48 lines
2.3 KiB
Markdown
48 lines
2.3 KiB
Markdown
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---
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title: UE5 Lyra学习笔记(3)—GAS
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date: 2022-08-09 13:55:20
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tags: Lyra Gameplay
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rating: ⭐️⭐️
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---
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# LyraGame
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主要逻辑集中在这个模块与插件中，本文先解析GAS相关与GameFeature的逻辑。
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UWorldSubsystem：实现了ULyraAudioMixEffectsSubsystem、
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- LyraGameplayTags：实现单例类 FLyraGameplayTags来管理GAS相关标签。感觉不如使用JSON导入DataTable Asset的方式来管理GameplayTag来得方便。
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- LyraLogChannels：实现LogLyra、LogLyraExperience、LogLyraAbilitySystem、LogLyraTeams日志标签，以及 返回网络Role字符串函数。
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## AbilitySystem
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- Abilities
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- Interaction
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- Inventory
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- Player
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- Weapons
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- UI
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### Abilities
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#### LyraGameplayAbility
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- 实现5个ActorInfo获取函数：GetLyraAbilitySystemComponentFromActorInfo、GetLyraPlayerControllerFromActorInfo、GetControllerFromActorInfo、GetLyraCharacterFromActorInfo、GetHeroComponentFromActorInfo。
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定义ELyraAbilityActivationPolicy与ELyraAbilityActivationGroup枚举，并在类内的定义枚举变量与取值函数。用于，
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c++中实现：
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- ULyraGameplayAbility_Death：执行类型为ServerInitiated，逻辑为能力激活与结束时，调用角色的ULyraHealthComponent的StartDeath()与FinishDeath()。
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- ULyraGameplayAbility_Jump：执行类型为LocalPredicted，调用角色的Jump()、UnCrouch()、StopJumping()。
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- ULyraGameplayAbility_Reset：执行类型为ServerInitiated，角色复活时调用的能力，将各个属性恢复成初始值,调用角色Reset()；之后通过UGameplayMessageSubsystem广播FLyraPlayerResetMessage消息。会在GAS组件接收到**GameplayEvent.RequestReset**事件时激活。
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#### Animation
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ULyraAnimInstance：针对GAS进行了定制：定义**FGameplayTagBlueprintPropertyMap**变量。可以在AnimBP中添加**FGameplayTagBlueprintPropertyMapping**，主要作用是：
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- NativeInitializeAnimation：获取Actor的GAS组件，用于给FGameplayTagBlueprintPropertyMap变量进行初始化。
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- NativeUpdateAnimation：获取Actor的Movement组件，通过GetGroundInfo()来获取Actor到地面的距离，来给类的GroundDistance变量赋值。
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- IsDataValid：用判断AnimBP Asset以及GameplayTagPropertyMap变量是否有效。
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### GameFeatures
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Lyra中实现的
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#### GameFeatureAction
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#### GameModes
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#### Input
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