利用第三方后期处理材质（PostProcess Material）对物体进行描边【UE4】【C++】

效果图：

第一步，创建C++ Basic Code

第二步，定义键盘和鼠标输入的映射

第三步，修改 Rendering 中的 Custom Depth - Stencil Pass

第四步，找到GlobalPostProcessVolume [如果没有的话自行拖放一个PostProcessVolume组件]

将 unbound 勾选上

再修改 Blendables 为 PPI_OutlineColored

完整代码如下：

MyPlayer.h

// Fill out your copyright notice in the Description page of Project Settings.#pragma once#include "GameFramework/Character.h"
#include "MyPlayer.generated.h"UCLASS()
class OUTLINECPLUSPLUS_API AMyPlayer : public ACharacter
{GENERATED_BODY()public:// Sets default values for this character's propertiesAMyPlayer();void MoveForward(float val);void MoveRight(float val);void LookYaw(float val);void LookPitch(float val);void Use();class AInteractableActor* FindFocusedActor();void HandleHighlight();// Called when the game starts or when spawnedvirtual void BeginPlay() override;// Called every framevirtual void Tick( float DeltaSeconds ) override;// Called to bind functionality to inputvirtual void SetupPlayerInputComponent(class UInputComponent* PlayerInputComponent) override;private:UPROPERTY(EditDefaultsOnly)float InteractionDistance = 300.f; // 交互的范围class AInteractableActor* FocusedActor;// 用于 LineTraceSingleByChannelFCollisionQueryParams TraceParams;
};

MyPlayer.cpp

// Fill out your copyright notice in the Description page of Project Settings.
#include "InteractableActor.h"
#include "MyPlayer.h"// Sets default values
AMyPlayer::AMyPlayer()
{// Set this character to call Tick() every frame.  You can turn this off to improve performance if you don't need it.PrimaryActorTick.bCanEverTick = true;TraceParams = FCollisionQueryParams(FName(TEXT("TraceParams")), false, this);TraceParams.bTraceComplex = false;TraceParams.bTraceAsyncScene = false;TraceParams.bReturnPhysicalMaterial = false;
}// Called when the game starts or when spawned
void AMyPlayer::BeginPlay()
{Super::BeginPlay();}// Called every frame
void AMyPlayer::Tick( float DeltaTime )
{Super::Tick( DeltaTime );if (Controller && Controller->IsLocalController()){HandleHighlight();}}// Called to bind functionality to input
void AMyPlayer::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
{Super::SetupPlayerInputComponent(PlayerInputComponent);InputComponent->BindAxis("MoveForward", this, &AMyPlayer::MoveForward);InputComponent->BindAxis("MoveRight", this, &AMyPlayer::MoveRight);InputComponent->BindAxis("LookYaw", this, &AMyPlayer::LookYaw);InputComponent->BindAxis("LookPitch", this, &AMyPlayer::LookPitch);InputComponent->BindAction("Use", IE_Pressed, this, &AMyPlayer::Use);}
// 前后移动
void AMyPlayer::MoveForward(float val)
{FRotator Rotation(0, GetActorRotation().Yaw, 0);   // Roll, Yaw, PitchFVector forward = FRotationMatrix(Rotation).GetScaledAxis(EAxis::X);AddMovementInput(forward, val);
}// 左右移动
void AMyPlayer::MoveRight(float val)
{FRotator Rotation(0, GetActorRotation().Yaw, 0);   // Roll, Yaw, PitchFVector right = FRotationMatrix(Rotation).GetScaledAxis(EAxis::Y);AddMovementInput(right, val);
}// 左右转向
void AMyPlayer::LookYaw(float val)
{AddControllerYawInput(val);
}// 上下转向
void AMyPlayer::LookPitch(float val)
{// 注意方向相反AddControllerPitchInput(val);
}// 按 E 键与激活对象进行交互
void AMyPlayer::Use()
{AInteractableActor* Interactable = FindFocusedActor();if (Interactable){// OnInteract_ImplementationInteractable->OnInteract(this);}
}AInteractableActor* AMyPlayer::FindFocusedActor()
{if (!Controller){return nullptr;}FVector Location;FRotator Rotation;FHitResult Hit(ForceInit);Controller->GetPlayerViewPoint(Location, Rotation);FVector Start = Location;FVector End = Start + (Rotation.Vector() * InteractionDistance);// 通过 “射线拾取” 选定对象GetWorld()->LineTraceSingleByChannel(Hit, Start, End, ECC_Camera, TraceParams);if (Hit.bBlockingHit)   // 击中{// 获取当前被击中的对象的引用AInteractableActor* MyCastActor = Cast<AInteractableActor>(Hit.GetActor());if (MyCastActor){return MyCastActor;}}return nullptr;
}void AMyPlayer::HandleHighlight()
{AInteractableActor* NewHighlight = FindFocusedActor();if (NewHighlight){// 如果当前描边和新激活的对象不是同一个if (FocusedActor != NewHighlight){if (FocusedActor){// 当前描边对象取消描边FocusedActor->OnEndFocus();}// 描边新激活对象NewHighlight->OnBeginFocus();FocusedActor = NewHighlight;}}else{if (FocusedActor){// 取消描边FocusedActor->OnEndFocus();FocusedActor = nullptr;}}
}

