说明

子弹和榴弹击中时, 生成特效

创建VFX组件

武器的下级组件

-
基类	ActorComponent
	STUWeaponFXComponent
	Weapon/Components

添加到头文件搜索路径

ShootThemUp: ShootThemUp.Build.cs

Copy 1PublicIncludePaths.AddRange(new string[]
 2{
 3    "ShootThemUp/Public/Player",
 4    "ShootThemUp/Public/Components",
 5    "ShootThemUp/Public/Dev",
 6    "ShootThemUp/Public/Weapon",
 7    "ShootThemUp/Public/UI",
 8    "ShootThemUp/Public/Animations",
 9    "ShootThemUp/Public/Pickups",
10    "ShootThemUp/Public/Weapon/Components"            
11});

添加依赖模块

ShootThemUp: ShootThemUp.Build.cs

Copy1PublicDependencyModuleNames.AddRange(new string[]
2{ "Core",
3  "CoreUObject",
4  "Engine",
5  "InputCore",
6  "Niagara"
7});

编译项目

实现撞击特效组件

ShootThemUp: Weapon/Components/STUWeaponFXComponent.h

Copy1class UNiagaraSystem;
2
3// public
4void PlayImpactFX(const FHitResult &Hit);
5
6// protected
7UPROPERTY(EditDefaultsOnly, BlueprintReadWrite)
8UNiagaraSystem *Effect;

碰撞信息结构体包含生成特效的所有信息: 位置, 法向量等

ShootThemUp: Weapon/Components/STUWeaponFXComponent.cpp

Copy1#include "NiagaraFunctionLibrary.h"
2
3void USTUWeaponFXComponent::PlayImpactFX(const FHitResult &Hit)
4{
5    UNiagaraFunctionLibrary::SpawnSystemAtLocation(GetWorld(), Effect, Hit.ImpactPoint, Hit.ImpactNormal.Rotation());
6}

UNiagaraFunctionLibrary::SpawnSystemAtLocation

Engine/Plugins

Copy1static UNiagaraComponent* SpawnSystemAtLocation(const UObject* WorldContextObject, class UNiagaraSystem* SystemTemplate, FVector Location, FRotator Rotation = FRotator::ZeroRotator, FVector Scale = FVector(1.f), bool bAutoDestroy = true, bool bAutoActivate = true, ENCPoolMethod PoolingMethod = ENCPoolMethod::None, bool bPreCullCheck = true);

• 在指定位置生成特效
  
• 会检查粒子系统指针和上下文指针
  

-
WorldContentObject	上下文, 传入GetWorld()或this
SystemTemplate	指向Niagara System的指针
SpawnLocation	生成地点
Rotation	朝向
bAutoDestroy	为true时, 粒子系统特效结束即从世界中移除

为步枪添加碰撞特效组件

ShootThemUp: Weapon/STURifleWeapon.h

Copy 1class USTUWeaponFXComponent;
 2
 3// protected
 4UPROPERTY(VisibleAnywhere)
 5USTUWeaponFXComponent *WeaponFXComponent;
 6
 7// public
 8ASTURifleWeapon();
 9
10// protected
11virtual void BeginPlay() override;

ShootThemUp: Weapon/STURifleWeapon.cpp

屏蔽绘制子弹轨迹和击中点

Copy 1#include "Weapon/Components/STUWeaponFXComponent.h"
 2
 3ASTURifleWeapon::ASTURifleWeapon()
 4{
 5    WeaponFXComponent = CreateDefaultSubobject<USTUWeaponFXComponent>("WeaponFXComponent");
 6}
 7
 8void ASTURifleWeapon::BeginPlay()
 9{
10    Super::BeginPlay();
11    check(WeaponFXComponent);
12}
13
14// MakeShot
15if (HitResult.bBlockingHit)
16{
17    // ...
18    WeaponFXComponent->PlayImpactFX(HitResult);
19}

为榴弹添加碰撞特效组件

ShootThemUp: Weapon/STUProjectile.h

Copy1class USTUWeaponFXComponent;
2
3// protected
4UPROPERTY(VisibleAnywhere)
5USTUWeaponFXComponent *WeaponFXComponent;

ShootThemUp: Weapon/STUProjectile.cpp

Copy 1#include "Weapon/Components/STUWeaponFXComponent.h"
 2
 3// ASTUProjectile
 4WeaponFXComponent = CreateDefaultSubobject<USTUWeaponFXComponent>("WeaponFXComponent");
 5
 6// BeginPlay
 7check(WeaponFXComponent);
 8
 9// OnProjectileHit
10WeaponFXComponent->PlayImpactFX(Hit);

查看

设置步枪和榴弹的粒子系统指针类型

• 步枪
  

  

  
  

• 榴弹
  

  

  
  

设置粒子系统

NS_BaseImpact

• 粒子个数
  

  

  
  

• 颜色
  

  

  
  

• 方向: 修改速度方向