56 - Applying Aim Offsets

Source/Blaster/Character/BlasterAnimInstance.cpp

@@ -48,4 +48,7 @@ void UBlasterAnimInstance::NativeUpdateAnimation(float DeltaSeconds)
 	const float Target = Delta.Yaw / DeltaSeconds;
 	const float Interp = FMath::FInterpTo(Lean, Target, DeltaSeconds, 6.f);
 	Lean = FMath::Clamp(Interp, -90.f, 90.f);
+
+	AO_Yaw = BlasterCharacter->GetAO_Yaw();
+	AO_Pitch = BlasterCharacter->GetAO_Pitch();
 }

Source/Blaster/Character/BlasterAnimInstance.h

@@ -47,6 +47,12 @@ private:
 
 	UPROPERTY(BlueprintReadOnly, Category="Movement", meta=(AllowPrivateAccess = "true"))
 	float Lean;
+	
+	UPROPERTY(BlueprintReadOnly, Category="Movement", meta=(AllowPrivateAccess = "true"))
+	float AO_Yaw;
+	
+	UPROPERTY(BlueprintReadOnly, Category="Movement", meta=(AllowPrivateAccess = "true"))
+	float AO_Pitch;
 
 	FRotator CharacterRotationLastFrame;
 	FRotator CharacterRotation;

Source/Blaster/Character/BlasterCharacter.cpp

@@ -10,6 +10,7 @@
 #include "Components/WidgetComponent.h"
 #include "GameFramework/CharacterMovementComponent.h"
 #include "GameFramework/SpringArmComponent.h"
+#include "Kismet/KismetMathLibrary.h"
 #include "Net/UnrealNetwork.h"
 
 
@@ -65,6 +66,8 @@ void ABlasterCharacter::BeginPlay()
 void ABlasterCharacter::Tick(float DeltaTime)
 {
 	Super::Tick(DeltaTime);
+
+	AimOffset(DeltaTime);
 }
 
 void ABlasterCharacter::SetupPlayerInputComponent(UInputComponent* PlayerInputComponent)
@@ -158,6 +161,32 @@ void ABlasterCharacter::AimButtonReleased()
 	}
 }
 
+void ABlasterCharacter::AimOffset(float DeltaTime)
+{
+	if (Combat && Combat->EquippedWeapon == nullptr) return;
+	
+	FVector Velocity = GetVelocity();
+	Velocity.Z = 0.f;
+	float Speed = Velocity.Size();
+	bool bIsInAir = GetCharacterMovement()->IsFalling();
+
+	if (Speed == 0.f && !bIsInAir) // Standing still, not jumping
+	{
+		FRotator CurrentAimRotation = FRotator(0.f, GetBaseAimRotation().Yaw, 0.f);
+		FRotator DeltaAimRotation = UKismetMathLibrary::NormalizedDeltaRotator(CurrentAimRotation, StartingAimRotation);
+		AO_Yaw = DeltaAimRotation.Yaw;
+		bUseControllerRotationYaw = false;
+	}
+	if (Speed > 0.f || bIsInAir) // Running or jumping
+	{
+		StartingAimRotation = FRotator(0.f, GetBaseAimRotation().Yaw, 0.f);
+		AO_Yaw = 0.f;
+		bUseControllerRotationYaw = true;
+	}
+
+	AO_Pitch = GetBaseAimRotation().Pitch;
+}
+
 void ABlasterCharacter::ServerEquipButtonPressed_Implementation()
 {
 	EquipButtonPressed();

Source/Blaster/Character/BlasterCharacter.h

@@ -29,6 +29,7 @@ protected:
 	void CrouchButtonPressed();
 	void AimButtonPressed();
 	void AimButtonReleased();
+	void AimOffset(float DeltaTime);
 
 private:
 	UPROPERTY(VisibleAnywhere, Category="Camera")
@@ -51,8 +52,14 @@ private:
 
 	UFUNCTION(Server, Reliable)
 	void ServerEquipButtonPressed();
+
+	float AO_Yaw;
+	float AO_Pitch;
+	FRotator StartingAimRotation;
 public:
 	void SetOverlappingWeapon(AWeapon* Weapon);
 	bool IsWeaponEquipped();
 	bool IsAiming();
+	FORCEINLINE float GetAO_Yaw() const { return AO_Yaw; };
+	FORCEINLINE float GetAO_Pitch() const { return AO_Pitch; };
 };