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05-SDHGame/ActionRPG时代的设计/李双模块笔记.md

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+## InputBufferConponent
+绑定输入。输入命令队列。
+IsTransitimtCache，如果有Pool里有对应命令就会切换到下一个State。
+
+### SDHInputCommandActionMap
+- Has Order：解析Command是否按键顺序。
+- InputActionCommandType：在LCMDates.h定义。
+- ButtonAction：在LCMDates.h定义。
+
+## StateMachine
+Transition每帧都会检测。
+
+- EnableButtonActionBufferBlockMap：该状态可以启用的命令
+- ResetButtonActionBufferBlockMapState：将所有命令都设置为禁止。
+- CacheCommandTransmitter：将命令加到Pool中。
+
+## 我的想法
+因为大部分StateMachine都和GAS会有关联（GASTag与GAS属性判断），所以我希望：
+1. 在OnStartStateMachine中先获取GAS组件。
+2. 在编辑器模式下，检测StateGraph中的StateABility是否都已经想GAS组件注册。（有的时候会忘记）
+3. 监控Ability是否结束，以及控制Ability结束。BP_SDHSkillStateIns
+4. 
+5. 
+6. 之后使用 	FGameplayAbilityEndedDelegate OnAbilityEnded;。
+
+
+```c++
+/** Allow events to be registered for specific gameplay tags being added or removed */
+FOnGameplayEffectTagCountChanged& RegisterGameplayTagEvent(FGameplayTag Tag, EGameplayTagEventType::Type EventType=EGameplayTagEventType::NewOrRemoved);
+
+/** Unregister previously added events */
+void UnregisterGameplayTagEvent(FDelegateHandle DelegateHandle, FGameplayTag Tag, EGameplayTagEventType::Type EventType=EGameplayTagEventType::NewOrRemoved);
+
+/** Register a tag event and immediately call it */
+FDelegateHandle RegisterAndCallGameplayTagEvent(FGameplayTag Tag, FOnGameplayEffectTagCountChanged::FDelegate Delegate, EGameplayTagEventType::Type EventType=EGameplayTagEventType::NewOrRemoved);
+
+/** Returns multicast delegate that is invoked whenever a tag is added or removed (but not if just count is increased. Only for 'new' and 'removed' events) */
+FOnGameplayEffectTagCountChanged& RegisterGenericGameplayTagEvent();
+
+/** Executes a gameplay event. Returns the number of successful ability activations triggered by the event */
+virtual int32 HandleGameplayEvent(FGameplayTag EventTag, const FGameplayEventData* Payload);
+```
+1. 监听StateAbility的Ability结束。方法有2：1、绑定GAS组件的OnAbilityEnded委托。2、重写EndAbility函数。
+
+```c++
+bool UAbilitySystemComponent::TryActivateAbilityByClass(TSubclassOf<UGameplayAbility> InAbilityToActivate, bool bAllowRemoteActivation)
+{
+	bool bSuccess = false;
+
+	const UGameplayAbility* const InAbilityCDO = InAbilityToActivate.GetDefaultObject();
+
+	for (const FGameplayAbilitySpec& Spec : ActivatableAbilities.Items)
+	{
+		if (Spec.Ability == InAbilityCDO)
+		{
+			bSuccess |= TryActivateAbility(Spec.Handle, bAllowRemoteActivation);
+			break;
+		}
+	}
+
+	return bSuccess;
+}
+
+bool UAbilitySystemComponent::TryActivateAbility(FGameplayAbilitySpecHandle AbilityToActivate, bool bAllowRemoteActivation)
+```
+```
+void UAbilitySystemComponent::NotifyAbilityEnded(FGameplayAbilitySpecHandle Handle, UGameplayAbility* Ability, bool bWasCancelled)
+```