1 files changed, 5048 insertions, 0 deletions
diff --git a/mp/src/game/server/hl2/npc_antlionguard.cpp b/mp/src/game/server/hl2/npc_antlionguard.cpp
new file mode 100644
index 00000000..02c880e9
--- /dev/null
+++ b/mp/src/game/server/hl2/npc_antlionguard.cpp
@@ -0,0 +1,5048 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose:	Antlion Guard
+//
+//=============================================================================//
+
+#include "cbase.h"
+#include "ai_hint.h"
+#include "ai_localnavigator.h"
+#include "ai_memory.h"
+#include "ai_moveprobe.h"
+#include "npcevent.h"
+#include "IEffects.h"
+#include "ndebugoverlay.h"
+#include "soundent.h"
+#include "soundenvelope.h"
+#include "ai_squad.h"
+#include "ai_network.h"
+#include "ai_pathfinder.h"
+#include "ai_navigator.h"
+#include "ai_senses.h"
+#include "npc_rollermine.h"
+#include "ai_blended_movement.h"
+#include "physics_prop_ragdoll.h"
+#include "iservervehicle.h"
+#include "player_pickup.h"
+#include "props.h"
+#include "antlion_dust.h"
+#include "npc_antlion.h"
+#include "decals.h"
+#include "prop_combine_ball.h"
+#include "eventqueue.h"
+#include "te_effect_dispatch.h"
+#include "Sprite.h"
+#include "particle_parse.h"
+#include "particle_system.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+inline void TraceHull_SkipPhysics( const Vector &vecAbsStart, const Vector &vecAbsEnd, const Vector &hullMin, 
+					 const Vector &hullMax,	unsigned int mask, const CBaseEntity *ignore, 
+					 int collisionGroup, trace_t *ptr, float minMass );
+
+ConVar	g_debug_antlionguard( "g_debug_antlionguard", "0" );
+ConVar	sk_antlionguard_dmg_charge( "sk_antlionguard_dmg_charge", "0" );
+ConVar	sk_antlionguard_dmg_shove( "sk_antlionguard_dmg_shove", "0" );
+
+#if HL2_EPISODIC
+// When enabled, add code to have the antlion bleed profusely as it is badly injured.
+#define ANTLIONGUARD_BLOOD_EFFECTS 2
+ConVar	g_antlionguard_hemorrhage( "g_antlionguard_hemorrhage", "1", FCVAR_NONE, "If 1, guard will emit a bleeding particle effect when wounded." );
+#endif
+
+// Spawnflags 
+#define	SF_ANTLIONGUARD_SERVERSIDE_RAGDOLL	( 1 << 16 )
+#define SF_ANTLIONGUARD_INSIDE_FOOTSTEPS	( 1 << 17 )
+
+#define	ENVELOPE_CONTROLLER		(CSoundEnvelopeController::GetController())
+#define	ANTLIONGUARD_MODEL		"models/antlion_guard.mdl"
+#define	MIN_BLAST_DAMAGE		25.0f
+#define MIN_CRUSH_DAMAGE		20.0f
+
+//==================================================
+//
+// Antlion Guard
+//
+//==================================================
+
+#define ANTLIONGUARD_MAX_OBJECTS				128
+#define	ANTLIONGUARD_MIN_OBJECT_MASS			8
+#define	ANTLIONGUARD_MAX_OBJECT_MASS			750
+#define	ANTLIONGUARD_FARTHEST_PHYSICS_OBJECT	350
+#define ANTLIONGUARD_OBJECTFINDING_FOV			DOT_45DEGREE // 1/sqrt(2)
+
+//Melee definitions
+#define	ANTLIONGUARD_MELEE1_RANGE		156.0f
+#define	ANTLIONGUARD_MELEE1_CONE		0.7f
+
+// Antlion summoning
+#define ANTLIONGUARD_SUMMON_COUNT		3
+
+// Sight
+#define	ANTLIONGUARD_FOV_NORMAL			-0.4f
+
+// cavern guard's poisoning behavior
+#if HL2_EPISODIC
+#define ANTLIONGUARD_POISON_TO			12 // we only poison Gordon down to twelve to give him a chance to regen up to 20 by the next charge
+#endif
+
+#define	ANTLIONGUARD_CHARGE_MIN			256
+#define	ANTLIONGUARD_CHARGE_MAX			2048
+
+ConVar	sk_antlionguard_health( "sk_antlionguard_health", "0" );
+
+int	g_interactionAntlionGuardFoundPhysicsObject = 0;	// We're moving to a physics object to shove it, don't all choose the same object
+int	g_interactionAntlionGuardShovedPhysicsObject = 0;	// We've punted an object, it is now clear to be chosen by others
+
+//==================================================
+// AntlionGuardSchedules
+//==================================================
+
+enum
+{
+	SCHED_ANTLIONGUARD_CHARGE = LAST_SHARED_SCHEDULE,
+	SCHED_ANTLIONGUARD_CHARGE_CRASH,
+	SCHED_ANTLIONGUARD_CHARGE_CANCEL,
+	SCHED_ANTLIONGUARD_PHYSICS_ATTACK,
+	SCHED_ANTLIONGUARD_PHYSICS_DAMAGE_HEAVY,
+	SCHED_ANTLIONGUARD_UNBURROW,
+	SCHED_ANTLIONGUARD_CHARGE_TARGET,
+	SCHED_ANTLIONGUARD_FIND_CHARGE_POSITION,
+	SCHED_ANTLIONGUARD_MELEE_ATTACK1,
+	SCHED_ANTLIONGUARD_SUMMON,
+	SCHED_ANTLIONGUARD_PATROL_RUN,
+	SCHED_ANTLIONGUARD_ROAR,
+	SCHED_ANTLIONGUARD_CHASE_ENEMY_TOLERANCE,
+	SCHED_FORCE_ANTLIONGUARD_PHYSICS_ATTACK,
+	SCHED_ANTLIONGUARD_CANT_ATTACK,
+	SCHED_ANTLIONGUARD_TAKE_COVER_FROM_ENEMY,
+	SCHED_ANTLIONGUARD_CHASE_ENEMY
+};
+
+
+//==================================================
+// AntlionGuardTasks
+//==================================================
+
+enum
+{
+	TASK_ANTLIONGUARD_CHARGE = LAST_SHARED_TASK,
+	TASK_ANTLIONGUARD_GET_PATH_TO_PHYSOBJECT,
+	TASK_ANTLIONGUARD_SHOVE_PHYSOBJECT,
+	TASK_ANTLIONGUARD_SUMMON,
+	TASK_ANTLIONGUARD_SET_FLINCH_ACTIVITY,
+	TASK_ANTLIONGUARD_GET_PATH_TO_CHARGE_POSITION,
+	TASK_ANTLIONGUARD_GET_PATH_TO_NEAREST_NODE,
+	TASK_ANTLIONGUARD_GET_CHASE_PATH_ENEMY_TOLERANCE,
+	TASK_ANTLIONGUARD_OPPORTUNITY_THROW,
+	TASK_ANTLIONGUARD_FIND_PHYSOBJECT,
+};
+
+//==================================================
+// AntlionGuardConditions
+//==================================================
+
+enum
+{
+	COND_ANTLIONGUARD_PHYSICS_TARGET = LAST_SHARED_CONDITION,
+	COND_ANTLIONGUARD_PHYSICS_TARGET_INVALID,
+	COND_ANTLIONGUARD_HAS_CHARGE_TARGET,
+	COND_ANTLIONGUARD_CAN_SUMMON,
+	COND_ANTLIONGUARD_CAN_CHARGE
+};
+
+enum
+{	
+	SQUAD_SLOT_ANTLIONGUARD_CHARGE = LAST_SHARED_SQUADSLOT,
+};
+
+//==================================================
+// AntlionGuard Activities
+//==================================================
+
+Activity ACT_ANTLIONGUARD_SEARCH;
+Activity ACT_ANTLIONGUARD_PEEK_FLINCH;
+Activity ACT_ANTLIONGUARD_PEEK_ENTER;
+Activity ACT_ANTLIONGUARD_PEEK_EXIT;
+Activity ACT_ANTLIONGUARD_PEEK1;
+Activity ACT_ANTLIONGUARD_BARK;
+Activity ACT_ANTLIONGUARD_PEEK_SIGHTED;
+Activity ACT_ANTLIONGUARD_SHOVE_PHYSOBJECT;
+Activity ACT_ANTLIONGUARD_FLINCH_LIGHT;
+Activity ACT_ANTLIONGUARD_UNBURROW;
+Activity ACT_ANTLIONGUARD_ROAR;
+Activity ACT_ANTLIONGUARD_RUN_HURT;
+
+// Flinches
+Activity ACT_ANTLIONGUARD_PHYSHIT_FR;
+Activity ACT_ANTLIONGUARD_PHYSHIT_FL;
+Activity ACT_ANTLIONGUARD_PHYSHIT_RR;
+Activity ACT_ANTLIONGUARD_PHYSHIT_RL;
+
+// Charge
+Activity ACT_ANTLIONGUARD_CHARGE_START;
+Activity ACT_ANTLIONGUARD_CHARGE_CANCEL;
+Activity ACT_ANTLIONGUARD_CHARGE_RUN;
+Activity ACT_ANTLIONGUARD_CHARGE_CRASH;
+Activity ACT_ANTLIONGUARD_CHARGE_STOP;
+Activity ACT_ANTLIONGUARD_CHARGE_HIT;
+Activity ACT_ANTLIONGUARD_CHARGE_ANTICIPATION;
+
+// Anim events
+int AE_ANTLIONGUARD_CHARGE_HIT;
+int AE_ANTLIONGUARD_SHOVE_PHYSOBJECT;
+int AE_ANTLIONGUARD_SHOVE;
+int AE_ANTLIONGUARD_FOOTSTEP_LIGHT;
+int AE_ANTLIONGUARD_FOOTSTEP_HEAVY;
+int AE_ANTLIONGUARD_CHARGE_EARLYOUT;
+int AE_ANTLIONGUARD_VOICE_GROWL;
+int AE_ANTLIONGUARD_VOICE_BARK;
+int AE_ANTLIONGUARD_VOICE_PAIN;
+int AE_ANTLIONGUARD_VOICE_SQUEEZE;
+int AE_ANTLIONGUARD_VOICE_SCRATCH;
+int AE_ANTLIONGUARD_VOICE_GRUNT;
+int AE_ANTLIONGUARD_VOICE_ROAR;
+int AE_ANTLIONGUARD_BURROW_OUT;
+
+struct PhysicsObjectCriteria_t
+{
+	CBaseEntity *pTarget;
+	Vector	vecCenter;		// Center point to look around
+	float	flRadius;		// Radius to search within
+	float	flTargetCone;
+	bool	bPreferObjectsAlongTargetVector;	// Prefer objects that we can strike easily as we move towards our target
+	float	flNearRadius;						// If we won't hit the player with the object, but get this close, throw anyway
+};
+
+#define MAX_FAILED_PHYSOBJECTS 8
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+class CNPC_AntlionGuard : public CAI_BlendedNPC
+{
+public:
+	DECLARE_CLASS( CNPC_AntlionGuard, CAI_BlendedNPC );
+	DECLARE_SERVERCLASS();
+	DECLARE_DATADESC();
+
+	CNPC_AntlionGuard( void );
+
+	Class_T	Classify( void ) { return CLASS_ANTLION; }
+	virtual int		GetSoundInterests( void ) { return (SOUND_WORLD|SOUND_COMBAT|SOUND_PLAYER|SOUND_DANGER); }
+	virtual bool	QueryHearSound( CSound *pSound );
+
+	const impactdamagetable_t &GetPhysicsImpactDamageTable( void );
+
+	virtual int		MeleeAttack1Conditions( float flDot, float flDist );
+	virtual int		SelectFailSchedule( int failedSchedule, int failedTask, AI_TaskFailureCode_t taskFailCode );
+
+	virtual int		TranslateSchedule( int scheduleType );
+	virtual int		OnTakeDamage_Alive( const CTakeDamageInfo &info );
+	virtual void	DeathSound( const CTakeDamageInfo &info );
+	virtual void	Event_Killed( const CTakeDamageInfo &info );
+	virtual int		SelectSchedule( void );
+
+	virtual float GetAutoAimRadius() { return 36.0f; }
+	
+	virtual void	Precache( void );
+	virtual void	Spawn( void );
+	virtual void	Activate( void );
+	virtual void	HandleAnimEvent( animevent_t *pEvent );
+	virtual void	UpdateEfficiency( bool bInPVS )	{ SetEfficiency( ( GetSleepState() != AISS_AWAKE ) ? AIE_DORMANT : AIE_NORMAL ); SetMoveEfficiency( AIME_NORMAL ); }
+	virtual void	PrescheduleThink( void );
+	virtual void	GatherConditions( void );
+	virtual void	TraceAttack( const CTakeDamageInfo &info, const Vector &vecDir, trace_t *ptr, CDmgAccumulator *pAccumulator );
+	virtual void	StartTask( const Task_t *pTask );
+	virtual void	RunTask( const Task_t *pTask );
+	virtual void	StopLoopingSounds();
+	virtual bool	HandleInteraction( int interactionType, void *data, CBaseCombatCharacter *sender );
+	
+	// Input handlers.
+	void	InputSetShoveTarget( inputdata_t &inputdata );
+	void	InputSetChargeTarget( inputdata_t &inputdata );
+	void	InputClearChargeTarget( inputdata_t &inputdata );
+	void	InputUnburrow( inputdata_t &inputdata );
+	void	InputRagdoll( inputdata_t &inputdata );
+	void	InputEnableBark( inputdata_t &inputdata );
+	void	InputDisableBark( inputdata_t &inputdata );
+	void	InputSummonedAntlionDied( inputdata_t &inputdata );
+	void	InputEnablePreferPhysicsAttack( inputdata_t &inputdata );
+	void	InputDisablePreferPhysicsAttack( inputdata_t &inputdata );
+
+	virtual bool	IsLightDamage( const CTakeDamageInfo &info );
+	virtual bool	IsHeavyDamage( const CTakeDamageInfo &info );
+	virtual bool	OverrideMoveFacing( const AILocalMoveGoal_t &move, float flInterval );
+	virtual bool	BecomeRagdollOnClient( const Vector &force );
+	virtual void UpdateOnRemove( void );
+	virtual bool		IsUnreachable( CBaseEntity* pEntity );			// Is entity is unreachable?
+
+	virtual float	MaxYawSpeed( void );
+	virtual bool	OverrideMove( float flInterval );
+	virtual bool	CanBecomeRagdoll( void );
+
+	virtual bool	ShouldProbeCollideAgainstEntity( CBaseEntity *pEntity );
+
+	virtual Activity	NPC_TranslateActivity( Activity baseAct );
+
+#if HL2_EPISODIC
+	//---------------------------------
+	// Navigation & Movement -- prevent stopping paths for the guard
+	//---------------------------------
+	class CNavigator : public CAI_ComponentWithOuter<CNPC_AntlionGuard, CAI_Navigator>
+	{
+		typedef CAI_ComponentWithOuter<CNPC_AntlionGuard, CAI_Navigator> BaseClass;
+	public:
+		CNavigator( CNPC_AntlionGuard *pOuter )
+			:	BaseClass( pOuter )
+		{
+		}
+
+		bool GetStoppingPath( CAI_WaypointList *pClippedWaypoints );
+	};
+	CAI_Navigator *	CreateNavigator()	{ return new CNavigator( this );	}
+#endif
+
+	DEFINE_CUSTOM_AI;
+
+private:
+
+	inline bool CanStandAtPoint( const Vector &vecPos, Vector *pOut );
+	bool	RememberFailedPhysicsTarget( CBaseEntity *pTarget );
+	void	GetPhysicsShoveDir( CBaseEntity *pObject, float flMass, Vector *pOut );
+	void	CreateGlow( CSprite **pSprite, const char *pAttachName );
+	void	DestroyGlows( void );
+	void	Footstep( bool bHeavy );
+	int		SelectCombatSchedule( void );
+	int		SelectUnreachableSchedule( void );
+	bool	CanSummon( bool bIgnoreTime );
+	void	SummonAntlions( void );
+					
+	void	ChargeLookAhead( void );
+	bool	EnemyIsRightInFrontOfMe( CBaseEntity **pEntity );
+	bool	HandleChargeImpact( Vector vecImpact, CBaseEntity *pEntity );
+	bool	ShouldCharge( const Vector &startPos, const Vector &endPos, bool useTime, bool bCheckForCancel );
+	bool	ShouldWatchEnemy( void );
+					
+	void	ImpactShock( const Vector &origin, float radius, float magnitude, CBaseEntity *pIgnored = NULL );
+	void	BuildScheduleTestBits( void );
+	void	Shove( void );
+	void	FoundEnemy( void );
+	void	LostEnemy( void );
+	void	UpdateHead( void );
+	void	UpdatePhysicsTarget( bool bPreferObjectsAlongTargetVector, float flRadius = ANTLIONGUARD_FARTHEST_PHYSICS_OBJECT );
+	void	MaintainPhysicsTarget( void );
+	void	ChargeDamage( CBaseEntity *pTarget );
+	void	StartSounds( void );
+	void	SetHeavyDamageAnim( const Vector &vecSource );
+	float	ChargeSteer( void );
+	CBaseEntity *FindPhysicsObjectTarget( const PhysicsObjectCriteria_t &criteria );
+	Vector	GetPhysicsHitPosition( CBaseEntity *pObject, CBaseEntity *pTarget, Vector *vecTrajectory, float *flClearDistance );
+	bool	CanStandAtShoveTarget( CBaseEntity *pShoveObject, CBaseEntity *pTarget, Vector *pOut );
+	CBaseEntity *GetNextShoveTarget( CBaseEntity *pLastEntity, AISightIter_t &iter );
+
+	int				m_nFlinchActivity;
+
+	bool			m_bStopped;
+	bool			m_bIsBurrowed;
+	bool			m_bBarkEnabled;
+	float			m_flNextSummonTime;
+	int				m_iNumLiveAntlions;
+							
+	float			m_flSearchNoiseTime;
+	float			m_flAngerNoiseTime;
+	float			m_flBreathTime;
+	float			m_flChargeTime;
+	float			m_flPhysicsCheckTime;
+	float			m_flNextHeavyFlinchTime;
+	float			m_flNextRoarTime;
+	int				m_iChargeMisses;
+	bool			m_bDecidedNotToStop;
+	bool			m_bPreferPhysicsAttack;
+
+	CNetworkVar( bool, m_bCavernBreed );	// If this guard is meant to be a cavern dweller (uses different assets)
+	CNetworkVar( bool, m_bInCavern );		// Behavioral hint telling the guard to change his behavior
+					
+	Vector			m_vecPhysicsTargetStartPos;
+	Vector			m_vecPhysicsHitPosition;
+					
+	EHANDLE			m_hShoveTarget;
+	EHANDLE			m_hChargeTarget;
+	EHANDLE			m_hChargeTargetPosition;
+	EHANDLE			m_hOldTarget;
+	EHANDLE			m_hPhysicsTarget;
+					
+	CUtlVectorFixed<EHANDLE, MAX_FAILED_PHYSOBJECTS>		m_FailedPhysicsTargets;
+
+	COutputEvent	m_OnSummon;
+
+	CSoundPatch		*m_pGrowlHighSound;
+	CSoundPatch		*m_pGrowlLowSound;
+	CSoundPatch		*m_pGrowlIdleSound;
+	CSoundPatch		*m_pBreathSound;
+	CSoundPatch		*m_pConfusedSound;
+
+	string_t		m_iszPhysicsPropClass;
+	string_t		m_strShoveTargets;
+
+	CSprite			*m_hCaveGlow[2];
+
+#if ANTLIONGUARD_BLOOD_EFFECTS
+	CNetworkVar( uint8, m_iBleedingLevel );
+
+	unsigned char GetBleedingLevel( void ) const;
+#endif
+protected:
+
+	int m_poseThrow;
+	int m_poseHead_Yaw, m_poseHead_Pitch;
+	virtual void	PopulatePoseParameters( void );
+
+
+// inline accessors
+public:	
+	inline bool IsCavernBreed( void ) const { return m_bCavernBreed; }
+	inline bool IsInCavern( void ) const { return m_bInCavern; }
+};
+
+//==================================================
+// CNPC_AntlionGuard::m_DataDesc
+//==================================================
+
+BEGIN_DATADESC( CNPC_AntlionGuard )
+
+	DEFINE_FIELD( m_nFlinchActivity,	FIELD_INTEGER ),
+	DEFINE_FIELD( m_bStopped,			FIELD_BOOLEAN ), 	
+	DEFINE_KEYFIELD( m_bIsBurrowed,		FIELD_BOOLEAN, "startburrowed" ),
+	DEFINE_KEYFIELD( m_bBarkEnabled,	FIELD_BOOLEAN, "allowbark" ),
+	DEFINE_FIELD( m_flNextSummonTime,	FIELD_TIME ),
+	DEFINE_FIELD( m_iNumLiveAntlions,	FIELD_INTEGER ),
+
+	DEFINE_FIELD( m_flSearchNoiseTime,	FIELD_TIME ), 
+	DEFINE_FIELD( m_flAngerNoiseTime,	FIELD_TIME ), 
+	DEFINE_FIELD( m_flBreathTime,		FIELD_TIME ), 
+	DEFINE_FIELD( m_flChargeTime,		FIELD_TIME ),
+
+	DEFINE_FIELD( m_hShoveTarget,				FIELD_EHANDLE ), 
+	DEFINE_FIELD( m_hChargeTarget,				FIELD_EHANDLE ), 
+	DEFINE_FIELD( m_hChargeTargetPosition,		FIELD_EHANDLE ), 
+	DEFINE_FIELD( m_hOldTarget,					FIELD_EHANDLE ),
+	// m_FailedPhysicsTargets	// We do not save/load these
+
+	DEFINE_FIELD( m_hPhysicsTarget,				FIELD_EHANDLE ),
+	DEFINE_FIELD( m_vecPhysicsTargetStartPos,	FIELD_POSITION_VECTOR ),
+	DEFINE_FIELD( m_vecPhysicsHitPosition,		FIELD_POSITION_VECTOR ),
+	DEFINE_FIELD( m_flPhysicsCheckTime,			FIELD_TIME ),
+	DEFINE_FIELD( m_flNextHeavyFlinchTime,		FIELD_TIME ),
+	DEFINE_FIELD( m_flNextRoarTime,				FIELD_TIME ),
+	DEFINE_FIELD( m_iChargeMisses,				FIELD_INTEGER ),
+	DEFINE_FIELD( m_bDecidedNotToStop,			FIELD_BOOLEAN ),
+	DEFINE_FIELD( m_bPreferPhysicsAttack,		FIELD_BOOLEAN ),
+
+#if ANTLIONGUARD_BLOOD_EFFECTS
+	DEFINE_FIELD( m_iBleedingLevel,				FIELD_CHARACTER ),
+#endif
+
+	DEFINE_KEYFIELD( m_bCavernBreed,FIELD_BOOLEAN, "cavernbreed" ),
+	DEFINE_KEYFIELD( m_bInCavern,	FIELD_BOOLEAN, "incavern" ),
+	DEFINE_KEYFIELD( m_strShoveTargets,	FIELD_STRING, "shovetargets" ),
+
+	DEFINE_AUTO_ARRAY( m_hCaveGlow, FIELD_CLASSPTR ),
+
+	DEFINE_OUTPUT( m_OnSummon,			"OnSummon" ),
+
+	DEFINE_SOUNDPATCH( m_pGrowlHighSound ),
+	DEFINE_SOUNDPATCH( m_pGrowlLowSound ),
+	DEFINE_SOUNDPATCH( m_pGrowlIdleSound ),
+	DEFINE_SOUNDPATCH( m_pBreathSound ),
+	DEFINE_SOUNDPATCH( m_pConfusedSound ),
+
+	DEFINE_INPUTFUNC( FIELD_STRING,	"SetShoveTarget", InputSetShoveTarget ),
+	DEFINE_INPUTFUNC( FIELD_STRING,	"SetChargeTarget", InputSetChargeTarget ),
+	DEFINE_INPUTFUNC( FIELD_VOID,	"ClearChargeTarget", InputClearChargeTarget ),
+	DEFINE_INPUTFUNC( FIELD_VOID,	"Unburrow", InputUnburrow ),
+	DEFINE_INPUTFUNC( FIELD_VOID,	"Ragdoll", InputRagdoll ),
+	DEFINE_INPUTFUNC( FIELD_VOID,	"EnableBark", InputEnableBark ),
+	DEFINE_INPUTFUNC( FIELD_VOID,	"DisableBark", InputDisableBark ),
+	DEFINE_INPUTFUNC( FIELD_VOID,	"SummonedAntlionDied", InputSummonedAntlionDied ),
+	DEFINE_INPUTFUNC( FIELD_VOID,	"EnablePreferPhysicsAttack", InputEnablePreferPhysicsAttack ),
+	DEFINE_INPUTFUNC( FIELD_VOID,	"DisablePreferPhysicsAttack", InputDisablePreferPhysicsAttack ),
+
+END_DATADESC()
+
+
+//Fast Growl (Growl High)
+envelopePoint_t envAntlionGuardFastGrowl[] =
+{
+	{	1.0f, 1.0f,
+		0.2f, 0.4f,
+	},
+	{	0.1f, 0.1f,
+		0.8f, 1.0f,
+	},
+	{	0.0f, 0.0f,
+		0.4f, 0.8f,
+	},
+};
+
+
+//Bark 1 (Growl High)
+envelopePoint_t envAntlionGuardBark1[] =
+{
+	{	1.0f, 1.0f,
+		0.1f, 0.2f,
+	},
+	{	0.0f, 0.0f,
+		0.4f, 0.6f,
+	},
+};
+
+//Bark 2 (Confused)
+envelopePoint_t envAntlionGuardBark2[] =
+{
+	{	1.0f, 1.0f,
+		0.1f, 0.2f,
+	},
+	{	0.2f, 0.3f,
+		0.1f, 0.2f,
+	},
+	{	0.0f, 0.0f,
+		0.4f, 0.6f,
+	},
+};
+
+//Pain
+envelopePoint_t envAntlionGuardPain1[] =
+{
+	{	1.0f, 1.0f,
+		0.1f, 0.2f,
+	},
+	{	-1.0f, -1.0f,
+		0.5f, 0.8f,
+	},
+	{	0.1f, 0.2f,
+		0.1f, 0.2f,
+	},
+	{	0.0f, 0.0f,
+		0.5f, 0.75f,
+	},
+};
+
