ue4音效、动画结合实例

2022-09-27 10:35:07

在游戏中，许多音效需要在动画恰当的时机出现，例如行走、奔跑，就需要恰好在足部落地瞬间播放。

而AnimNotify就能非常方便地处理此类问题。

AnimNotify，顾名思义就是动画通知，能在特定的动画片段播放到特定进度时“发出消息”。

目前我们的工程有前、后、左、右、左前、右前、左后、右后八向的跑动动画。

先以向前跑为例,用右键添加通知的方式，分别在右脚、左脚落地时添加了lfoot_touchground与rfoot_touchground的两个自定义通知

当然直接添加playsound通知也是可以的，能很方便地直接设置声音，但为了功能的可扩展性我们还是使用自定义通知。

然而我们如何才能获取这些通知呢？

if (mesh) {

        UAnimInstance* anim=mesh->GetAnimInstance();

        if (anim) {

            TArray<const struct FAnimNotifyEvent*> AnimNotifies=anim->NotifyQueue.AnimNotifies;

            range(i,,AnimNotifies.Num()) {

                FString NotifyName=AnimNotifies[i]->NotifyName.ToString();

                /*GEngine->A/ddOnScreenDebugMessage

                (-1, 5.f, FColor::Red, FString::FromInt(i)+" "+ NotifyName);*/

                if (NotifyName=="lfoot_touchground") {

                    audio_lfoot->SetSound(sb_walks[]);

                    audio_lfoot->Play();

                }

                else if (NotifyName == "rfoot_touchground") {

                    audio_rfoot->SetSound(sb_walks[]);

                    audio_rfoot->Play();

                }

                else {

                }

            }

        }

    }

没错，就是这么简单anim->NotifyQueue即为动画通知队列,AnimNotifies就能获取当前所有通知事件，上述代码去掉注释即可打印当前帧所有动画通知名称。

为了实现播放音效，我们还需要绑定在左右脚的AudioComponent，如果当前通知队列中有对应的通知，就先SetSound设置将要播放的声音资源后再Play。

我把所有需要绑定在Chracter的Mesh上的AudioComponent“打包装入“了一个叫AudioController的类，在Character的构造函数中进行了AudioController的构造，并将AudioController中的各音效组件绑定到对应的socket上。

AudioController.h文件

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "Components/ActorComponent.h"

#include "Components/AudioComponent.h"

#include "Components/SkeletalMeshComponent.h"

#include "AudioController.generated.h"

UCLASS( ClassGroup=(Custom), meta=(BlueprintSpawnableComponent) )

class MYSOUNDANDEFFECTS_API UAudioController : public UActorComponent

{

    GENERATED_BODY()

public:

    // Sets default values for this component's properties

    UAudioController();

    //UAudioController(USkeletalMeshComponent* mesh_);

protected:

    // Called when the game starts

    virtual void BeginPlay() override;

public:

    // Called every frame

    virtual void TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction) override;

    UPROPERTY(Category = Audio, VisibleDefaultsOnly, BlueprintReadOnly, meta = (AllowPrivateAccess = "true"))

        UAudioComponent* audio_lfoot = NULL;

    UPROPERTY(Category = Audio, EditDefaultsOnly, BlueprintReadOnly, meta = (AllowPrivateAccess = "true"))

        FString bonename_lfoot = "Bip01-L-Foot";

    UPROPERTY(Category = Audio, VisibleDefaultsOnly, BlueprintReadOnly, meta = (AllowPrivateAccess = "true"))

        UAudioComponent* audio_rfoot = NULL;

    UPROPERTY(Category = Audio, EditDefaultsOnly, BlueprintReadOnly, meta = (AllowPrivateAccess = "true"))

        FString bonename_rfoot = "Bip01-R-Foot";

    USkeletalMeshComponent* mesh = NULL;

    void my_init(USkeletalMeshComponent* mesh_);

    UPROPERTY(Category = Audio, EditDefaultsOnly, BlueprintReadOnly, meta = (AllowPrivateAccess = "true"))

        TArray<class USoundBase*> sb_walks;

};

AudioController.cpp文件

// Fill out your copyright notice in the Description page of Project Settings.

#include "MySoundAndEffects.h"

#include "Animation/AnimInstance.h"

#include "AudioController.h"

// Sets default values for this component's properties

UAudioController::UAudioController()

{

    // Set this component to be initialized when the game starts, and to be ticked every frame.  You can turn these features

    // off to improve performance if you don't need them.

    PrimaryComponentTick.bCanEverTick = true;

    // ...

    audio_lfoot = CreateDefaultSubobject<UAudioComponent>("audio_lfoot");

    audio_rfoot = CreateDefaultSubobject<UAudioComponent>("audio_rfoot");

}

//UAudioController::UAudioController(USkeletalMeshComponent* mesh_)

//{

//    // Set this component to be initialized when the game starts, and to be ticked every frame.  You can turn these features

//    // off to improve performance if you don't need them.

//    PrimaryComponentTick.bCanEverTick = true;

//

//    // ...

//

//

//

//}

void UAudioController::my_init(USkeletalMeshComponent* mesh_) {

    this->mesh = mesh_;

    //UAudioController();

    audio_lfoot->SetupAttachment(mesh_, FName(*bonename_lfoot));

    audio_rfoot->SetupAttachment(mesh_, FName(*bonename_rfoot));

}

// Called when the game starts

void UAudioController::BeginPlay()

{

    Super::BeginPlay();

    // ...

}

// Called every frame

void UAudioController::TickComponent(float DeltaTime, ELevelTick TickType, FActorComponentTickFunction* ThisTickFunction)

{

    Super::TickComponent(DeltaTime, TickType, ThisTickFunction);

    // ...

    if (mesh) {

        UAnimInstance* anim=mesh->GetAnimInstance();

        if (anim) {

            TArray<const struct FAnimNotifyEvent*> AnimNotifies=anim->NotifyQueue.AnimNotifies;

            range(i,,AnimNotifies.Num()) {

                FString NotifyName=AnimNotifies[i]->NotifyName.ToString();

                /*GEngine->A/ddOnScreenDebugMessage

                (-1, 5.f, FColor::Red, FString::FromInt(i)+" "+ NotifyName);*/

                if (NotifyName=="lfoot_touchground") {

                    audio_lfoot->SetSound(sb_walks[]);

                    audio_lfoot->Play();

                }

                else if (NotifyName == "rfoot_touchground") {

                    audio_rfoot->SetSound(sb_walks[]);

                    audio_rfoot->Play();

                }

                else {

                }

            }

        }

    }

    else {

        throw std::exception("mesh not exist!!");

    }

}

还有character类中audiocontroller的定义和创建：

AAimPraticeHuman::AAimPraticeHuman()

{

#ifdef AudioController_h

	audiocontroller = CreateDefaultSubobject<UAudioController>("audiocontroller");

	audiocontroller->my_init(GetMesh());

#endif

}

UPROPERTY(Category = Audio, VisibleDefaultsOnly, BlueprintReadOnly, meta = (AllowPrivateAccess = "true"))
  class UAudioController* audiocontroller = NULL;

最后就是音效导入，看似简单其实有很多细节。