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diff --git a/public/view_shared.h b/public/view_shared.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+//=============================================================================//
+
+#ifndef VIEW_SHARED_H
+#define VIEW_SHARED_H
+
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "convar.h"
+#include "mathlib/vector.h"
+#include "materialsystem/MaterialSystemUtil.h"
+
+
+//-----------------------------------------------------------------------------
+// Flags passed in with view setup
+//-----------------------------------------------------------------------------
+enum ClearFlags_t
+{
+	VIEW_CLEAR_COLOR = 0x1,
+	VIEW_CLEAR_DEPTH = 0x2,
+	VIEW_CLEAR_FULL_TARGET = 0x4,
+	VIEW_NO_DRAW = 0x8,
+	VIEW_CLEAR_OBEY_STENCIL = 0x10, // Draws a quad allowing stencil test to clear through portals
+	VIEW_CLEAR_STENCIL = 0x20,
+};
+
+enum StereoEye_t
+{
+	STEREO_EYE_MONO = 0,
+	STEREO_EYE_LEFT = 1,
+	STEREO_EYE_RIGHT = 2,
+	STEREO_EYE_MAX = 3,
+};
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Renderer setup data.  
+//-----------------------------------------------------------------------------
+class CViewSetup
+{
+public:
+	CViewSetup()
+	{
+		m_flAspectRatio = 0.0f;
+		m_bRenderToSubrectOfLargerScreen = false;
+		m_bDoBloomAndToneMapping = true;
+		m_bOrtho = false;
+		m_bOffCenter = false;
+		m_bCacheFullSceneState = false;
+//		m_bUseExplicitViewVector = false;
+        m_bViewToProjectionOverride = false;
+		m_eStereoEye = STEREO_EYE_MONO;
+	}
+
+// shared by 2D & 3D views
+
+	// left side of view window
+	int			x;					
+	int			m_nUnscaledX;
+	// top side of view window
+	int			y;					
+	int			m_nUnscaledY;
+	// width of view window
+	int			width;				
+	int			m_nUnscaledWidth;
+	// height of view window
+	int			height;				
+	// which eye are we rendering?
+	StereoEye_t m_eStereoEye;
+	int			m_nUnscaledHeight;
+
+// the rest are only used by 3D views
+
+	// Orthographic projection?
+	bool		m_bOrtho;			
+	// View-space rectangle for ortho projection.
+	float		m_OrthoLeft;		
+	float		m_OrthoTop;
+	float		m_OrthoRight;
+	float		m_OrthoBottom;
+
+	// horizontal FOV in degrees
+	float		fov;				
+	// horizontal FOV in degrees for in-view model
+	float		fovViewmodel;		
+
+	// 3D origin of camera
+	Vector		origin;					
+
+	// heading of camera (pitch, yaw, roll)
+	QAngle		angles;				
+	// local Z coordinate of near plane of camera
+	float		zNear;			
+		// local Z coordinate of far plane of camera
+	float		zFar;			
+
+	// local Z coordinate of near plane of camera ( when rendering view model )
+	float		zNearViewmodel;		
+	// local Z coordinate of far plane of camera ( when rendering view model )
+	float		zFarViewmodel;		
+
+	// set to true if this is to draw into a subrect of the larger screen
+	// this really is a hack, but no more than the rest of the way this class is used
+	bool		m_bRenderToSubrectOfLargerScreen;
+
+	// The aspect ratio to use for computing the perspective projection matrix
+	// (0.0f means use the viewport)
+	float		m_flAspectRatio;
+
+	// Controls for off-center projection (needed for poster rendering)
+	bool		m_bOffCenter;
+	float		m_flOffCenterTop;
+	float		m_flOffCenterBottom;
+	float		m_flOffCenterLeft;
+	float		m_flOffCenterRight;
+
+	// Control that the SFM needs to tell the engine not to do certain post-processing steps
+	bool		m_bDoBloomAndToneMapping;
+
+	// Cached mode for certain full-scene per-frame varying state such as sun entity coverage
+	bool		m_bCacheFullSceneState;
+
+    // If using VR, the headset calibration will feed you a projection matrix per-eye.
+	// This does NOT override the Z range - that will be set up as normal (i.e. the values in this matrix will be ignored).
+    bool        m_bViewToProjectionOverride;
+    VMatrix     m_ViewToProjection;
+};
+
+
+
+#endif // VIEW_SHARED_H