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diff --git a/game/server/tf/bot/tf_bot_vision.h b/game/server/tf/bot/tf_bot_vision.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+// tf_bot_vision.h
+// Team Fortress NextBot vision interface
+// Michael Booth, May 2009
+
+#ifndef TF_BOT_VISION_H
+#define TF_BOT_VISION_H
+
+#include "NextBotVisionInterface.h"
+
+//----------------------------------------------------------------------------
+class CTFBotVision : public IVision
+{
+public:
+	CTFBotVision( INextBot *bot ) : IVision( bot )
+	{
+	}
+
+	virtual ~CTFBotVision() { }
+
+	virtual void Update( void );								// update internal state
+
+	/**
+	 * Populate "potentiallyVisible" with the set of all entities we could potentially see. 
+	 * Entities in this set will be tested for visibility/recognition in IVision::Update()
+	 */
+	virtual void CollectPotentiallyVisibleEntities( CUtlVector< CBaseEntity * > *potentiallyVisible );
+
+	virtual bool IsIgnored( CBaseEntity *subject ) const;		// return true to completely ignore this entity (may not be in sight when this is called)
+	virtual bool IsVisibleEntityNoticed( CBaseEntity *subject ) const;		// return true if we 'notice' the subject, even though we have LOS to it
+
+	virtual float GetMaxVisionRange( void ) const;				// return maximum distance vision can reach
+	virtual float GetMinRecognizeTime( void ) const;			// return VISUAL reaction time
+
+private:
+	CUtlVector< CHandle< CBaseCombatCharacter > > m_potentiallyVisibleNPCVector;
+	CountdownTimer m_potentiallyVisibleUpdateTimer;
+	void UpdatePotentiallyVisibleNPCVector( void );
+
+	CountdownTimer m_scanTimer;
+};
+
+
+#endif // TF_BOT_VISION_H
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