98 lines
6.2 KiB
Markdown
98 lines
6.2 KiB
Markdown
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## 前言
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之前使用GameplayTasks的事件处理会出现延迟问题。具体体现在如果使用机制来添加BlockAbilityTag，在狂按技能的情况下会出现Tag不能正常生成导致可以不停ActivateAbility的问题。
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## 问题成因
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1. 问题的原因就是使用GameplayTasks不能即时添加GE，会有一定延迟。
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2. 清除GameplayEffect方式有问题，应该使用只清除该技能所附加的GE。
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## 解决思路
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在解决清除GE问题的情况下：
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1. GASDocument中的解决方法：使用AbilityTag作为BlockAbilityTag，之后通过AnimNotify发送EndAbility事件Tag，提前结束Ability。（不会结束掉Montage播放）
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2. 在AnimNotifyBegin函数中直接添加GE，根据TotalDuration设置持续时间。（但如果Montage突然被中断，就很难操作了，而且这样会与Ability耦合）
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3. 增加公共CD（测试过效果不佳）
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## PlayMontage修改
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1. 传递事件使用专门的Event.Montage.xxxx作为事件标签
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2. 重写AnimNotify的GetNotifyName函数，使用标签名作为AnimNotify的显示名称。
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```
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void UGDGA_FireGun::EventReceived(FGameplayTag EventTag, FGameplayEventData EventData)
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{
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// Montage told us to end the ability before the montage finished playing.
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// Montage was set to continue playing animation even after ability ends so this is okay.
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if (EventTag == FGameplayTag::RequestGameplayTag(FName("Event.Montage.EndAbility")))
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{
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EndAbility(CurrentSpecHandle, CurrentActorInfo, CurrentActivationInfo, true, false);
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return;
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}
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// Only spawn projectiles on the Server.
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// Predicting projectiles is an advanced topic not covered in this example.
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if (GetOwningActorFromActorInfo()->GetLocalRole() == ROLE_Authority && EventTag == FGameplayTag::RequestGameplayTag(FName("Event.Montage.SpawnProjectile")))
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{
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AGDHeroCharacter* Hero = Cast<AGDHeroCharacter>(GetAvatarActorFromActorInfo());
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if (!Hero)
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{
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EndAbility(CurrentSpecHandle, CurrentActorInfo, CurrentActivationInfo, true, true);
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}
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FVector Start = Hero->GetGunComponent()->GetSocketLocation(FName("Muzzle"));
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FVector End = Hero->GetCameraBoom()->GetComponentLocation() + Hero->GetFollowCamera()->GetForwardVector() * Range;
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FRotator Rotation = UKismetMathLibrary::FindLookAtRotation(Start, End);
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FGameplayEffectSpecHandle DamageEffectSpecHandle = MakeOutgoingGameplayEffectSpec(DamageGameplayEffect, GetAbilityLevel());
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// Pass the damage to the Damage Execution Calculation through a SetByCaller value on the GameplayEffectSpec
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DamageEffectSpecHandle.Data.Get()->SetSetByCallerMagnitude(FGameplayTag::RequestGameplayTag(FName("Data.Damage")), Damage);
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FTransform MuzzleTransform = Hero->GetGunComponent()->GetSocketTransform(FName("Muzzle"));
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MuzzleTransform.SetRotation(Rotation.Quaternion());
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MuzzleTransform.SetScale3D(FVector(1.0f));
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FActorSpawnParameters SpawnParameters;
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SpawnParameters.SpawnCollisionHandlingOverride = ESpawnActorCollisionHandlingMethod::AlwaysSpawn;
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AGDProjectile* Projectile = GetWorld()->SpawnActorDeferred<AGDProjectile>(ProjectileClass, MuzzleTransform, GetOwningActorFromActorInfo(),
