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一.相关蓝图的练习，在我之前的文章中射击子弹案例-CSDN博客
本篇使用C++实现
1.创建C++类 MyBullet,在MyBullet.h中包含相关头文件
#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "Components/StaticMeshComponent.h" //模型组件
//#include "Components/CapsuleComponent.h" //球形碰撞组件的头文件
#include "GameFramework/ProjectileMovementComponent.h" //射击组件
#include <Components/SphereComponent.h> //球形碰撞组件的头文件
#include "MyBullet.generated.h"
2.声明属性变量，子弹模型，子弹碰撞体，子弹发射器
public:UPROPERTY(VisibleAnywhere,BlueprintReadOnly,Category = "MyComponent")UStaticMeshComponent* BulletMesh; //static 组件UPROPERTY(VisibleAnywhere,BlueprintReadOnly,Category = "MyComponent")USphereComponent* MySphere; //碰撞组件UPROPERTY(VisibleAnywhere,BlueprintReadOnly,Category = "MyComponent")UProjectileMovementComponent* FireGunProjectile; //3.将组件实例化
BulletMesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("BulletComponent")); //实例化StaticMesh组件
//RootComponent =
FireGunProjectile = CreateDefaultSubobject<UProjectileMovementComponent>(TEXT("FireGunProjectileComponent")); //实例化ProjectileMovement组件
MySphere = CreateDefaultSubobject<USphereComponent>(TEXT("SphereCollision")); // 4.通过寻找静态模型，设置静态模型的实例。设置根组件，设置父子级，只要Projectile在根组件后面就能，让物体跟随，就有发射根组件的效果。
再设置参数，调整效果。发射的初始速度，最大速度，重力等。
MySphere = CreateDefaultSubobject<USphereComponent>(TEXT("SphereCollision")); //
static ConstructorHelpers::FObjectFinder<UStaticMesh>TmpStaticMesh(TEXT("/Script/Engine.StaticMesh'/Engine/BasicShapes/Sphere.Sphere'")); //静态加载资源 重要
BulletMesh->SetStaticMesh(TmpStaticMesh.Object); //.Object重要RootComponent = BulletMesh;//FireGunProjectile->setupattack
MySphere->SetupAttachment(RootComponent);
MySphere->InitSphereRadius(67);
FireGunProjectile->SetUpdatedComponent(RootComponent);//
FireGunProjectile->InitialSpeed = 1200.0f;//初始速度
FireGunProjectile->MaxSpeed = 24000.0f; //最大速度
FireGunProjectile->bRotationFollowsVelocity = false; //旋转跟随重力
FireGunProjectile->bIsHomingProjectile = true; //跟随组件
FireGunProjectile->ProjectileGravityScale = 0.02; //设置重力5.生成蓝图类放到场景中，这样就能实现单发的子弹效果
