Feet face aim yaw when leaning

src/game/client/c_baseanimating.cpp

@@ -1421,6 +1421,15 @@ void C_BaseAnimating::GetBoneControllers(float controllers[MAXSTUDIOBONECTRLS])
 	}
 }
 
+#ifdef NEO
+float C_BaseAnimating::GetBoneController(int iController) const
+{
+	if (IN_BETWEEN_AR(0, iController, MAXSTUDIOBONECTRLS))
+		return m_flEncodedController[ iController ];
+	return 0.f;
+}
+#endif // NEO
+
 float C_BaseAnimating::GetPoseParameter( int iPoseParameter )
 {
 	CStudioHdr *pStudioHdr = GetModelPtr();

src/game/client/c_baseanimating.h

@@ -119,6 +119,9 @@ class C_BaseAnimating : public C_BaseEntity, private IModelLoadCallback
 
 	// Get bone controller values.
 	virtual void	GetBoneControllers(float controllers[MAXSTUDIOBONECTRLS]);
+#ifdef NEO
+	float			GetBoneController(int iController) const;
+#endif // NEO
 	virtual float	SetBoneController ( int iController, float flValue );
 
 	LocalFlexController_t GetNumFlexControllers( void );

src/game/shared/Multiplayer/multiplayer_animstate.cpp

@@ -2247,8 +2247,13 @@ void CMultiPlayerAnimState::ConvergeYawAngles( float flGoalYaw, float flYawRate,
 
 	// Find the yaw delta.
 	float flDeltaYaw = flGoalYaw - flCurrentYaw;
+#ifdef NEO
+	flDeltaYaw = AngleNormalize( flDeltaYaw );
+	float flDeltaYawAbs = fabs( flDeltaYaw );
+#else
 	float flDeltaYawAbs = fabs( flDeltaYaw );
 	flDeltaYaw = AngleNormalize( flDeltaYaw );
+#endif // NEO
 
 	// Always do at least a bit of the turn (1%).
 	float flScale = 1.0f;

src/game/shared/hl2mp/hl2mp_playeranimstate.cpp

@@ -752,8 +752,13 @@ void CHL2MPPlayerAnimState::ComputePoseParam_AimYaw( CStudioHdr *pStudioHdr )
 	// Check to see if we are moving.
 	bool bMoving = ( vecVelocity.Length() > 1.0f ) ? true : false;
 
+#ifdef NEO
+	// If we are moving or leaning or are prone and undeployed.
+	if ( bMoving || m_bForceAimYaw || IsLeaning(pStudioHdr) )
+#else
 	// If we are moving or are prone and undeployed.
 	if ( bMoving || m_bForceAimYaw )
+#endif // NEO
 	{
 		// The feet match the eye direction when moving - the move yaw takes care of the rest.
 		m_flGoalFeetYaw = m_flEyeYaw;
@@ -819,13 +824,21 @@ void CHL2MPPlayerAnimState::ComputePoseParam_AimYaw( CStudioHdr *pStudioHdr )
 
 	// Turn off a force aim yaw - either we have already updated or we don't need to.
 	m_bForceAimYaw = false;
+#ifdef NEO
+	// NEO JANK (Adam) this fixes the stuttering animation when players turn their camera while their feet are planted in one spot. Probably not the right way to do it
+	// NEO TODO (Adam) I'm sure this is done server side only for a reason, also this doesn't work great if the local player is in third person, find correct fix for this?
+	QAngle angle = GetBasePlayer()->GetAbsAngles();
+	angle[YAW] = m_flCurrentFeetYaw;
 
+	GetBasePlayer()->SetAbsAngles( angle );
+#else
 #ifndef CLIENT_DLL
 	QAngle angle = GetBasePlayer()->GetAbsAngles();
 	angle[YAW] = m_flCurrentFeetYaw;
 
 	GetBasePlayer()->SetAbsAngles( angle );
 #endif
+#endif // NEO
 }
 
 //-----------------------------------------------------------------------------
@@ -870,6 +883,23 @@ float CHL2MPPlayerAnimState::GetCurrentMaxGroundSpeed()
 	return speed;
 }
 
+#ifdef NEO
+bool CHL2MPPlayerAnimState::IsLeaning(CStudioHdr *pStudioHdr)
+{
+	if (CBaseAnimating* pBaseAnimating = GetBasePlayer()->GetBaseAnimating())
+	{
+		constexpr int LEAN_BONE_CONTROLLER = 0;
+#ifdef CLIENT_DLL
+		constexpr float BONE_CONTROLLER_VALUE_NOT_LEANING = 0.5f;
+#else
+		constexpr int BONE_CONTROLLER_VALUE_NOT_LEANING = 0;
+#endif // CLIENT_DLL
+		return pBaseAnimating->GetBoneController(LEAN_BONE_CONTROLLER) != BONE_CONTROLLER_VALUE_NOT_LEANING;
+	}
+	return false;
+}
+#endif // NEO
+
 // -----------------------------------------------------------------------------
 void CHL2MPPlayerAnimState::AnimStateLog(const char* pMsg, ...)
 {

src/game/shared/hl2mp/hl2mp_playeranimstate.h

@@ -62,6 +62,10 @@ class CHL2MPPlayerAnimState : public CMultiPlayerAnimState
 	virtual void				ComputePoseParam_AimPitch( CStudioHdr *pStudioHdr );
 	virtual void				ComputePoseParam_AimYaw( CStudioHdr *pStudioHdr );
 
+#ifdef NEO
+	bool	IsLeaning(CStudioHdr *pStudioHdr);
+#endif // NEO
+
 	CHL2MP_Player   *m_pHL2MPPlayer;
 #ifndef NEO
 	bool		m_bInAirWalk;