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diff --git a/engine/staticpropmgr.h b/engine/staticpropmgr.h
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+++ b/engine/staticpropmgr.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $Revision: $
+// $NoKeywords: $
+//
+// This file contains a little interface to deal with static prop collisions
+//
+//=============================================================================//
+
+#ifndef STATICPROPMGR_H
+#define STATICPROPMGR_H
+
+#include "mathlib/vector.h"
+#include "engine/IStaticPropMgr.h"
+
+// FIXME: Remove! Only here for the test against old code
+#include "enginetrace.h"
+
+
+//-----------------------------------------------------------------------------
+// foward declarations
+//-----------------------------------------------------------------------------
+class ICollideable;
+FORWARD_DECLARE_HANDLE( LightCacheHandle_t );
+class IPooledVBAllocator;
+
+
+//-----------------------------------------------------------------------------
+// The engine's static prop manager
+//-----------------------------------------------------------------------------
+abstract_class IStaticPropMgrEngine
+{
+public:
+	virtual bool Init() = 0;
+	virtual void Shutdown() = 0;
+
+	// Call at the beginning of the level, will unserialize all static
+	// props and add them to the main collision tree
+	virtual void LevelInit() = 0;
+
+	// Call this when there's a client, *after* LevelInit, and after the world entity is loaded
+	virtual void LevelInitClient() = 0;
+
+	// Call this when there's a client, *before* LevelShutdown
+	virtual void LevelShutdownClient() = 0;
+
+	// Call at the end of the level, cleans up the static props
+	virtual void LevelShutdown() = 0;
+
+	// Call this to recompute static prop lighting when necessary
+	virtual void RecomputeStaticLighting() = 0;
+
+	// Check if a static prop is in a particular PVS.
+	virtual bool IsPropInPVS( IHandleEntity *pHandleEntity, const byte *pVis ) const = 0;
+
+	// returns a collideable interface to static props
+	virtual ICollideable *GetStaticProp( IHandleEntity *pHandleEntity ) = 0;
+
+	// returns the lightcache handle associated with a static prop
+	virtual LightCacheHandle_t GetLightCacheHandleForStaticProp( IHandleEntity *pHandleEntity ) = 0;
+
+	// Is a base handle a static prop?
+	virtual bool IsStaticProp( IHandleEntity *pHandleEntity ) const = 0;
+	virtual bool IsStaticProp( CBaseHandle handle ) const = 0;
+
+	// Returns the static prop index (useful for networking)
+	virtual int GetStaticPropIndex( IHandleEntity *pHandleEntity ) const = 0;
+
+	virtual bool PropHasBakedLightingDisabled( IHandleEntity *pHandleEntity) const = 0;
+};
+
+
+//-----------------------------------------------------------------------------
+// Singleton access
+//-----------------------------------------------------------------------------
+IStaticPropMgrEngine* StaticPropMgr();
+
+
+#endif	// STATICPROPMGR_H