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Hero, ESpawnActorCollisionHandlingMethod::AlwaysSpawn);
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Projectile->DamageEffectSpecHandle = DamageEffectSpecHandle;
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Projectile->Range = Range;
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Projectile->FinishSpawning(MuzzleTransform);
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}
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}
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```
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```
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/** Apply a gameplay effect to the owner of this ability */
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UFUNCTION(BlueprintCallable, Category = Ability, DisplayName="ApplyGameplayEffectToOwner", meta=(ScriptName="ApplyGameplayEffectToOwner"))
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FActiveGameplayEffectHandle BP_ApplyGameplayEffectToOwner(TSubclassOf<UGameplayEffect> GameplayEffectClass, int32 GameplayEffectLevel = 1, int32 Stacks = 1);
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/** Non blueprintcallable, safe to call on CDO/NonInstance abilities */
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FActiveGameplayEffectHandle ApplyGameplayEffectToOwner(const FGameplayAbilitySpecHandle Handle, const FGameplayAbilityActorInfo* ActorInfo, const FGameplayAbilityActivationInfo ActivationInfo, const UGameplayEffect* GameplayEffect, float GameplayEffectLevel, int32 Stacks = 1) const;
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/** Apply a previously created gameplay effect spec to the owner of this ability */
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UFUNCTION(BlueprintCallable, Category = Ability, DisplayName = "ApplyGameplayEffectSpecToOwner", meta=(ScriptName = "ApplyGameplayEffectSpecToOwner"))
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FActiveGameplayEffectHandle K2_ApplyGameplayEffectSpecToOwner(const FGameplayEffectSpecHandle EffectSpecHandle);
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FActiveGameplayEffectHandle ApplyGameplayEffectSpecToOwner(const FGameplayAbilitySpecHandle AbilityHandle, const FGameplayAbilityActorInfo* ActorInfo, const FGameplayAbilityActivationInfo ActivationInfo, const FGameplayEffectSpecHandle SpecHandle) const;
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// -------------------------------------
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// Apply Gameplay effects to Target
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// -------------------------------------
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/** Apply a gameplay effect to a Target */
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UFUNCTION(BlueprintCallable, Category = Ability, DisplayName = "ApplyGameplayEffectToTarget", meta=(ScriptName = "ApplyGameplayEffectToTarget"))
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TArray<FActiveGameplayEffectHandle> BP_ApplyGameplayEffectToTarget(FGameplayAbilityTargetDataHandle TargetData, TSubclassOf<UGameplayEffect> GameplayEffectClass, int32 GameplayEffectLevel = 1, int32 Stacks = 1);
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/** Non blueprintcallable, safe to call on CDO/NonInstance abilities */
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TArray<FActiveGameplayEffectHandle> ApplyGameplayEffectToTarget(const FGameplayAbilitySpecHandle Handle, const FGameplayAbilityActorInfo* ActorInfo, const FGameplayAbilityActivationInfo ActivationInfo, const FGameplayAbilityTargetDataHandle& Target, TSubclassOf<UGameplayEffect> GameplayEffectClass, float GameplayEffectLevel, int32 Stacks = 1) const;
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/** Apply a previously created gameplay effect spec to a target */
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UFUNCTION(BlueprintCallable, Category = Ability, DisplayName = "ApplyGameplayEffectSpecToTarget", meta=(ScriptName = "ApplyGameplayEffectSpecToTarget"))
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TArray<FActiveGameplayEffectHandle> K2_ApplyGameplayEffectSpecToTarget(const FGameplayEffectSpecHandle EffectSpecHandle, FGameplayAbilityTargetDataHandle TargetData);
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TArray<FActiveGameplayEffectHandle> ApplyGameplayEffectSpecToTarget(const FGameplayAbilitySpecHandle AbilityHandle, const FGameplayAbilityActorInfo* ActorInfo, const FGameplayAbilityActivationInfo ActivationInfo, const FGameplayEffectSpecHandle SpecHandle, const FGameplayAbilityTargetDataHandle& TargetData) const;
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```
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