Dissolve

Dissolv는 머터리얼로 구현을 하며. 점점 사라지는 이벤트를 구현할 때 종종 쓴다.

투명화라던지, 몬스터가 쓰러지고 사라지는 효과라던지. 사용처는 무궁무진하다.

구현방법. - 아래 방법은 몬스터 사라지는 이벤트로 구현.

1. Dissolve Material 구현.

2. 몬스터의 최상위 부모 머터리얼을 탐색 및 설정.

Tip : 해당 이벤트에서는 몬스터가 사라지는 부분은 투명하게 하기 떄문에 블랜드 모드를 Masked로 설정한다. 해당 모드를 어떻게 설정하느냐에 따라 이벤트가 바뀌니 취향에 맞게 설정.

3. Monster 코드 수정. - 아래 코드에선 Dissolv 관련된 코드만 있으며. 움직임 등등은 제외함.

[Monster.h]

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

#pragma once

#include "../GameInfo.h"
#include "GameFramework/Character.h"
#include "Monster.generated.h"

struct FConvertMaterial
{
	int32	Index;
	UMaterialInstanceDynamic* Mtrl;

	FConvertMaterial() :
		Index(-1),
		Mtrl(nullptr)
	{
	}
};

UCLASS()
class UE11_API AMonster : public ACharacter
{
	GENERATED_BODY()

public:
	// Sets default values for this character's properties
	AMonster();

protected:

	class UMonsterAnimInstance* mAnimInst;

	AActor* mHitActor;

	TArray<UMaterialInstanceDynamic*> mDissolvMtrlArray;
	TArray<FConvertMaterial>	mDissolveMtrlIndexArray;

	bool				mDissolveEnable;
	float				mDissolve;
	float				mDissolveRange;
	float				mDissolveTime;


	UPROPERTY(EditAnywhere, BlueprintReadWrite, meta = (AllowPrivateAccess = true))
	float				mDissolveTimeMax;

	UPROPERTY(EditAnywhere, BlueprintReadWrite, meta = (AllowPrivateAccess = true))
	float				mDissolveMin;
	UPROPERTY(EditAnywhere, BlueprintReadWrite, meta = (AllowPrivateAccess = true))
	float				mDissolveMax;

public:

	void OnDissolve();

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

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

	virtual float TakeDamage(float DamageAmount, struct FDamageEvent const& DamageEvent, class AController* EventInstigator, AActor* DamageCauser);

[Monster.cpp]

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


#include "Monster.h"
#include "MonsterAnimInstance.h"
#include "MonsterSpawnPoint.h"
#include "../UE11GameInstance.h"
#include "MonsterAIController.h"

// Sets default values
AMonster::AMonster()
{
	// 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;



	mDissolveEnable = false;
	mDissolveMax = 1.5f;
	mDissolveMin = -1.f;
	mDissolveTimeMax = 3.f;
	mDissolveTime = 0.f;

	mDissolve = 0.f;
	mDissolveRange = mDissolveMax - mDissolveMin;

}

void AMonster::OnDissolve()
{
	if (mDissolvMtrlArray.IsEmpty())
		return;

	mDissolveEnable = true;

	int32 Count = mDissolvMtrlArray.Num();

	for (int32 i = 0; i < Count; ++i)
	{
		mDissolvMtrlArray[i]->SetScalarParameterValue(TEXT("DissolveEnable"), 1.f);
	}
}

// Called when the game starts or when spawned
void AMonster::BeginPlay()
{
	Super::BeginPlay();

	
	

		int32 IndexCount = mDissolveMtrlIndexArray.Num();
		
		for (int32 i = 0; i < IndexCount; ++i)
		{
			UMaterialInstanceDynamic* Mtrl =
				GetMesh()->CreateDynamicMaterialInstance(mDissolveMtrlIndexArray[i].Index,
					mDissolveMtrlIndexArray[i].Mtrl);

			mDissolvMtrlArray.Add(Mtrl);
		}
	}

	mAnimInst = Cast<UMonsterAnimInstance>(GetMesh()->GetAnimInstance());
}

// Called every frame
void AMonster::Tick(float DeltaTime)
{
	Super::Tick(DeltaTime);

	if (mDissolveEnable)
	{
		mDissolveTime += DeltaTime;

		float Ratio = mDissolveTime / mDissolveTimeMax;

		mDissolve = mDissolveMax - Ratio * mDissolveRange;

		int32 Count = mDissolvMtrlArray.Num();

		for (int32 i = 0; i < Count; ++i)
		{
			mDissolvMtrlArray[i]->SetScalarParameterValue(TEXT("Dissolve"), mDissolve);
		}

		if (mDissolveTime >= mDissolveTimeMax)
		{
			mSpawnPoint->RemoveMonster(this);
			Destroy();
		}
	}
}

[MonsterAnimationInstance.cpp]

void UMonsterAnimInstance::AnimNotify_DeathEnd()
{
	AMonster* Monster = Cast<AMonster>(TryGetPawnOwner());

	if (IsValid(Monster))
		Monster->OnDissolve();
}

[MonsterWarrior.cpp]

AMinionWarrior::AMinionWarrior()
{
	FConvertMaterial	Mtrl;
	Mtrl.Index = 0;

	mDissolveMtrlIndexArray.Add(Mtrl);
}