UE4-动画/蒙太奇/融合(Animation/montage/blend)相关笔记

Q.定义状态机动画蓝图事件：

 

Q.Animation/Montage指定帧触发事件（Event）:

（注意：单帧动画需要取消勾选Teleport to Explicit Time，否则无法触发帧事件）

Q.C++自定义 Animation Blueprint（动画蓝图）

自己很少用C++写Skeleton动画相关的逻辑，通常Anim的BP满足大部分需求，最多继承一个UAnimInstance封装一个通用基类，很少去自定义anim节点

故留个C++实现备查.

Note:AnimGraph属于Edtior模块，如果需要打包,需要注意下build.cs：

https://github.com/Hethger/UE4_AnimGraphNode_Project_Template 

build.cs主要片段:

        if (Target.Type == TargetType.Editor)
        {
            PublicDependencyModuleNames.AddRange(
                new string[] 
                {
                    "UnrealED",
                    "BlueprintGraph",
                    "AnimGraph"
                });
        }

AnimInstance 栗子：

.h

UCLASS(transient, Blueprintable , hideCategories = AnimInstance, BlueprintType )
class BJ_3DDESIGNAPP_API UCppAnimation_Demonstrate : public UAnimInstance
{
    GENERATED_BODY()
public:
    //初始化虚函数
    virtual void NativeInitializeAnimation() override;
    //tick event 
    virtual void NativeUpdateAnimation(float DeltaTimeX) override;
protected:
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = "CppVariant")
        float Speed = 0.0f;
};

 .cpp

void UCppAnimation_Demonstrate::NativeInitializeAnimation()
{
    Super::NativeInitializeAnimation();
}

void UCppAnimation_Demonstrate::NativeUpdateAnimation(float DeltaTimeX)
{
    Super::NativeUpdateAnimation(DeltaTimeX);
　　//你的逻辑

}

Q.C++自定义 Animation Graph Node （动画节点）

　　需要C++自定义动画节点的话，需要分别实现UAnimGraphNode_Base，和FAnimNode_Base的子类；

　　UAnimGraphNode_Base用于在Editor里的定义一些节点的属性（如颜色/Category 名称/节点名等）

　　FAnimNode_Base 里实现我们自己的动画逻辑

　栗子（PS:例子是没有实现任何功能的）：

AnimNode：

.h

#pragma once

#include "CoreMinimal.h"
#include "Animation/AnimNodeBase.h"
#include "CppAnimNode_Demonstrate.generated.h"

USTRUCT(BlueprintType)
struct BJ_3DDESIGNAPP_API FCppAnimNode_Demonstrate : public FAnimNode_Base
{
    GENERATED_USTRUCT_BODY()

public:
    UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Links)
        FPoseLink BasePose;
public:
    virtual void Initialize_AnyThread(const FAnimationInitializeContext& Context) override;
    virtual void CacheBones_AnyThread(const FAnimationCacheBonesContext& Context) override;
    virtual void Update_AnyThread(const FAnimationUpdateContext& Context) override;
    virtual void Evaluate_AnyThread(FPoseContext& Output) override;
    virtual void GatherDebugData(FNodeDebugData& DebugData) override;

// Constructor 
public:
    FCppAnimNode_Demonstrate();
};

.cpp

#include "CppAnimNode_Demonstrate.h"

FCppAnimNode_Demonstrate::FCppAnimNode_Demonstrate()
{
}

void FCppAnimNode_Demonstrate::Initialize_AnyThread(const FAnimationInitializeContext & Context)
{
    BasePose.Initialize(Context);
}

void FCppAnimNode_Demonstrate::CacheBones_AnyThread(const FAnimationCacheBonesContext & Context)
{
    BasePose.CacheBones(Context);
}

void FCppAnimNode_Demonstrate::Update_AnyThread(const FAnimationUpdateContext & Context)
{
    EvaluateGraphExposedInputs.Execute(Context);
    BasePose.Update(Context);
}

void FCppAnimNode_Demonstrate::Evaluate_AnyThread(FPoseContext & Output)
{
    BasePose.Evaluate(Output);
}

void FCppAnimNode_Demonstrate::GatherDebugData(FNodeDebugData & DebugData)
{
    FString DebugLine = DebugData.GetNodeName(this);

    DebugData.AddDebugItem(DebugLine);

    BasePose.GatherDebugData(DebugData);
}

AnimGraphNode：

.h

#pragma once

#include "CoreMinimal.h"
#include "AnimGraphNode_Base.h"
#include "CppAnimNode_Demonstrate.h"
#include "CppAnimGraphNode_Demonstrate.generated.h"

UCLASS()
class BJ_3DDESIGNAPP_API UCppAnimGraphNode_Demonstrate : public UAnimGraphNode_Base
{
    GENERATED_UCLASS_BODY()

private:
    //注意，自定义的Anim Node类，逻辑都在里面
    UPROPERTY(EditAnywhere, Category = "Settings")
        FCppAnimNode_Demonstrate Node;
public:
    //节点颜色
    virtual FLinearColor GetNodeTitleColor() const override;
    //提示内容
    virtual FText GetTooltipText() const override;
    //节点名称
    virtual FText GetNodeTitle(ENodeTitleType::Type TitleType) const override;
    //Category 分类名称
    virtual FString GetNodeCategory() const override;
};

.cpp

#include "CppAnimGraphNode_Demonstrate.h"

#define LOCTEXT_NAMESPACE "LQ"

UCppAnimGraphNode_Demonstrate::UCppAnimGraphNode_Demonstrate(const FObjectInitializer& ObjectInitializer)
    :Super(ObjectInitializer)
{
}

FLinearColor UCppAnimGraphNode_Demonstrate::GetNodeTitleColor() const
{
    return FLinearColor::Green;
}

FText UCppAnimGraphNode_Demonstrate::GetTooltipText() const
{
    return LOCTEXT("hello_ue4_animation ", "hello_ue4_animation ");
}

FText UCppAnimGraphNode_Demonstrate::GetNodeTitle(ENodeTitleType::Type TitleType) const
{
    return LOCTEXT("HandleCharacterHeight", "HandleCharacterHeight");
}

FString UCppAnimGraphNode_Demonstrate::GetNodeCategory() const
{
    return TEXT("CppCustomNode");
}

#undef LOCTEXT_NAMESPACE

 

Q.C++ 自定义State machine（状态机）

　　wait