InteractableActor.h

// Fill out your copyright notice in the Description page of Project Settings.#pragma once#include "GameFramework/Actor.h"
#include "OutlineCPlusPlus.h"
#include "InteractableActor.generated.h"UCLASS()
class OUTLINECPLUSPLUS_API AInteractableActor : public AActor
{GENERATED_BODY()public:    // Sets default values for this actor's propertiesAInteractableActor();// Called when the game starts or when spawnedvirtual void BeginPlay() override;// Called every framevirtual void Tick( float DeltaSeconds ) override;UFUNCTION(BlueprintNativeEvent, BlueprintCallable, Category = Interaction)void OnInteract(AActor* Caller) ;virtual void OnInteract_Implementation(AActor* Caller);void OnBeginFocus();void OnEndFocus();private:UPROPERTY(EditDefaultsOnly)uint32 bCanInteract : 1;TArray<UMeshComponent*> Meshes;UPROPERTY(EditDefaultsOnly)EStencilColor Color = EStencilColor::SC_Green;};

InteractableActor.cpp

// Fill out your copyright notice in the Description page of Project Settings.#include "MyPlayer.h"
#include "InteractableActor.h"// Sets default values
AInteractableActor::AInteractableActor()
{// Set this actor to call Tick() every frame.  You can turn this off to improve performance if you don't need it.PrimaryActorTick.bCanEverTick = true;}// Called when the game starts or when spawned
void AInteractableActor::BeginPlay()
{Super::BeginPlay();for (UActorComponent* Mesh : GetComponentsByClass(UMeshComponent::StaticClass())){UMeshComponent* thisMesh = Cast<UMeshComponent>(Mesh);if (thisMesh){Meshes.Push(thisMesh);}}}// Called every frame
void AInteractableActor::Tick( float DeltaTime )
{Super::Tick( DeltaTime );}void AInteractableActor::OnInteract_Implementation(AActor* Caller)
{AMyPlayer* Player = Cast<AMyPlayer>(Caller);if (Player){GEngine->AddOnScreenDebugMessage(-1,   5.f,   FColor::Red,   FString::Printf(TEXT("Now deleting the interactable actor!  "))); // 销毁自己Destroy();}}void AInteractableActor::OnBeginFocus()
{if (bCanInteract){for (UMeshComponent* Mesh : Meshes){Mesh->SetRenderCustomDepth(true);Mesh->SetCustomDepthStencilValue((uint8)Color);}}
}void AInteractableActor::OnEndFocus()
{if (bCanInteract){for (UMeshComponent* Mesh : Meshes){Mesh->SetRenderCustomDepth(false);}}
}

颜色的 Enum

UENUM(BlueprintType)
enum class EStencilColor : uint8
{SC_Green = 250  UMETA(DisplayName = "Green"),SC_Blue = 251  UMETA(DisplayName = "Blue"),SC_Red = 252  UMETA(DisplayName = "Red"),SC_White = 253  UMETA(DisplayName = "White")
};

第三方材质下载链接

PostProcess 官方文档

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利用第三方后期处理材质（PostProcess Material）对物体进行描边【UE4】【C++】

MyPlayer.h

MyPlayer.cpp

InteractableActor.h

InteractableActor.cpp

颜色的 Enum

利用第三方后期处理材质（PostProcess Material）对物体进行描边【UE4】【C++】相关推荐

最新文章

热门文章

利用第三方后期处理材质（PostProcess Material）对物体进行描边【UE4】【C++】

MyPlayer.h

MyPlayer.cpp

InteractableActor.h

InteractableActor.cpp

颜色 的 Enum

利用第三方后期处理材质（PostProcess Material）对物体进行描边【UE4】【C++】相关推荐

最新文章

热门文章

颜色的 Enum