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diff --git a/game/shared/vehicle_viewblend_shared.h b/game/shared/vehicle_viewblend_shared.h
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+++ b/game/shared/vehicle_viewblend_shared.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================
+
+#ifndef VEHICLE_VIEWBLEND_SHARED_H
+#define VEHICLE_VIEWBLEND_SHARED_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+// Definition for how to calculate a point on the remap curve
+enum RemapAngleRange_CurvePart_t
+{
+	RemapAngleRange_CurvePart_Zero = 0,
+	RemapAngleRange_CurvePart_Spline,
+	RemapAngleRange_CurvePart_Linear,
+};
+
+// If we enter the linear part of the remap for curve for any degree of freedom, we can lock
+// that DOF (stop remapping). This is useful for making flips feel less spastic as we oscillate
+// randomly between different parts of the remapping curve.
+struct ViewLockData_t
+{
+	float	flLockInterval;			// The duration to lock the view when we lock it for this degree of freedom.
+	// 0 = never lock this degree of freedom.
+
+	bool	bLocked;				// True if this DOF was locked because of the above condition.
+
+	float	flUnlockTime;			// If this DOF is locked, the time when we will unlock it.
+
+	float	flUnlockBlendInterval;	// If this DOF is locked, how long to spend blending out of the locked view when we unlock.
+};
+
+// This is separate from the base vehicle implementation so that any class 
+// that derives from IClientVehicle can use it. To use it, contain one of the
+// following structs, fill out the first section, and then call VehicleViewSmoothing()
+// inside your GetVehicleViewPosition() function.
+struct ViewSmoothingData_t
+{
+	DECLARE_SIMPLE_DATADESC();
+
+	// Fill these out in your vehicle
+	CBaseAnimating	*pVehicle;
+	bool	bClampEyeAngles;	// Perform eye Z clamping
+	float	flPitchCurveZero;	// Pitch values below this are clamped to zero.
+	float	flPitchCurveLinear;	// Pitch values above this are mapped directly.
+	//		Spline in between.
+	float	flRollCurveZero;	// Pitch values below this are clamped to zero.
+	float	flRollCurveLinear;	// Roll values above this are mapped directly.
+	//		Spline in between.
+	float	flFOV;				// FOV when in the vehicle.
+
+	ViewLockData_t pitchLockData;
+	ViewLockData_t rollLockData;
+
+	bool	bDampenEyePosition;	// Only set to true for C_PropVehicleDriveable derived vehicles
+
+	// Don't change these, they're used by VehicleViewSmoothing()
+	bool	bRunningEnterExit;
+	bool	bWasRunningAnim;
+	float	flEnterExitStartTime;	// Time we began our animation at
+	float	flEnterExitDuration;	// Duration of the animation
+	QAngle	vecAnglesSaved;
+	Vector	vecOriginSaved;
+	QAngle	vecAngleDiffSaved;	// The original angular error between the entry/exit anim and player's view when we started playing the anim.
+	QAngle	vecAngleDiffMin;	// Tracks the minimum angular error achieved so we can converge on the anim's angles.
+};
+
+// TEMP: Shared vehicle view smoothing
+void SharedVehicleViewSmoothing(CBasePlayer *pPlayer, 
+								Vector *pAbsOrigin, QAngle *pAbsAngles, 
+								bool bEnterAnimOn, bool bExitAnimOn, 
+								const Vector &vecEyeExitEndpoint, 
+								ViewSmoothingData_t *pData, 
+								float *pFOV );
+
+#endif // VEHICLE_VIEWBLEND_SHARED_H