103 - Dissolving with Curves

Source/Blaster/Character/BlasterCharacter.cpp

@@ -49,6 +49,8 @@ ABlasterCharacter::ABlasterCharacter()
 	TurningInPlace = ETurningInPlace::ETIP_NotTurning;
 	NetUpdateFrequency = 66.f;
 	MinNetUpdateFrequency = 33.f;
+
+	DissolveTimeline = CreateDefaultSubobject<UTimelineComponent>(TEXT("DissolveTimelineComponent"));
 }
 
 void ABlasterCharacter::BeginPlay()
@@ -120,6 +122,15 @@ void ABlasterCharacter::MulticastEliminated_Implementation()
 {
 	bEliminated = true;
 	PlayEliminatedMontage();
+
+	if (DissolveMaterialInstance)
+	{
+		DynamicDissolveMaterialInstance = UMaterialInstanceDynamic::Create(DissolveMaterialInstance, this);
+		GetMesh()->SetMaterial(0, DynamicDissolveMaterialInstance);
+		DynamicDissolveMaterialInstance->SetScalarParameterValue(TEXT("Dissolve"), 0.55f);
+		DynamicDissolveMaterialInstance->SetScalarParameterValue(TEXT("Glow"), 200.f);
+	}
+	StartDissolve();
 }
 
 void ABlasterCharacter::EliminationTimerFinished()
@@ -477,6 +488,24 @@ void ABlasterCharacter::UpdateHUDHealth()
 	}
 }
 
+void ABlasterCharacter::UpdateDissolveMaterial(float DissolveValue)
+{
+	if (DynamicDissolveMaterialInstance)
+	{
+		DynamicDissolveMaterialInstance->SetScalarParameterValue(TEXT("Dissolve"), DissolveValue);
+	}
+}
+
+void ABlasterCharacter::StartDissolve()
+{
+	DissolveTrack.BindDynamic(this, &ABlasterCharacter::UpdateDissolveMaterial);
+	if (DissolveCurve && DissolveTimeline)
+	{
+		DissolveTimeline->AddInterpFloat(DissolveCurve, DissolveTrack);
+		DissolveTimeline->Play();
+	}
+}
+
 void ABlasterCharacter::SetOverlappingWeapon(AWeapon* Weapon)
 {
 	if (OverlappingWeapon)

Source/Blaster/Character/BlasterCharacter.h

@@ -5,6 +5,7 @@
 #include "CoreMinimal.h"
 #include "Blaster/Interfaces/InteractWithCrosshairInterface.h"
 #include "Blaster/Types/TurningInPlace.h"
+#include "Components/TimelineComponent.h"
 #include "GameFramework/Character.h"
 #include "BlasterCharacter.generated.h"
 
@@ -123,6 +124,26 @@ private:
 	FTimerHandle EliminationTimer;
 
 	void EliminationTimerFinished();
+
+	// Dissolve effect
+	UPROPERTY(VisibleAnywhere)
+	UTimelineComponent* DissolveTimeline;
+	FOnTimelineFloat DissolveTrack;
+
+	UPROPERTY(EditAnywhere)
+	UCurveFloat* DissolveCurve;
+
+	UFUNCTION()
+	void UpdateDissolveMaterial(float DissolveValue);
+	void StartDissolve();
+
+	// Dynamic instance that we can change at runtime
+	UPROPERTY(VisibleAnywhere, Category = Elimination)
+	UMaterialInstanceDynamic* DynamicDissolveMaterialInstance;
+
+	// Material instance set on the Blueprint, used with the dynamic material instance
+	UPROPERTY(EditAnywhere, Category = Elimination)
+	UMaterialInstance* DissolveMaterialInstance;
 	
 public:
 	void SetOverlappingWeapon(AWeapon* Weapon);