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虚幻引擎5 GAS开发俯视角RPG游戏 P07-07 激活能力

news 2025/11/8 9:21:26

目标:在输入回调函数里,激活能力

1.技能类添加输入标签:

// 版权归陈超所有#pragma once#include "CoreMinimal.h"
#include "Abilities/GameplayAbility.h"
#include "CC_GameplayAbility.generated.h"/*** */
UCLASS()
class CC_AURA_API UCC_GameplayAbility : public UGameplayAbility
{GENERATED_BODY()public:UPROPERTY(EditDefaultsOnly, Category= "CC|Input")FGameplayTag StartupInputTag;		//启动能力标签};

2.我们在玩家控制类中调用能力系统组件里的方法,来激活能力

(1)得到能力系统组件

Source/CC_Aura/Public/Player/CC_PlayerController.h

	UPROPERTY()TObjectPtr<UCC_AbilitySystemComponent> CC_AbilitySystemComponent;		//能力系统组件UCC_AbilitySystemComponent* GetCC_AbilitySystemComponent();

Source/CC_Aura/Private/Player/CC_PlayerController.cpp:

UCC_AbilitySystemComponent* ACC_PlayerController::GetCC_AbilitySystemComponent()
{if (CC_AbilitySystemComponent == nullptr){UAbilitySystemComponent* AbilitySystemComponent = UAbilitySystemBlueprintLibrary::GetAbilitySystemComponent(GetPawn<APawn>());CC_AbilitySystemComponent = Cast<UCC_AbilitySystemComponent>(AbilitySystemComponent);}return CC_AbilitySystemComponent;
}

(2)激活能力:

Source/CC_Aura/Private/Player/CC_PlayerController.cpp:

/*开始按下*/
void ACC_PlayerController::AbilityInputTagPressed(FGameplayTag InputTag)
{// GEngine->AddOnScreenDebugMessage(1, 3.f, FColor::Red, *InputTag.ToString());
}/*释放*/
void ACC_PlayerController::AbilityInputTagReleased(FGameplayTag InputTag)
{if (GetCC_AbilitySystemComponent() == nullptr) return;GetCC_AbilitySystemComponent()->AbilityInputTagReleased(InputTag);
}/*保持*/
void ACC_PlayerController::AbilityInputTagHold(FGameplayTag InputTag)
{if (GetCC_AbilitySystemComponent() == nullptr) return;GetCC_AbilitySystemComponent()->AbilityInputTagHeld(InputTag);
}

3.在能力系统组件里创建方法:

Source/CC_Aura/Public/AbilitySystem/CC_AbilitySystemComponent.h:

	void AbilityInputTagHeld(const FGameplayTag& InputTag);			//按键保持void AbilityInputTagReleased(const FGameplayTag& InputTag);		//按键释放

方法实现:

Source/CC_Aura/Private/AbilitySystem/CC_AbilitySystemComponent.cpp:

void UCC_AbilitySystemComponent::AbilityInputTagHeld(const FGameplayTag& InputTag)
{if (!InputTag.IsValid()) return;for (FGameplayAbilitySpec& AbilitySpec : GetActivatableAbilities()){if (!AbilitySpec.DynamicAbilityTags.HasTagExact(InputTag)) continue;AbilitySpecInputPressed(AbilitySpec);		//通知输入按下了if (!AbilitySpec.IsActive()){TryActivateAbility(AbilitySpec.Handle);		}}
}void UCC_AbilitySystemComponent::AbilityInputTagReleased(const FGameplayTag& InputTag)
{if (!InputTag.IsValid()) return;for (FGameplayAbilitySpec& AbilitySpec : GetActivatableAbilities()){if (!AbilitySpec.DynamicAbilityTags.HasTagExact(InputTag)) continue;AbilitySpecInputReleased(AbilitySpec);		//通知输入释放了}
}

其中:

/** Direct Input state replication. These will be called if bReplicateInputDirectly is true on the ability and is generally not a good thing to use. (Instead, prefer to use Generic Replicated Events). */UFUNCTION(Server, reliable, WithValidation)void ServerSetInputPressed(FGameplayAbilitySpecHandle AbilityHandle);UFUNCTION(Server, reliable, WithValidation)void ServerSetInputReleased(FGameplayAbilitySpecHandle AbilityHandle);/** Called on local player always. Called on server only if bReplicateInputDirectly is set on the GameplayAbility. */virtual void AbilitySpecInputPressed(FGameplayAbilitySpec& Spec);/** Called on local player always. Called on server only if bReplicateInputDirectly is set on the GameplayAbility. */virtual void AbilitySpecInputReleased(FGameplayAbilitySpec& Spec);

这段代码是Unreal Engine中Gameplay Ability System (GAS)的输入处理相关函数，主要用于处理游戏能力的输入同步。

‌函数功能说明：‌

‌ServerSetInputPressed‌ - 服务器RPC函数，当客户端按下能力输入时调用，将输入状态同步到服务器
‌ServerSetInputReleased‌ - 服务器RPC函数，当客户端释放能力输入时调用
‌AbilitySpecInputPressed‌ - 本地输入按下处理函数，在本地玩家始终调用，服务器端仅在bReplicateInputDirectly为true时调用
‌AbilitySpecInputReleased‌ - 本地输入释放处理函数，调用规则同上

‌架构特点：‌