Creating an Effect (C++)

Effects now use a single-class model.

Create one class derived from UEDInteractionEffect and override the lifecycle you need:

• OnStart_Implementation()
• OnTick_Implementation(float DeltaSeconds)
• OnFinish_Implementation()

Example:

#include "Effects/EDInteractionEffect.h"
#include "Components/PrimitiveComponent.h"

#include "MyEffect.generated.h"

UCLASS()
class UMyEffect : public UEDInteractionEffect
{
	GENERATED_BODY()

public:
	UMyEffect()
	{
		Channel = TEXT("MyEffect");
	}

protected:
	virtual void OnStart_Implementation() override
	{
		Super::OnStart_Implementation();

		if (UPrimitiveComponent* Target = GetTargetComponent())
		{
			Target->AddLocalOffset(FVector(0.f, 0.f, 2.f));
		}
	}

	virtual void OnTick_Implementation(float DeltaSeconds) override
	{
		Super::OnTick_Implementation(DeltaSeconds);

		if (GetElapsedSeconds() >= 0.2f)
		{
			Finish();
		}
	}

	virtual void OnFinish_Implementation() override
	{
		if (UPrimitiveComponent* Target = GetTargetComponent())
		{
			Target->AddLocalOffset(FVector(0.f, 0.f, -2.f));
		}

		Super::OnFinish_Implementation();
	}
};

Useful notes:

• The same class is used for authoring and runtime spawning.
• Default property values on your class are copied into each runtime effect object.
• GetEffectContext() gives you the full interaction context.
• GetPreferredEffectLocation() and GetPreferredEffectNormal() are good defaults when your effect wants a hit-driven point in space.
• Call Finish() when your effect is done.

Then add UMyEffect to the arrays in UEDInteractionEffectsComponent (or to foliage effect configuration where applicable).