虚幻4实现自己移动的AI人物

自己用作记录，如果想学习的直接去看这篇文章吧。

 设置好导航体积覆盖整个关卡，然后创建一个aicontroller类
用到如下几个api。

• GetAllActorsOfClass查找关卡中所有的目标点
• MoveToActor移动到某一个目标点
• OnMoveCompleted移动完成会自动调用

// Fill out your copyright notice in the Description page of Project Settings.


#include "MyAIController.h"
#include "AIController.h"

void AMyAIController::BeginPlay()
{
	Super::BeginPlay();
	UGameplayStatics::GetAllActorsOfClass(GetWorld(), ATargetPoint::StaticClass(), Waypoints);
	GoToRandomWaypoint();
}

ATargetPoint* AMyAIController::GetRandomWaypoint()
{
	int32 index = FMath::RandRange(0, Waypoints.Num() - 1);
	return Cast<ATargetPoint>(Waypoints[index]);
}

void AMyAIController::GoToRandomWaypoint()
{
	MoveToActor(GetRandomWaypoint());
}

void AMyAIController::OnMoveCompleted(FAIRequestID RequestID, const FPathFollowingResult& Result)
{
	Super::OnMoveCompleted(RequestID, Result);

	GoToRandomWaypoint();
}

// Fill out your copyright notice in the Description page of Project Settings.

#pragma once

#include "CoreMinimal.h"
#include "AIController.h"
#include "Engine/TargetPoint.h"
#include "Kismet/GameplayStatics.h"
#include "MyAIController.generated.h"

/**
 * 
 */
UCLASS()
class TAG_API AMyAIController : public AAIController
{
	GENERATED_BODY()

public:
	void BeginPlay() override;

	void OnMoveCompleted(FAIRequestID RequestID, const FPathFollowingResult& Result) override;

private:
	UPROPERTY()
		TArray<AActor*> Waypoints;

	UFUNCTION()
		ATargetPoint* GetRandomWaypoint();

	UFUNCTION()
		void GoToRandomWaypoint();
	
};

8.28更新

#include "MyAIController.h"
#include "AIController.h"

AMyAIController::AMyAIController()
{
	PrimaryActorTick.bCanEverTick = true;
}

void AMyAIController::BeginPlay()
{
	Super::BeginPlay();
}

FVector AMyAIController::GetRandomWaypoint()
{
//这里两种写法，采用的一种是为了再多人游戏中也能进行拓展
	FVector myPlayer1 = UGameplayStatics::GetPlayerController(GetWorld(), 0)->GetPawn()->GetActorLocation();
	//FVector myPlayer = GetWorld()->GetFirstPlayerController()->GetPawn()->GetActorLocation();
	return myPlayer1;
}

void AMyAIController::GoToRandomWaypoint()
{
	FVector PlayerLocation = GetRandomWaypoint();
	FVector EnemyLocation = GetCharacter()->GetActorLocation();
	//计算ai需要面朝的方向
	FVector EnemyDirect = PlayerLocation - EnemyLocation;

	//因为发现人物不会自己转向了，就加了这一句。
	this->GetCharacter()->FaceRotation(EnemyDirect.Rotation(), 0.2);
	MoveToLocation(PlayerLocation, 5);
}
void AMyAIController::Tick(float DeltaTime)
{
	GoToRandomWaypoint();
}

修改了一下代码实现了一直跟随玩家。再tick中调用是为了即时更新GoToRandomWaypoint使用的玩家位置