+//Squeeze (High Growl)
+envelopePoint_t envAntlionGuardSqueeze[] =
+{
+	{	1.0f, 1.0f,
+		0.1f, 0.2f,
+	},
+	{	0.0f, 0.0f,
+		1.0f, 1.5f,
+	},
+};
+
+//Scratch (Low Growl)
+envelopePoint_t envAntlionGuardScratch[] =
+{
+	{	1.0f, 1.0f,
+		0.4f, 0.6f,
+	},
+	{	0.5f, 0.5f,
+		0.4f, 0.6f,
+	},
+	{	0.0f, 0.0f,
+		1.0f, 1.5f,
+	},
+};
+
+//Grunt
+envelopePoint_t envAntlionGuardGrunt[] =
+{
+	{	0.6f, 1.0f,
+		0.1f, 0.2f,
+	},
+	{	0.0f, 0.0f,
+		0.1f, 0.2f,
+	},
+};
+
+envelopePoint_t envAntlionGuardGrunt2[] =
+{
+	{	0.2f, 0.4f,
+		0.1f, 0.2f,
+	},
+	{	0.0f, 0.0f,
+		0.4f, 0.6f,
+	},
+};
+
+//==============================================================================================
+// ANTLION GUARD PHYSICS DAMAGE TABLE
+//==============================================================================================
+static impactentry_t antlionGuardLinearTable[] =
+{
+	{ 100*100,	10 },
+	{ 250*250,	25 },
+	{ 350*350,	50 },
+	{ 500*500,	75 },
+	{ 1000*1000,100 },
+};
+
+static impactentry_t antlionGuardAngularTable[] =
+{
+	{  50* 50, 10 },
+	{ 100*100, 25 },
+	{ 150*150, 50 },
+	{ 200*200, 75 },
+};
+
+impactdamagetable_t gAntlionGuardImpactDamageTable =
+{
+	antlionGuardLinearTable,
+	antlionGuardAngularTable,
+	
+	ARRAYSIZE(antlionGuardLinearTable),
+	ARRAYSIZE(antlionGuardAngularTable),
+
+	200*200,// minimum linear speed squared
+	180*180,// minimum angular speed squared (360 deg/s to cause spin/slice damage)
+	15,		// can't take damage from anything under 15kg
+
+	10,		// anything less than 10kg is "small"
+	5,		// never take more than 1 pt of damage from anything under 15kg
+	128*128,// <15kg objects must go faster than 36 in/s to do damage
+
+	45,		// large mass in kg 
+	2,		// large mass scale (anything over 500kg does 4X as much energy to read from damage table)
+	1,		// large mass falling scale
+	0,		// my min velocity
+};
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Output : const impactdamagetable_t
+//-----------------------------------------------------------------------------
+const impactdamagetable_t &CNPC_AntlionGuard::GetPhysicsImpactDamageTable( void )
+{
+	return gAntlionGuardImpactDamageTable;
+}
+
+//==================================================
+// CNPC_AntlionGuard
+//==================================================
+
+CNPC_AntlionGuard::CNPC_AntlionGuard( void )
+{
+	m_bCavernBreed = false;
+	m_bInCavern = false;
+
+	m_iszPhysicsPropClass = AllocPooledString( "prop_physics" );
+}
+
+LINK_ENTITY_TO_CLASS( npc_antlionguard, CNPC_AntlionGuard );
+
+IMPLEMENT_SERVERCLASS_ST(CNPC_AntlionGuard, DT_NPC_AntlionGuard)
+	SendPropBool( SENDINFO( m_bCavernBreed ) ),
+	SendPropBool( SENDINFO( m_bInCavern ) ),
+
+#if ANTLIONGUARD_BLOOD_EFFECTS
+	SendPropInt(  SENDINFO( m_iBleedingLevel ), 2, SPROP_UNSIGNED ),
+#endif
+END_SEND_TABLE()
+
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::UpdateOnRemove( void )
+{
+	DestroyGlows();
+
+	// Chain to the base class
+	BaseClass::UpdateOnRemove();
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::Precache( void )
+{
+	PrecacheModel( ANTLIONGUARD_MODEL );
+
+	PrecacheScriptSound( "NPC_AntlionGuard.Shove" );
+	PrecacheScriptSound( "NPC_AntlionGuard.HitHard" );
+
+	if ( HasSpawnFlags(SF_ANTLIONGUARD_INSIDE_FOOTSTEPS) )
+	{
+		PrecacheScriptSound( "NPC_AntlionGuard.Inside.StepLight" );
+		PrecacheScriptSound( "NPC_AntlionGuard.Inside.StepHeavy" );
+	}
+	else
+	{
+		PrecacheScriptSound( "NPC_AntlionGuard.StepLight" );
+		PrecacheScriptSound( "NPC_AntlionGuard.StepHeavy" );
+	}
+
+#if HL2_EPISODIC
+	PrecacheScriptSound( "NPC_AntlionGuard.NearStepLight" );
+	PrecacheScriptSound( "NPC_AntlionGuard.NearStepHeavy" );
+	PrecacheScriptSound( "NPC_AntlionGuard.FarStepLight" );
+	PrecacheScriptSound( "NPC_AntlionGuard.FarStepHeavy" );
+	PrecacheScriptSound( "NPC_AntlionGuard.BreatheLoop" );
+	PrecacheScriptSound( "NPC_AntlionGuard.ShellCrack" );
+	PrecacheScriptSound( "NPC_AntlionGuard.Pain_Roar" );
+	PrecacheModel( "sprites/grubflare1.vmt" );
+#endif // HL2_EPISODIC
+
+	PrecacheScriptSound( "NPC_AntlionGuard.Anger" );
+	PrecacheScriptSound( "NPC_AntlionGuard.Roar" );
+	PrecacheScriptSound( "NPC_AntlionGuard.Die" );
+
+	PrecacheScriptSound( "NPC_AntlionGuard.GrowlHigh" );
+	PrecacheScriptSound( "NPC_AntlionGuard.GrowlIdle" );
+	PrecacheScriptSound( "NPC_AntlionGuard.BreathSound" );
+	PrecacheScriptSound( "NPC_AntlionGuard.Confused" );
+	PrecacheScriptSound( "NPC_AntlionGuard.Fallover" );
+
+	PrecacheScriptSound( "NPC_AntlionGuard.FrustratedRoar" );
+
+	PrecacheParticleSystem( "blood_antlionguard_injured_light" );
+	PrecacheParticleSystem( "blood_antlionguard_injured_heavy" );
+
+	BaseClass::Precache();
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::DestroyGlows( void )
+{
+	if ( m_hCaveGlow[0] )
+	{
+		UTIL_Remove( m_hCaveGlow[0] );
+
+		// reset it to NULL in case there is a double death cleanup for some reason.
+		m_hCaveGlow[0] = NULL;
+	}
+
+	if ( m_hCaveGlow[1] )
+	{
+		UTIL_Remove( m_hCaveGlow[1] );
+
+		// reset it to NULL in case there is a double death cleanup for some reason.
+		m_hCaveGlow[1] = NULL;
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::CreateGlow( CSprite **pSprite, const char *pAttachName )
+{
+	if ( pSprite == NULL )
+		return;
+
+	// Create the glow sprite
+	*pSprite = CSprite::SpriteCreate( "sprites/grubflare1.vmt", GetLocalOrigin(), false );
+	Assert( *pSprite );
+	if ( *pSprite == NULL )
+		return;
+
+	(*pSprite)->TurnOn();
+	(*pSprite)->SetTransparency( kRenderWorldGlow, 156, 169, 121, 164, kRenderFxNoDissipation );
+	(*pSprite)->SetScale( 1.0f );
+	(*pSprite)->SetGlowProxySize( 16.0f );
+	int nAttachment = LookupAttachment( pAttachName );
+	(*pSprite)->SetParent( this, nAttachment );
+	(*pSprite)->SetLocalOrigin( vec3_origin );
+
+	// Don't uselessly animate, we're a static sprite!
+	(*pSprite)->SetThink( NULL );
+	(*pSprite)->SetNextThink( TICK_NEVER_THINK );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::Spawn( void )
+{
+	Precache();
+
+	SetModel( ANTLIONGUARD_MODEL );
+
+	// Switch our skin (for now), if we're the cavern guard
+	if ( m_bCavernBreed )
+	{
+		m_nSkin = 1;
+		
+		// Add glows
+		CreateGlow( &(m_hCaveGlow[0]), "attach_glow1" );
+		CreateGlow( &(m_hCaveGlow[1]), "attach_glow2" );
+	}
+	else
+	{
+		m_hCaveGlow[0] = NULL;
+		m_hCaveGlow[1] = NULL;
+	}
+
+	SetHullType( HULL_LARGE );
+	SetHullSizeNormal();
+	SetDefaultEyeOffset();
+	
+	SetSolid( SOLID_BBOX );
+	AddSolidFlags( FSOLID_NOT_STANDABLE );
+	SetMoveType( MOVETYPE_STEP );
+
+	SetNavType( NAV_GROUND );
+	SetBloodColor( BLOOD_COLOR_YELLOW );
+
+	m_iHealth = sk_antlionguard_health.GetFloat();
+	m_iMaxHealth = m_iHealth;
+	m_flFieldOfView	= ANTLIONGUARD_FOV_NORMAL;
+	
+	m_flPhysicsCheckTime = 0;
+	m_flChargeTime = 0;
+	m_flNextRoarTime = 0;
+	m_flNextSummonTime = 0;
+	m_iNumLiveAntlions = 0;
+	m_iChargeMisses = 0;
+	m_flNextHeavyFlinchTime = 0;
+	m_bDecidedNotToStop = false;
+
+	ClearHintGroup();
+	
+	m_bStopped = false;
+
+	m_hShoveTarget = NULL;
+	m_hChargeTarget = NULL;
+	m_hChargeTargetPosition = NULL;
+	m_hPhysicsTarget = NULL;
+	
+	m_HackedGunPos.x		= 10;
+	m_HackedGunPos.y		= 0;
+	m_HackedGunPos.z		= 30;
+
+	CapabilitiesClear();
+	CapabilitiesAdd( bits_CAP_MOVE_GROUND | bits_CAP_INNATE_MELEE_ATTACK1 | bits_CAP_SQUAD );
+	CapabilitiesAdd( bits_CAP_SKIP_NAV_GROUND_CHECK );
+
+	NPCInit();
+
+	BaseClass::Spawn();
+
+	//See if we're supposed to start burrowed
+	if ( m_bIsBurrowed )
+	{
+		AddEffects( EF_NODRAW );
+		AddFlag( FL_NOTARGET );
+
+		m_spawnflags |= SF_NPC_GAG;
+		
+		AddSolidFlags( FSOLID_NOT_SOLID );
+		
+		m_takedamage = DAMAGE_NO;
+
+		if ( m_hCaveGlow[0] )
+			m_hCaveGlow[0]->TurnOff();
+		
+		if ( m_hCaveGlow[1] )
+			m_hCaveGlow[1]->TurnOff();
+	}
+
+	// Do not dissolve
+	AddEFlags( EFL_NO_DISSOLVE );
+
+	// We get a minute of free knowledge about the target
+	GetEnemies()->SetEnemyDiscardTime( 120.0f );
+	GetEnemies()->SetFreeKnowledgeDuration( 60.0f );
+
+	// We need to bloat the absbox to encompass all the hitboxes
+	Vector absMin = -Vector(100,100,0);
+	Vector absMax = Vector(100,100,128);
+
+	CollisionProp()->SetSurroundingBoundsType( USE_SPECIFIED_BOUNDS, &absMin, &absMax );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::Activate( void )
+{
+	BaseClass::Activate();
+
+	// Find all nearby physics objects and add them to the list of objects we will sense
+	CBaseEntity *pObject = NULL;
+	while ( ( pObject = gEntList.FindEntityInSphere( pObject, WorldSpaceCenter(), 2500 ) ) != NULL )
+	{
+		// Can't throw around debris
+		if ( pObject->GetCollisionGroup() == COLLISION_GROUP_DEBRIS )
+			continue;
+
+		// We can only throw a few types of things
+		if ( !FClassnameIs( pObject, "prop_physics" ) && !FClassnameIs( pObject, "func_physbox" ) )
+			continue;
+
+		// Ensure it's mass is within range
+		IPhysicsObject *pPhysObj = pObject->VPhysicsGetObject();
+		if( ( pPhysObj == NULL ) || ( pPhysObj->GetMass() > ANTLIONGUARD_MAX_OBJECT_MASS ) || ( pPhysObj->GetMass() < ANTLIONGUARD_MIN_OBJECT_MASS ) )
+			continue;
+
+		// Tell the AI sensing list that we want to consider this
+		g_AI_SensedObjectsManager.AddEntity( pObject );
+
+		if ( g_debug_antlionguard.GetInt() == 5 )
+		{
+			Msg("Antlion Guard: Added prop with model '%s' to sense list.\n", STRING(pObject->GetModelName()) );
+			pObject->m_debugOverlays |= OVERLAY_BBOX_BIT;
+		}
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Return true if the guard's allowed to summon antlions
+//-----------------------------------------------------------------------------
+bool CNPC_AntlionGuard::CanSummon( bool bIgnoreTime )
+{
+	if ( !m_bBarkEnabled )
+		return false;
+
+	if ( !bIgnoreTime && m_flNextSummonTime > gpGlobals->curtime )
+		return false;
+
+	// Hit the max number of them allowed? Only summon when we're 2 down.
+	if ( m_iNumLiveAntlions >= MAX(1, ANTLIONGUARD_SUMMON_COUNT-1) )
+		return false;
+
+	return true;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Our enemy is unreachable. Select a schedule.
+//-----------------------------------------------------------------------------
+int CNPC_AntlionGuard::SelectUnreachableSchedule( void )
+{
+	// If we're in the cavern setting, we opt out of this
+	if ( m_bInCavern )
+		return SCHED_ANTLIONGUARD_CHASE_ENEMY_TOLERANCE;
+	// Summon antlions if we can
+	if ( HasCondition( COND_ANTLIONGUARD_CAN_SUMMON ) )
+		return SCHED_ANTLIONGUARD_SUMMON;
+
+	// First, look for objects near ourselves
+	PhysicsObjectCriteria_t	criteria;
+	criteria.bPreferObjectsAlongTargetVector = false;
+	criteria.flNearRadius = (40*12);
+	criteria.flRadius = (250*12);
+	criteria.flTargetCone = -1.0f;
+	criteria.pTarget = GetEnemy();
+	criteria.vecCenter = GetAbsOrigin();
+
+	CBaseEntity *pTarget = FindPhysicsObjectTarget( criteria );
+	if ( pTarget == NULL && GetEnemy() )
+	{
+		// Use the same criteria, but search near the target instead of us
+		criteria.vecCenter = GetEnemy()->GetAbsOrigin();
+		pTarget = FindPhysicsObjectTarget( criteria );
+	}
+
+	// If we found one, we'll want to attack it
+	if ( pTarget )
+	{
+		m_hPhysicsTarget = pTarget;
+		SetCondition( COND_ANTLIONGUARD_PHYSICS_TARGET );
+		m_vecPhysicsTargetStartPos = m_hPhysicsTarget->WorldSpaceCenter();
+		
+		// Tell any squadmates I'm going for this item so they don't as well
+		if ( GetSquad() != NULL )
+		{
+			GetSquad()->BroadcastInteraction( g_interactionAntlionGuardFoundPhysicsObject, (void *)((CBaseEntity *)m_hPhysicsTarget), this );
+		}
+
+		return SCHED_ANTLIONGUARD_PHYSICS_ATTACK;
+	}
+
+	// Deal with a visible player
+	if ( HasCondition( COND_SEE_ENEMY ) )
+	{
+		// Roar at the player as show of frustration
+		if ( m_flNextRoarTime < gpGlobals->curtime )
+		{
+			m_flNextRoarTime = gpGlobals->curtime + RandomFloat( 20,40 );
+			return SCHED_ANTLIONGUARD_ROAR;
+		}
+
+		// If we're under attack, then let's leave for a bit
+		if ( GetEnemy() && HasCondition( COND_HEAVY_DAMAGE ) )
+		{
+			Vector dir = GetEnemy()->GetAbsOrigin() - GetAbsOrigin();
+			VectorNormalize(dir);
+
+			GetMotor()->SetIdealYaw( -dir );
+			
+			return SCHED_ANTLIONGUARD_TAKE_COVER_FROM_ENEMY;
+		}
+	}
+
+	// If we're too far away, try to close distance to our target first
+	float flDistToEnemySqr = ( GetEnemy()->GetAbsOrigin() - GetAbsOrigin() ).LengthSqr();
+	if ( flDistToEnemySqr > Square( 100*12 ) )
+		return SCHED_ANTLIONGUARD_CHASE_ENEMY_TOLERANCE;
+
+	// Fire that we're unable to reach our target!
+	if ( GetEnemy() && GetEnemy()->IsPlayer() )
+	{
+		m_OnLostPlayer.FireOutput( this, this );
+	}
+
+	m_OnLostEnemy.FireOutput( this, this );
+	GetEnemies()->MarkAsEluded( GetEnemy() );
+
+	// Move randomly for the moment
+	return SCHED_ANTLIONGUARD_CANT_ATTACK;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+int CNPC_AntlionGuard::SelectCombatSchedule( void )
+{
+	ClearHintGroup();
+
+	/*
+	bool bCanCharge = false;
+	if ( HasCondition( COND_SEE_ENEMY ) )
+	{
+		bCanCharge = ShouldCharge( GetAbsOrigin(), GetEnemy()->GetAbsOrigin(), true, false );
+	}
+	*/
+
+	// Attack if we can
+	if ( HasCondition(COND_CAN_MELEE_ATTACK1) )
+		return SCHED_MELEE_ATTACK1;
+
+	// Otherwise, summon antlions
+	if ( HasCondition(COND_ANTLIONGUARD_CAN_SUMMON) )
+	{
+		// If I can charge, and have antlions, charge instead
+		if ( HasCondition( COND_ANTLIONGUARD_CAN_CHARGE ) && m_iNumLiveAntlions )
+			return SCHED_ANTLIONGUARD_CHARGE;
+
+		return SCHED_ANTLIONGUARD_SUMMON;
+	}
+
+	// See if we can bark
+	if ( HasCondition( COND_ENEMY_UNREACHABLE ) )
+		return SelectUnreachableSchedule();
+
+	//Physics target
+	if ( HasCondition( COND_ANTLIONGUARD_PHYSICS_TARGET ) && !m_bInCavern )
+		return SCHED_ANTLIONGUARD_PHYSICS_ATTACK;
+
+	// If we've missed a couple of times, and we can summon, make it harder
+	if ( m_iChargeMisses >= 2 && CanSummon(true) )
+	{
+		m_iChargeMisses--;
+		return SCHED_ANTLIONGUARD_SUMMON;
+	}
+
+	// Charging
+	if ( HasCondition( COND_ANTLIONGUARD_CAN_CHARGE ) )
+	{
+		// Don't let other squad members charge while we're doing it
+		OccupyStrategySlot( SQUAD_SLOT_ANTLIONGUARD_CHARGE );
+		return SCHED_ANTLIONGUARD_CHARGE;
+	}
+
+	return BaseClass::SelectSchedule();
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+bool CNPC_AntlionGuard::ShouldCharge( const Vector &startPos, const Vector &endPos, bool useTime, bool bCheckForCancel )
+{
+	// Don't charge in tight spaces unless forced to
+	if ( hl2_episodic.GetBool() && m_bInCavern && !(m_hChargeTarget.Get() && m_hChargeTarget->IsAlive()) )
+		return false;
+
+	// Must have a target
+	if ( !GetEnemy() )
+		return false;
+
+	// No one else in the squad can be charging already
+	if ( IsStrategySlotRangeOccupied( SQUAD_SLOT_ANTLIONGUARD_CHARGE, SQUAD_SLOT_ANTLIONGUARD_CHARGE ) )
+		return false;
+
+	// Don't check the distance once we start charging
+	if ( !bCheckForCancel )
+	{
+		// Don't allow use to charge again if it's been too soon
+		if ( useTime && ( m_flChargeTime > gpGlobals->curtime ) )
+			return false;
+
+		float distance = UTIL_DistApprox2D( startPos, endPos );
+
+		// Must be within our tolerance range
+		if ( ( distance < ANTLIONGUARD_CHARGE_MIN ) || ( distance > ANTLIONGUARD_CHARGE_MAX ) )
+			return false;
+	}
+
+	if ( GetSquad() )
+	{
+		// If someone in our squad is closer to the enemy, then don't charge (we end up hitting them more often than not!)
+		float flOurDistToEnemySqr = ( GetAbsOrigin() - GetEnemy()->GetAbsOrigin() ).LengthSqr();
+		AISquadIter_t iter;
+		for ( CAI_BaseNPC *pSquadMember = GetSquad()->GetFirstMember( &iter ); pSquadMember; pSquadMember = GetSquad()->GetNextMember( &iter ) )
+		{
+			if ( pSquadMember->IsAlive() == false || pSquadMember == this )
+				continue;
+
+			if ( ( pSquadMember->GetAbsOrigin() - GetEnemy()->GetAbsOrigin() ).LengthSqr() < flOurDistToEnemySqr )
+				return false;
+		}
+	}
+
+	//FIXME: We'd like to exclude small physics objects from this check!
+
+	// We only need to hit the endpos with the edge of our bounding box
+	Vector vecDir = endPos - startPos;
+	VectorNormalize( vecDir );
+	float flWidth = WorldAlignSize().x * 0.5;
+	Vector vecTargetPos = endPos - (vecDir * flWidth);
+
+	// See if we can directly move there
+	AIMoveTrace_t moveTrace;
+	GetMoveProbe()->MoveLimit( NAV_GROUND, startPos, vecTargetPos, MASK_NPCSOLID_BRUSHONLY, GetEnemy(), &moveTrace );
+	
+	// Draw the probe
+	if ( g_debug_antlionguard.GetInt() == 1 )
+	{
+		Vector	enemyDir	= (vecTargetPos - startPos);
+		float	enemyDist	= VectorNormalize( enemyDir );
+
+		NDebugOverlay::BoxDirection( startPos, GetHullMins(), GetHullMaxs() + Vector(enemyDist,0,0), enemyDir, 0, 255, 0, 8, 1.0f );
+	}
+
+	// If we're not blocked, charge
+	if ( IsMoveBlocked( moveTrace ) )
+	{
+		// Don't allow it if it's too close to us
+		if ( UTIL_DistApprox( WorldSpaceCenter(), moveTrace.vEndPosition ) < ANTLIONGUARD_CHARGE_MIN )
+			return false;
+
+		// Allow some special cases to not block us
+		if ( moveTrace.pObstruction != NULL )
+		{
+			// If we've hit the world, see if it's a cliff
+			if ( moveTrace.pObstruction == GetContainingEntity( INDEXENT(0) ) )
+			{	
+				// Can't be too far above/below the target
+				if ( fabs( moveTrace.vEndPosition.z - vecTargetPos.z ) > StepHeight() )
+					return false;
+
+				// Allow it if we got pretty close
+				if ( UTIL_DistApprox( moveTrace.vEndPosition, vecTargetPos ) < 64 )
+					return true;
+			}
+
+			// Hit things that will take damage
+			if ( moveTrace.pObstruction->m_takedamage != DAMAGE_NO )
+				return true;
+
+			// Hit things that will move
+			if ( moveTrace.pObstruction->GetMoveType() == MOVETYPE_VPHYSICS )
+				return true;
+		}
+
+		return false;
+	}
+
+	// Only update this if we've requested it
+	if ( useTime )
+	{
+		m_flChargeTime = gpGlobals->curtime + 4.0f;
+	}
+
+	return true;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+int CNPC_AntlionGuard::SelectSchedule( void )
+{
+	// Don't do anything if we're burrowed
+	if ( m_bIsBurrowed )
+		return SCHED_IDLE_STAND;
+
+#if 0
+	// Debug physics object finding
+	if ( 0 ) //g_debug_antlionguard.GetInt() == 3 )
+	{
+		m_flPhysicsCheckTime = 0;
+		UpdatePhysicsTarget( false );
+		return SCHED_IDLE_STAND;
+	}
+#endif
+
+	// Flinch on heavy damage, but not if we've flinched too recently.
