CameraModifier_Crouching

CameraModifier_Crouching.cpp

// Header

#include "Camera/CameraModifier.h"

#include "MESS_CameraModifier_Crouching.generated.h"

/**
 * 
 */
UCLASS()
class MESS_API UMESS_CameraModifier_Crouching
	: public UCameraModifier
{
	GENERATED_BODY()

public:
	//~UCameraModifier Interface
	virtual bool ModifyCamera(float DeltaTime, FMinimalViewInfo& InOutPOV) override;
	//~End of UCameraModifier Interface

	UFUNCTION(BlueprintNativeEvent)
	float GetBlendSpeed() const;

private:
	UPROPERTY(EditAnywhere)
	float GroundBlendSpeed = 15.f;
	
	UPROPERTY(EditAnywhere)
	float AirBlendSpeed = 40.f;
	
	float CurrentEyeHeight = 0.f;
};

// Source

#include "Player/Camera/MESS_CameraModifier_Crouching.h"

#include "GameFramework/Character.h"
#include "GameFramework/CharacterMovementComponent.h"

bool UMESS_CameraModifier_Crouching::ModifyCamera(float DeltaTime, FMinimalViewInfo& InOutPOV)
{
	const AActor* ViewTarget = GetViewTarget();
	const auto* ViewTarget_Pawn = Cast<APawn>(ViewTarget);
	if (!IsValid(ViewTarget_Pawn))
	{
		return Super::ModifyCamera(DeltaTime, InOutPOV);
	}

	const FVector EyesViewLocation = ViewTarget_Pawn->GetPawnViewLocation();
	if (FMath::IsNearlyEqual(CurrentEyeHeight, EyesViewLocation.Z, 1.f))
	{
		CurrentEyeHeight = EyesViewLocation.Z;
	}
	else
	{
		const float BlendSpeed = GetBlendSpeed();
		CurrentEyeHeight = FMath::FInterpTo(CurrentEyeHeight, EyesViewLocation.Z, DeltaTime, BlendSpeed);
	}
	
	InOutPOV.Location.Z = CurrentEyeHeight;

	return true;
}

float UMESS_CameraModifier_Crouching::GetBlendSpeed_Implementation() const
{
	const AActor* ViewTarget = GetViewTarget();
	const auto* ViewTarget_Character = Cast<ACharacter>(ViewTarget);
	if (IsValid(ViewTarget_Character))
	{
		if (ViewTarget_Character->GetCharacterMovement()->IsFalling())
		{
			return AirBlendSpeed;
		}
	}

	return GroundBlendSpeed;
}

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