npc_antlion

Code classes:

• CNPC_Antlion
• CAI_BaseNPC (NPCs)
• CBaseCombatCharacter
• CBaseFlex
• CBaseAnimatingOverlay
• CBaseAnimating (models)
• CBaseEntity (all ents)

npc_antlion is a point entity present in the Half-Life 2 series. It is a weak NPC that can burrow, and "fly" by jumping. The player can command them with bugbait, given that the antlion_allied global variable is set. Their most common role in level design is that of cannon fodder. Antlions are blind, and navigate entirely by sound and smell. They can navigate by jumping and use the HULL_MEDIUM hull for navigation; give them decent space to maneuver.

ConVars/Commands

ConVar/Command	Parameters or default value	Parameter Type	Effect
g_debug_antlion	0	Arbitrary value	Shows various debugging info for antlions. 1: Shows yellow X's where antlions are trying to go when commanded by bugbait. 2: When antlions are interested in jumping at an enemy, shows information about it. 3: Shows hulls of where antlions try to go when commanded.
sk_antlion_health	30	Health amount	How much health antlions have.
sk_antlion_swipe_damage	5	Damage amount	How much damage is dealt by antlion claw attacks and by bashing into enemies.
sk_antlion_worker_burst_damage	50	Damage amount	How much damage is dealt by worker antlions to nearby enemies when they burst.
sk_antlion_worker_burst_radius	160	World units	How big the worker antlion's explosion is. Vortigaunts consider this too close to attack (aside from dynamic interactions).
sk_antlion_worker_health	60	Health amount	How much health acid antlions have.
sk_antlion_worker_spit_speed	600	Arbitrary value	How fast the acid projectile is. Affects the arc traveled.
g_debug_antlion_worker	0	0 disables, 1 enables	Shows debugging info about acid spit paths.

Flags

• 65536: Burrow when eluded - Automatically burrow away when enemies are too far away or unreachable.

• 131072: Use Ground Checks - To do: Description.

• 262144: Worker Type - Makes the antlion an acid type, seen in Episode 2.

Keyvalues

Start Burrowed (startburrowed) <boolean>

Makes the antlion spawn underground, then dig their way out.

Ignore Bugbait (ignorebugbait) <boolean>

Makes the antlion ignore bugbait (but still be friendly to the player).

Alert Radius (radius) <float>

No effect.

Distance until eluded (eludedist) <float>

If Burrow when eluded is checked, the distance at which the target has eluded the antlion.

Suppress unburrow effects (unburroweffects) <boolean>

Hides the dust effect made when antlions unburrow.

Inputs

Unburrow

Makes the antlion dig up out of the ground.

Burrow

Makes the antlion dig into the ground.

BurrowAway

Makes the antlion dig into the ground and disappear forever.

FightToPosition <target_destination>

Sends the antlion to a given entity.

StopFightToPosition (Not in FGD)

Makes the antlion forget about its target entity, if any.

EnableJump

Allows jumping at any time.

DisableJump

Forbids jumping unless needed for navigation.

IgnoreBugbait

Sets Ignore Bugbait to Yes.

HearBugbait

Sets Ignore Bugbait to No.

JumpAtTarget (Not in FGD) <target_destination>

Makes the antlion jump to an entity. Might not work well.

Outputs

OnReachedFightGoal

Fires when the antlion reaches a Fight Target (fighttarget) specified by an npc_antlion_template_maker.

OnUnBurrowed

Fires when the antlion begins to unburrow.

See Also

• npc_antlionguard
• weapon_bugbait