UE4【C++】【播放声音、特效、伤害、子弹、蒙太奇动作】

柔光的暖阳◎ 2023-02-21 11:55 100阅读 0赞

if (IsAmmoEmpty && !IsReloading)
    	{
    		//Play Empty Sound
    		USoundBase* EmptyAmmoSound = MuzzleConfig.EmptyAmmoSound.Get();
    		if (!IsValid(EmptyAmmoSound))
    		{
    			EmptyAmmoSound = MuzzleConfig.EmptyAmmoSound.LoadSynchronous();
    		}
    		UGameplayStatics::PlaySoundAtLocation(GetWorld(), EmptyAmmoSound, PistolMeshRef->GetComponentLocation());
    
    		//Play Anim Montage
    		UAnimMontage* EmptyAmmoMontage = UUtilFunctionLibrary::GetAnimMontageFromAssetID(MuzzleConfig.EmptyAmmoMontage);
    		UAnimInstance* PistolAnim = PistolMeshRef->GetAnimInstance();
    		if (IsValid(PistolAnim))
    		{
    			if (PistolAnim->Montage_IsActive(EmptyAmmoMontage))
    			{
    				PistolAnim->Montage_SetPlayRate(EmptyAmmoMontage, 1.0f);
    
    				if (false == PistolAnim->Montage_IsPlaying(EmptyAmmoMontage))
    				{
    					PistolAnim->Montage_Resume(EmptyAmmoMontage);
    				}
    			}
    			else
    			{
    				FAlphaBlend AlphaBlend;
    				AlphaBlend.SetBlendTime(0.2f);
    				AlphaBlend.SetBlendOption(EAlphaBlendOption::Linear);
    				EmptyAmmoMontage->BlendIn = AlphaBlend;
    				EmptyAmmoMontage->BlendOut = AlphaBlend;
    				float AnimMontageSecond = PistolAnim->Montage_Play(EmptyAmmoMontage);
    			}
    		}
    		return;
    	}
    	if (!IsShootDelayComplete || IsReloading)
    	{
    		return;
    	}
    	FLatentActionInfo LatentActionInfo;
    	LatentActionInfo.ExecutionFunction = FName("ShootingDelay");
    	LatentActionInfo.CallbackTarget = this;
    	LatentActionInfo.UUID = 2;
    	LatentActionInfo.Linkage = 0;
    	UKismetSystemLibrary::Delay(GetWorld(), MuzzleConfig.FireDelay, LatentActionInfo);
    	IsShootDelayComplete = false;
    	LeftAmmoNum -= 1;
    	SetLeftAmmoValue(LeftAmmoNum, TotalAmmoNum);
    	if (IsShootState)
    	{
    		//Emitter Muzzle Fx
    		UParticleSystem* ShootFx = MuzzleConfig.ShootFx.Get();
    		if (!IsValid(ShootFx))
    		{
    			ShootFx = MuzzleConfig.ShootFx.LoadSynchronous();
    		}
    		UGameplayStatics::SpawnEmitterAttached(ShootFx, PistolMeshRef, "Muzzle", FVector::ZeroVector, FRotator::ZeroRotator, EAttachLocation::KeepRelativeOffset);
    		
    		//Play Shell Fx
    		UParticleSystem* ShellFx = MuzzleConfig.ShellFx.Get();
    		if (!IsValid(ShellFx))
    		{
    			ShellFx = MuzzleConfig.ShellFx.LoadSynchronous();
    		}
    		UGameplayStatics::SpawnEmitterAttached(ShellFx, PistolMeshRef, "Shells", FVector::ZeroVector, FRotator::ZeroRotator, EAttachLocation::KeepRelativeOffset);
    
    		//Play Shoot Sound
    		USoundBase* ShootSound = MuzzleConfig.ShootSound.Get();
    		if (!IsValid(ShootSound))
    		{
    			ShootSound = MuzzleConfig.ShootSound.LoadSynchronous();
    		}
    		UGameplayStatics::PlaySoundAtLocation(GetWorld(), ShootSound, PistolMeshRef->GetComponentLocation());
    
    		//Play Shell Sound
    		USoundBase* ShellSound = MuzzleConfig.ShellSound.Get();
    		if (!IsValid(ShellSound))
    		{
    			ShellSound = MuzzleConfig.ShootSound.LoadSynchronous();
    		}
    		UGameplayStatics::PlaySoundAtLocation(GetWorld(), ShellSound, PistolMeshRef->GetComponentLocation());
    
    		//Apply Damage
    		FHitResult  hitResult(ForceInit);
    		FVector start = FirstPersonCamera->GetComponentLocation();
    		FVector end = start + FirstPersonCamera->GetForwardVector() * 1000000.0f;
    		FCollisionQueryParams TraceParams;
    		TraceParams.bTraceComplex = false;
    		TraceParams.AddIgnoredActor(this);
    		bool hit = GetWorld()->LineTraceSingleByChannel(hitResult, start, end, ECC_GameTraceChannel2, TraceParams);
    		if (hit)
    		{
    			AActor* hitActor = hitResult.Actor.Get();
    			if (IsValid(hitActor))
    			{
    				UGameplayStatics::ApplyDamage(hitActor, 1.0f, HostController, this, UDamageType::StaticClass());
    			}
    		}
    
    		//Spawn Projectile
    		USkeletalMeshSocket const* BoneSocket = PistolMeshRef->GetSocketByName("Muzzle");
    		if (IsValid(BoneSocket))
    		{
    			UClass* ProjectileClass = UFLUtils::LoadClassEx<UClass>("/Game/ThirdContent/MPS_V2/Game/Blueprints/Projectile_BP.Projectile_BP_C");
    			if (IsValid(ProjectileClass))
    			{
    				FTransform BoneTrans = BoneSocket->GetSocketTransform(PistolMeshRef);
    				FQuat Quat = BoneTrans.GetRotation();
    				FRotator Rotation = Quat.Rotator();
    				float Pitch = FirstPersonCamera->GetComponentRotation().Pitch;
    				FVector Forward = FirstPersonCamera->GetForwardVector();
    				Rotation = Forward.Rotation();
    				AActor* Projectile = SCPGAMEINSTANCE(this)->GetWorld()->SpawnActor<AActor>(ProjectileClass, BoneTrans.GetLocation(), Rotation);
    			}
    		}
    
    		//Play Anim Montage
    		UAnimMontage* ShootMontage = UUtilFunctionLibrary::GetAnimMontageFromAssetID(MuzzleConfig.ShootMontage);
    		UAnimInstance* PistolAnim = PistolMeshRef->GetAnimInstance();
    		if (IsValid(PistolAnim))
    		{
    			if (PistolAnim->Montage_IsActive(ShootMontage))
    			{
    				PistolAnim->Montage_SetPlayRate(ShootMontage, 1.0f);
    
    				if (false == PistolAnim->Montage_IsPlaying(ShootMontage))
    				{
    					PistolAnim->Montage_Resume(ShootMontage);
    				}
    			}
    			else
    			{
    				FAlphaBlend AlphaBlend;
    				AlphaBlend.SetBlendTime(0.2f);
    				AlphaBlend.SetBlendOption(EAlphaBlendOption::Linear);
    				ShootMontage->BlendIn = AlphaBlend;
    				ShootMontage->BlendOut = AlphaBlend;
    				float AnimMontageSecond = PistolAnim->Montage_Play(ShootMontage);
    			}
    		}
    		if (MuzzleConfig.CameraShakeEffect.Num() > 0)
    		{
    			CameraShake(ShootShake, MuzzleConfig.CameraShakeEffect[0], 1.0f);
    		}		
    	}