+	// This is done to prevent stun-locks from grenades.
+	if ( !m_bInCavern && HasCondition( COND_HEAVY_DAMAGE ) && m_flNextHeavyFlinchTime < gpGlobals->curtime )
+	{
+		m_flNextHeavyFlinchTime = gpGlobals->curtime + 8.0f;
+		return SCHED_ANTLIONGUARD_PHYSICS_DAMAGE_HEAVY;
+	}
+
+	// Prefer to use physics, in this case
+	if ( m_bPreferPhysicsAttack )
+	{
+		// If we have a target, try to go for it
+		if ( HasCondition( COND_ANTLIONGUARD_PHYSICS_TARGET ) )
+			return SCHED_ANTLIONGUARD_PHYSICS_ATTACK;
+	}
+
+	// Charge after a target if it's set
+	if ( m_hChargeTarget && m_hChargeTargetPosition )
+	{
+		ClearCondition( COND_ANTLIONGUARD_HAS_CHARGE_TARGET );
+		ClearHintGroup();
+		
+		if ( m_hChargeTarget->IsAlive() == false )
+		{
+			m_hChargeTarget	= NULL;
+			m_hChargeTargetPosition = NULL;
+			SetEnemy( m_hOldTarget );
+
+			if ( m_hOldTarget == NULL )
+			{
+				m_NPCState = NPC_STATE_ALERT;
+			}
+		}
+		else
+		{
+			m_hOldTarget = GetEnemy();
+			SetEnemy( m_hChargeTarget );
+			UpdateEnemyMemory( m_hChargeTarget, m_hChargeTarget->GetAbsOrigin() );
+
+			//If we can't see the target, run to somewhere we can
+			if ( ShouldCharge( GetAbsOrigin(), GetEnemy()->GetAbsOrigin(), false, false ) == false )
+				return SCHED_ANTLIONGUARD_FIND_CHARGE_POSITION;
+
+			return SCHED_ANTLIONGUARD_CHARGE_TARGET;
+		}
+	}
+
+	// See if we need to clear a path to our enemy
+	if ( HasCondition( COND_ENEMY_OCCLUDED ) || HasCondition( COND_ENEMY_UNREACHABLE ) )
+	{
+		CBaseEntity *pBlocker = GetEnemyOccluder();
+
+		if ( ( pBlocker != NULL ) && FClassnameIs( pBlocker, "prop_physics" ) && !m_bInCavern )
+		{
+			m_hPhysicsTarget = pBlocker;
+			return SCHED_ANTLIONGUARD_PHYSICS_ATTACK;
+		}
+	}
+
+	//Only do these in combat states
+	if ( m_NPCState == NPC_STATE_COMBAT && GetEnemy() )
+		return SelectCombatSchedule();
+
+	return BaseClass::SelectSchedule();
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+int CNPC_AntlionGuard::MeleeAttack1Conditions( float flDot, float flDist )
+{
+	// Don't attack again too soon
+	if ( GetNextAttack() > gpGlobals->curtime )
+		return 0;
+
+	// While charging, we can't melee attack
+	if ( IsCurSchedule( SCHED_ANTLIONGUARD_CHARGE ) )
+		return 0;
+
+	if ( hl2_episodic.GetBool() && m_bInCavern )
+	{
+		// Predict where they'll be and see if THAT is within range
+		Vector vecPredPos;
+		UTIL_PredictedPosition( GetEnemy(), 0.25f, &vecPredPos );
+		if ( ( GetAbsOrigin() - vecPredPos ).Length() > ANTLIONGUARD_MELEE1_RANGE )
+			return COND_TOO_FAR_TO_ATTACK;
+	}
+	else
+	{
+		// Must be close enough
+		if ( flDist > ANTLIONGUARD_MELEE1_RANGE )
+			return COND_TOO_FAR_TO_ATTACK;
+	}
+
+	// Must be within a viable cone
+	if ( flDot < ANTLIONGUARD_MELEE1_CONE )
+		return COND_NOT_FACING_ATTACK;
+
+	// If the enemy is on top of me, I'm allowed to hit the sucker
+	if ( GetEnemy()->GetGroundEntity() == this )
+		return COND_CAN_MELEE_ATTACK1;
+
+	trace_t	tr;
+	TraceHull_SkipPhysics( WorldSpaceCenter(), GetEnemy()->WorldSpaceCenter(), Vector(-10,-10,-10), Vector(10,10,10), MASK_SHOT_HULL, this, COLLISION_GROUP_NONE, &tr, VPhysicsGetObject()->GetMass() * 0.5 );
+
+	// If we hit anything, go for it
+	if ( tr.fraction < 1.0f )
+		return COND_CAN_MELEE_ATTACK1;
+
+	return 0;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+float CNPC_AntlionGuard::MaxYawSpeed( void )
+{
+	Activity eActivity = GetActivity();
+
+	// Stay still
+	if (( eActivity == ACT_ANTLIONGUARD_SEARCH ) || 
+		( eActivity == ACT_ANTLIONGUARD_PEEK_ENTER ) || 
+		( eActivity == ACT_ANTLIONGUARD_PEEK_EXIT ) || 
+		( eActivity == ACT_ANTLIONGUARD_PEEK1 ) || 
+		( eActivity == ACT_ANTLIONGUARD_BARK ) || 
+		( eActivity == ACT_ANTLIONGUARD_PEEK_SIGHTED ) || 
+		( eActivity == ACT_MELEE_ATTACK1 ) )
+		return 0.0f;
+
+	CBaseEntity *pEnemy = GetEnemy();
+
+	if ( pEnemy != NULL && pEnemy->IsPlayer() == false )
+		return 16.0f;
+
+	// Turn slowly when you're charging
+	if ( eActivity == ACT_ANTLIONGUARD_CHARGE_START )
+		return 4.0f;
+
+	if ( hl2_episodic.GetBool() && m_bInCavern )
+	{
+		// Allow a better turning rate when moving quickly but not charging the player
+		if ( ( eActivity == ACT_ANTLIONGUARD_CHARGE_RUN ) && IsCurSchedule( SCHED_ANTLIONGUARD_CHARGE ) == false )
+			return 16.0f;
+	}
+
+	// Turn more slowly as we close in on our target
+	if ( eActivity == ACT_ANTLIONGUARD_CHARGE_RUN )
+	{
+		if ( pEnemy == NULL )
+			return 2.0f;
+
+		float dist = UTIL_DistApprox2D( GetEnemy()->WorldSpaceCenter(), WorldSpaceCenter() );
+
+		if ( dist > 512 )
+			return 16.0f;
+
+		//FIXME: Alter by skill level
+		float yawSpeed = RemapVal( dist, 0, 512, 1.0f, 2.0f );
+		yawSpeed = clamp( yawSpeed, 1.0f, 2.0f );
+
+		return yawSpeed;
+	}
+
+	if ( eActivity == ACT_ANTLIONGUARD_CHARGE_STOP )
+		return 8.0f;
+
+	switch( eActivity )
+	{
+	case ACT_TURN_LEFT:
+	case ACT_TURN_RIGHT:
+		return 40.0f;
+		break;
+	
+	case ACT_RUN:
+	default:
+		return 20.0f;
+		break;
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : flInterval - 
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+bool CNPC_AntlionGuard::OverrideMove( float flInterval )
+{
+	// If the guard's charging, we're handling the movement
+	if ( IsCurSchedule( SCHED_ANTLIONGUARD_CHARGE ) )
+		return true;
+
+	// TODO: This code increases the guard's ability to successfully hit a target, but adds a new dimension of navigation
+	//		 trouble to do with him not being able to "close the distance" between himself and the object he wants to hit.
+	//		 Fixing this will require some thought on how he picks the correct distances to his targets and when he's "close enough". -- jdw
+
+	/*
+	if ( m_hPhysicsTarget != NULL )
+	{
+		float flWidth = m_hPhysicsTarget->CollisionProp()->BoundingRadius2D();
+		GetLocalNavigator()->AddObstacle( m_hPhysicsTarget->WorldSpaceCenter(), flWidth * 0.75f, AIMST_AVOID_OBJECT );
+		//NDebugOverlay::Sphere( m_hPhysicsTarget->WorldSpaceCenter(), vec3_angle, flWidth, 255, 255, 255, 0, true, 0.5f );
+	}
+	*/
+
+	return BaseClass::OverrideMove( flInterval );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::Shove( void )
+{
+	if ( GetNextAttack() > gpGlobals->curtime )
+		return;
+
+	CBaseEntity *pHurt = NULL;
+	CBaseEntity *pTarget;
+
+	pTarget = ( m_hShoveTarget == NULL ) ? GetEnemy() : m_hShoveTarget.Get();
+
+	if ( pTarget == NULL )
+	{
+		m_hShoveTarget = NULL;
+		return;
+	}
+
+	//Always damage bullseyes if we're scripted to hit them
+	if ( pTarget->Classify() == CLASS_BULLSEYE )
+	{
+		pTarget->TakeDamage( CTakeDamageInfo( this, this, 1.0f, DMG_CRUSH ) );
+		m_hShoveTarget = NULL;
+		return;
+	}
+
+	float damage = ( pTarget->IsPlayer() ) ? sk_antlionguard_dmg_shove.GetFloat() : 250;
+
+	// If the target's still inside the shove cone, ensure we hit him	
+	Vector vecForward, vecEnd;
+	AngleVectors( GetAbsAngles(), &vecForward );
+  	float flDistSqr = ( pTarget->WorldSpaceCenter() - WorldSpaceCenter() ).LengthSqr();
+  	Vector2D v2LOS = ( pTarget->WorldSpaceCenter() - WorldSpaceCenter() ).AsVector2D();
+  	Vector2DNormalize(v2LOS);
+  	float flDot	= DotProduct2D (v2LOS, vecForward.AsVector2D() );
+	if ( flDistSqr < (ANTLIONGUARD_MELEE1_RANGE*ANTLIONGUARD_MELEE1_RANGE) && flDot >= ANTLIONGUARD_MELEE1_CONE )
+	{
+		vecEnd = pTarget->WorldSpaceCenter();
+	}
+	else
+	{
+		vecEnd = WorldSpaceCenter() + ( BodyDirection3D() * ANTLIONGUARD_MELEE1_RANGE );
+	}
+
+	// Use the melee trace to ensure we hit everything there
+	trace_t tr;
+	CTakeDamageInfo	dmgInfo( this, this, damage, DMG_SLASH );
+	CTraceFilterMelee traceFilter( this, COLLISION_GROUP_NONE, &dmgInfo, 1.0, true );
+	Ray_t ray;
+	ray.Init( WorldSpaceCenter(), vecEnd, Vector(-16,-16,-16), Vector(16,16,16) );
+	enginetrace->TraceRay( ray, MASK_SHOT_HULL, &traceFilter, &tr );
+	pHurt = tr.m_pEnt;
+
+	// Knock things around
+	ImpactShock( tr.endpos, 100.0f, 250.0f );
+
+	if ( pHurt )
+	{
+		Vector	traceDir = ( tr.endpos - tr.startpos );
+		VectorNormalize( traceDir );
+
+		// Generate enough force to make a 75kg guy move away at 600 in/sec
+		Vector vecForce = traceDir * ImpulseScale( 75, 600 );
+		CTakeDamageInfo info( this, this, vecForce, tr.endpos, damage, DMG_CLUB );
+		pHurt->TakeDamage( info );
+
+		m_hShoveTarget = NULL;
+
+		EmitSound( "NPC_AntlionGuard.Shove" );
+
+		// If the player, throw him around
+		if ( pHurt->IsPlayer() )
+		{
+			//Punch the view
+			pHurt->ViewPunch( QAngle(20,0,-20) );
+			
+			//Shake the screen
+			UTIL_ScreenShake( pHurt->GetAbsOrigin(), 100.0, 1.5, 1.0, 2, SHAKE_START );
+
+			//Red damage indicator
+			color32 red = {128,0,0,128};
+			UTIL_ScreenFade( pHurt, red, 1.0f, 0.1f, FFADE_IN );
+
+			Vector forward, up;
+			AngleVectors( GetLocalAngles(), &forward, NULL, &up );
+			pHurt->ApplyAbsVelocityImpulse( forward * 400 + up * 150 );
+
+			// in the episodes, the cavern guard poisons the player
+#if HL2_EPISODIC
+			// If I am a cavern guard attacking the player, and he still lives, then poison him too.
+			if ( m_bInCavern && pHurt->IsPlayer() && pHurt->IsAlive() && pHurt->m_iHealth > ANTLIONGUARD_POISON_TO)
+			{
+				// That didn't finish them. Take them down to one point with poison damage. It'll heal.
+				pHurt->TakeDamage( CTakeDamageInfo( this, this, pHurt->m_iHealth - ANTLIONGUARD_POISON_TO, DMG_POISON ) );
+			}
+#endif
+
+		}	
+		else
+		{
+			CBaseCombatCharacter *pVictim = ToBaseCombatCharacter( pHurt );
+			
+			if ( pVictim )
+			{
+				if ( NPC_Rollermine_IsRollermine( pVictim ) )
+				{
+					Pickup_OnPhysGunDrop( pVictim, NULL, LAUNCHED_BY_CANNON );
+				}
+
+				// FIXME: This causes NPCs that are not physically motivated to hop into the air strangely -- jdw
+				// pVictim->ApplyAbsVelocityImpulse( BodyDirection2D() * 400 + Vector( 0, 0, 250 ) );
+			}
+
+			m_hShoveTarget = NULL;
+		}
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+class CTraceFilterCharge : public CTraceFilterEntitiesOnly
+{
+public:
+	// It does have a base, but we'll never network anything below here..
+	DECLARE_CLASS_NOBASE( CTraceFilterCharge );
+	
+	CTraceFilterCharge( const IHandleEntity *passentity, int collisionGroup, CNPC_AntlionGuard *pAttacker )
+		: m_pPassEnt(passentity), m_collisionGroup(collisionGroup), m_pAttacker(pAttacker)
+	{
+	}
+	
+	virtual bool ShouldHitEntity( IHandleEntity *pHandleEntity, int contentsMask )
+	{
+		if ( !StandardFilterRules( pHandleEntity, contentsMask ) )
+			return false;
+
+		if ( !PassServerEntityFilter( pHandleEntity, m_pPassEnt ) )
+			return false;
+
+		// Don't test if the game code tells us we should ignore this collision...
+		CBaseEntity *pEntity = EntityFromEntityHandle( pHandleEntity );
+		
+		if ( pEntity )
+		{
+			if ( !pEntity->ShouldCollide( m_collisionGroup, contentsMask ) )
+				return false;
+			
+			if ( !g_pGameRules->ShouldCollide( m_collisionGroup, pEntity->GetCollisionGroup() ) )
+				return false;
+
+			if ( pEntity->m_takedamage == DAMAGE_NO )
+				return false;
+
+			// Translate the vehicle into its driver for damage
+			if ( pEntity->GetServerVehicle() != NULL )
+			{
+				CBaseEntity *pDriver = pEntity->GetServerVehicle()->GetPassenger();
+
+				if ( pDriver != NULL )
+				{
+					pEntity = pDriver;
+				}
+			}
+	
+			Vector	attackDir = pEntity->WorldSpaceCenter() - m_pAttacker->WorldSpaceCenter();
+			VectorNormalize( attackDir );
+
+			float	flDamage = ( pEntity->IsPlayer() ) ? sk_antlionguard_dmg_shove.GetFloat() : 250;;
+
+			CTakeDamageInfo info( m_pAttacker, m_pAttacker, flDamage, DMG_CRUSH );
+			CalculateMeleeDamageForce( &info, attackDir, info.GetAttacker()->WorldSpaceCenter(), 4.0f );
+
+			CBaseCombatCharacter *pVictimBCC = pEntity->MyCombatCharacterPointer();
+
+			// Only do these comparisons between NPCs
+			if ( pVictimBCC )
+			{
+				// Can only damage other NPCs that we hate
+				if ( m_pAttacker->IRelationType( pEntity ) == D_HT )
+				{
+					pEntity->TakeDamage( info );
+					return true;
+				}
+			}
+			else
+			{
+				// Otherwise just damage passive objects in our way
+				pEntity->TakeDamage( info );
+				Pickup_ForcePlayerToDropThisObject( pEntity );
+			}
+		}
+
+		return false;
+	}
+
+public:
+	const IHandleEntity *m_pPassEnt;
+	int					m_collisionGroup;
+	CNPC_AntlionGuard	*m_pAttacker;
+};
+
+#define	MIN_FOOTSTEP_NEAR_DIST	Square( 80*12.0f )// ft
+
+//-----------------------------------------------------------------------------
+// Purpose: Plays a footstep sound with temporary distance fades
+// Input  : bHeavy - Larger back hoof is considered a "heavy" step
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::Footstep( bool bHeavy )
+{
+	CBasePlayer *pPlayer = AI_GetSinglePlayer();
+	Assert( pPlayer != NULL );
+	if ( pPlayer == NULL )
+		return;
+
+	float flDistanceToPlayerSqr = ( pPlayer->GetAbsOrigin() - GetAbsOrigin() ).LengthSqr();
+	float flNearVolume = RemapValClamped( flDistanceToPlayerSqr, Square(10*12.0f), MIN_FOOTSTEP_NEAR_DIST, VOL_NORM, 0.0f );
+
+	EmitSound_t soundParams;
+	CPASAttenuationFilter filter( this );
+
+	if ( bHeavy )
+	{
+		if ( flNearVolume > 0.0f )
+		{
+			soundParams.m_pSoundName = "NPC_AntlionGuard.NearStepHeavy";
+			soundParams.m_flVolume = flNearVolume;
+			soundParams.m_nFlags = SND_CHANGE_VOL;
+			EmitSound( filter, entindex(), soundParams );
+		}
+
+		EmitSound( "NPC_AntlionGuard.FarStepHeavy" );
+	}
+	else
+	{
+		if ( flNearVolume > 0.0f )
+		{
+			soundParams.m_pSoundName = "NPC_AntlionGuard.NearStepLight";
+			soundParams.m_flVolume = flNearVolume;
+			soundParams.m_nFlags = SND_CHANGE_VOL;
+			EmitSound( filter, entindex(), soundParams );
+		}
+
+		EmitSound( "NPC_AntlionGuard.FarStepLight" );
+	}
+}
+
+float GetCurrentGravity( void );
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *pObject - 
+//			*pOut - 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::GetPhysicsShoveDir( CBaseEntity *pObject, float flMass, Vector *pOut )
+{
+	const Vector vecStart = pObject->WorldSpaceCenter();
+	const Vector vecTarget = GetEnemy()->WorldSpaceCenter();
+	
+	const float flBaseSpeed = 800.0f;
+	float flSpeed = RemapValClamped( flMass, 0.0f, 150.0f, flBaseSpeed * 2.0f, flBaseSpeed );
+
+	// Try the most direct route
+	Vector vecToss = VecCheckThrow( this, vecStart, vecTarget, flSpeed, 1.0f );
+
+	// If this failed then try a little faster (flattens the arc)
+	if ( vecToss == vec3_origin )
+	{
+		vecToss = VecCheckThrow( this, vecStart, vecTarget, flSpeed * 1.25f, 1.0f );
+		if ( vecToss == vec3_origin )
+		{
+			const float flGravity = GetCurrentGravity();
+
+			vecToss = (vecTarget - vecStart);
+
+			// throw at a constant time
+			float time = vecToss.Length( ) / flSpeed;
+			vecToss = vecToss * (1.0f / time);
+
+			// adjust upward toss to compensate for gravity loss
+			vecToss.z += flGravity * time * 0.5f;
+		}
+	}
+
+	// Save out the result
+	if ( pOut )
+	{
+		*pOut = vecToss;
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *pEvent - 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::HandleAnimEvent( animevent_t *pEvent )
+{
+	if ( pEvent->event == AE_ANTLIONGUARD_CHARGE_EARLYOUT )
+	{
+		// Robin: Removed this because it usually made him look less intelligent, not more.
+		//		  This code left here so we don't get warnings in the console.
+
+		/*
+		// Cancel the charge if it's no longer valid
+		if ( ShouldCharge( GetAbsOrigin(), GetEnemy()->GetAbsOrigin(), false, true ) == false )
+		{
+			SetSchedule( SCHED_ANTLIONGUARD_CHARGE_CANCEL );
+		}
+		*/
+
+		return;
+	}
+
+	// Don't handle anim events after death
+	if ( m_NPCState == NPC_STATE_DEAD )
+	{
+		BaseClass::HandleAnimEvent( pEvent );
+		return;
+	}
+
+	if ( pEvent->event == AE_ANTLIONGUARD_SHOVE_PHYSOBJECT )
+	{
+		if ( m_hPhysicsTarget == NULL )
+		{
+			// Disrupt other objects near us anyway
+			ImpactShock( WorldSpaceCenter(), 150, 250.0f );
+			return;
+		}
+
+		// If we have no enemy, we don't really have a direction to throw the object
+		// in. But, we still want to clobber it so the animevent doesn't happen fruitlessly,
+		// and we want to clear the condition flags and other state regarding the m_hPhysicsTarget.
+		// So, skip the code relevant to computing a launch vector specific to the object I'm
+		// striking, but use the ImpactShock call further below to punch everything in the neighborhood.
+		CBaseEntity *pEnemy = GetEnemy();
+		if ( pEnemy != NULL )
+		{
+			//Setup the throw velocity
+			IPhysicsObject *physObj = m_hPhysicsTarget->VPhysicsGetObject();
+			Vector vecShoveVel = ( pEnemy->GetAbsOrigin() - m_hPhysicsTarget->WorldSpaceCenter() );
+			float flTargetDist = VectorNormalize( vecShoveVel );
+
+			// Must still be close enough to our target
+			Vector shoveDir = m_hPhysicsTarget->WorldSpaceCenter() - WorldSpaceCenter();
+			float shoveDist = VectorNormalize( shoveDir );
+			if ( shoveDist > 300.0f )
+			{
+				// Pick a new target next time (this one foiled us!)
+				RememberFailedPhysicsTarget( m_hPhysicsTarget );
+				m_hPhysicsTarget = NULL;
+				return;
+			}
+
+			// Toss this if we're episodic
+			if ( hl2_episodic.GetBool() )
+			{
+				Vector vecTargetDir = vecShoveVel;
+
+				// Get our shove direction
+				GetPhysicsShoveDir( m_hPhysicsTarget, physObj->GetMass(), &vecShoveVel );
+
+				// If the player isn't looking at me, and isn't reachable, be more forgiving about hitting them
+				if ( HasCondition( COND_ENEMY_UNREACHABLE ) && HasCondition( COND_ENEMY_FACING_ME ) == false )
+				{
+					// Build an arc around the top of the target that we'll offset our aim by
+					Vector vecOffset;
+					float flSin, flCos;
+					float flRad = random->RandomFloat( 0, M_PI / 6.0f ); // +/- 30 deg
+					if ( random->RandomInt( 0, 1 ) )
+						flRad *= -1.0f;
+
+					SinCos( flRad, &flSin, &flCos );
+
+					// Rotate the 2-d circle to be "facing" along our shot direction
+					Vector vecArc;
+					QAngle vecAngles;
+					VectorAngles( vecTargetDir, vecAngles );
+					VectorRotate( Vector( 0.0f, flCos, flSin ), vecAngles, vecArc );
+
+					// Find the radius by which to avoid the player
+					float flOffsetRadius = ( m_hPhysicsTarget->CollisionProp()->BoundingRadius() + GetEnemy()->CollisionProp()->BoundingRadius() ) * 1.5f;
+
+					// Add this to our velocity to offset it
+					vecShoveVel += ( vecArc * flOffsetRadius );
+				}
+
+				// Factor out mass
+				vecShoveVel *= physObj->GetMass();
+				
+				// FIXME: We need to restore this on the object at some point if we do this!
