一.相關藍圖的練習，在我之前的文章中射擊子彈案例-CSDN博客

本篇使用C++實現

1.創建C++類 MyBullet,在MyBullet.h中包含相關頭文件

#include "CoreMinimal.h"
#include "GameFramework/Actor.h"
#include "Components/StaticMeshComponent.h"  //模型組件
//#include "Components/CapsuleComponent.h"  //球形碰撞組件的頭文件
#include "GameFramework/ProjectileMovementComponent.h"   //射擊組件
#include <Components/SphereComponent.h> //球形碰撞組件的頭文件
#include "MyBullet.generated.h" 

2.聲明屬性變量，子彈模型，子彈碰撞體，子彈發射器

public:UPROPERTY(VisibleAnywhere,BlueprintReadOnly,Category = "MyComponent")UStaticMeshComponent* BulletMesh;   //static 組件UPROPERTY(VisibleAnywhere,BlueprintReadOnly,Category = "MyComponent")USphereComponent* MySphere;    //碰撞組件UPROPERTY(VisibleAnywhere,BlueprintReadOnly,Category = "MyComponent")UProjectileMovementComponent* FireGunProjectile; //

3.將組件實例化

BulletMesh = CreateDefaultSubobject<UStaticMeshComponent>(TEXT("BulletComponent")); //實例化StaticMesh組件
//RootComponent = 
FireGunProjectile = CreateDefaultSubobject<UProjectileMovementComponent>(TEXT("FireGunProjectileComponent")); //實例化ProjectileMovement組件
MySphere = CreateDefaultSubobject<USphereComponent>(TEXT("SphereCollision")); // 

4.通過尋找靜態模型，設置靜態模型的實例。設置根組件，設置父子級，只要Projectile在根組件后面就能，讓物體跟隨，就有發射根組件的效果。

再設置參數，調整效果。發射的初始速度，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'")); //靜態加載資源 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; //旋轉跟隨重力
FireGunProjectile->bIsHomingProjectile = true;    //跟隨組件
FireGunProjectile->ProjectileGravityScale = 0.02; //設置重力

5.生成藍圖類放到場景中，這樣就能實現單發的子彈效果