197 lines
7.6 KiB
Markdown
197 lines
7.6 KiB
Markdown
---
|
||
title: Untitled
|
||
date: 2024-01-29 13:23:24
|
||
excerpt:
|
||
tags:
|
||
rating: ⭐
|
||
---
|
||
# 前言
|
||
相关函数主要为：
|
||
- AbilitySystemComponent->BindToInputComponent()：只绑定名称为AbilityConfirm与AbilityCancel的InputAction。
|
||
- AbilitySystemComponent->BindAbilityActivationToInputComponent()：输入InputComponent、FGameplayAbilityInputBinds、FTopLevelAssetPath（枚举类路径）、枚举ID，之后绑定GA与Input。
|
||
- AbilitySystemComponent->SetBlockAbilityBindingsArray()：设置Block列表。
|
||
|
||
# GAS
|
||
BindAbilityActivationToInputComponent()的绑定方式如果ASC在Character中，可以在SetupPlayerInputComponent()中进行绑定：
|
||
```c
|
||
// Bind to AbilitySystemComponent
|
||
FTopLevelAssetPath AbilityEnumAssetPath = FTopLevelAssetPath(FName("/Script/GASDocumentation"), FName("EGDAbilityInputID"));
|
||
AbilitySystemComponent->BindAbilityActivationToInputComponent(PlayerInputComponent, FGameplayAbilityInputBinds(FString("ConfirmTarget"),
|
||
FString("CancelTarget"), AbilityEnumAssetPath, static_cast<int32>(EGDAbilityInputID::Confirm), static_cast<int32>(EGDAbilityInputID::Cancel)));
|
||
```
|
||
|
||
其内部主要是类似这样的方式进行绑定：
|
||
```c++
|
||
// Pressed event
|
||
{
|
||
FInputActionBinding AB(FName(*FullStr), IE_Pressed);
|
||
AB.ActionDelegate.GetDelegateForManualSet().BindUObject(this, &UAbilitySystemComponent::AbilityLocalInputPressed, idx);
|
||
InputComponent->AddActionBinding(AB);
|
||
}
|
||
|
||
// Released event
|
||
{
|
||
FInputActionBinding AB(FName(*FullStr), IE_Released);
|
||
AB.ActionDelegate.GetDelegateForManualSet().BindUObject(this, &UAbilitySystemComponent::AbilityLocalInputReleased, idx);
|
||
InputComponent->AddActionBinding(AB);
|
||
}
|
||
```
|
||
|
||
AbilityLocalInputPressed()与AbilityLocalInputReleased()会执行：
|
||
1. 触发多播委托
|
||
2. TryActivateAbility() 或者 AbilitySpecInputPressed()。
|
||
|
||
感觉可以自己实现一个BindAbilityActivationToInputComponent()的绑定逻辑，ASC自带的逻辑有点2。
|
||
GAS使用的是**InputComponent->AddActionBinding**，而增强输入使用**PlayerEnhancedInputComponent->BindAction**。本质是一样的。
|
||
```c++
|
||
FInputActionBinding& BindAction( const FName ActionName, const EInputEvent KeyEvent, UserClass* Object, typename FInputActionHandlerSignature::TMethodPtr< UserClass > Func )
|
||
{
|
||
FInputActionBinding AB( ActionName, KeyEvent );
|
||
AB.ActionDelegate.BindDelegate(Object, Func);
|
||
return AddActionBinding(MoveTemp(AB));
|
||
}
|
||
```
|
||
|
||
## 绑定输入而不激活能力
|
||
如果您不希望`GameplayAbilities`在按下输入时自动激活，但仍将它们绑定到输入以与 一起使用`AbilityTasks`，则可以向您的`UGameplayAbility`子类添加一个新的 bool 变量`bActivateOnInput`，该变量默认为`true`并覆盖`UAbilitySystemComponent::AbilityLocalInputPressed()`。
|
||
```c
|
||
void UGSAbilitySystemComponent::AbilityLocalInputPressed(int32 InputID)
|
||
{
|
||
// Consume the input if this InputID is overloaded with GenericConfirm/Cancel and the GenericConfim/Cancel callback is bound
|
||
if (IsGenericConfirmInputBound(InputID))
|
||
{
|
||
LocalInputConfirm();
|
||
return;
|
||
}
|
||
|
||
if (IsGenericCancelInputBound(InputID))
|
||
{
|
||
LocalInputCancel();
|
||
return;
|
||
}
|
||
|
||
// ---------------------------------------------------------
|
||
|
||
ABILITYLIST_SCOPE_LOCK();
|
||
for (FGameplayAbilitySpec& Spec : ActivatableAbilities.Items)
|
||
{
|
||
if (Spec.InputID == InputID)
|
||
{
|
||
if (Spec.Ability)
|
||
{
|
||
Spec.InputPressed = true;
|
||
if (Spec.IsActive())
|
||
{
|
||
if (Spec.Ability->bReplicateInputDirectly && IsOwnerActorAuthoritative() == false)
|
||
{
|
||
ServerSetInputPressed(Spec.Handle);
|
||
}
|
||
|
||
AbilitySpecInputPressed(Spec);
|
||
|
||
// Invoke the InputPressed event. This is not replicated here. If someone is listening, they may replicate the InputPressed event to the server.