+				float flDragCoef = 0.0f;
+				physObj->SetDragCoefficient( &flDragCoef, &flDragCoef );
+			}
+			else
+			{
+				if ( flTargetDist < 512 )
+					flTargetDist = 512;
+
+				if ( flTargetDist > 1024 )
+					flTargetDist = 1024;
+
+				vecShoveVel *= flTargetDist * 3 * physObj->GetMass();	//FIXME: Scale by skill
+				vecShoveVel[2] += physObj->GetMass() * 350.0f;
+			}
+
+			if ( NPC_Rollermine_IsRollermine( m_hPhysicsTarget ) )
+			{
+				Pickup_OnPhysGunDrop( m_hPhysicsTarget, NULL, LAUNCHED_BY_CANNON );
+			}
+
+			//Send it flying
+			AngularImpulse angVel( random->RandomFloat(-180, 180), 100, random->RandomFloat(-360, 360) );
+			physObj->ApplyForceCenter( vecShoveVel );
+			physObj->AddVelocity( NULL, &angVel );
+		}
+						
+		//Display dust
+		Vector vecRandom = RandomVector( -1, 1);
+		VectorNormalize( vecRandom );
+		g_pEffects->Dust( m_hPhysicsTarget->WorldSpaceCenter(), vecRandom, 64.0f, 32 );
+
+		// If it's being held by the player, break that bond
+		Pickup_ForcePlayerToDropThisObject( m_hPhysicsTarget );
+
+		EmitSound( "NPC_AntlionGuard.HitHard" );
+
+		//Clear the state information, we're done
+		ClearCondition( COND_ANTLIONGUARD_PHYSICS_TARGET );
+		ClearCondition( COND_ANTLIONGUARD_PHYSICS_TARGET_INVALID );
+
+		// Disrupt other objects near it, including the m_hPhysicsTarget if we had no valid enemy
+		ImpactShock( m_hPhysicsTarget->WorldSpaceCenter(), 150, 250.0f, pEnemy != NULL ? m_hPhysicsTarget : NULL );
+
+		// Notify any squad members that we're no longer monopolizing this object
+		if ( GetSquad() != NULL )
+		{
+			GetSquad()->BroadcastInteraction( g_interactionAntlionGuardShovedPhysicsObject, (void *)((CBaseEntity *)m_hPhysicsTarget), this );
+		}
+
+		m_hPhysicsTarget = NULL;
+		m_FailedPhysicsTargets.RemoveAll();
+
+		return;
+	}
+	
+	if ( pEvent->event == AE_ANTLIONGUARD_CHARGE_HIT )
+	{
+		UTIL_ScreenShake( GetAbsOrigin(), 32.0f, 4.0f, 1.0f, 512, SHAKE_START );
+		EmitSound( "NPC_AntlionGuard.HitHard" );
+
+		Vector	startPos = GetAbsOrigin();
+		float	checkSize = ( CollisionProp()->BoundingRadius() + 8.0f );
+		Vector	endPos = startPos + ( BodyDirection3D() * checkSize );
+
+		CTraceFilterCharge traceFilter( this, COLLISION_GROUP_NONE, this );
+
+		Ray_t ray;
+		ray.Init( startPos, endPos, GetHullMins(), GetHullMaxs() );
+
+		trace_t tr;
+		enginetrace->TraceRay( ray, MASK_SHOT, &traceFilter, &tr );
+
+		if ( g_debug_antlionguard.GetInt() == 1 )
+		{
+			Vector hullMaxs = GetHullMaxs();
+			hullMaxs.x += checkSize;
+
+			NDebugOverlay::BoxDirection( startPos, GetHullMins(), hullMaxs, BodyDirection2D(), 100, 255, 255, 20, 1.0f );
+		}
+
+		//NDebugOverlay::Box3D( startPos, endPos, BodyDirection2D(), 
+		if ( m_hChargeTarget && m_hChargeTarget->IsAlive() == false )
+		{
+			m_hChargeTarget = NULL;
+			m_hChargeTargetPosition = NULL;
+		}
+
+		// Cause a shock wave from this point which will distrupt nearby physics objects
+		ImpactShock( tr.endpos, 200, 500 );
+		return;
+	}
+
+	if ( pEvent->event == AE_ANTLIONGUARD_SHOVE )
+	{
+		EmitSound("NPC_AntlionGuard.StepLight", pEvent->eventtime );
+		Shove();
+		return;
+	}
+
+	if ( pEvent->event == AE_ANTLIONGUARD_FOOTSTEP_LIGHT )
+	{
+		if ( HasSpawnFlags(SF_ANTLIONGUARD_INSIDE_FOOTSTEPS) )
+		{
+#if HL2_EPISODIC
+			Footstep( false );
+#else 
+			EmitSound("NPC_AntlionGuard.Inside.StepLight", pEvent->eventtime );
+#endif // HL2_EPISODIC
+		}
+		else
+		{
+#if HL2_EPISODIC
+			Footstep( false );
+#else 
+			EmitSound("NPC_AntlionGuard.StepLight", pEvent->eventtime );
+#endif // HL2_EPISODIC
+		}
+		return;
+	}
+
+	if ( pEvent->event == AE_ANTLIONGUARD_FOOTSTEP_HEAVY )
+	{
+		if ( HasSpawnFlags(SF_ANTLIONGUARD_INSIDE_FOOTSTEPS) )
+		{
+#if HL2_EPISODIC
+			Footstep( true );
+#else 
+			EmitSound( "NPC_AntlionGuard.Inside.StepHeavy", pEvent->eventtime );
+#endif // HL2_EPISODIC
+		}
+		else
+		{
+#if HL2_EPISODIC
+			Footstep( true );
+#else 
+			EmitSound( "NPC_AntlionGuard.StepHeavy", pEvent->eventtime );
+#endif // HL2_EPISODIC
+		}
+		return;
+	}
+	
+	if ( pEvent->event == AE_ANTLIONGUARD_VOICE_GROWL )
+	{
+		StartSounds();
+
+		float duration = 0.0f;
+
+		if ( random->RandomInt( 0, 10 ) < 6 )
+		{
+			duration = ENVELOPE_CONTROLLER.SoundPlayEnvelope( m_pGrowlHighSound, SOUNDCTRL_CHANGE_VOLUME, envAntlionGuardFastGrowl, ARRAYSIZE(envAntlionGuardFastGrowl) );
+		}
+		else
+		{
+			duration = 1.0f;
+			EmitSound( "NPC_AntlionGuard.FrustratedRoar" );
+			ENVELOPE_CONTROLLER.SoundFadeOut( m_pGrowlHighSound, 0.5f, false );
+		}
+		
+		m_flAngerNoiseTime = gpGlobals->curtime + duration + random->RandomFloat( 2.0f, 4.0f );
+
+		ENVELOPE_CONTROLLER.SoundChangeVolume( m_pBreathSound, 0.0f, 0.1f );
+		ENVELOPE_CONTROLLER.SoundChangeVolume( m_pGrowlIdleSound, 0.0f, 0.1f );
+
+		m_flBreathTime = gpGlobals->curtime + duration - 0.2f;
+
+		EmitSound( "NPC_AntlionGuard.Anger" );
+		return;
+	}
+		
+
+	if ( pEvent->event == AE_ANTLIONGUARD_VOICE_BARK )
+	{
+		StartSounds();
+
+		float duration = ENVELOPE_CONTROLLER.SoundPlayEnvelope( m_pGrowlHighSound, SOUNDCTRL_CHANGE_VOLUME, envAntlionGuardBark1, ARRAYSIZE(envAntlionGuardBark1) );
+		ENVELOPE_CONTROLLER.SoundPlayEnvelope( m_pConfusedSound, SOUNDCTRL_CHANGE_VOLUME, envAntlionGuardBark2, ARRAYSIZE(envAntlionGuardBark2) );
+		
+		m_flAngerNoiseTime = gpGlobals->curtime + duration + random->RandomFloat( 2.0f, 4.0f );
+
+		ENVELOPE_CONTROLLER.SoundChangeVolume( m_pBreathSound, 0.0f, 0.1f );
+		ENVELOPE_CONTROLLER.SoundChangeVolume( m_pGrowlIdleSound, 0.0f, 0.1f );
+		
+		m_flBreathTime = gpGlobals->curtime + duration - 0.2f;
+		return;
+	}
+	
+	if ( pEvent->event == AE_ANTLIONGUARD_VOICE_ROAR )
+	{
+		StartSounds();
+
+		float duration = ENVELOPE_CONTROLLER.SoundPlayEnvelope( m_pGrowlHighSound, SOUNDCTRL_CHANGE_VOLUME, envAntlionGuardFastGrowl, ARRAYSIZE(envAntlionGuardFastGrowl) );
+		
+		m_flAngerNoiseTime = gpGlobals->curtime + duration + random->RandomFloat( 2.0f, 4.0f );
+
+		ENVELOPE_CONTROLLER.SoundChangeVolume( m_pBreathSound, 0.0f, 0.1f );
+		ENVELOPE_CONTROLLER.SoundChangeVolume( m_pGrowlIdleSound, 0.0f, 0.1f );
+
+		m_flBreathTime = gpGlobals->curtime + duration - 0.2f;
+
+		EmitSound( "NPC_AntlionGuard.Roar" );
+		return;
+	}
+
+	if ( pEvent->event == AE_ANTLIONGUARD_VOICE_PAIN )
+	{
+		StartSounds();
+
+		float duration = ENVELOPE_CONTROLLER.SoundPlayEnvelope( m_pConfusedSound, SOUNDCTRL_CHANGE_VOLUME, envAntlionGuardPain1, ARRAYSIZE(envAntlionGuardPain1) );
+		ENVELOPE_CONTROLLER.SoundPlayEnvelope( m_pGrowlHighSound, SOUNDCTRL_CHANGE_VOLUME, envAntlionGuardBark2, ARRAYSIZE(envAntlionGuardBark2) );
+		
+		ENVELOPE_CONTROLLER.SoundChangeVolume( m_pBreathSound, 0.0f, 0.1f );
+		ENVELOPE_CONTROLLER.SoundChangeVolume( m_pGrowlIdleSound, 0.0f, 0.1f );
+		
+		m_flBreathTime = gpGlobals->curtime + duration - 0.2f;
+		return;
+	}
+
+	if ( pEvent->event == AE_ANTLIONGUARD_VOICE_SQUEEZE )
+	{	
+		StartSounds();
+
+		float duration = ENVELOPE_CONTROLLER.SoundPlayEnvelope( m_pGrowlHighSound, SOUNDCTRL_CHANGE_VOLUME, envAntlionGuardSqueeze, ARRAYSIZE(envAntlionGuardSqueeze) );
+		
+		ENVELOPE_CONTROLLER.SoundChangeVolume( m_pBreathSound, 0.6f, random->RandomFloat( 2.0f, 4.0f ) );
+		ENVELOPE_CONTROLLER.SoundChangePitch( m_pBreathSound, random->RandomInt( 60, 80 ), random->RandomFloat( 2.0f, 4.0f ) );
+
+		ENVELOPE_CONTROLLER.SoundChangeVolume( m_pGrowlIdleSound, 0.0f, 0.1f );
+
+		m_flBreathTime = gpGlobals->curtime + ( duration * 0.5f );
+
+		EmitSound( "NPC_AntlionGuard.Anger" );
+		return;
+	}
+
+	if ( pEvent->event == AE_ANTLIONGUARD_VOICE_SCRATCH )
+	{	
+		StartSounds();
+
+		float duration = random->RandomFloat( 2.0f, 4.0f );
+
+		ENVELOPE_CONTROLLER.SoundChangeVolume( m_pBreathSound, 0.6f, duration );
+		ENVELOPE_CONTROLLER.SoundChangePitch( m_pBreathSound, random->RandomInt( 60, 80 ), duration );
+
+		ENVELOPE_CONTROLLER.SoundChangeVolume( m_pGrowlIdleSound, 0.0f, 0.1f );
+
+		m_flBreathTime = gpGlobals->curtime + duration;
+
+		EmitSound( "NPC_AntlionGuard.Anger" );
+		return;
+	}
+		
+	if ( pEvent->event == AE_ANTLIONGUARD_VOICE_GRUNT )
+	{	
+		StartSounds();
+
+		float duration = ENVELOPE_CONTROLLER.SoundPlayEnvelope( m_pConfusedSound, SOUNDCTRL_CHANGE_VOLUME, envAntlionGuardGrunt, ARRAYSIZE(envAntlionGuardGrunt) );
+		ENVELOPE_CONTROLLER.SoundPlayEnvelope( m_pGrowlHighSound, SOUNDCTRL_CHANGE_VOLUME, envAntlionGuardGrunt2, ARRAYSIZE(envAntlionGuardGrunt2) );
+		
+		ENVELOPE_CONTROLLER.SoundChangeVolume( m_pBreathSound, 0.0f, 0.1f );
+		ENVELOPE_CONTROLLER.SoundChangeVolume( m_pGrowlIdleSound, 0.0f, 0.1f );
+
+		m_flBreathTime = gpGlobals->curtime + duration;
+		return;
+	}
+
+	if ( pEvent->event == AE_ANTLIONGUARD_BURROW_OUT )
+	{
+		EmitSound( "NPC_Antlion.BurrowOut" );
+
+		//Shake the screen
+		UTIL_ScreenShake( GetAbsOrigin(), 0.5f, 80.0f, 1.0f, 256.0f, SHAKE_START );
+
+		//Throw dust up
+		UTIL_CreateAntlionDust( GetAbsOrigin() + Vector(0,0,24), GetLocalAngles() );
+
+		RemoveEffects( EF_NODRAW );
+		RemoveFlag( FL_NOTARGET );
+
+		if ( m_bCavernBreed )
+		{
+			if ( m_hCaveGlow[0] )
+				m_hCaveGlow[0]->TurnOn();
+
+			if ( m_hCaveGlow[1] )
+				m_hCaveGlow[1]->TurnOn();
+		}
+
+		return;
+	}
+
+	BaseClass::HandleAnimEvent( pEvent );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::SetHeavyDamageAnim( const Vector &vecSource )
+{
+	if ( !m_bInCavern )
+	{
+		Vector vFacing = BodyDirection2D();
+		Vector vDamageDir = ( vecSource - WorldSpaceCenter() );
+
+		vDamageDir.z = 0.0f;
+
+		VectorNormalize( vDamageDir );
+
+		Vector vDamageRight, vDamageUp;
+		VectorVectors( vDamageDir, vDamageRight, vDamageUp );
+
+		float damageDot = DotProduct( vFacing, vDamageDir );
+		float damageRightDot = DotProduct( vFacing, vDamageRight );
+
+		// See if it's in front
+		if ( damageDot > 0.0f )
+		{
+			// See if it's right
+			if ( damageRightDot > 0.0f )
+			{
+				m_nFlinchActivity = ACT_ANTLIONGUARD_PHYSHIT_FR;
+			}
+			else
+			{
+				m_nFlinchActivity = ACT_ANTLIONGUARD_PHYSHIT_FL;
+			}
+		}
+		else
+		{
+			// Otherwise it's from behind
+			if ( damageRightDot < 0.0f )
+			{
+				m_nFlinchActivity = ACT_ANTLIONGUARD_PHYSHIT_RR;
+			}
+			else
+			{
+				m_nFlinchActivity = ACT_ANTLIONGUARD_PHYSHIT_RL;
+			}
+		}
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : &info - 
+//-----------------------------------------------------------------------------
+int CNPC_AntlionGuard::OnTakeDamage_Alive( const CTakeDamageInfo &info )
+{
+	CTakeDamageInfo dInfo = info;
+
+	// Don't take damage from another antlion guard!
+	if ( dInfo.GetAttacker() && dInfo.GetAttacker() != this && FClassnameIs( dInfo.GetAttacker(), "npc_antlionguard" ) )
+		return 0;
+
+	if ( ( dInfo.GetDamageType() & DMG_CRUSH ) && !( dInfo.GetDamageType() & DMG_VEHICLE ) )
+	{
+		// Don't take damage from physics objects that weren't thrown by the player.
+		CBaseEntity *pInflictor = dInfo.GetInflictor();
+
+		IPhysicsObject *pObj = pInflictor->VPhysicsGetObject();
+		if ( !pObj || !( pObj->GetGameFlags() & FVPHYSICS_WAS_THROWN ) )
+		{
+			return 0;
+		}
+	}
+
+	// Hack to make antlion guard harder in HARD
+	if ( g_pGameRules->IsSkillLevel(SKILL_HARD) && !(info.GetDamageType() & DMG_CRUSH) )
+	{
+		dInfo.SetDamage( dInfo.GetDamage() * 0.75 );
+	}
+
+	// Cap damage taken by crushing (otherwise we can get crushed oddly)
+	if ( ( dInfo.GetDamageType() & DMG_CRUSH ) && dInfo.GetDamage() > 100 )
+	{
+		dInfo.SetDamage( 100 );
+	}
+
+	// Only take damage from what we classify as heavy damages (explosions, refrigerators, etc)
+	if ( IsHeavyDamage( dInfo ) )
+	{
+		// Always take a set amount of damage from a combine ball
+		if ( info.GetInflictor() && UTIL_IsCombineBall( info.GetInflictor() ) )
+		{
+			dInfo.SetDamage( 50 );
+		}
+
+		UTIL_ScreenShake( GetAbsOrigin(), 32.0f, 8.0f, 0.5f, 512, SHAKE_START );
+
+		// Set our response animation
+		SetHeavyDamageAnim( dInfo.GetDamagePosition() );
+
+		// Explosive barrels don't carry through their attacker, so this 
+		// condition isn't set, and we still want to flinch. So we set it.
+		SetCondition( COND_HEAVY_DAMAGE );
+
+		// TODO: Make this its own effect!
+		CEffectData data;
+		data.m_vOrigin = dInfo.GetDamagePosition();
+		data.m_vNormal = -dInfo.GetDamageForce();
+		VectorNormalize( data.m_vNormal );
+		DispatchEffect( "HunterDamage", data );
+
+		// Play a sound for a physics impact
+		if ( dInfo.GetDamageType() & DMG_CRUSH )
+		{
+			EmitSound("NPC_AntlionGuard.ShellCrack");
+		}
+
+		// Roar in pain
+		EmitSound( "NPC_AntlionGuard.Pain_Roar" );
+
+		// TODO: This will require a more complete solution; for now let's shelve it!
+		/*
+		if ( dInfo.GetDamageType() & DMG_BLAST )
+		{
+			// Create the dust effect in place
+			CParticleSystem *pParticle = (CParticleSystem *) CreateEntityByName( "info_particle_system" );
+			if ( pParticle != NULL )
+			{
+				// Setup our basic parameters
+				pParticle->KeyValue( "start_active", "1" );
+				pParticle->KeyValue( "effect_name", "fire_medium_02_nosmoke" );
+				pParticle->SetParent( this );
+				pParticle->SetParentAttachment( "SetParentAttachment", "attach_glow2", true );
+				pParticle->SetLocalOrigin( Vector( -16, 24, 0 ) );
+				DispatchSpawn( pParticle );
+				if ( gpGlobals->curtime > 0.5f )
+					pParticle->Activate();
+				
+				pParticle->SetThink( &CBaseEntity::SUB_Remove );
+				pParticle->SetNextThink( gpGlobals->curtime + random->RandomFloat( 2.0f, 3.0f ) );
+			}
+		}
+		*/
+	}
+	
+	int nPreHealth = GetHealth();
+	int nDamageTaken = BaseClass::OnTakeDamage_Alive( dInfo );
+
+	// See if we've crossed a measured phase in our health and flinch from that to show we do take damage
+	if ( !m_bInCavern && HasCondition( COND_HEAVY_DAMAGE ) == false && ( info.GetDamageType() & DMG_BULLET ) )
+	{
+		bool bTakeHeavyDamage = false;
+
+		// Do an early flinch so that players understand the guard can be hurt by 
+		if ( ( (float) GetHealth() / (float) GetMaxHealth() ) > 0.9f )
+		{
+			float flPrePerc = (float) nPreHealth / (float) GetMaxHealth();
+			float flPostPerc = (float) GetHealth() / (float) GetMaxHealth();
+			if ( flPrePerc >= 0.95f && flPostPerc < 0.95f )
+			{
+				bTakeHeavyDamage = true;
+			}
+		}
+
+		// Otherwise see if we've passed a measured point in our health
+		if ( bTakeHeavyDamage == false )
+		{
+			const float flNumDamagePhases =	5.0f;
+
+			float flDenom = ( (float) GetMaxHealth() / flNumDamagePhases );
+			int nPreDamagePhase = ceil( (float) nPreHealth / flDenom );
+			int nPostDamagePhase = ceil( (float) GetHealth() / flDenom );
+			if ( nPreDamagePhase != nPostDamagePhase )
+			{
+				bTakeHeavyDamage = true;
+			}
+		}
+
+		// Flinch if we should
+		if ( bTakeHeavyDamage )
+		{
+			// Set our response animation
+			SetHeavyDamageAnim( dInfo.GetDamagePosition() );
+
+			// Roar in pain
+			EmitSound( "NPC_AntlionGuard.Pain_Roar" );
+
+			// Flinch!
+			SetCondition( COND_HEAVY_DAMAGE );
+		}
+	}
+
+	return nDamageTaken;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *pAttacker - 
+//			flDamage - 
+//			&vecDir - 
+//			*ptr - 
+//			bitsDamageType - 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::TraceAttack( const CTakeDamageInfo &inputInfo, const Vector &vecDir, trace_t *ptr, CDmgAccumulator *pAccumulator )
+{
+	CTakeDamageInfo info = inputInfo;
+
+	// Bullets are weak against us, buckshot less so
+	if ( info.GetDamageType() & DMG_BUCKSHOT )
+	{
+		info.ScaleDamage( 0.5f );
+	}
+	else if ( info.GetDamageType() & DMG_BULLET )
+	{
+		info.ScaleDamage( 0.25f );
+	}
+
+	// Make sure we haven't rounded down to a minimal amount
+	if ( info.GetDamage() < 1.0f )
+	{
+		info.SetDamage( 1.0f );
+	}
+
+	BaseClass::TraceAttack( info, vecDir, ptr, pAccumulator );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *pTask - 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::StartTask( const Task_t *pTask )
+{
+	switch ( pTask->iTask )
+	{
+	case TASK_ANTLIONGUARD_SET_FLINCH_ACTIVITY:
+		SetIdealActivity( (Activity) m_nFlinchActivity );
+		break;
+
+	case TASK_ANTLIONGUARD_SUMMON:
+		SummonAntlions();
+		m_OnSummon.FireOutput( this, this, 0 );
+		TaskComplete();
+		break;
+
+	case TASK_ANTLIONGUARD_SHOVE_PHYSOBJECT:
+		{
+			if ( ( m_hPhysicsTarget == NULL ) || ( GetEnemy() == NULL ) )
+			{
+				TaskFail( "Tried to shove a NULL physics target!\n" );
+				break;
+			}
+			
+			//Get the direction and distance to our thrown object
+			Vector	dirToTarget = ( m_hPhysicsTarget->WorldSpaceCenter() - WorldSpaceCenter() );
+			float	distToTarget = VectorNormalize( dirToTarget );
+			dirToTarget.z = 0;
+
+			//Validate it's still close enough to shove
+			//FIXME: Real numbers
+			if ( distToTarget > 256.0f )
+			{
+				RememberFailedPhysicsTarget( m_hPhysicsTarget );
+				m_hPhysicsTarget = NULL;
+
+				TaskFail( "Shove target moved\n" );
+				break;
+			}
+
+			//Validate its offset from our facing
+			float targetYaw = UTIL_VecToYaw( dirToTarget );
+			float offset = UTIL_AngleDiff( targetYaw, UTIL_AngleMod( GetLocalAngles().y ) );
+
+			if ( fabs( offset ) > 55 )
+			{
+				RememberFailedPhysicsTarget( m_hPhysicsTarget );
+				m_hPhysicsTarget = NULL;
+
+				TaskFail( "Shove target off-center\n" );
+				break;
+			}
+
+			//Blend properly
+			SetPoseParameter( m_poseThrow, offset );
+
+			//Start playing the animation
+			SetActivity( ACT_ANTLIONGUARD_SHOVE_PHYSOBJECT );
+		}
+		break;
+
+	case TASK_ANTLIONGUARD_FIND_PHYSOBJECT:
+		{
+			if ( m_bInCavern && !m_bPreferPhysicsAttack ) 
+			{
+				TaskFail( "Cavern guard is not allowed to use physics attacks." );
+			}
+
+			// Force the antlion guard to find a physobject
+			m_flPhysicsCheckTime = 0;
+			UpdatePhysicsTarget( false, (100*12) );
+			if ( m_hPhysicsTarget )
+			{
+				TaskComplete();
+			}
+			else
+			{
+				TaskFail( "Failed to find a physobject.\n" );
+			}
+		}
+		break;
+
+	case TASK_ANTLIONGUARD_GET_PATH_TO_PHYSOBJECT:
+		{
+			if ( ( m_hPhysicsTarget == NULL ) || ( GetEnemy() == NULL ) )
+			{
+				TaskFail( "Tried to find a path to NULL physics target!\n" );
+				break;
+			}
+			
+			Vector vecGoalPos = m_vecPhysicsHitPosition; 
+			AI_NavGoal_t goal( GOALTYPE_LOCATION, vecGoalPos, ACT_RUN );
+
+			if ( GetNavigator()->SetGoal( goal ) )
+			{
+				if ( g_debug_antlionguard.GetInt() == 1 )
+				{
+					NDebugOverlay::Cross3D( vecGoalPos, Vector(8,8,8), -Vector(8,8,8), 0, 255, 0, true, 2.0f );
+					NDebugOverlay::Line( vecGoalPos, m_hPhysicsTarget->WorldSpaceCenter(), 0, 255, 0, true, 2.0f );
+					NDebugOverlay::Line( m_hPhysicsTarget->WorldSpaceCenter(), GetEnemy()->WorldSpaceCenter(), 0, 255, 0, true, 2.0f );
+				}
+
+				// Face the enemy
+				GetNavigator()->SetArrivalDirection( GetEnemy() );
+				TaskComplete();
+			}
+			else
+			{
+				if ( g_debug_antlionguard.GetInt() == 1 )
+				{
+					NDebugOverlay::Cross3D( vecGoalPos, Vector(8,8,8), -Vector(8,8,8), 255, 0, 0, true, 2.0f );
+					NDebugOverlay::Line( vecGoalPos, m_hPhysicsTarget->WorldSpaceCenter(), 255, 0, 0, true, 2.0f );
+					NDebugOverlay::Line( m_hPhysicsTarget->WorldSpaceCenter(), GetEnemy()->WorldSpaceCenter(), 255, 0, 0, true, 2.0f );
+				}
+
+				RememberFailedPhysicsTarget( m_hPhysicsTarget );
+				m_hPhysicsTarget = NULL;
+				TaskFail( "Unable to navigate to physics attack target!\n" );
+				break;
+			}
+
+			//!!!HACKHACK - this is a hack that covers a bug in antlion guard physics target selection! (Tracker #77601)
+			// This piece of code (combined with some code in GatherConditions) COVERS THE BUG by escaping the schedule
+			// if 30 seconds have passed (it should never take this long for the guard to get to an object and hit it).
