内容发布更新时间 : 2026/9/20 14:39:29星期一 下面是文章的全部内容请认真阅读。
创建和NPC的对话窗体
我们需要创建一个继承自HUD的类
UCLASS()
class CPLUSLEARN_API AMyHUDMessage : public AHUD {
public : };
void AMyHUDMessage::DrawHUD() {
DrawText(\欢迎来到虚幻的世界！！\, FVector2D(0, 0), hudFont, FVector2D(1, 1), DrawLine(200, 300, 400, 500, FLinearColor::Blue); Super::DrawHUD();
virtual void DrawHUD() override;
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = HUDFont) UFont *hudFont; GENERATED_BODY()
FColor::White); }
我们在自己的HUD的类中定义了一个字体，并且在界面上绘出一个线框和文字
重新编译项目，我们进入UE4中，创建一个继承自MyHUD的蓝图类，同时设置我们自己的字体信息。最后在我们的游戏模式中将默认的HUD改成我们自己创建的HUD
下面我们要用一个一个列表来存放这些对话的信息，我们打开自己创建的C++的HUD类
void AMyHUDMessage::DrawHUD() {
//DrawLine(200, 300, 400, 500, FLinearColor::Blue); Super::DrawHUD();
}
void AMyHUDMessage::addMessage(Message msg) { }
messages.Add(msg); }
//当该条消息的时间小于0的时候将该条信息移除 if (messages[c].time < 0) { }
messages.RemoveAt(c);
//时间逐步缩减
messages[c].time -=GetWorld()->GetDeltaSeconds();
//使用字体绘制出我们的信息(信息，颜色，宽度+边距，高度+边距，字体)
DrawText(messages[c].message, messages[c].color, x + pad, y + pad, hudFont);
//绘制出背景
DrawRect(FLinearColor::Black, x, y, Canvas->SizeX, messageH);
float messageH = outputHeight + 2.f*pad;//信息的高度就是输出高度+2倍的间隔 float x = 0.f, y = c*messageH;
for (int c = messages.Num() - 1; c >= 0; c--) {
float outputWidth, outputHeight, pad = 10.f; //定义输出的宽度高度和间隔
//获取出信息内容大小
GetTextSize(messages[c].message, outputWidth, outputHeight, hudFont, 1.f); //DrawText(\
下面我们必须要完成我们的NPC实体
UCLASS()
class CPLUSLEARN_API ANonePlayerEntity : public ACharacter
{ public: };
//NPC所需要传递的话
UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = NPCMessage)
FString NPCMessage; //碰撞器触发器
UPROPERTY(VisibleAnywhere, BlueprintReadOnly, Category = Collision)
TSubobjectPtr
UFUNCTION(BlueprintNativeEvent, Category = \)
void Prox(AActor* otherActor, UPrimitiveComponent* OtherComp, int32 // Called to bind functionality to input
virtual void SetupPlayerInputComponent(class UInputComponent* InputComponent) // Called when the game starts or when spawned virtual void BeginPlay() override;
// Called every frame
virtual void Tick( float DeltaSeconds ) override; // Sets default values for this character's properties ANonePlayerEntity(); GENERATED_UCLASS_BODY()
override;
OtherBodyIndex, bool bFromSweep, const FHitResult & SweepResult);
这个是我们自己的NPC类的头文件，我们新添加了碰撞检测事件，里面的参数都是固定的API的参数，指定是Collision类别的碰撞器才会触发这个碰撞事件
ANonePlayerEntity::ANonePlayerEntity(const class FPostConstructInitializeProperties &PCIP) :Super(PCIP) {
// Set this character to call Tick() every frame. You can turn this off to improve PrimaryActorTick.bCanEverTick = true; performance if you don't need it.
}
// Called when the game starts or when spawned void ANonePlayerEntity::BeginPlay() { }
// Called every frame
void ANonePlayerEntity::Tick( float DeltaTime ) { }
// Called to bind functionality to input
void ANonePlayerEntity::SetupPlayerInputComponent(class UInputComponent* InputComponent) { }
void ANonePlayerEntity::Prox_Implementation(AActor * otherActor, UPrimitiveComponent* othrComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult & SweepResult) {
//将其他玩家进入该区域转化为avatar，如果是空物体的，那么直接返回 if (Cast
return;
//碰撞发生事情，当有交互时
Super::SetupPlayerInputComponent(InputComponent); Super::Tick( DeltaTime ); Super::BeginPlay();
ProxSphere = PCIP.CreateDefaultSubobject
ProxSphere->AttachTo(RootComponent); //设置碰撞半径
ProxSphere->SetSphereRadius(32.f); //当有人进去碰撞区域
ProxSphere->OnComponentBeginOverlap.AddDynamic(this, &ANonePlayerEntity::Prox); NPCMessage = \， i am Owner\;//设置默认的NOC对话 Sphere\));