如何从另一个类启动角色 我创建了一个启动程序的C++类，它是一个立方体静态网格组件和一个Ubox组件的编译。现在，一旦角色与点击框重叠，它就会触发ALaunchPad:：OnBoxBeginOverlap中的任何内容。我现在试图告诉大家，当角色与UBox重叠时，在空中发射它们，类似于蓝图的“LaunchCharacter”节点

LaunchPad.cpp

void ALaunchPad::OnBoxBeginOverlap(UPrimitiveComponent*  OverlappedComp, AActor* OtherActor, UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, const FHitResult& SweepResult) 
{
    GEngine->AddOnScreenDebugMessage(-1, 15.0f, FColor::Yellow, TEXT("Character Launched!"));
    Asgd240_1115350_core5Character::LaunchCharacter(FVector(0, 0, velocity), false, true);

}

发射台

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

#pragma once

#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "LaunchPad.generated.h"


UCLASS()
class SGD240_1115350_CORE5_API ALaunchPad : public AActor
{
    GENERATED_BODY()

public: 
    // Sets default values for this actor's properties
    ALaunchPad();

protected:
    // Called when the game starts or when spawned
    virtual void BeginPlay() override;

public: 
    // Called every frame
    virtual void Tick(float DeltaTime) override;

    void OnBoxBeginOverlap(UPrimitiveComponent * HitComp, AActor * OtherActor, UPrimitiveComponent * OtherComp, FVector NormalImpulse, const FHitResult & Hit);

    UPROPERTY(VisibleAnywhere)
    class UBoxComponent* Collide;

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

    UPROPERTY(EditAnywhere)
        float velocity;

    UFUNCTION()
        void LaunchCharacter();

};

---

目前，我收到一个“非静态成员引用必须是相对于特定对象的，并且它不会编译”。有什么想法吗？

将

其他参与者

投射到

字符

上，然后调用其

启动字符

方法：

void ALaunchPad::OnBoxBeginOverlap(UPrimitiveComponent*  OverlappedComp, AActor* OtherActor, 
        UPrimitiveComponent* OtherComp, int32 OtherBodyIndex, bool bFromSweep, 
        const FHitResult& SweepResult) 
{
    GEngine->AddOnScreenDebugMessage(-1, 15.0f, FColor::Yellow, TEXT("Character Launched!"));

    ACharacter* OtherCharacter = Cast<ACharacter>(OtherActor);
    if (OtherCharacter != nullptr)
    {
        OtherCharacter->LaunchCharacter(FVector(0, 0, velocity), false, true);
    }

}

void ALaunchPad:：OnBoxBeginOverlap（UPrimitiveComponent*OverlappedComp，AActor*OtherActor，
UPrimitiveComponent*OtherComp，int32 OtherBodyIndex，bool bFromSweep，
常量FHitResult和扫描结果）
{
GEngine->AddOnScreenDebugMessage（-1,15.0f，FColor:：Yellow，文本（“角色启动！”）；
ACharacter*OtherCharacter=Cast（OtherActor）；
if（OtherCharacter！=nullptr）
{
OtherCharacter->LaunchCharacter（FVector（0，0，速度），false，true）；
}
}