+			// It's too scary to figure out why this particular antlion guard can't get to its object, but we're shipping
+			// like, tomorrow. (sjb) 8/22/2007
+			m_flWaitFinished = gpGlobals->curtime + 30.0f;
+		}
+		break;
+
+	case TASK_ANTLIONGUARD_CHARGE:
+		{
+			// HACK: Because the guard stops running his normal blended movement 
+			//		 here, he also needs to remove his blended movement layers!
+			GetMotor()->MoveStop();
+
+			SetActivity( ACT_ANTLIONGUARD_CHARGE_START );
+			m_bDecidedNotToStop = false;
+		}
+		break;
+
+
+	case TASK_ANTLIONGUARD_GET_PATH_TO_CHARGE_POSITION:
+		{
+			if ( !m_hChargeTargetPosition )
+			{
+				TaskFail( "Tried to find a charge position without one specified.\n" );
+				break;
+			}
+
+			// Move to the charge position
+			AI_NavGoal_t goal( GOALTYPE_LOCATION, m_hChargeTargetPosition->GetAbsOrigin(), ACT_RUN );
+			if ( GetNavigator()->SetGoal( goal ) )
+			{
+				// We want to face towards the charge target
+				Vector vecDir = m_hChargeTarget->GetAbsOrigin() - m_hChargeTargetPosition->GetAbsOrigin();
+				VectorNormalize( vecDir );
+				vecDir.z = 0;
+				GetNavigator()->SetArrivalDirection( vecDir );
+				TaskComplete();
+			}
+			else
+			{
+				m_hChargeTarget = NULL;
+				m_hChargeTargetPosition = NULL;
+				TaskFail( FAIL_NO_ROUTE );
+			}
+		}
+		break;
+
+	case TASK_ANTLIONGUARD_GET_PATH_TO_NEAREST_NODE:
+		{
+			if ( !GetEnemy() )
+			{
+				TaskFail( FAIL_NO_ENEMY );
+				break;
+			}
+
+			// Find the nearest node to the enemy
+			int node = GetNavigator()->GetNetwork()->NearestNodeToPoint( this, GetEnemy()->GetAbsOrigin(), false );
+			CAI_Node *pNode = GetNavigator()->GetNetwork()->GetNode( node );
+			if( pNode == NULL )
+			{
+				TaskFail( FAIL_NO_ROUTE );
+				break;
+			}
+
+			Vector vecNodePos = pNode->GetPosition( GetHullType() );
+			AI_NavGoal_t goal( GOALTYPE_LOCATION, vecNodePos, ACT_RUN );
+			if ( GetNavigator()->SetGoal( goal ) )
+			{
+				GetNavigator()->SetArrivalDirection( GetEnemy() );
+				TaskComplete();
+				break;
+			}
+
+
+			TaskFail( FAIL_NO_ROUTE );
+			break;
+		}
+		break;
+
+	case TASK_ANTLIONGUARD_GET_CHASE_PATH_ENEMY_TOLERANCE:
+		{
+			// Chase the enemy, but allow local navigation to succeed if it gets within the goal tolerance
+			GetNavigator()->SetLocalSucceedOnWithinTolerance( true );
+
+			if ( GetNavigator()->SetGoal( GOALTYPE_ENEMY ) )
+			{
+				TaskComplete();
+			}
+			else
+			{
+				RememberUnreachable(GetEnemy());
+				TaskFail(FAIL_NO_ROUTE);
+			}
+
+			GetNavigator()->SetLocalSucceedOnWithinTolerance( false );
+		}
+		break;
+
+	case TASK_ANTLIONGUARD_OPPORTUNITY_THROW:
+		{
+			// If we've got some live antlions, look for a physics object to throw
+			if ( m_iNumLiveAntlions >= 2 && RandomFloat(0,1) > 0.5 )
+			{
+				m_FailedPhysicsTargets.RemoveAll();
+				UpdatePhysicsTarget( false, m_bPreferPhysicsAttack ? (100*12) : ANTLIONGUARD_FARTHEST_PHYSICS_OBJECT  );
+				if ( HasCondition( COND_ANTLIONGUARD_PHYSICS_TARGET ) && !m_bInCavern )
+				{
+					SetSchedule( SCHED_ANTLIONGUARD_PHYSICS_ATTACK );
+				}
+			}
+
+			TaskComplete();
+		}
+		break;
+
+	default:
+		BaseClass::StartTask(pTask);
+		break;
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Calculate & apply damage & force for a charge to a target.
+//			Done outside of the guard because we need to do this inside a trace filter.
+//-----------------------------------------------------------------------------
+void ApplyChargeDamage( CBaseEntity *pAntlionGuard, CBaseEntity *pTarget, float flDamage )
+{
+	Vector attackDir = ( pTarget->WorldSpaceCenter() - pAntlionGuard->WorldSpaceCenter() );
+	VectorNormalize( attackDir );
+	Vector offset = RandomVector( -32, 32 ) + pTarget->WorldSpaceCenter();
+
+	// Generate enough force to make a 75kg guy move away at 700 in/sec
+	Vector vecForce = attackDir * ImpulseScale( 75, 700 );
+
+	// Deal the damage
+	CTakeDamageInfo	info( pAntlionGuard, pAntlionGuard, vecForce, offset, flDamage, DMG_CLUB );
+	pTarget->TakeDamage( info );
+
+#if HL2_EPISODIC
+	// If I am a cavern guard attacking the player, and he still lives, then poison him too.
+	Assert( dynamic_cast<CNPC_AntlionGuard *>(pAntlionGuard) );
+
+	if ( static_cast<CNPC_AntlionGuard *>(pAntlionGuard)->IsInCavern() && pTarget->IsPlayer() && pTarget->IsAlive() && pTarget->m_iHealth > ANTLIONGUARD_POISON_TO)
+	{
+		// That didn't finish them. Take them down to one point with poison damage. It'll heal.
+		pTarget->TakeDamage( CTakeDamageInfo( pAntlionGuard, pAntlionGuard, pTarget->m_iHealth - ANTLIONGUARD_POISON_TO, DMG_POISON ) );
+	}
+#endif
+
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: A simple trace filter class to skip small moveable physics objects
+//-----------------------------------------------------------------------------
+class CTraceFilterSkipPhysics : public CTraceFilter
+{
+public:
+	// It does have a base, but we'll never network anything below here..
+	DECLARE_CLASS_NOBASE( CTraceFilterSkipPhysics );
+	
+	CTraceFilterSkipPhysics( const IHandleEntity *passentity, int collisionGroup, float minMass )
+		: m_pPassEnt(passentity), m_collisionGroup(collisionGroup), m_minMass(minMass)
+	{
+	}
+	virtual bool ShouldHitEntity( IHandleEntity *pHandleEntity, int contentsMask )
+	{
+		if ( !StandardFilterRules( pHandleEntity, contentsMask ) )
+			return false;
+
+		if ( !PassServerEntityFilter( pHandleEntity, m_pPassEnt ) )
+			return false;
+
+		// Don't test if the game code tells us we should ignore this collision...
+		CBaseEntity *pEntity = EntityFromEntityHandle( pHandleEntity );
+		if ( pEntity )
+		{
+			if ( !pEntity->ShouldCollide( m_collisionGroup, contentsMask ) )
+				return false;
+			
+			if ( !g_pGameRules->ShouldCollide( m_collisionGroup, pEntity->GetCollisionGroup() ) )
+				return false;
+
+			// don't test small moveable physics objects (unless it's an NPC)
+			if ( !pEntity->IsNPC() && pEntity->GetMoveType() == MOVETYPE_VPHYSICS )
+			{
+				IPhysicsObject *pPhysics = pEntity->VPhysicsGetObject();
+				Assert(pPhysics);
+				if ( pPhysics->IsMoveable() && pPhysics->GetMass() < m_minMass )
+					return false;
+			}
+
+			// If we hit an antlion, don't stop, but kill it
+			if ( pEntity->Classify() == CLASS_ANTLION )
+			{
+				CBaseEntity *pGuard = (CBaseEntity*)EntityFromEntityHandle( m_pPassEnt );
+				ApplyChargeDamage( pGuard, pEntity, pEntity->GetHealth() );
+				return false;
+			}
+		}
+
+		return true;
+	}
+
+
+
+private:
+	const IHandleEntity *m_pPassEnt;
+	int m_collisionGroup;
+	float m_minMass;
+};
+
+inline void TraceHull_SkipPhysics( const Vector &vecAbsStart, const Vector &vecAbsEnd, const Vector &hullMin, 
+					 const Vector &hullMax,	unsigned int mask, const CBaseEntity *ignore, 
+					 int collisionGroup, trace_t *ptr, float minMass )
+{
+	Ray_t ray;
+	ray.Init( vecAbsStart, vecAbsEnd, hullMin, hullMax );
+	CTraceFilterSkipPhysics traceFilter( ignore, collisionGroup, minMass );
+	enginetrace->TraceRay( ray, mask, &traceFilter, ptr );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Return true if our charge target is right in front of the guard
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+bool CNPC_AntlionGuard::EnemyIsRightInFrontOfMe( CBaseEntity **pEntity )
+{
+	if ( !GetEnemy() )
+		return false;
+
+	if ( (GetEnemy()->WorldSpaceCenter() - WorldSpaceCenter()).LengthSqr() < (156*156) )
+	{
+		Vector vecLOS = ( GetEnemy()->GetAbsOrigin() - GetAbsOrigin() );
+		vecLOS.z = 0;
+		VectorNormalize( vecLOS );
+		Vector vBodyDir = BodyDirection2D();
+		if ( DotProduct( vecLOS, vBodyDir ) > 0.8 )
+		{
+			// He's in front of me, and close. Make sure he's not behind a wall.
+			trace_t tr;
+			UTIL_TraceLine( WorldSpaceCenter(), GetEnemy()->EyePosition(), MASK_SOLID, this, COLLISION_GROUP_NONE, &tr );
+			if ( tr.m_pEnt == GetEnemy() )
+			{
+				*pEntity = tr.m_pEnt;
+				return true;
+			}
+		}
+	}
+
+	return false;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: While charging, look ahead and see if we're going to run into anything.
+//			If we are, start the gesture so it looks like we're anticipating the hit.
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::ChargeLookAhead( void )
+{
+	trace_t	tr;
+	Vector vecForward;
+	GetVectors( &vecForward, NULL, NULL );
+	Vector vecTestPos = GetAbsOrigin() + ( vecForward * m_flGroundSpeed * 0.75 );
+	Vector testHullMins = GetHullMins();
+	testHullMins.z += (StepHeight() * 2);
+	TraceHull_SkipPhysics( GetAbsOrigin(), vecTestPos, testHullMins, GetHullMaxs(), MASK_SHOT_HULL, this, COLLISION_GROUP_NONE, &tr, VPhysicsGetObject()->GetMass() * 0.5 );
+
+	//NDebugOverlay::Box( tr.startpos, testHullMins, GetHullMaxs(), 0, 255, 0, true, 0.1f );
+	//NDebugOverlay::Box( vecTestPos, testHullMins, GetHullMaxs(), 255, 0, 0, true, 0.1f );
+
+	if ( tr.fraction != 1.0 )
+	{
+		// Start playing the hit animation
+		AddGesture( ACT_ANTLIONGUARD_CHARGE_ANTICIPATION );
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Handles the guard charging into something. Returns true if it hit the world.
+//-----------------------------------------------------------------------------
+bool CNPC_AntlionGuard::HandleChargeImpact( Vector vecImpact, CBaseEntity *pEntity )
+{
+	// Cause a shock wave from this point which will disrupt nearby physics objects
+	ImpactShock( vecImpact, 128, 350 );
+
+	// Did we hit anything interesting?
+	if ( !pEntity || pEntity->IsWorld() )
+	{
+		// Robin: Due to some of the finicky details in the motor, the guard will hit
+		//		  the world when it is blocked by our enemy when trying to step up 
+		//		  during a moveprobe. To get around this, we see if the enemy's within
+		//		  a volume in front of the guard when we hit the world, and if he is,
+		//		  we hit him anyway.
+		EnemyIsRightInFrontOfMe( &pEntity );
+
+		// Did we manage to find him? If not, increment our charge miss count and abort.
+		if ( pEntity->IsWorld() )
+		{
+			m_iChargeMisses++;
+			return true;
+		}
+	}
+
+	// Hit anything we don't like
+	if ( IRelationType( pEntity ) == D_HT && ( GetNextAttack() < gpGlobals->curtime ) )
+	{
+		EmitSound( "NPC_AntlionGuard.Shove" );
+
+		if ( !IsPlayingGesture( ACT_ANTLIONGUARD_CHARGE_HIT ) )
+		{
+			RestartGesture( ACT_ANTLIONGUARD_CHARGE_HIT );
+		}
+		
+		ChargeDamage( pEntity );
+		
+		pEntity->ApplyAbsVelocityImpulse( ( BodyDirection2D() * 400 ) + Vector( 0, 0, 200 ) );
+
+		if ( !pEntity->IsAlive() && GetEnemy() == pEntity )
+		{
+			SetEnemy( NULL );
+		}
+
+		SetNextAttack( gpGlobals->curtime + 2.0f );
+		SetActivity( ACT_ANTLIONGUARD_CHARGE_STOP );
+
+		// We've hit something, so clear our miss count
+		m_iChargeMisses = 0;
+		return false;
+	}
+
+	// Hit something we don't hate. If it's not moveable, crash into it.
+	if ( pEntity->GetMoveType() == MOVETYPE_NONE || pEntity->GetMoveType() == MOVETYPE_PUSH )
+		return true;
+
+	// If it's a vphysics object that's too heavy, crash into it too.
+	if ( pEntity->GetMoveType() == MOVETYPE_VPHYSICS )
+	{
+		IPhysicsObject *pPhysics = pEntity->VPhysicsGetObject();
+		if ( pPhysics )
+		{
+			// If the object is being held by the player, knock it out of his hands
+			if ( pPhysics->GetGameFlags() & FVPHYSICS_PLAYER_HELD )
+			{
+				Pickup_ForcePlayerToDropThisObject( pEntity );
+				return false;
+			}
+
+			if ( (!pPhysics->IsMoveable() || pPhysics->GetMass() > VPhysicsGetObject()->GetMass() * 0.5f ) )
+				return true;
+		}
+	}
+
+	return false;
+
+	/*
+	
+	ROBIN: Wrote & then removed this. If we want to have large rocks that the guard
+		   should smack around, then we should enable it.
+
+	else
+	{
+		// If we hit a physics prop, smack the crap out of it. (large rocks)
+		// Factor the object mass into it, because we want to move it no matter how heavy it is.
+		if ( pEntity->GetMoveType() == MOVETYPE_VPHYSICS )
+		{
+			CTakeDamageInfo info( this, this, 250, DMG_BLAST );
+			info.SetDamagePosition( vecImpact );
+			float flForce = ImpulseScale( pEntity->VPhysicsGetObject()->GetMass(), 250 );
+			flForce *= random->RandomFloat( 0.85, 1.15 );
+
+			// Calculate the vector and stuff it into the takedamageinfo
+			Vector vecForce = BodyDirection3D();
+			VectorNormalize( vecForce );
+			vecForce *= flForce;
+			vecForce *= phys_pushscale.GetFloat();
+			info.SetDamageForce( vecForce );
+
+			pEntity->VPhysicsTakeDamage( info );
+		}
+	}
+	*/
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Output : float
+//-----------------------------------------------------------------------------
+float CNPC_AntlionGuard::ChargeSteer( void )
+{
+	trace_t	tr;
+	Vector	testPos, steer, forward, right;
+	QAngle	angles;
+	const float	testLength = m_flGroundSpeed * 0.15f;
+
+	//Get our facing
+	GetVectors( &forward, &right, NULL );
+
+	steer = forward;
+
+	const float faceYaw	= UTIL_VecToYaw( forward );
+
+	//Offset right
+	VectorAngles( forward, angles );
+	angles[YAW] += 45.0f;
+	AngleVectors( angles, &forward );
+
+	//Probe out
+	testPos = GetAbsOrigin() + ( forward * testLength );
+
+	//Offset by step height
+	Vector testHullMins = GetHullMins();
+	testHullMins.z += (StepHeight() * 2);
+
+	//Probe
+	TraceHull_SkipPhysics( GetAbsOrigin(), testPos, testHullMins, GetHullMaxs(), MASK_SOLID_BRUSHONLY, this, COLLISION_GROUP_NONE, &tr, VPhysicsGetObject()->GetMass() * 0.5f );
+
+	//Debug info
+	if ( g_debug_antlionguard.GetInt() == 1 )
+	{
+		if ( tr.fraction == 1.0f )
+		{
+  			NDebugOverlay::BoxDirection( GetAbsOrigin(), testHullMins, GetHullMaxs() + Vector(testLength,0,0), forward, 0, 255, 0, 8, 0.1f );
+   		}
+   		else
+   		{
+  			NDebugOverlay::BoxDirection( GetAbsOrigin(), testHullMins, GetHullMaxs() + Vector(testLength,0,0), forward, 255, 0, 0, 8, 0.1f );
+		}
+	}
+
+	//Add in this component
+	steer += ( right * 0.5f ) * ( 1.0f - tr.fraction );
+
+	//Offset left
+	angles[YAW] -= 90.0f;
+	AngleVectors( angles, &forward );
+
+	//Probe out
+	testPos = GetAbsOrigin() + ( forward * testLength );
+
+	// Probe
+	TraceHull_SkipPhysics( GetAbsOrigin(), testPos, testHullMins, GetHullMaxs(), MASK_SOLID_BRUSHONLY, this, COLLISION_GROUP_NONE, &tr, VPhysicsGetObject()->GetMass() * 0.5f );
+
+	//Debug
+	if ( g_debug_antlionguard.GetInt() == 1 )
+	{
+		if ( tr.fraction == 1.0f )
+		{
+			NDebugOverlay::BoxDirection( GetAbsOrigin(), testHullMins, GetHullMaxs() + Vector(testLength,0,0), forward, 0, 255, 0, 8, 0.1f );
+		}
+		else
+		{
+			NDebugOverlay::BoxDirection( GetAbsOrigin(), testHullMins, GetHullMaxs() + Vector(testLength,0,0), forward, 255, 0, 0, 8, 0.1f );
+		}
+	}
+
+	//Add in this component
+	steer -= ( right * 0.5f ) * ( 1.0f - tr.fraction );
+
+	//Debug
+	if ( g_debug_antlionguard.GetInt() == 1 )
+	{
+		NDebugOverlay::Line( GetAbsOrigin(), GetAbsOrigin() + ( steer * 512.0f ), 255, 255, 0, true, 0.1f );
+		NDebugOverlay::Cross3D( GetAbsOrigin() + ( steer * 512.0f ), Vector(2,2,2), -Vector(2,2,2), 255, 255, 0, true, 0.1f );
+
+		NDebugOverlay::Line( GetAbsOrigin(), GetAbsOrigin() + ( BodyDirection3D() * 256.0f ), 255, 0, 255, true, 0.1f );
+		NDebugOverlay::Cross3D( GetAbsOrigin() + ( BodyDirection3D() * 256.0f ), Vector(2,2,2), -Vector(2,2,2), 255, 0, 255, true, 0.1f );
+	}
+
+	return UTIL_AngleDiff( UTIL_VecToYaw( steer ), faceYaw );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *pTask - 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::RunTask( const Task_t *pTask )
+{
+	switch (pTask->iTask)
+	{
+	case TASK_ANTLIONGUARD_SET_FLINCH_ACTIVITY:
+		
+		AutoMovement( );
+		
+		if ( IsActivityFinished() )
+		{
+			TaskComplete();
+		}
+		break;
+
+	case TASK_ANTLIONGUARD_SHOVE_PHYSOBJECT:
+	
+		if ( IsActivityFinished() )
+		{
+			TaskComplete();
+		}
+
+		break;
+
+		/*
+	case TASK_RUN_PATH:
+		{
+
+
+		}
+		break;
+		*/
+
+	case TASK_ANTLIONGUARD_CHARGE:
+		{
+			Activity eActivity = GetActivity();
+
+			// See if we're trying to stop after hitting/missing our target
+			if ( eActivity == ACT_ANTLIONGUARD_CHARGE_STOP || eActivity == ACT_ANTLIONGUARD_CHARGE_CRASH ) 
+			{
+				if ( IsActivityFinished() )
+				{
+					TaskComplete();
+					return;
+				}
+
+				// Still in the process of slowing down. Run movement until it's done.
+				AutoMovement();
+				return;
+			}
+
+			// Check for manual transition
+			if ( ( eActivity == ACT_ANTLIONGUARD_CHARGE_START ) && ( IsActivityFinished() ) )
+			{
+				SetActivity( ACT_ANTLIONGUARD_CHARGE_RUN );
+			}
+
+			// See if we're still running
+			if ( eActivity == ACT_ANTLIONGUARD_CHARGE_RUN || eActivity == ACT_ANTLIONGUARD_CHARGE_START ) 
+			{
+				if ( HasCondition( COND_NEW_ENEMY ) || HasCondition( COND_LOST_ENEMY ) || HasCondition( COND_ENEMY_DEAD ) )
+				{
+					SetActivity( ACT_ANTLIONGUARD_CHARGE_STOP );
+					return;
+				}
+				else 
+				{
+					if ( GetEnemy() != NULL )
+					{
+						Vector	goalDir = ( GetEnemy()->GetAbsOrigin() - GetAbsOrigin() );
+						VectorNormalize( goalDir );
+
+						if ( DotProduct( BodyDirection2D(), goalDir ) < 0.25f )
+						{
+							if ( !m_bDecidedNotToStop )
+							{
+								// We've missed the target. Randomly decide not to stop, which will cause
+								// the guard to just try and swing around for another pass.
+								m_bDecidedNotToStop = true;
+								if ( RandomFloat(0,1) > 0.3 )
+								{
+									m_iChargeMisses++;
+									SetActivity( ACT_ANTLIONGUARD_CHARGE_STOP );
+								}
+							}
+						}
+						else
+						{
+							m_bDecidedNotToStop = false;
+						}
+					}
+				}
+			}
+
+			// Steer towards our target
+			float idealYaw;
+			if ( GetEnemy() == NULL )
+			{
+				idealYaw = GetMotor()->GetIdealYaw();
+			}
+			else
+			{
+				idealYaw = CalcIdealYaw( GetEnemy()->GetAbsOrigin() );
+			}
+
+			// Add in our steering offset
+			idealYaw += ChargeSteer();
+			
+			// Turn to face
+			GetMotor()->SetIdealYawAndUpdate( idealYaw );
+
+			// See if we're going to run into anything soon
+			ChargeLookAhead();
+
+			// Let our animations simply move us forward. Keep the result
+			// of the movement so we know whether we've hit our target.
