);
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}
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}
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FAnimNode_ApplyAdditive::FAnimNode_ApplyAdditive()
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: Alpha(1.0f)
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, LODThreshold(INDEX_NONE)
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, AlphaCurveName(NAME_None)
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, ActualAlpha(0.f)
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, AlphaInputType(EAnimAlphaInputType::Float)
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, bAlphaBoolEnabled(true)
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{
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}
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void FAnimNode_ApplyAdditive::GatherDebugData(FNodeDebugData& DebugData)
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{
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FString DebugLine = DebugData.GetNodeName(this);
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DebugLine += FString::Printf(TEXT("(Alpha: %.1f%%)"), ActualAlpha*100.f);
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DebugData.AddDebugItem(DebugLine);
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Base.GatherDebugData(DebugData.BranchFlow(1.f));
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Additive.GatherDebugData(DebugData.BranchFlow(ActualAlpha));
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}
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