blaster/Source/Blaster/Character/BlasterAnimInstance.cpp

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#include "BlasterAnimInstance.h"

#include "BlasterCharacter.h"
#include "Blaster/Weapon/Weapon.h"
#include "GameFramework/CharacterMovementComponent.h"
#include "Kismet/KismetMathLibrary.h"

void UBlasterAnimInstance::NativeInitializeAnimation()
{
	Super::NativeInitializeAnimation();

	BlasterCharacter = Cast<ABlasterCharacter>(TryGetPawnOwner());
}

void UBlasterAnimInstance::NativeUpdateAnimation(float DeltaSeconds)
{
	Super::NativeUpdateAnimation(DeltaSeconds);

	if (BlasterCharacter == nullptr)
	{
		BlasterCharacter = Cast<ABlasterCharacter>(TryGetPawnOwner());
	}

	if (BlasterCharacter == nullptr) return;

	FVector Velocity = BlasterCharacter->GetVelocity();
	Velocity.Z = 0.f;
	Speed = Velocity.Size();

	bIsInAir = BlasterCharacter->GetCharacterMovement()->IsFalling();
	bIsAccelerating = BlasterCharacter->GetCharacterMovement()->GetCurrentAcceleration().Size() > 0.f;
	bWeaponEquipped = BlasterCharacter->IsWeaponEquipped();
	EquippedWeapon = BlasterCharacter->GetEquippedWeapon();
	bIsCrouched = BlasterCharacter->bIsCrouched;
	bAiming = BlasterCharacter->IsAiming();
	TurningInPlace = BlasterCharacter->GetTurningInPlace();
	bRotateRootBone = BlasterCharacter->ShouldRotateRootBone();
	bEliminated = BlasterCharacter->IsEliminated();
	// Offset Yaw for Strafing
	FRotator AimRotation = BlasterCharacter->GetBaseAimRotation();
	FRotator MovementRotation = UKismetMathLibrary::MakeRotFromX(BlasterCharacter->GetVelocity());
	FRotator DeltaRot = UKismetMathLibrary::NormalizedDeltaRotator(MovementRotation, AimRotation);
	DeltaRotation = FMath::RInterpTo(DeltaRotation, DeltaRot, DeltaSeconds, 6.f);
	YawOffset = DeltaRotation.Yaw;
	
	CharacterRotationLastFrame = CharacterRotation;
	CharacterRotation = BlasterCharacter->GetActorRotation();
	const FRotator Delta = UKismetMathLibrary::NormalizedDeltaRotator(CharacterRotation, CharacterRotationLastFrame);
	const float Target = Delta.Yaw / DeltaSeconds;
	const float Interp = FMath::FInterpTo(Lean, Target, DeltaSeconds, 6.f);
	Lean = FMath::Clamp(Interp, -90.f, 90.f);

	// Aim offset
	AO_Yaw = BlasterCharacter->GetAO_Yaw();
	AO_Pitch = BlasterCharacter->GetAO_Pitch();
	
	if (bWeaponEquipped && EquippedWeapon && EquippedWeapon->GetWeaponMesh() && BlasterCharacter->GetMesh())
	{
		LeftHandTransform = EquippedWeapon->GetWeaponMesh()->GetSocketTransform(FName("LeftHandSocket"), RTS_World);
		FVector OutPosition;
		FRotator OutRotation;
		BlasterCharacter->GetMesh()->TransformToBoneSpace(FName("hand_r"), LeftHandTransform.GetLocation(), FRotator::ZeroRotator, OutPosition, OutRotation);
		LeftHandTransform.SetLocation(OutPosition);
		LeftHandTransform.SetRotation(FQuat(OutRotation));

		if (BlasterCharacter->IsLocallyControlled())
		{
			bLocallyControlled = true;
			const FTransform RightHandTransform = EquippedWeapon->GetWeaponMesh()->GetSocketTransform(FName("Hand_R"), RTS_World);
			FRotator LookAtRotation = UKismetMathLibrary::FindLookAtRotation(RightHandTransform.GetLocation(), RightHandTransform.GetLocation() + (RightHandTransform.GetLocation() - BlasterCharacter->GetHitTarget()));
			RightHandRotation = FMath::RInterpTo(RightHandRotation, LookAtRotation, DeltaSeconds, 30.f);
		}
	}

	bUseFABRIK = BlasterCharacter->GetCombatState() != ECombatState::ECS_Reloading;
	bUseAimOffsets = BlasterCharacter->GetCombatState() != ECombatState::ECS_Reloading;
	bTransformRightHand = BlasterCharacter->GetCombatState() != ECombatState::ECS_Reloading;
}