+			AIMoveTrace_t moveTrace;
+			if ( AutoMovement( GetEnemy(), &moveTrace ) == false )
+			{
+				// Only stop if we hit the world
+				if ( HandleChargeImpact( moveTrace.vEndPosition, moveTrace.pObstruction ) )
+				{
+					// If we're starting up, this is an error
+					if ( eActivity == ACT_ANTLIONGUARD_CHARGE_START )
+					{
+						TaskFail( "Unable to make initial movement of charge\n" );
+						return;
+					}
+
+					// Crash unless we're trying to stop already
+					if ( eActivity != ACT_ANTLIONGUARD_CHARGE_STOP )
+					{
+						if ( moveTrace.fStatus == AIMR_BLOCKED_WORLD && moveTrace.vHitNormal == vec3_origin )
+						{
+							SetActivity( ACT_ANTLIONGUARD_CHARGE_STOP );
+						}
+						else
+						{
+							SetActivity( ACT_ANTLIONGUARD_CHARGE_CRASH );
+						}
+					}
+				}
+				else if ( moveTrace.pObstruction )
+				{
+					// If we hit an antlion, don't stop, but kill it
+					if ( moveTrace.pObstruction->Classify() == CLASS_ANTLION )
+					{
+						if ( FClassnameIs( moveTrace.pObstruction, "npc_antlionguard" ) )
+						{
+							// Crash unless we're trying to stop already
+							if ( eActivity != ACT_ANTLIONGUARD_CHARGE_STOP )
+							{
+								SetActivity( ACT_ANTLIONGUARD_CHARGE_STOP );
+							}
+						}
+						else
+						{
+							ApplyChargeDamage( this, moveTrace.pObstruction, moveTrace.pObstruction->GetHealth() );
+						}
+					}
+				}
+			}
+		}
+		break;
+
+	case TASK_WAIT_FOR_MOVEMENT:
+	{
+		// the cavern antlion can clothesline gordon
+		if ( m_bInCavern )
+		{
+
+			// See if we're going to run into anything soon
+			ChargeLookAhead();
+
+			if ( HasCondition(COND_CAN_MELEE_ATTACK1) )
+			{
+
+
+				CBaseEntity *pEntity = GetEnemy();
+
+				if (pEntity && pEntity->IsPlayer())
+				{
+					EmitSound( "NPC_AntlionGuard.Shove" );
+
+					if ( !IsPlayingGesture( ACT_ANTLIONGUARD_CHARGE_HIT ) )
+					{
+						RestartGesture( ACT_ANTLIONGUARD_CHARGE_HIT );
+					}
+					
+					ChargeDamage( pEntity );
+					
+					pEntity->ApplyAbsVelocityImpulse( ( BodyDirection2D() * 400 ) + Vector( 0, 0, 200 ) );
+
+					if ( !pEntity->IsAlive() && GetEnemy() == pEntity )
+					{
+						SetEnemy( NULL );
+					}
+
+					SetNextAttack( gpGlobals->curtime + 2.0f );
+					SetActivity( ACT_ANTLIONGUARD_CHARGE_STOP );
+
+					// We've hit something, so clear our miss count
+					m_iChargeMisses = 0;
+
+					AutoMovement();
+					TaskComplete();
+					return;
+				}
+			}
+		}
+
+		BaseClass::RunTask( pTask );
+
+	}
+	break;
+
+	default:
+		BaseClass::RunTask(pTask);
+		break;
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Summon antlions around the guard
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::SummonAntlions( void )
+{
+	// We want to spawn them around the guard
+	Vector vecForward, vecRight;
+	AngleVectors( QAngle(0,GetAbsAngles().y,0), &vecForward, &vecRight, NULL );
+
+	// Spawn positions
+	struct spawnpos_t
+	{
+		float flForward;
+		float flRight;
+	};
+
+	spawnpos_t sAntlionSpawnPositions[] =
+	{
+		{ 0, 200 },
+		{ 0, -200 },
+		{ 128, 128 },
+		{ 128, -128 },
+		{ -128, 128 },
+		{ -128, -128 },
+		{ 200, 0 },
+		{ -200, 0 },
+	};
+
+	// Only spawn up to our max count
+	int iSpawnPoint = 0;
+	for ( int i = 0; (m_iNumLiveAntlions < ANTLIONGUARD_SUMMON_COUNT) && (iSpawnPoint < ARRAYSIZE(sAntlionSpawnPositions)); i++ )
+	{
+		// Determine spawn position for the antlion
+		Vector vecSpawn = GetAbsOrigin() + ( sAntlionSpawnPositions[iSpawnPoint].flForward * vecForward ) + ( sAntlionSpawnPositions[iSpawnPoint].flRight * vecRight );
+		iSpawnPoint++;
+		// Randomise it a little
+		vecSpawn.x += RandomFloat( -64, 64 );
+		vecSpawn.y += RandomFloat( -64, 64 );
+		vecSpawn.z += 64;
+
+		// Make sure it's clear, and make sure we hit something
+		trace_t	tr;
+		UTIL_TraceHull( vecSpawn, vecSpawn - Vector(0,0,128), NAI_Hull::Mins( HULL_MEDIUM ), NAI_Hull::Maxs( HULL_MEDIUM ), MASK_NPCSOLID, NULL, COLLISION_GROUP_NONE, &tr );
+		if ( tr.startsolid || tr.allsolid || tr.fraction == 1.0 )
+		{
+			if ( g_debug_antlionguard.GetInt() == 2 )
+			{
+				NDebugOverlay::Box( tr.endpos, NAI_Hull::Mins( HULL_MEDIUM ), NAI_Hull::Maxs( HULL_MEDIUM ), 255, 0, 0, true, 5.0f );
+			}
+			continue;
+		}
+
+		// Ensure it's dirt or sand
+		const surfacedata_t *pdata = physprops->GetSurfaceData( tr.surface.surfaceProps );
+		if ( ( pdata->game.material != CHAR_TEX_DIRT ) && ( pdata->game.material != CHAR_TEX_SAND ) )
+		{
+			if ( g_debug_antlionguard.GetInt() == 2 )
+			{
+				NDebugOverlay::Box( tr.endpos, NAI_Hull::Mins( HULL_MEDIUM ), NAI_Hull::Maxs( HULL_MEDIUM ), 255, 128, 128, true, 5.0f );
+			}
+			continue;
+		}
+
+		// Make sure the guard can see it
+		trace_t	tr_vis;
+		UTIL_TraceLine( WorldSpaceCenter(), tr.endpos, MASK_NPCSOLID, this, COLLISION_GROUP_NONE, &tr_vis );
+		if ( tr_vis.fraction != 1.0 )
+		{
+			if ( g_debug_antlionguard.GetInt() == 2 )
+			{
+				NDebugOverlay::Line( WorldSpaceCenter(), tr.endpos, 255, 0, 0, true, 5.0f );
+			}
+			continue;
+		}
+
+		CAI_BaseNPC	*pent = (CAI_BaseNPC*)CreateEntityByName( "npc_antlion" );
+		if ( !pent )
+			break;
+
+		CNPC_Antlion *pAntlion = assert_cast<CNPC_Antlion*>(pent);
+
+		if ( g_debug_antlionguard.GetInt() == 2 )
+		{
+			NDebugOverlay::Box( tr.endpos, NAI_Hull::Mins( HULL_MEDIUM ), NAI_Hull::Maxs( HULL_MEDIUM ), 0, 255, 0, true, 5.0f );
+			NDebugOverlay::Line( WorldSpaceCenter(), tr.endpos, 0, 255, 0, true, 5.0f );
+		}
+
+		vecSpawn = tr.endpos;
+		pAntlion->SetAbsOrigin( vecSpawn );
+
+		// Start facing our enemy if we have one, otherwise just match the guard.
+		Vector vecFacing = vecForward;
+		if ( GetEnemy() )
+		{
+			vecFacing = GetEnemy()->GetAbsOrigin() - GetAbsOrigin();
+			VectorNormalize( vecFacing );
+		}
+		QAngle vecAngles;
+		VectorAngles( vecFacing, vecAngles );
+		pAntlion->SetAbsAngles( vecAngles );
+
+		pAntlion->AddSpawnFlags( SF_NPC_FALL_TO_GROUND );
+		pAntlion->AddSpawnFlags( SF_NPC_FADE_CORPSE );
+
+		// Make the antlion fire my input when he dies
+		pAntlion->KeyValue( "OnDeath", UTIL_VarArgs("%s,SummonedAntlionDied,,0,-1", STRING(GetEntityName())) );
+
+		// Start the antlion burrowed, and tell him to come up
+		pAntlion->m_bStartBurrowed = true;
+		DispatchSpawn( pAntlion );
+		pAntlion->Activate();
+		g_EventQueue.AddEvent( pAntlion, "Unburrow", RandomFloat(0.1, 1.0), this, this );
+
+		// Add it to our squad
+		if ( GetSquad() != NULL )
+		{
+			GetSquad()->AddToSquad( pAntlion );
+		}
+
+		// Set the antlion's enemy to our enemy
+		if ( GetEnemy() )
+		{
+			pAntlion->SetEnemy( GetEnemy() );
+			pAntlion->SetState( NPC_STATE_COMBAT );
+			pAntlion->UpdateEnemyMemory( GetEnemy(), GetEnemy()->GetAbsOrigin() );
+		}
+
+		m_iNumLiveAntlions++;
+	}
+
+	if ( g_debug_antlionguard.GetInt() == 2 )
+	{
+		Msg("Guard summoned antlion count: %d\n", m_iNumLiveAntlions );
+	}
+
+	if ( m_iNumLiveAntlions > 2 )
+	{
+		m_flNextSummonTime = gpGlobals->curtime + RandomFloat( 15,20 );
+	}
+	else
+	{
+		m_flNextSummonTime = gpGlobals->curtime + RandomFloat( 10,15 );
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::FoundEnemy( void )
+{
+	m_flAngerNoiseTime = gpGlobals->curtime + 2.0f;
+	SetState( NPC_STATE_COMBAT );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::LostEnemy( void )
+{
+	m_flSearchNoiseTime = gpGlobals->curtime + 2.0f;
+	SetState( NPC_STATE_ALERT );
+
+	m_OnLostPlayer.FireOutput( this, this );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::InputSetShoveTarget( inputdata_t &inputdata )
+{
+	if ( IsAlive() == false )
+		return;
+
+	CBaseEntity *pTarget = gEntList.FindEntityByName( NULL, inputdata.value.String(), NULL, inputdata.pActivator, inputdata.pCaller );
+
+	if ( pTarget == NULL )
+	{
+		Warning( "**Guard %s cannot find shove target %s\n", GetClassname(), inputdata.value.String() );
+		m_hShoveTarget = NULL;
+		return;
+	}
+
+	m_hShoveTarget = pTarget;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::InputSetChargeTarget( inputdata_t &inputdata )
+{
+	if ( !IsAlive() )
+		return;
+
+	// Pull the target & position out of the string
+	char parseString[255];
+	Q_strncpy(parseString, inputdata.value.String(), sizeof(parseString));
+
+	// Get charge target name
+	char *pszParam = strtok(parseString," ");
+	CBaseEntity *pTarget = gEntList.FindEntityByName( NULL, pszParam, NULL, inputdata.pActivator, inputdata.pCaller );
+	if ( !pTarget )
+	{
+		Warning( "ERROR: Guard %s cannot find charge target '%s'\n", STRING(GetEntityName()), pszParam );
+		return;
+	}
+
+	// Get the charge position name
+	pszParam = strtok(NULL," ");
+	CBaseEntity *pPosition = gEntList.FindEntityByName( NULL, pszParam, NULL, inputdata.pActivator, inputdata.pCaller );
+	if ( !pPosition )
+	{
+		Warning( "ERROR: Guard %s cannot find charge position '%s'\nMake sure you've specified the parameters as [target start]!\n", STRING(GetEntityName()), pszParam );
+		return;
+	}
+
+	// Make sure we don't stack charge targets
+	if ( m_hChargeTarget )
+	{
+		if ( GetEnemy() == m_hChargeTarget )
+		{
+			SetEnemy( NULL );
+		}
+	}
+
+	SetCondition( COND_ANTLIONGUARD_HAS_CHARGE_TARGET );
+	m_hChargeTarget = pTarget;
+	m_hChargeTargetPosition = pPosition;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : &inputdata - 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::InputClearChargeTarget( inputdata_t &inputdata )
+{
+	m_hChargeTarget = NULL;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : baseAct - 
+// Output : Activity
+//-----------------------------------------------------------------------------
+Activity CNPC_AntlionGuard::NPC_TranslateActivity( Activity baseAct )
+{
+	//See which run to use
+	if ( ( baseAct == ACT_RUN ) && IsCurSchedule( SCHED_ANTLIONGUARD_CHARGE ) )
+		return (Activity) ACT_ANTLIONGUARD_CHARGE_RUN;
+
+	// Do extra code if we're trying to close on an enemy in a confined space (unless scripted)
+	if ( hl2_episodic.GetBool() && m_bInCavern && baseAct == ACT_RUN && IsInAScript() == false )
+		return (Activity) ACT_ANTLIONGUARD_CHARGE_RUN;
+
+	if ( ( baseAct == ACT_RUN ) && ( m_iHealth <= (m_iMaxHealth/4) ) )
+		return (Activity) ACT_ANTLIONGUARD_RUN_HURT;
+
+	return baseAct;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+bool CNPC_AntlionGuard::ShouldWatchEnemy( void )
+{
+	Activity nActivity = GetActivity();
+
+	if ( ( nActivity == ACT_ANTLIONGUARD_SEARCH ) || 
+		 ( nActivity == ACT_ANTLIONGUARD_PEEK_ENTER ) || 
+		 ( nActivity == ACT_ANTLIONGUARD_PEEK_EXIT ) || 
+		 ( nActivity == ACT_ANTLIONGUARD_PEEK1 ) || 
+		 ( nActivity == ACT_ANTLIONGUARD_PEEK_SIGHTED ) || 
+		 ( nActivity == ACT_ANTLIONGUARD_SHOVE_PHYSOBJECT ) || 
+		 ( nActivity == ACT_ANTLIONGUARD_PHYSHIT_FR ) || 
+		 ( nActivity == ACT_ANTLIONGUARD_PHYSHIT_FL ) || 
+		 ( nActivity == ACT_ANTLIONGUARD_PHYSHIT_RR ) || 
+		 ( nActivity == ACT_ANTLIONGUARD_PHYSHIT_RL ) || 
+		 ( nActivity == ACT_ANTLIONGUARD_CHARGE_CRASH ) || 
+		 ( nActivity == ACT_ANTLIONGUARD_CHARGE_HIT ) ||
+		 ( nActivity == ACT_ANTLIONGUARD_CHARGE_ANTICIPATION ) )
+	{
+		return false;
+	}
+
+	return true;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::UpdateHead( void )
+{
+	float yaw = GetPoseParameter( m_poseHead_Yaw );
+	float pitch = GetPoseParameter( m_poseHead_Pitch );
+
+	// If we should be watching our enemy, turn our head
+	if ( ShouldWatchEnemy() && ( GetEnemy() != NULL ) )
+	{
+		Vector	enemyDir = GetEnemy()->WorldSpaceCenter() - WorldSpaceCenter();
+		VectorNormalize( enemyDir );
+		
+		float angle = VecToYaw( BodyDirection3D() );
+		float angleDiff = VecToYaw( enemyDir );
+		angleDiff = UTIL_AngleDiff( angleDiff, angle + yaw );
+
+		SetPoseParameter( m_poseHead_Yaw, UTIL_Approach( yaw + angleDiff, yaw, 50 ) );
+
+		angle = UTIL_VecToPitch( BodyDirection3D() );
+		angleDiff = UTIL_VecToPitch( enemyDir );
+		angleDiff = UTIL_AngleDiff( angleDiff, angle + pitch );
+
+		SetPoseParameter( m_poseHead_Pitch, UTIL_Approach( pitch + angleDiff, pitch, 50 ) );
+	}
+	else
+	{
+		// Otherwise turn the head back to its normal position
+		SetPoseParameter( m_poseHead_Yaw,	UTIL_Approach( 0, yaw, 10 ) );
+		SetPoseParameter( m_poseHead_Pitch, UTIL_Approach( 0, pitch, 10 ) );
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::MaintainPhysicsTarget( void )
+{
+	if ( m_hPhysicsTarget == NULL || GetEnemy() == NULL )
+		return;
+
+	// Update our current target to make sure it's still valid
+	float flTargetDistSqr = ( m_hPhysicsTarget->WorldSpaceCenter() - m_vecPhysicsTargetStartPos ).LengthSqr();
+	bool bTargetMoved = ( flTargetDistSqr > Square(30*12.0f) );
+	bool bEnemyCloser = ( ( GetEnemy()->GetAbsOrigin() - GetAbsOrigin() ).LengthSqr() <= flTargetDistSqr );
+
+	// Make sure this hasn't moved too far or that the player is now closer
+	if ( bTargetMoved || bEnemyCloser )
+	{
+		ClearCondition( COND_ANTLIONGUARD_PHYSICS_TARGET );
+		SetCondition( COND_ANTLIONGUARD_PHYSICS_TARGET_INVALID );
+		m_hPhysicsTarget = NULL;
+		return;
+	}
+	else
+	{
+		SetCondition( COND_ANTLIONGUARD_PHYSICS_TARGET );
+		ClearCondition( COND_ANTLIONGUARD_PHYSICS_TARGET_INVALID );
+	}
+
+	if ( g_debug_antlionguard.GetInt() == 3 )
+	{
+		NDebugOverlay::Cross3D( m_hPhysicsTarget->WorldSpaceCenter(), -Vector(32,32,32), Vector(32,32,32), 255, 255, 255, true, 1.0f );
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::UpdatePhysicsTarget( bool bPreferObjectsAlongTargetVector, float flRadius )
+{
+	if ( GetEnemy() == NULL )
+		return;
+
+	// Already have a target, don't bother looking
+	if ( m_hPhysicsTarget != NULL )
+		return;
+
+	// Too soon to check again
+	if ( m_flPhysicsCheckTime > gpGlobals->curtime )
+		return;
+
+	// Attempt to find a valid shove target
+	PhysicsObjectCriteria_t criteria;
+	criteria.pTarget = GetEnemy();
+	criteria.vecCenter = GetEnemy()->GetAbsOrigin();
+	criteria.flRadius = flRadius;
+	criteria.flTargetCone = ANTLIONGUARD_OBJECTFINDING_FOV;
+	criteria.bPreferObjectsAlongTargetVector = bPreferObjectsAlongTargetVector;
+	criteria.flNearRadius = (20*12); // TODO: It may preferable to disable this for legacy products as well -- jdw
+
+	m_hPhysicsTarget = FindPhysicsObjectTarget( criteria );
+		
+	// Found one, so interrupt us if we care
+	if ( m_hPhysicsTarget != NULL )
+	{
+		SetCondition( COND_ANTLIONGUARD_PHYSICS_TARGET );
+		m_vecPhysicsTargetStartPos = m_hPhysicsTarget->WorldSpaceCenter();
+	}
+
+	// Don't search again for another second
+	m_flPhysicsCheckTime = gpGlobals->curtime + 1.0f;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Let the probe know I can run through small debris
+//-----------------------------------------------------------------------------
+bool CNPC_AntlionGuard::ShouldProbeCollideAgainstEntity( CBaseEntity *pEntity )
+{
+	if ( m_iszPhysicsPropClass != pEntity->m_iClassname )
+		return BaseClass::ShouldProbeCollideAgainstEntity( pEntity );
+
+	if ( m_hPhysicsTarget == pEntity )
+		return false;
+
+	if ( pEntity->GetMoveType() == MOVETYPE_VPHYSICS )
+	{
+		IPhysicsObject *pPhysObj = pEntity->VPhysicsGetObject();
+
+		if( pPhysObj && pPhysObj->GetMass() <= ANTLIONGUARD_MAX_OBJECT_MASS )
+		{
+			return false;
+		}
+	}
+
+	return BaseClass::ShouldProbeCollideAgainstEntity( pEntity );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::PrescheduleThink( void )
+{
+	BaseClass::PrescheduleThink();
+
+	// Don't do anything after death
+	if ( m_NPCState == NPC_STATE_DEAD )
+		return;
+
+	// If we're burrowed, then don't do any of this
+	if ( m_bIsBurrowed )
+		return;
+
+	// Automatically update our physics target when chasing enemies
+	if ( IsCurSchedule( SCHED_ANTLIONGUARD_CHASE_ENEMY ) || 
+		 IsCurSchedule( SCHED_ANTLIONGUARD_PATROL_RUN ) ||
+		 IsCurSchedule( SCHED_ANTLIONGUARD_CANT_ATTACK ) ||
+		 IsCurSchedule( SCHED_ANTLIONGUARD_CHASE_ENEMY_TOLERANCE ) )
+	{
+		bool bCheckAlongLine = ( IsCurSchedule( SCHED_ANTLIONGUARD_CHASE_ENEMY ) || IsCurSchedule( SCHED_ANTLIONGUARD_CHASE_ENEMY_TOLERANCE ) );
+		UpdatePhysicsTarget( bCheckAlongLine );
+	}
+	else if ( !IsCurSchedule( SCHED_ANTLIONGUARD_PHYSICS_ATTACK ) )
+	{
+		ClearCondition( COND_ANTLIONGUARD_PHYSICS_TARGET );
+		m_hPhysicsTarget = NULL;
+	}
+
+	UpdateHead();
+
+	if ( ( m_flGroundSpeed <= 0.0f ) )
+	{
+		if ( m_bStopped == false )
+		{
+			StartSounds();
+
+			float duration = random->RandomFloat( 2.0f, 8.0f );
+
+			ENVELOPE_CONTROLLER.SoundChangeVolume( m_pBreathSound, 0.0f, duration );
+			ENVELOPE_CONTROLLER.SoundChangePitch( m_pBreathSound, random->RandomInt( 40, 60 ), duration );
+			
+			ENVELOPE_CONTROLLER.SoundChangeVolume( m_pGrowlIdleSound, 0.0f, duration );
+			ENVELOPE_CONTROLLER.SoundChangePitch( m_pGrowlIdleSound, random->RandomInt( 120, 140 ), duration );
+
+			m_flBreathTime = gpGlobals->curtime + duration - (duration*0.75f);
+		}
+		
+		m_bStopped = true;
+
+		if ( m_flBreathTime < gpGlobals->curtime )
+		{
+			StartSounds();
+
+			ENVELOPE_CONTROLLER.SoundChangeVolume( m_pGrowlIdleSound, random->RandomFloat( 0.2f, 0.3f ), random->RandomFloat( 0.5f, 1.0f ) );
+			ENVELOPE_CONTROLLER.SoundChangePitch( m_pGrowlIdleSound, random->RandomInt( 80, 120 ), random->RandomFloat( 0.5f, 1.0f ) );
+
+			m_flBreathTime = gpGlobals->curtime + random->RandomFloat( 1.0f, 8.0f );
+		}
+	}
+	else
+	{
+		if ( m_bStopped ) 
+		{
+			StartSounds();
+
+			ENVELOPE_CONTROLLER.SoundChangeVolume( m_pBreathSound, 0.6f, random->RandomFloat( 2.0f, 4.0f ) );
+			ENVELOPE_CONTROLLER.SoundChangePitch( m_pBreathSound, random->RandomInt( 140, 160 ), random->RandomFloat( 2.0f, 4.0f ) );
+
+			ENVELOPE_CONTROLLER.SoundChangeVolume( m_pGrowlIdleSound, 0.0f, 1.0f );
+			ENVELOPE_CONTROLLER.SoundChangePitch( m_pGrowlIdleSound, random->RandomInt( 90, 110 ), 0.2f );
+		}
+
+
+		m_bStopped = false;
+	}
+
+	// Put danger sounds out in front of us
+	for ( int i = 0; i < 3; i++ )
+	{
+		CSoundEnt::InsertSound( SOUND_DANGER, WorldSpaceCenter() + ( BodyDirection3D() * 128 * (i+1) ), 128, 0.1f, this );		
+	}
+
+#if ANTLIONGUARD_BLOOD_EFFECTS
+	// compute and if necessary transmit the bleeding level for the particle effect
+	m_iBleedingLevel = GetBleedingLevel();
+#endif
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::GatherConditions( void )
+{
+	BaseClass::GatherConditions();
+
+	if ( CanSummon(false) )
+	{
+		SetCondition( COND_ANTLIONGUARD_CAN_SUMMON );
+	}
+	else
+	{
+		ClearCondition( COND_ANTLIONGUARD_CAN_SUMMON );
+	}
+
+	// Make sure our physics target is still valid
+	MaintainPhysicsTarget();
+
+	if( IsCurSchedule(SCHED_ANTLIONGUARD_PHYSICS_ATTACK) )
+	{
+		if( gpGlobals->curtime > m_flWaitFinished )
+		{
+			ClearCondition( COND_ANTLIONGUARD_PHYSICS_TARGET );
+			SetCondition( COND_ANTLIONGUARD_PHYSICS_TARGET_INVALID );
+			m_hPhysicsTarget = NULL;
+		}
+	}
+
+	// See if we can charge the target
+	if ( GetEnemy() )
+	{
+		if ( ShouldCharge( GetAbsOrigin(), GetEnemy()->GetAbsOrigin(), true, false ) )
+		{
+			SetCondition( COND_ANTLIONGUARD_CAN_CHARGE );
+		}
+		else
+		{
+			ClearCondition( COND_ANTLIONGUARD_CAN_CHARGE );
+		}
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::StopLoopingSounds()
+{
+	//Stop all sounds
+	ENVELOPE_CONTROLLER.SoundDestroy( m_pGrowlHighSound );
+	ENVELOPE_CONTROLLER.SoundDestroy( m_pGrowlIdleSound );
+	ENVELOPE_CONTROLLER.SoundDestroy( m_pBreathSound );
+	ENVELOPE_CONTROLLER.SoundDestroy( m_pConfusedSound );
+	
+	
+	m_pGrowlHighSound	= NULL;
+	m_pGrowlIdleSound	= NULL;
+	m_pBreathSound		= NULL;
+	m_pConfusedSound	= NULL;
+
+	BaseClass::StopLoopingSounds();
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : &inputdata - 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::InputUnburrow( inputdata_t &inputdata )
+{
+	if ( IsAlive() == false )
+		return;
+
+	if ( m_bIsBurrowed == false )
+		return;
+
+	m_spawnflags &= ~SF_NPC_GAG;
+	
+	RemoveSolidFlags( FSOLID_NOT_SOLID );
+	AddSolidFlags( FSOLID_NOT_STANDABLE );
+	
+	m_takedamage = DAMAGE_YES;
+
+	SetSchedule( SCHED_ANTLIONGUARD_UNBURROW );
+
+	m_bIsBurrowed = false;
+}
+
+//------------------------------------------------------------------------------
+// Purpose : Returns true is entity was remembered as unreachable.
