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game/server/ai_eventresponse.h

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+//========= Copyright <20> 1996-2005, Valve Corporation, All rights reserved. ============//
+//
+// Purpose: AI system that makes NPCs verbally respond to game events
+//
+//=============================================================================//
+
+#ifndef	AI_EVENTRESPONSE_H
+#define	AI_EVENTRESPONSE_H
+
+#include "utldict.h"
+
+#define NPCEVENTRESPONSE_DISTANCE_SQR		(768 * 768) // Maximum distance for responding to NPCs
+#define NPCEVENTRESPONSE_REFIRE_TIME		15.0		// Time after giving a response before giving any more
+#define NPCEVENTRESPONSE_GIVEUP_TIME		4.0			// Time after a response trigger was fired before discarding it without responding
+
+//-----------------------------------------------------------------------------
+// Purpose: AI system that makes NPCs verbally respond to game events
+//-----------------------------------------------------------------------------
+class CNPCEventResponseSystem : public CAutoGameSystemPerFrame
+{
+public:
+	CNPCEventResponseSystem( char const *name ) : CAutoGameSystemPerFrame( name )
+	{
+	}
+
+	void	LevelInitPreEntity();
+	void	FrameUpdatePreEntityThink();
+	void	TriggerEvent( const char *pResponse, bool bForce, bool bCancelScript );
+
+private:
+	float	m_flNextEventPoll;
+
+	struct storedevent_t
+	{
+		float	flEventTime;
+		float	flNextResponseTime;
+		bool	bForce;
+		bool	bCancelScript;
+		bool	bPreventExpiration;
+	};
+
+	typedef CUtlDict< storedevent_t, int > EventMap;
+	EventMap m_ActiveEvents;
+};
+
+CNPCEventResponseSystem	*NPCEventResponse();
+
+#endif // AI_EVENTRESPONSE_H