|
||
InvokeReplicatedEvent(EAbilityGenericReplicatedEvent::InputPressed, Spec.Handle, Spec.ActivationInfo.GetActivationPredictionKey());
|
||
}
|
||
else
|
||
{
|
||
UGSGameplayAbility* GA = Cast<UGSGameplayAbility>(Spec.Ability);
|
||
if (GA && GA->bActivateOnInput)
|
||
{
|
||
// Ability is not active, so try to activate it
|
||
TryActivateAbility(Spec.Handle);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
```
|
||
|
||
# 暂时需要使用GAS默认的枚举绑定Input的理由
|
||
GameplayAbilitySpec.h的InputPressed：
|
||
```c++
|
||
UPROPERTY(NotReplicated)
|
||
uint8 InputPressed:1;
|
||
```
|
||
|
||
该变量用于本地输入判断，可以使用自己的代码代替，但涉及到以下几个函数，工作量比较大。
|
||
- UAbilitySystemComponent
|
||
- AbilityLocalInputReleased
|
||
- AbilitySpecInputPressed
|
||
- InternalServerTryActivateAbility
|
||
- InternalTryActivateAbility
|
||
- TryActivateAbility
|
||
- 间接关系
|
||
- BindAbilityActivationToInputComponent
|
||
- SetBlockAbilityBindingsArray
|
||
- PressInputID
|
||
- ReleaseInputID
|
||
- UAbilityTask_WaitInputPress
|
||
- UAbilityTask_WaitInputRelease
|
||
|
||
理论上是可以将其修改成增强输入的版本，只需要将枚举循环改成InputActionContext循环即可，具体逻辑在角色类中
|
||
```c++
|
||
void AGSHeroCharacter::BindASCInput()
|
||
{
|
||
if (!bASCInputBound && IsValid(AbilitySystemComponent) && IsValid(InputComponent))
|
||
{
|
||
AbilitySystemComponent->BindAbilityActivationToInputComponent(InputComponent, FGameplayAbilityInputBinds(FString("ConfirmTarget"),
|
||
FString("CancelTarget"), FString("EGSAbilityInputID"), static_cast<int32>(EGSAbilityInputID::Confirm), static_cast<int32>(EGSAbilityInputID::Cancel)));
|
||
|
||
bASCInputBound = true;
|
||
}
|
||
}
|
||
|
||
FGameplayAbilityInputBinds(FString InConfirmTargetCommand, FString InCancelTargetCommand, FTopLevelAssetPath InEnumPathName, int32 InConfirmTargetInputID = INDEX_NONE, int32 InCancelTargetInputID = INDEX_NONE)
|
||
: ConfirmTargetCommand(InConfirmTargetCommand)
|
||
, CancelTargetCommand(InCancelTargetCommand)
|
||
, EnumPathName(InEnumPathName)
|
||
, ConfirmTargetInputID(InConfirmTargetInputID)
|
||
, CancelTargetInputID(InCancelTargetInputID)
|
||
{
|
||
}
|
||
```
|
||
|
||
**ConfirmTarget**、**CancelTarget**需要在DefaultInput.ini中添加对应的配置（名字需要对应）。
|
||
**EGSAbilityInputID**为枚举类名称，**EGSAbilityInputID::Confirm**与**EGSAbilityInputID::Cancel**为枚举的index需要与GameplayAbilitySpec中的AbilityInputID对应。具体是在GiveAbility中进行，参考[[#GASShooter中给Ability注册按键ID]]。
|
||
|
||
之后还需要在URPGGameplayAbility中将枚举**ERPGAbilityInputID**修改成
|
||
```c++
|
||
UPROPERTY(BlueprintReadOnly, EditAnywhere, Category = "RPGGameplayAbility|Input")
|
||
ERPGAbilityInputID AbilityInputID = ERPGAbilityInputID::None;
|
||
```
|
||
|
||
## GASShooter中给Ability注册按键ID
|
||
```c++
|
||
void AGSCharacterBase::AddCharacterAbilities()
|
||
{
|
||
// Grant abilities, but only on the server
|
||
if (GetLocalRole() != ROLE_Authority || !IsValid(AbilitySystemComponent) || AbilitySystemComponent->bCharacterAbilitiesGiven)
|
||
{
|
||
return;
|
||
}
|
||
|
||
for (TSubclassOf<UGSGameplayAbility>& StartupAbility : CharacterAbilities)
|
||
{
|
||
AbilitySystemComponent->GiveAbility(
|
||
FGameplayAbilitySpec(StartupAbility, GetAbilityLevel(StartupAbility.GetDefaultObject()->AbilityID), static_cast<int32>(StartupAbility.GetDefaultObject()->AbilityInputID), this));
|
||
}
|
||
|
||
AbilitySystemComponent->bCharacterAbilitiesGiven = true;
|
||
}
|
||
```
|
||
|
||
# SDHGame
|
||
李兄是在状态机每个节点的StateBegin()中调用CreateDynamicSkillInputActionMappingContext()进行动态绑定的。FSDHSkillInputActionBinding里包含FEnhancedActionKeyMapping相关数据。
|
||
```c++
|
||
void USDHSMStateIns::OutputActionKeyMapping(TArray<FEnhancedActionKeyMapping>& OutBindings, const TArray<FSDHSkillInputActionBinding>& InputSkillBinding)
|
||
{
|
||
for (int32 i = 0; i < InputSkillBinding.Num(); i++)
|
||
{
|
||
FEnhancedActionKeyMapping NewMapping;
|
||
NewMapping.Key = InputSkillBinding[i].Key;
|
||
NewMapping.Action = InputSkillBinding[i].Action;
|
||
OutBindings.Add(MoveTemp(NewMapping));
|
||
}
|
||
}
|
||
``` |