UE4 C++ (9)：触发器触发器绑定委托参考资料

80 阅读 0 评论 53 点赞

我是靠谱客的博主淡然机器猫，最近开发中收集的这篇文章主要介绍UE4 C++ (9)：触发器触发器绑定委托参考资料，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

10/15/2020

文章目录

触发器
- 触发器事件
- OverlapBegin/End委托
绑定委托
参考资料

触发器

触发器可以用于触发事件，以供更新指定的Actor或者Components

触发器事件

触发器事件
在C++中，UPrimitiveComponent声明的动态多播委托

/**
 * Delegate for notification of blocking collision against a specific component.  
 * NormalImpulse will be filled in for physics-simulating bodies, but will be zero for swept-component blocking collisions. 
 */
DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_FiveParams( FComponentHitSignature, UPrimitiveComponent, OnComponentHit, UPrimitiveComponent*, HitComponent, AActor*, OtherActor, UPrimitiveComponent*, OtherComp, FVector, NormalImpulse, const FHitResult&, Hit );
/** Delegate for notification of start of overlap with a specific component */
DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_SixParams( FComponentBeginOverlapSignature, UPrimitiveComponent, OnComponentBeginOverlap, UPrimitiveComponent*, OverlappedComponent, AActor*, OtherActor, UPrimitiveComponent*, OtherComp, int32, OtherBodyIndex, bool, bFromSweep, const FHitResult &, SweepResult);
/** Delegate for notification of end of overlap with a specific component */
DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_FourParams( FComponentEndOverlapSignature, UPrimitiveComponent, OnComponentEndOverlap, UPrimitiveComponent*, OverlappedComponent, AActor*, OtherActor, UPrimitiveComponent*, OtherComp, int32, OtherBodyIndex);
/** Delegate for notification when a wake event is fired by physics*/
DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_TwoParams(FComponentWakeSignature, UPrimitiveComponent, OnComponentWake, UPrimitiveComponent*, WakingComponent, FName, BoneName);
/** Delegate for notification when a sleep event is fired by physics*/
DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_TwoParams(FComponentSleepSignature, UPrimitiveComponent, OnComponentSleep, UPrimitiveComponent*, SleepingComponent, FName, BoneName);
/** Delegate for notification when collision settings change. */
DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_OneParam(FComponentCollisionSettingsChangedSignature, UPrimitiveComponent, OnComponentCollisionSettingsChangedEvent, UPrimitiveComponent*, ChangedComponent);

DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_OneParam( FComponentBeginCursorOverSignature, UPrimitiveComponent, OnBeginCursorOver, UPrimitiveComponent*, TouchedComponent );
DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_OneParam( FComponentEndCursorOverSignature, UPrimitiveComponent, OnEndCursorOver, UPrimitiveComponent*, TouchedComponent );
DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_TwoParams( FComponentOnClickedSignature, UPrimitiveComponent, OnClicked, UPrimitiveComponent*, TouchedComponent , FKey, ButtonPressed);
DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_TwoParams( FComponentOnReleasedSignature, UPrimitiveComponent, OnReleased, UPrimitiveComponent*, TouchedComponent, FKey, ButtonReleased);
DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_TwoParams( FComponentOnInputTouchBeginSignature, UPrimitiveComponent, OnInputTouchBegin, ETouchIndex::Type, FingerIndex, UPrimitiveComponent*, TouchedComponent );
DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_TwoParams( FComponentOnInputTouchEndSignature, UPrimitiveComponent, OnInputTouchEnd, ETouchIndex::Type, FingerIndex, UPrimitiveComponent*, TouchedComponent );
DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_TwoParams( FComponentBeginTouchOverSignature, UPrimitiveComponent, OnInputTouchEnter, ETouchIndex::Type, FingerIndex, UPrimitiveComponent*, TouchedComponent );
DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_TwoParams( FComponentEndTouchOverSignature, UPrimitiveComponent, OnInputTouchLeave, ETouchIndex::Type, FingerIndex, UPrimitiveComponent*, TouchedComponent );

委托事件与回调函数差不多，委托别人调用自己类中的函数，委托函数需要提前指明函数的参数类型。

OverlapBegin/End委托

DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_SixParams( FComponentBeginOverlapSignature, UPrimitiveComponent, OnComponentBeginOverlap, UPrimitiveComponent*, OverlappedComponent, AActor*, OtherActor, UPrimitiveComponent*, OtherComp, int32, OtherBodyIndex, bool, bFromSweep, const FHitResult &, SweepResult);

DECLARE_DYNAMIC_MULTICAST_SPARSE_DELEGATE_FourParams( FComponentEndOverlapSignature, UPrimitiveComponent, OnComponentEndOverlap, UPrimitiveComponent*, OverlappedComponent, AActor*, OtherActor, UPrimitiveComponent*, OtherComp, int32, OtherBodyIndex);

声明的数据类型和函数调用的数据类型需要相匹配

UFUNCTION()
void OnOverlapBegin(class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult);

/** 当某对象离开球体组件时调用 */
UFUNCTION()
void OnOverlapEnd(class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex);

绑定委托

//USphereComponent Sphere1; 继承UPrimitiveComponent

Sphere1->OnComponentBeginOverlap.AddDynamic(this, &ALightSwitchCodeOnly::OnOverlapBegin);       // 当此组件与某对象重叠时，设置
通知
Sphere1->OnComponentEndOverlap.AddDynamic(this, &ALightSwitchCodeOnly::OnOverlapEnd);       // 当此组件与某对象重叠时，设置通知

void ALightSwitchCodeOnly::OnOverlapBegin(class AActor* OtherActor, class UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult)
{
    if (OtherActor && (OtherActor != this) && OtherComp)
    {
        ToggleLight();
    }
}