+//			 After a time delay reachability is checked
+// Input   :
+// Output  :
+//------------------------------------------------------------------------------
+bool CNPC_AntlionGuard::IsUnreachable(CBaseEntity *pEntity)
+{
+	float UNREACHABLE_DIST_TOLERANCE_SQ = (240 * 240);
+
+	// Note that it's ok to remove elements while I'm iterating
+	// as long as I iterate backwards and remove them using FastRemove
+	for (int i=m_UnreachableEnts.Size()-1;i>=0;i--)
+	{
+		// Remove any dead elements
+		if (m_UnreachableEnts[i].hUnreachableEnt == NULL)
+		{
+			m_UnreachableEnts.FastRemove(i);
+		}
+		else if (pEntity == m_UnreachableEnts[i].hUnreachableEnt)
+		{
+			// Test for reachability on any elements that have timed out
+			if ( gpGlobals->curtime > m_UnreachableEnts[i].fExpireTime ||
+				pEntity->GetAbsOrigin().DistToSqr(m_UnreachableEnts[i].vLocationWhenUnreachable) > UNREACHABLE_DIST_TOLERANCE_SQ)
+			{
+				m_UnreachableEnts.FastRemove(i);
+				return false;
+			}
+			return true;
+		}
+	}
+	return false;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Return the point at which the guard wants to stand on to knock the physics object at the target entity
+// Input  : *pObject - Object to be shoved.
+//			*pTarget - Target to be shoved at.
+//			*vecTrajectory - Trajectory to our target
+//			*flClearDistance - Distance behind the entity we're clear to use
+// Output : Position at which to attempt to strike the object
+//-----------------------------------------------------------------------------
+Vector CNPC_AntlionGuard::GetPhysicsHitPosition( CBaseEntity *pObject, CBaseEntity *pTarget, Vector *vecTrajectory, float *flClearDistance )
+{
+	// Get the trajectory we want to knock the object along
+	Vector vecToTarget = pTarget->WorldSpaceCenter() - pObject->WorldSpaceCenter();
+	VectorNormalize( vecToTarget );
+	vecToTarget.z = 0;
+
+	// Get the distance we want to be from the object when we hit it
+	IPhysicsObject *pPhys = pObject->VPhysicsGetObject();
+	Vector extent = physcollision->CollideGetExtent( pPhys->GetCollide(), pObject->GetAbsOrigin(), pObject->GetAbsAngles(), -vecToTarget );
+	float flDist = ( extent - pObject->WorldSpaceCenter() ).Length() + CollisionProp()->BoundingRadius() + 32.0f;
+	
+	if ( vecTrajectory != NULL )
+	{
+		*vecTrajectory = vecToTarget;
+	}
+
+	if ( flClearDistance != NULL )
+	{
+		*flClearDistance = flDist;
+	}
+
+	// Position at which we'd like to be
+	return (pObject->WorldSpaceCenter() + ( vecToTarget * -flDist ));
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: See if we're able to stand on the ground at this point
+// Input  : &vecPos - Position to try
+//			*pOut - Result position (only valid if we return true)
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+inline bool CNPC_AntlionGuard::CanStandAtPoint( const Vector &vecPos, Vector *pOut )
+{
+	Vector vecStart = vecPos + Vector( 0, 0, (4*12) );
+	Vector vecEnd = vecPos - Vector( 0, 0, (4*12) );
+	trace_t	tr;
+	bool bTraceCleared = false;
+
+	// Start high and try to go lower, looking for the ground between here and there
+	// We do this first because it's more likely to succeed in the typical guard arenas (with open terrain)
+	UTIL_TraceHull( vecStart, vecEnd, GetHullMins(), GetHullMaxs(), MASK_NPCSOLID, this, COLLISION_GROUP_NONE, &tr );
+	if ( tr.startsolid && !tr.allsolid )
+	{
+		// We started in solid but didn't end up there, see if we can stand where we ended up
+		UTIL_TraceHull( tr.endpos, tr.endpos, GetHullMins(), GetHullMaxs(), MASK_NPCSOLID, this, COLLISION_GROUP_NONE, &tr );
+		
+		// Must not be in solid
+		bTraceCleared = ( !tr.allsolid && !tr.startsolid );
+	}
+	else
+	{
+		// Must not be in solid and must have found a floor (otherwise we're potentially hanging over a ledge)
+		bTraceCleared = ( tr.allsolid == false && tr.fraction < 1.0f );
+	}
+
+	// Either we're clear or we're still unlucky
+	if ( bTraceCleared == false )
+	{
+		if ( g_debug_antlionguard.GetInt() == 3 )
+		{
+			NDebugOverlay::Box( vecPos, GetHullMins(), GetHullMaxs(), 255, 0, 0, 0, 15.0f );
+		}
+		return false;
+	}
+
+	if ( pOut )
+	{
+		*pOut = tr.endpos;
+	}
+
+	if ( g_debug_antlionguard.GetInt() == 3 )
+	{
+		NDebugOverlay::Box( (*pOut), GetHullMins(), GetHullMaxs(), 0, 255, 0, 0, 15.0f );
+	}
+
+	return true;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Determines whether or not the guard can stand in a position to strike a specified object
+// Input  : *pShoveObject - Object being shoved
+//			*pTarget - Target we're shoving the object at
+//			*pOut - The position we decide to stand at
+// Output : Returns true if the guard can stand and deliver.
+//-----------------------------------------------------------------------------
+bool CNPC_AntlionGuard::CanStandAtShoveTarget( CBaseEntity *pShoveObject, CBaseEntity *pTarget, Vector *pOut )
+{
+	// Get the position we want to be at to swing at the object
+	float flClearDistance;
+	Vector vecTrajectory;
+	Vector vecHitPosition = GetPhysicsHitPosition( pShoveObject, pTarget, &vecTrajectory, &flClearDistance );
+	Vector vecStandPosition;
+
+	if ( g_debug_antlionguard.GetInt() == 3 )
+	{
+		NDebugOverlay::HorzArrow( pShoveObject->WorldSpaceCenter(), pShoveObject->WorldSpaceCenter() + vecTrajectory * 64.0f, 16.0f, 255, 255, 0, 16, true, 15.0f );
+	}
+
+	// If we failed, try around the sides
+	if ( CanStandAtPoint( vecHitPosition, &vecStandPosition ) == false )
+	{
+		// Get the angle (in reverse) to the target
+		float flRad = atan2( -vecTrajectory.y, -vecTrajectory.x );
+		float flRadOffset = DEG2RAD( 45.0f );
+
+		// Build an offset vector, rotating around the base
+		Vector vecSkewTrajectory;
+		SinCos( flRad + flRadOffset, &vecSkewTrajectory.y, &vecSkewTrajectory.x );
+		vecSkewTrajectory.z = 0.0f;
+		
+		// Try to the side
+		if ( CanStandAtPoint( ( pShoveObject->WorldSpaceCenter() + ( vecSkewTrajectory * flClearDistance ) ), &vecStandPosition ) == false )
+		{
+			// Try the other side
+			SinCos( flRad - flRadOffset, &vecSkewTrajectory.y, &vecSkewTrajectory.x );
+			vecSkewTrajectory.z = 0.0f;			
+			if ( CanStandAtPoint( ( pShoveObject->WorldSpaceCenter() + ( vecSkewTrajectory * flClearDistance ) ), &vecStandPosition ) == false )
+				return false;
+		}
+	}
+
+	// Found it, report it
+	if ( pOut != NULL )
+	{
+		*pOut = vecStandPosition;
+	}
+
+	return true;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Iterate through a number of lists depending on our criteria
+//-----------------------------------------------------------------------------
+CBaseEntity *CNPC_AntlionGuard::GetNextShoveTarget( CBaseEntity *pLastEntity, AISightIter_t &iter )
+{
+	// Try to find scripted items first
+	if ( m_strShoveTargets != NULL_STRING )
+	{
+		CBaseEntity *pFound = gEntList.FindEntityByName( pLastEntity, m_strShoveTargets );
+		if ( pFound )
+			return pFound;
+	}
+
+	// Failing that, use our senses
+	if ( iter != (AISightIter_t)(-1) )
+		return GetSenses()->GetNextSeenEntity( &iter );
+
+    return GetSenses()->GetFirstSeenEntity( &iter, SEEN_MISC );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Search for a physics item to swat at the player
+// Output : Returns the object we're going to swat.
+//-----------------------------------------------------------------------------
+CBaseEntity *CNPC_AntlionGuard::FindPhysicsObjectTarget( const PhysicsObjectCriteria_t &criteria )
+{
+	// Must have a valid target entity
+ 	if ( criteria.pTarget == NULL )
+		return NULL;
+
+	if ( g_debug_antlionguard.GetInt() == 3 )
+	{
+		NDebugOverlay::Circle( GetAbsOrigin(), QAngle( -90, 0, 0 ), criteria.flRadius, 255, 0, 0, 8, true, 2.0f );
+	}
+
+	// Get the vector to our target, from ourself
+	Vector vecDirToTarget = criteria.pTarget->GetAbsOrigin() - GetAbsOrigin();
+	VectorNormalize( vecDirToTarget );
+	vecDirToTarget.z = 0;
+
+	// Cost is determined by distance to the object, modified by how "in line" it is with our target direction of travel
+	// Use the distance to the player as the base cost for throwing an object (avoids pushing things too close to the player)
+	float flLeastCost = ( criteria.bPreferObjectsAlongTargetVector ) ? ( criteria.pTarget->GetAbsOrigin() - GetAbsOrigin() ).LengthSqr() : Square( criteria.flRadius );
+	float flCost;
+
+	AISightIter_t iter = (AISightIter_t)(-1);
+	CBaseEntity *pObject = NULL;
+	CBaseEntity	*pNearest = NULL;
+	Vector vecBestHitPosition = vec3_origin;
+
+	// Look through the list of sensed objects for possible targets
+	while( ( pObject = GetNextShoveTarget( pObject, iter ) ) != NULL )
+	{
+		// If we couldn't shove this object last time, don't try again
+		if ( m_FailedPhysicsTargets.Find( pObject ) != m_FailedPhysicsTargets.InvalidIndex() )
+			continue;
+
+		// Ignore things less than half a foot in diameter
+		if ( pObject->CollisionProp()->BoundingRadius() < 6.0f )
+			continue;
+
+		IPhysicsObject *pPhysObj = pObject->VPhysicsGetObject();
+		if ( pPhysObj == NULL )
+			continue;
+
+		// Ignore motion disabled props
+		if ( pPhysObj->IsMoveable() == false )
+			continue;
+
+		// Ignore things lighter than 5kg
+		if ( pPhysObj->GetMass() < 5.0f )
+			continue;
+
+		// Ignore objects moving too quickly (they'll be too hard to catch otherwise)
+		Vector	velocity;
+		pPhysObj->GetVelocity( &velocity, NULL );
+		if ( velocity.LengthSqr() > (16*16) )
+			continue;
+
+		// Get the direction from us to the physics object
+		Vector vecDirToObject = pObject->WorldSpaceCenter() - GetAbsOrigin();
+		VectorNormalize( vecDirToObject );
+		vecDirToObject.z = 0;
+		
+		Vector vecObjCenter = pObject->WorldSpaceCenter();
+		float flDistSqr = 0.0f;
+		float flDot = 0.0f;
+
+		// If we want to find things along the vector to the target, do so
+		if ( criteria.bPreferObjectsAlongTargetVector )
+		{
+			// Object must be closer than our target
+			if ( ( GetAbsOrigin() - vecObjCenter ).LengthSqr() > ( GetAbsOrigin() - criteria.pTarget->GetAbsOrigin() ).LengthSqr() )
+				continue;
+
+			// Calculate a "cost" to this object
+			flDistSqr = ( GetAbsOrigin() - vecObjCenter ).LengthSqr();
+			flDot = DotProduct( vecDirToTarget, vecDirToObject );
+			
+			// Ignore things outside our allowed cone
+			if ( flDot < criteria.flTargetCone )
+				continue;
+
+			// The more perpendicular we are, the higher the cost
+			float flCostScale = RemapValClamped( flDot, 1.0f, criteria.flTargetCone, 1.0f, 4.0f );
+			flCost = flDistSqr * flCostScale;
+		}
+		else
+		{
+			// Straight distance cost
+			flCost = ( criteria.vecCenter - vecObjCenter ).LengthSqr();
+		}
+
+		// This must be a less costly object to use
+		if ( flCost >= flLeastCost )
+		{
+			if ( g_debug_antlionguard.GetInt() == 3 )
+			{
+				NDebugOverlay::Box( vecObjCenter, -Vector(16,16,16), Vector(16,16,16), 255, 0, 0, 0, 2.0f );
+			}
+
+			continue;
+		}
+
+		// Check for a (roughly) clear trajectory path from the object to target
+		trace_t	tr;
+		UTIL_TraceLine( vecObjCenter, criteria.pTarget->BodyTarget( vecObjCenter ), MASK_SOLID_BRUSHONLY, this, COLLISION_GROUP_NONE, &tr );
+		
+		// See how close to our target we got (we still look good hurling things that won't necessarily hit)
+		if ( ( tr.endpos - criteria.pTarget->WorldSpaceCenter() ).LengthSqr() > Square(criteria.flNearRadius) )
+			continue;
+
+		// Must be able to stand at a position to hit the object
+		Vector vecHitPosition;
+		if ( CanStandAtShoveTarget( pObject, criteria.pTarget, &vecHitPosition ) == false )
+		{
+			if ( g_debug_antlionguard.GetInt() == 3 )
+			{
+				NDebugOverlay::HorzArrow( GetAbsOrigin(), pObject->WorldSpaceCenter(), 32.0f, 255, 0, 0, 64, true, 2.0f );
+			}
+			continue;
+		}
+
+		// Take this as the best object so far
+		pNearest = pObject;
+		flLeastCost = flCost;
+		vecBestHitPosition = vecHitPosition;
+		
+		if ( g_debug_antlionguard.GetInt() == 3 )
+		{
+			NDebugOverlay::HorzArrow( GetAbsOrigin(), pObject->WorldSpaceCenter(), 16.0f, 255, 255, 0, 0, true, 2.0f );
+		}
+	}
+
+	// Set extra info if we've succeeded
+	if ( pNearest != NULL )
+	{
+		m_vecPhysicsHitPosition = vecBestHitPosition;
+	
+		if ( g_debug_antlionguard.GetInt() == 3 )
+		{
+			NDebugOverlay::HorzArrow( GetAbsOrigin(), pNearest->WorldSpaceCenter(), 32.0f, 0, 255, 0, 128, true, 2.0f );
+		}
+	}
+
+	return pNearest;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Allows for modification of the interrupt mask for the current schedule.
+//			In the most cases the base implementation should be called first.
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::BuildScheduleTestBits( void )
+{
+	BaseClass::BuildScheduleTestBits();
+
+	// Interrupt if we can shove something
+	if ( IsCurSchedule( SCHED_ANTLIONGUARD_CHASE_ENEMY ) )
+	{
+		SetCustomInterruptCondition( COND_ANTLIONGUARD_PHYSICS_TARGET );
+		SetCustomInterruptCondition( COND_ANTLIONGUARD_CAN_SUMMON );
+	}
+
+	// Interrupt if we've been given a charge target
+	if ( IsCurSchedule( SCHED_ANTLIONGUARD_CHARGE ) == false )
+	{
+		SetCustomInterruptCondition( COND_ANTLIONGUARD_HAS_CHARGE_TARGET );
+	}
+
+	// Once we commit to doing this, just do it!
+	if ( IsCurSchedule( SCHED_MELEE_ATTACK1 ) )
+	{
+		ClearCustomInterruptCondition( COND_ENEMY_OCCLUDED );
+	}
+
+	// Always take heavy damage
+	SetCustomInterruptCondition( COND_HEAVY_DAMAGE );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : &origin - 
+//			radius - 
+//			magnitude - 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::ImpactShock( const Vector &origin, float radius, float magnitude, CBaseEntity *pIgnored )
+{
+	// Also do a local physics explosion to push objects away
+	float	adjustedDamage, flDist;
+	Vector	vecSpot;
+	float	falloff = 1.0f / 2.5f;
+
+	CBaseEntity *pEntity = NULL;
+
+	// Find anything within our radius
+	while ( ( pEntity = gEntList.FindEntityInSphere( pEntity, origin, radius ) ) != NULL )
+	{
+		// Don't affect the ignored target
+		if ( pEntity == pIgnored )
+			continue;
+		if ( pEntity == this )
+			continue;
+
+		// UNDONE: Ask the object if it should get force if it's not MOVETYPE_VPHYSICS?
+		if ( pEntity->GetMoveType() == MOVETYPE_VPHYSICS || ( pEntity->VPhysicsGetObject() && pEntity->IsPlayer() == false ) )
+		{
+			vecSpot = pEntity->BodyTarget( GetAbsOrigin() );
+			
+			// decrease damage for an ent that's farther from the bomb.
+			flDist = ( GetAbsOrigin() - vecSpot ).Length();
+
+			if ( radius == 0 || flDist <= radius )
+			{
+				adjustedDamage = flDist * falloff;
+				adjustedDamage = magnitude - adjustedDamage;
+		
+				if ( adjustedDamage < 1 )
+				{
+					adjustedDamage = 1;
+				}
+
+				CTakeDamageInfo info( this, this, adjustedDamage, DMG_BLAST );
+				CalculateExplosiveDamageForce( &info, (vecSpot - GetAbsOrigin()), GetAbsOrigin() );
+
+				pEntity->VPhysicsTakeDamage( info );
+			}
+		}
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *pTarget - 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::ChargeDamage( CBaseEntity *pTarget )
+{
+	if ( pTarget == NULL )
+		return;
+
+	CBasePlayer *pPlayer = ToBasePlayer( pTarget );
+
+	if ( pPlayer != NULL )
+	{
+		//Kick the player angles
+		pPlayer->ViewPunch( QAngle( 20, 20, -30 ) );	
+
+		Vector	dir = pPlayer->WorldSpaceCenter() - WorldSpaceCenter();
+		VectorNormalize( dir );
+		dir.z = 0.0f;
+		
+		Vector vecNewVelocity = dir * 250.0f;
+		vecNewVelocity[2] += 128.0f;
+		pPlayer->SetAbsVelocity( vecNewVelocity );
+
+		color32 red = {128,0,0,128};
+		UTIL_ScreenFade( pPlayer, red, 1.0f, 0.1f, FFADE_IN );
+	}
+	
+	// Player takes less damage
+	float flDamage = ( pPlayer == NULL ) ? 250 : sk_antlionguard_dmg_charge.GetFloat();
+	
+	// If it's being held by the player, break that bond
+	Pickup_ForcePlayerToDropThisObject( pTarget );
+
+	// Calculate the physics force
+	ApplyChargeDamage( this, pTarget, flDamage );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : &inputdata - 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::InputRagdoll( inputdata_t &inputdata )
+{
+	if ( IsAlive() == false )
+		return;
+
+	//Set us to nearly dead so the velocity from death is minimal
+	SetHealth( 1 );
+
+	CTakeDamageInfo info( this, this, GetHealth(), DMG_CRUSH );
+	BaseClass::TakeDamage( info );
+}
+
+
+
+//-----------------------------------------------------------------------------
+// Purpose: make m_bPreferPhysicsAttack true
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::InputEnablePreferPhysicsAttack( inputdata_t &inputdata )
+{
+	m_bPreferPhysicsAttack = true;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: make m_bPreferPhysicsAttack false
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::InputDisablePreferPhysicsAttack( inputdata_t &inputdata )
+{
+	m_bPreferPhysicsAttack = false;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+int CNPC_AntlionGuard::SelectFailSchedule( int failedSchedule, int failedTask, AI_TaskFailureCode_t taskFailCode )
+{
+	// Figure out what to do next
+	if ( failedSchedule == SCHED_ANTLIONGUARD_CHASE_ENEMY && HasCondition( COND_ENEMY_UNREACHABLE ) )
+		return SelectUnreachableSchedule();
+
+	return BaseClass::SelectFailSchedule( failedSchedule,failedTask, taskFailCode );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : scheduleType - 
+// Output : int
+//-----------------------------------------------------------------------------
+int CNPC_AntlionGuard::TranslateSchedule( int scheduleType )
+{
+	switch( scheduleType )
+	{
+	case SCHED_CHASE_ENEMY:
+		return SCHED_ANTLIONGUARD_CHASE_ENEMY;
+		break;
+	}
+
+	return BaseClass::TranslateSchedule( scheduleType );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::StartSounds( void )
+{
+	//Initialize the additive sound channels
+	CPASAttenuationFilter filter( this );
+
+	if ( m_pGrowlHighSound == NULL )
+	{
+		m_pGrowlHighSound = ENVELOPE_CONTROLLER.SoundCreate( filter, entindex(), CHAN_VOICE, "NPC_AntlionGuard.GrowlHigh",	ATTN_NORM );
+		
+		if ( m_pGrowlHighSound )
+		{
+			ENVELOPE_CONTROLLER.Play( m_pGrowlHighSound,0.0f, 100 );
+		}
+	}
+
+	if ( m_pGrowlIdleSound == NULL )
+	{
+		m_pGrowlIdleSound = ENVELOPE_CONTROLLER.SoundCreate( filter, entindex(), CHAN_STATIC, "NPC_AntlionGuard.GrowlIdle",	ATTN_NORM );
+
+		if ( m_pGrowlIdleSound )
+		{
+			ENVELOPE_CONTROLLER.Play( m_pGrowlIdleSound,0.0f, 100 );
+		}
+	}
+
+	if ( m_pBreathSound == NULL )
+	{
+		m_pBreathSound	= ENVELOPE_CONTROLLER.SoundCreate( filter, entindex(), CHAN_ITEM, "NPC_AntlionGuard.BreathSound",		ATTN_NORM );
+		
+		if ( m_pBreathSound )
+		{
+			ENVELOPE_CONTROLLER.Play( m_pBreathSound,	0.0f, 100 );
+		}
+	}
+
+	if ( m_pConfusedSound == NULL )
+	{
+		m_pConfusedSound = ENVELOPE_CONTROLLER.SoundCreate( filter, entindex(), CHAN_WEAPON,"NPC_AntlionGuard.Confused",	ATTN_NORM );
+
+		if ( m_pConfusedSound )
+		{
+			ENVELOPE_CONTROLLER.Play( m_pConfusedSound,	0.0f, 100 );
+		}
+	}
+
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::InputEnableBark( inputdata_t &inputdata )
+{
+	m_bBarkEnabled = true;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::InputDisableBark( inputdata_t &inputdata )
+{
+	m_bBarkEnabled = false;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::DeathSound( const CTakeDamageInfo &info )
+{
+	EmitSound( "NPC_AntlionGuard.Die" );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : &info - 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::Event_Killed( const CTakeDamageInfo &info )
+{
+	BaseClass::Event_Killed( info );
+
+	// Tell all of my antlions to burrow away, 'cos they fear the Freeman
+	if ( m_iNumLiveAntlions )
+	{
+		CBaseEntity	*pSearch = NULL;
+
+		// Iterate through all antlions and see if there are any orphans
+		while ( ( pSearch = gEntList.FindEntityByClassname( pSearch, "npc_antlion" ) ) != NULL )
+		{
+			CNPC_Antlion *pAntlion = assert_cast<CNPC_Antlion *>(pSearch);
+
+			// See if it's a live orphan
+			if ( pAntlion && pAntlion->GetOwnerEntity() == NULL && pAntlion->IsAlive() )
+			{
+				g_EventQueue.AddEvent( pAntlion, "BurrowAway", RandomFloat(0.1, 2.0), this, this );
+			}
+		}	
+	}
+
+	DestroyGlows();
+
+	// If I'm bleeding, stop due to decreased pressure of hemolymph after
+	// cessation of aortic contraction
+#if ANTLIONGUARD_BLOOD_EFFECTS
+	m_iBleedingLevel = 0;
+#endif
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Don't become a ragdoll until we've finished our death anim
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+bool CNPC_AntlionGuard::CanBecomeRagdoll( void )
+{
+	if ( IsCurSchedule( SCHED_DIE ) )
+		return true;
+
+	return hl2_episodic.GetBool();
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : &force - 
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+bool CNPC_AntlionGuard::BecomeRagdollOnClient( const Vector &force )
+{
+	if ( !CanBecomeRagdoll() ) 
+		return false;
+
+	EmitSound( "NPC_AntlionGuard.Fallover" );
+
+	// Become server-side ragdoll if we're flagged to do it
+	if ( m_spawnflags & SF_ANTLIONGUARD_SERVERSIDE_RAGDOLL )
+	{
+		CTakeDamageInfo	info;
+
+		// Fake the info
+		info.SetDamageType( DMG_GENERIC );
+		info.SetDamageForce( force );
+		info.SetDamagePosition( WorldSpaceCenter() );
+
+		CBaseEntity *pRagdoll = CreateServerRagdoll( this, 0, info, COLLISION_GROUP_NONE );
+
+		// Transfer our name to the new ragdoll
+		pRagdoll->SetName( GetEntityName() );
+		pRagdoll->SetCollisionGroup( COLLISION_GROUP_DEBRIS );
+		
+		// Get rid of our old body
+		UTIL_Remove(this);
+
+		return true;
+	}
+
+	return BaseClass::BecomeRagdollOnClient( force );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Override how we face our target as we move
+// Output :
+//-----------------------------------------------------------------------------
+bool CNPC_AntlionGuard::OverrideMoveFacing( const AILocalMoveGoal_t &move, float flInterval )
+{
+  	Vector		vecFacePosition = vec3_origin;
+	CBaseEntity	*pFaceTarget = NULL;
+	bool		bFaceTarget = false;
+
+	// FIXME: this will break scripted sequences that walk when they have an enemy
+	if ( m_hChargeTarget )
+	{
+		vecFacePosition = m_hChargeTarget->GetAbsOrigin();
+		pFaceTarget = m_hChargeTarget;
+		bFaceTarget = true;
+	}
+#ifdef HL2_EPISODIC
+	else if ( GetEnemy() && IsCurSchedule( SCHED_ANTLIONGUARD_CANT_ATTACK ) )
+	{
+		// Always face our enemy when randomly patrolling around
+		vecFacePosition = GetEnemy()->EyePosition();
+		pFaceTarget = GetEnemy();
+		bFaceTarget = true;
+	}
+#endif	// HL2_EPISODIC
+	else if ( GetEnemy() && GetNavigator()->GetMovementActivity() == ACT_RUN )
+  	{
+		Vector vecEnemyLKP = GetEnemyLKP();
+		
+		// Only start facing when we're close enough
+		if ( ( UTIL_DistApprox( vecEnemyLKP, GetAbsOrigin() ) < 512 ) || IsCurSchedule( SCHED_ANTLIONGUARD_PATROL_RUN ) )
+		{
+			vecFacePosition = vecEnemyLKP;
+			pFaceTarget = GetEnemy();
+			bFaceTarget = true;
+		}
+	}
+
+	// Face
+	if ( bFaceTarget )
+	{
+		AddFacingTarget( pFaceTarget, vecFacePosition, 1.0, 0.2 );
+	}
+
+	return BaseClass::OverrideMoveFacing( move, flInterval );
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : &info - 
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+bool CNPC_AntlionGuard::IsHeavyDamage( const CTakeDamageInfo &info )
+{
+	// Struck by blast
+	if ( info.GetDamageType() & DMG_BLAST )
+	{
+		if ( info.GetDamage() > MIN_BLAST_DAMAGE )
+			return true;
+	}
+
+	// Struck by large object
+	if ( info.GetDamageType() & DMG_CRUSH )
+	{
+		IPhysicsObject *pPhysObject = info.GetInflictor()->VPhysicsGetObject();
+
+		if ( ( pPhysObject != NULL ) && ( pPhysObject->GetGameFlags() & FVPHYSICS_WAS_THROWN ) )
+		{
+			// Always take hits from a combine ball
+			if ( UTIL_IsAR2CombineBall( info.GetInflictor() ) )
+				return true;
+
+			// If we're under half health, stop being interrupted by heavy damage
+			if ( GetHealth() < (GetMaxHealth() * 0.25) )
+				return false;
+
+			// Ignore physics damages that don't do much damage
+			if ( info.GetDamage() < MIN_CRUSH_DAMAGE )
+				return false;
+
+			return true;
+		}
+
+		return false;
+	}
+
+	return false;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : &info - 
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+bool CNPC_AntlionGuard::IsLightDamage( const CTakeDamageInfo &info )
+{
+	return false;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *pChild - 
+//-----------------------------------------------------------------------------
+void CNPC_AntlionGuard::InputSummonedAntlionDied( inputdata_t &inputdata )
+{
+	m_iNumLiveAntlions--;
+	Assert( m_iNumLiveAntlions >= 0 );
+
+	if ( g_debug_antlionguard.GetInt() == 2 )
+	{
+		Msg("Guard summoned antlion count: %d\n", m_iNumLiveAntlions );
+	}
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Filter out sounds we don't care about
+// Input  : *pSound - sound to test against
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+bool CNPC_AntlionGuard::QueryHearSound( CSound *pSound )
+{
+	// Don't bother with danger sounds from antlions or other guards
+	if ( pSound->SoundType() == SOUND_DANGER && ( pSound->m_hOwner != NULL && pSound->m_hOwner->Classify() == CLASS_ANTLION ) )
+		return false;
+
+	return BaseClass::QueryHearSound( pSound );
+}
+
+
+#if HL2_EPISODIC
+//---------------------------------------------------------
+// Prevent the cavern guard from using stopping paths, as it occasionally forces him off the navmesh.
