AI Sense Damage

说明

当前, NPC只能感知处于视角180度范围内的敌人

添加伤害感知: 即对NPC造成伤害, 其能锁定伤害来源(身体转向伤害源)

为AIController添加伤害感知

BP_STUAIController

1. 设置调试信息颜色
   
2. 设置调试信息生存期
   
   Max Age
   

API导航

UAISense_Damage::ReportDamageEvent

上报伤害事件

Copy1/** EventLocation will be reported as Instigator's location at the moment of event happening*/
2UFUNCTION(BlueprintCallable, Category = "AI|Perception", meta = (WorldContext="WorldContextObject", AdvancedDisplay="HitLocation"))
3static void ReportDamageEvent(UObject* WorldContextObject, AActor* DamagedActor, AActor* Instigator, float DamageAmount, FVector EventLocation, FVector HitLocation, FName Tag = NAME_None);

感知伤害源

1. 获取感知对象
   
   如果视角没有敌人, 则在伤害源中寻找最近敌人
   

   ShootThemUp: Components/STUAIPerceptionComponent.cpp
   

   Copy 1// GetClosetEnemy
    2
    3if (!PercieveActors.Num())
    4{
    5    return GetDamageEnemy();GetCurrentlyPerceivedActors(UAISense_Damage::StaticClass(), PercieveActors);
    6    if (!PercieveActors.Num()) return nullptr;
    7
    8    UE_LOG(LogTemp, Display, TEXT("Actor name: %s"), *PercieveActors[0]->GetName());
    9}
   10
   11// ...
   12
   13if (BestPawn)
   14{
   15    UE_LOG(LogTemp, Display, TEXT("Actor name: %s"), *BestPawn->GetName());
   16}

   当前只有敌人可以造成伤害
   

2. 受到伤害时上报伤害事件
   
   private

ShootThemUp: Components/STUHealthComponent.h
   

   Copy1void ReportDamageEvent(float Damage, AController *InstigatedBy);

   ShootThemUp: Components/STUHealthComponent.cpp
   

   Copy1// ApplyDamage
   2ReportDamageEvent(Damage, InstigatedBy);

   ShootThemUp: Components/STUHealthComponent.cpp
   

   Copy 1#include "Perception/AISense_Damage.h"
    2
    3void USTUHealthComponent::ReportDamageEvent(float Damage, AController *InstigatedBy)
    4{
    5    if (!InstigatedBy ||            //
    6        !InstigatedBy->GetPawn() || //
    7        !GetOwner())
    8        return;
    9
   10    UAISense_Damage::ReportDamageEvent(GetWorld(), GetOwner(), InstigatedBy->GetPawn(), Damage, InstigatedBy->GetPawn()->GetActorLocation(),
   11                                       GetOwner()->GetActorLocation());
   12}

查看

1. 设置NPC行为树
   
   为Selector添加Find Enemy服务
   

   

   
   

2. 调试信息: 可见粉色调试球, 以及伤害源名称
   
   按下 ' 打开调试界面, 按下小写键盘上的 4 显示感知信息
   

   

   
   

附: NPC感知声音

1. 为AIController添加声音感知
   
   BP_STUAIController
   

   

   
   

2. 上报声音事件
   

   • 头文件
     

     Copy1#include "Perception/AISense_Hearing.h"

   • 接口
     

     Copy 1/**
      2​ * Report a noise event.
      3​ * 
      4​ * @param NoiseLocation Location of the noise.
      5​ * @param Loudness Loudness of the noise. If MaxRange is non-zero, modifies MaxRange, otherwise modifies the squared distance of the sensor's range.
      6​ * @param Instigator Actor that triggered the noise.
      7​ * @param MaxRange Max range at which the sound can be heard, multiplied by Loudness. Values <= 0 mean no limit (still limited by listener's range however).
      8​ * @param Tag Identifier for the event.
      9 */
     10UFUNCTION(BlueprintCallable, Category = "AI|Perception", meta = (WorldContext="WorldContextObject"))
     11static void ReportNoiseEvent(UObject* WorldContextObject, FVector NoiseLocation, float Loudness = 1.f, AActor* Instigator = nullptr, float MaxRange = 0.f, FName Tag = NAME_None);