C++生成AI以及AI默认Animation，AI播放Montage，AIController控制移动的实现

1.在蓝图中生成一个Character类和一个Controller类，在c++中重新加载，然后在Character的.h中声明组件，变量等

FVector TargetLocation; //设置移动终点

UPROPERTY(VisibleAnyWhere, BlueprintReadonly, Category = Mesh)
class USkeletalMeshComponent *MeshCom; //从蓝图中选择SkeletalMesh

UPROPERTY(VisibleAnyWhere, BlueprintReadonly, Category = Mesh)
class UAnimMontage *YourMontage; //从蓝图中选择Montage

UPROPERTY(EditAnywhere)
TSubclassOf<class UAnimInstance> BlueprintVar;  //从蓝图中选择默认Animation蓝图

2.完善c++类,先添加头文件

#include "Components/CapsuleComponent.h"
#include "Components/SkeletalMeshComponent.h"
#include "GameFramework/CharacterMovementComponent.h"
#include "UObject/ConstructorHelpers.h"
#include "Engine/CollisionProfile.h"
#include "Engine/World.h"
#include "YouAIController.h"//你的AIController
#include "Tasks/AITask_MoveTo.h"
#include "Animation/AnimMontage.h"

3.构造函数，碰撞类型的相关设置在TraceForObjects和碰撞中提到过，接下来直接使用：

//初始化CapsuleComponent的大小
GetCapsuleComponent()->InitCapsuleSize(105.f, 156.0f);
//设置CapsuleComponent的碰撞类型，这个碰撞类型是我自己定义的，也可以用现有的碰撞类型
GetCapsuleComponent()->BodyInstance.SetCollisionProfileName("MyCollisionType");

/*添加SkeletalMesh相关内容*/
//找到蓝图中的SkeletalMesh，路径可以通过“Copy Reference”拷贝
static ConstructorHelpers::FObjectFinder<USkeletalMesh> MeshComAssert(TEXT("/YouPath/YouSkeletalMeshName.YouSkeletalMeshName"));
//给Character添加SkeletalMesh组件
MeshCom = CreateDefaultSubobject<USkeletalMeshComponent>(TEXT("Mesh0"));
//给组件赋值
MeshCom->SetSkeletalMesh(MeshComAssert.Object);
//挂在CapsuleComponent上
MeshCom->SetupAttachment(GetCapsuleComponent());

GetCharacterMovement()->MaxWalkSpeed = 80;//设置最大移动速度

/*添加默认Animation相关内容,我的UE4是4.17版本，这个实现方法对于不同的版本有好多，我的版本用这种方法不会报错*/
//一定要记得路径最后加“_C”
static ConstructorHelpers::FObjectFinder<UAnimBlueprintGeneratedClass> WalkInstance(TEXT("Animation'/YourPath/YouAnimation.YouAnimation_C'"));
//设置默认AnimClass
MeshCom->AnimClass = WalkInstance.Object;

/*添加Montage相关内容*/
//找到蓝图中的Montage，路径可以通过“Copy Reference”拷贝”
static ConstructorHelpers::FObjectFinder<UAnimMontage> YourMontageName(TEXT("/YourPath/MontageName.MontageName"));
YourMontage= YourMontageName.Object;

//设置AIController
AutoPossessAI = EAutoPossessAI::Spawned;
AIControllerClass = AYouAIController::StaticClass();
}

4.相关函数实现

①AI移动，由AIController控制

AYouAIController * Con = Cast<AYouAIController>(GetController());
Con->MoveToLocation(TargetLocation);//TargetLocation在使用之前自行赋值

②AI播放Montage

//播放动画
if (YourMontage!= NULL)
{
UAnimInstance* AnimInstance = MeshCom->GetAnimInstance();
if (AnimInstance != NULL)
{
AnimInstance->Montage_Play(YourMontage, 1.f);//第二个参数为播放时间
}
}