+//---------------------------------------------------------
+bool CNPC_AntlionGuard::CNavigator::GetStoppingPath( CAI_WaypointList *pClippedWaypoints )
+{
+	if (GetOuter()->m_bInCavern)
+	{
+		return false;
+	}
+	else
+	{
+		return BaseClass::GetStoppingPath( pClippedWaypoints );
+	}
+}
+#endif
+
+//-----------------------------------------------------------------------------
+// Purpose: 
+// Input  : *pTarget - 
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+bool CNPC_AntlionGuard::RememberFailedPhysicsTarget( CBaseEntity *pTarget )
+{
+	// Already in the list?
+	if ( m_FailedPhysicsTargets.Find( pTarget ) != m_FailedPhysicsTargets.InvalidIndex() )
+		return true;
+
+	// We're not holding on to any more
+	if ( ( m_FailedPhysicsTargets.Count() + 1 ) > MAX_FAILED_PHYSOBJECTS )
+		return false;
+
+	m_FailedPhysicsTargets.AddToTail( pTarget );
+
+	return true;
+}
+
+//-----------------------------------------------------------------------------
+// Purpose: Handle squad or NPC interactions
+// Output : Returns true on success, false on failure.
+//-----------------------------------------------------------------------------
+bool CNPC_AntlionGuard::HandleInteraction( int interactionType, void *data, CBaseCombatCharacter *sender )
+{
+	// Don't chase targets that other guards in our squad may be going after!
+	if ( interactionType == g_interactionAntlionGuardFoundPhysicsObject )
+	{
+		RememberFailedPhysicsTarget( (CBaseEntity *) data );
+		return true;
+	}
+
+	// Mark a shoved object as being free to pursue again
+	if ( interactionType == g_interactionAntlionGuardShovedPhysicsObject )
+	{
+		CBaseEntity *pObject = (CBaseEntity *) data;
+		m_FailedPhysicsTargets.FindAndRemove( pObject );
+		return true;
+	}
+
+	return BaseClass::HandleInteraction( interactionType, data, sender );
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Cache whatever pose parameters we intend to use
+//-----------------------------------------------------------------------------
+void	CNPC_AntlionGuard::PopulatePoseParameters( void )
+{
+	m_poseThrow = LookupPoseParameter("throw");
+	m_poseHead_Pitch = LookupPoseParameter("head_pitch");
+	m_poseHead_Yaw   = LookupPoseParameter("head_yaw" );
+
+	BaseClass::PopulatePoseParameters();
+}
+
+#if ANTLIONGUARD_BLOOD_EFFECTS
+//-----------------------------------------------------------------------------
+// Purpose: Return desired level for the continuous bleeding effect (not the 
+//				individual blood spurts you see per bullet hit)
+//          Return 0 for don't bleed, 
+//				   1 for mild bleeding
+//                 2 for severe bleeding
+//-----------------------------------------------------------------------------
+unsigned char CNPC_AntlionGuard::GetBleedingLevel( void ) const
+{
+	if ( m_iHealth > ( m_iMaxHealth >> 1 ) )
+	{	// greater than 50%
+		return 0;
+	}
+	else if ( m_iHealth > ( m_iMaxHealth >> 2 ) )
+	{	// less than 50% but greater than 25%
+		return 1;
+	}
+	else
+	{
+		return 2;
+	}
+}
+#endif
+
+//-----------------------------------------------------------------------------
+//
+// Schedules
+//
+//-----------------------------------------------------------------------------
+
+AI_BEGIN_CUSTOM_NPC( npc_antlionguard, CNPC_AntlionGuard )
+
+	// Interactions	
+	DECLARE_INTERACTION( g_interactionAntlionGuardFoundPhysicsObject )
+	DECLARE_INTERACTION( g_interactionAntlionGuardShovedPhysicsObject )
+
+	// Squadslots	
+	DECLARE_SQUADSLOT( SQUAD_SLOT_ANTLIONGUARD_CHARGE )
+
+	//Tasks
+	DECLARE_TASK( TASK_ANTLIONGUARD_CHARGE )
+	DECLARE_TASK( TASK_ANTLIONGUARD_GET_PATH_TO_PHYSOBJECT )
+	DECLARE_TASK( TASK_ANTLIONGUARD_SHOVE_PHYSOBJECT )
+	DECLARE_TASK( TASK_ANTLIONGUARD_SUMMON )
+	DECLARE_TASK( TASK_ANTLIONGUARD_SET_FLINCH_ACTIVITY )
+	DECLARE_TASK( TASK_ANTLIONGUARD_GET_PATH_TO_CHARGE_POSITION )
+	DECLARE_TASK( TASK_ANTLIONGUARD_GET_PATH_TO_NEAREST_NODE )
+	DECLARE_TASK( TASK_ANTLIONGUARD_GET_CHASE_PATH_ENEMY_TOLERANCE )
+	DECLARE_TASK( TASK_ANTLIONGUARD_OPPORTUNITY_THROW )
+	DECLARE_TASK( TASK_ANTLIONGUARD_FIND_PHYSOBJECT )
+
+	//Activities
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_SEARCH )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_PEEK_FLINCH )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_PEEK_ENTER )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_PEEK_EXIT )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_PEEK1 )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_BARK )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_PEEK_SIGHTED )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_CHARGE_START )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_CHARGE_CANCEL )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_CHARGE_RUN )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_CHARGE_CRASH )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_CHARGE_STOP )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_CHARGE_HIT )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_CHARGE_ANTICIPATION )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_SHOVE_PHYSOBJECT )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_FLINCH_LIGHT )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_UNBURROW )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_ROAR )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_RUN_HURT )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_PHYSHIT_FR )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_PHYSHIT_FL )
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_PHYSHIT_RR )	
+	DECLARE_ACTIVITY( ACT_ANTLIONGUARD_PHYSHIT_RL )		
+	
+	//Adrian: events go here
+	DECLARE_ANIMEVENT( AE_ANTLIONGUARD_CHARGE_HIT )
+	DECLARE_ANIMEVENT( AE_ANTLIONGUARD_SHOVE_PHYSOBJECT )
+	DECLARE_ANIMEVENT( AE_ANTLIONGUARD_SHOVE )
+	DECLARE_ANIMEVENT( AE_ANTLIONGUARD_FOOTSTEP_LIGHT )
+	DECLARE_ANIMEVENT( AE_ANTLIONGUARD_FOOTSTEP_HEAVY )
+	DECLARE_ANIMEVENT( AE_ANTLIONGUARD_CHARGE_EARLYOUT )
+	DECLARE_ANIMEVENT( AE_ANTLIONGUARD_VOICE_GROWL )
+	DECLARE_ANIMEVENT( AE_ANTLIONGUARD_VOICE_BARK )
+	DECLARE_ANIMEVENT( AE_ANTLIONGUARD_VOICE_PAIN )
+	DECLARE_ANIMEVENT( AE_ANTLIONGUARD_VOICE_SQUEEZE )
+	DECLARE_ANIMEVENT( AE_ANTLIONGUARD_VOICE_SCRATCH )
+	DECLARE_ANIMEVENT( AE_ANTLIONGUARD_VOICE_GRUNT )
+	DECLARE_ANIMEVENT( AE_ANTLIONGUARD_BURROW_OUT )
+	DECLARE_ANIMEVENT( AE_ANTLIONGUARD_VOICE_ROAR )
+
+	DECLARE_CONDITION( COND_ANTLIONGUARD_PHYSICS_TARGET )
+	DECLARE_CONDITION( COND_ANTLIONGUARD_PHYSICS_TARGET_INVALID )
+	DECLARE_CONDITION( COND_ANTLIONGUARD_HAS_CHARGE_TARGET )
+	DECLARE_CONDITION( COND_ANTLIONGUARD_CAN_SUMMON )
+	DECLARE_CONDITION( COND_ANTLIONGUARD_CAN_CHARGE )
+
+	//==================================================
+	// SCHED_ANTLIONGUARD_SUMMON
+	//==================================================
+
+	DEFINE_SCHEDULE
+	(
+		SCHED_ANTLIONGUARD_SUMMON,
+
+		"	Tasks"
+		"		TASK_STOP_MOVING						0"
+		"		TASK_FACE_ENEMY							0"
+		"		TASK_PLAY_SEQUENCE						ACTIVITY:ACT_ANTLIONGUARD_BARK"
+		"		TASK_ANTLIONGUARD_SUMMON				0"
+		"		TASK_ANTLIONGUARD_OPPORTUNITY_THROW		0"
+		"	"
+		"	Interrupts"
+		"		COND_HEAVY_DAMAGE"
+	)
+
+	//==================================================
+	// SCHED_ANTLIONGUARD_CHARGE
+	//==================================================
+
+	DEFINE_SCHEDULE
+	(
+		SCHED_ANTLIONGUARD_CHARGE,
+
+		"	Tasks"
+		"		TASK_STOP_MOVING					0"
+		"		TASK_SET_FAIL_SCHEDULE				SCHEDULE:SCHED_ANTLIONGUARD_CHASE_ENEMY"
+		"		TASK_FACE_ENEMY						0"
+		"		TASK_ANTLIONGUARD_CHARGE			0"
+		""
+		"	Interrupts"
+		"		COND_TASK_FAILED"
+		"		COND_HEAVY_DAMAGE"
+
+		// These are deliberately left out so they can be detected during the 
+		// charge Task and correctly play the charge stop animation.
+		//"		COND_NEW_ENEMY"
+		//"		COND_ENEMY_DEAD"
+		//"		COND_LOST_ENEMY"
+	)
+
+	//==================================================
+	// SCHED_ANTLIONGUARD_CHARGE_TARGET
+	//==================================================
+
+	DEFINE_SCHEDULE
+	(
+		SCHED_ANTLIONGUARD_CHARGE_TARGET,
+
+		"	Tasks"
+		"		TASK_STOP_MOVING					0"
+		"		TASK_FACE_ENEMY						0"
+		"		TASK_ANTLIONGUARD_CHARGE			0"
+		""
+		"	Interrupts"
+		"		COND_TASK_FAILED"
+		"		COND_ENEMY_DEAD"
+		"		COND_HEAVY_DAMAGE"
+	)
+
+	//==================================================
+	// SCHED_ANTLIONGUARD_CHARGE_SMASH
+	//==================================================
+
+	DEFINE_SCHEDULE
+	(
+		SCHED_ANTLIONGUARD_CHARGE_CRASH,
+
+		"	Tasks"
+		"		TASK_STOP_MOVING			0"
+		"		TASK_PLAY_SEQUENCE			ACTIVITY:ACT_ANTLIONGUARD_CHARGE_CRASH"
+		""
+		"	Interrupts"
+		"		COND_TASK_FAILED"
+		"		COND_HEAVY_DAMAGE"
+	)
+
+	//==================================================
+	// SCHED_ANTLIONGUARD_PHYSICS_ATTACK
+	//==================================================
+
+	DEFINE_SCHEDULE
+	( 
+		SCHED_ANTLIONGUARD_PHYSICS_ATTACK,
+
+		"	Tasks"
+		"		TASK_SET_FAIL_SCHEDULE						SCHEDULE:SCHED_ANTLIONGUARD_CHASE_ENEMY"
+		"		TASK_ANTLIONGUARD_GET_PATH_TO_PHYSOBJECT	0"
+		"		TASK_RUN_PATH								0"
+		"		TASK_WAIT_FOR_MOVEMENT						0"
+		"		TASK_FACE_ENEMY								0"
+		"		TASK_ANTLIONGUARD_SHOVE_PHYSOBJECT			0"
+		""
+		"	Interrupts"
+		"		COND_TASK_FAILED"
+		"		COND_ENEMY_DEAD"
+		"		COND_LOST_ENEMY"
+		"		COND_NEW_ENEMY"
+		"		COND_ANTLIONGUARD_PHYSICS_TARGET_INVALID"
+		"		COND_HEAVY_DAMAGE"
+	)
+
+	//==================================================
+	// SCHED_FORCE_ANTLIONGUARD_PHYSICS_ATTACK
+	//==================================================
+
+	DEFINE_SCHEDULE
+	( 
+		SCHED_FORCE_ANTLIONGUARD_PHYSICS_ATTACK,
+
+		"	Tasks"
+		"		TASK_SET_FAIL_SCHEDULE						SCHEDULE:SCHED_ANTLIONGUARD_CANT_ATTACK"
+		"		TASK_ANTLIONGUARD_FIND_PHYSOBJECT			0"
+		"		TASK_SET_SCHEDULE							SCHEDULE:SCHED_ANTLIONGUARD_PHYSICS_ATTACK"
+		""
+		"	Interrupts"
+		"		COND_ANTLIONGUARD_PHYSICS_TARGET"
+		"		COND_HEAVY_DAMAGE"
+	)
+
+	//==================================================
+	// SCHED_ANTLIONGUARD_CANT_ATTACK
+	//		If we're here, the guard can't chase enemy, can't find a physobject to attack with, and can't summon
+	//==================================================
+
+#ifdef HL2_EPISODIC
+
+	DEFINE_SCHEDULE
+	( 
+		SCHED_ANTLIONGUARD_CANT_ATTACK,
+
+		"	Tasks"
+		"		TASK_SET_ROUTE_SEARCH_TIME		2"	// Spend 5 seconds trying to build a path if stuck
+		"		TASK_GET_PATH_TO_RANDOM_NODE	1024"
+		"		TASK_WALK_PATH					0"
+		"		TASK_WAIT_FOR_MOVEMENT			0"
+		"		TASK_WAIT_PVS					0"
+		""
+		"	Interrupts"
+		"		COND_GIVE_WAY"
+		"		COND_NEW_ENEMY"
+		"		COND_ANTLIONGUARD_PHYSICS_TARGET"
+		"		COND_HEAVY_DAMAGE"
+	)
+
+#else
+
+	DEFINE_SCHEDULE
+	( 
+	SCHED_ANTLIONGUARD_CANT_ATTACK,
+
+	"	Tasks"
+	"		TASK_WAIT								5"
+	""
+	"	Interrupts"
+	)
+
+#endif
+
+	//==================================================
+	// SCHED_ANTLIONGUARD_PHYSICS_DAMAGE_HEAVY
+	//==================================================
+
+	DEFINE_SCHEDULE
+	(
+		SCHED_ANTLIONGUARD_PHYSICS_DAMAGE_HEAVY,
+
+		"	Tasks"
+		"		TASK_STOP_MOVING						0"
+		"		TASK_RESET_ACTIVITY						0"
+		"		TASK_ANTLIONGUARD_SET_FLINCH_ACTIVITY	0"
+		""
+		"	Interrupts"
+	)
+
+	//==================================================
+	// SCHED_ANTLIONGUARD_UNBURROW
+	//==================================================
+
+	DEFINE_SCHEDULE
+	(
+		SCHED_ANTLIONGUARD_UNBURROW,
+
+		"	Tasks"
+		"		TASK_PLAY_SEQUENCE			ACTIVITY:ACT_ANTLIONGUARD_UNBURROW"
+		""
+		"	Interrupts"
+	)
+
+	//==================================================
+	// SCHED_ANTLIONGUARD_CHARGE_CANCEL
+	//==================================================
+
+	DEFINE_SCHEDULE
+	(
+		SCHED_ANTLIONGUARD_CHARGE_CANCEL,
+
+		"	Tasks"
+		"		TASK_PLAY_SEQUENCE			ACTIVITY:ACT_ANTLIONGUARD_CHARGE_CANCEL"
+		""
+		"	Interrupts"
+	)
+	
+	//==================================================
+	// SCHED_ANTLIONGUARD_FIND_CHARGE_POSITION
+	//==================================================
+
+	DEFINE_SCHEDULE
+	(
+		SCHED_ANTLIONGUARD_FIND_CHARGE_POSITION,
+
+		"	Tasks"
+		"		TASK_ANTLIONGUARD_GET_PATH_TO_CHARGE_POSITION	0"
+		"		TASK_RUN_PATH									0"
+		"		TASK_WAIT_FOR_MOVEMENT							0"
+		"	"
+		"	Interrupts"
+		"		COND_ENEMY_DEAD"
+		"		COND_GIVE_WAY"
+		"		COND_TASK_FAILED"
+		"		COND_HEAVY_DAMAGE"
+	)
+
+	//=========================================================
+	// > SCHED_ANTLIONGUARD_CHASE_ENEMY_TOLERANCE
+	//=========================================================
+	DEFINE_SCHEDULE
+	(
+		SCHED_ANTLIONGUARD_CHASE_ENEMY_TOLERANCE,
+
+		"	Tasks"
+		"		TASK_STOP_MOVING									0"
+		"		TASK_SET_FAIL_SCHEDULE								SCHEDULE:SCHED_ANTLIONGUARD_PATROL_RUN"
+		"		TASK_ANTLIONGUARD_GET_PATH_TO_NEAREST_NODE			500"
+		"		TASK_RUN_PATH										0"
+		"		TASK_WAIT_FOR_MOVEMENT								0"
+		"		TASK_FACE_ENEMY										0"
+		""
+		"	Interrupts"
+		"		COND_TASK_FAILED"
+		"		COND_CAN_MELEE_ATTACK1"
+		"		COND_GIVE_WAY"
+		"		COND_NEW_ENEMY"
+		"		COND_ANTLIONGUARD_CAN_SUMMON"
+		"		COND_ANTLIONGUARD_PHYSICS_TARGET"
+		"		COND_HEAVY_DAMAGE"
+		"		COND_ANTLIONGUARD_CAN_CHARGE"
+	);
+
+	//=========================================================
+	// > PATROL_RUN
+	//=========================================================
+	DEFINE_SCHEDULE
+	(
+		SCHED_ANTLIONGUARD_PATROL_RUN,
+
+		"	Tasks"
+		"		TASK_SET_FAIL_SCHEDULE						SCHEDULE:SCHED_ANTLIONGUARD_CANT_ATTACK"
+		"		TASK_SET_ROUTE_SEARCH_TIME					3"	// Spend 3 seconds trying to build a path if stuck
+		"		TASK_ANTLIONGUARD_GET_PATH_TO_NEAREST_NODE	500"
+		"		TASK_RUN_PATH								0"
+		"		TASK_WAIT_FOR_MOVEMENT						0"
+		""
+		"	Interrupts"
+		"		COND_TASK_FAILED"
+		"		COND_CAN_MELEE_ATTACK1"
+		"		COND_GIVE_WAY"
+		"		COND_NEW_ENEMY"
+		"		COND_ANTLIONGUARD_PHYSICS_TARGET"
+		"		COND_ANTLIONGUARD_CAN_SUMMON"
+		"		COND_HEAVY_DAMAGE"
+		"		COND_ANTLIONGUARD_CAN_CHARGE"
+	);
+
+	//==================================================
+	// SCHED_ANTLIONGUARD_ROAR
+	//==================================================
+
+	DEFINE_SCHEDULE
+	(
+		SCHED_ANTLIONGUARD_ROAR,
+
+		"	Tasks"
+		"		TASK_STOP_MOVING			0"
+		"		TASK_FACE_ENEMY				0"
+		"		TASK_PLAY_SEQUENCE			ACTIVITY:ACT_ANTLIONGUARD_ROAR"
+		"	"
+		"	Interrupts"
+		"		COND_HEAVY_DAMAGE"
+	)
+
+	//==================================================
+	// SCHED_ANTLIONGUARD_TAKE_COVER_FROM_ENEMY
+	//==================================================
+	DEFINE_SCHEDULE
+	(
+		SCHED_ANTLIONGUARD_TAKE_COVER_FROM_ENEMY,
+
+		"	Tasks"
+		"		TASK_SET_FAIL_SCHEDULE			SCHEDULE:SCHED_ANTLIONGUARD_CANT_ATTACK"
+		"		TASK_FIND_COVER_FROM_ENEMY		0"
+		"		TASK_RUN_PATH					0"
+		"		TASK_WAIT_FOR_MOVEMENT			0"
+		"		TASK_STOP_MOVING				0"
+		""
+		"	Interrupts"
+		"		COND_TASK_FAILED"
+		"		COND_NEW_ENEMY"
+		"		COND_ENEMY_DEAD"
+		"		COND_ANTLIONGUARD_PHYSICS_TARGET"
+		"		COND_ANTLIONGUARD_CAN_SUMMON"
+		"		COND_HEAVY_DAMAGE"
+	)
+
+	//=========================================================
+	// SCHED_ANTLIONGUARD_CHASE_ENEMY
+	//=========================================================
+	DEFINE_SCHEDULE
+	(
+		SCHED_ANTLIONGUARD_CHASE_ENEMY,
+
+		"	Tasks"
+		"		TASK_STOP_MOVING				0"
+		"		TASK_GET_CHASE_PATH_TO_ENEMY	300"
+		"		TASK_RUN_PATH					0"
+		"		TASK_WAIT_FOR_MOVEMENT			0"
+		"		TASK_FACE_ENEMY			0"
+		""
+		"	Interrupts"
+		"		COND_NEW_ENEMY"
+		"		COND_ENEMY_DEAD"
+		"		COND_ENEMY_UNREACHABLE"
+		"		COND_CAN_RANGE_ATTACK1"
+		// "		COND_CAN_MELEE_ATTACK1"
+		"		COND_CAN_RANGE_ATTACK2"
+		"		COND_CAN_MELEE_ATTACK2"
+		"		COND_TOO_CLOSE_TO_ATTACK"
+		"		COND_TASK_FAILED"
+		"		COND_LOST_ENEMY"
+		"		COND_HEAVY_DAMAGE"
+		"		COND_ANTLIONGUARD_CAN_CHARGE"
+	)
+
+AI_END_CUSTOM_NPC()