npc_combinegunship

npc_combinegunship is a point entity available in Half-Life 2, Half-Life 2: Episode One, Half-Life 2: Episode Two, and Half-Life 2: Deathmatch. A flying Combine NPC with one main gun and the ability to track and shoot down RPG rockets.

Class hierarchy
CNPC_CombineGunship ↳CBaseHelicopter ↳CAI_BaseNPC ↳CBaseCombatCharacter ↳CBaseFlex ↳CBaseAnimatingOverlay ↳CBaseAnimating ↳CBaseEntity
npc_combinegunship.cpp

Note:The gunship does not use info_node_air for navigation. It follows path_tracks exclusively! It does so quite intelligently though, so the result looks rather dynamic.

Note:Some keyvalues, spawnflags, effect flags, inputs, or outputs might not affect an NPC, based on the functionality and coding of the NPC.

Tip:Use info_target_gunshipcrash entities to suggest spectacular crashing points for defeated gunships.

Tip:npc_heli_avoidsphere works with this npc

Dedicated Console Variables

Cvar/Command	Parameters or default value	Descriptor	Effect
sk_gunship_burst_size	15	float	Fire off this many bullets in a burst.
sk_gunship_burst_min	800	float	Pathing avoid distance.
sk_gunship_burst_dist	768	float	The maximum distance from the enemy that the gunship will start stitching.
sk_gunship_health_increments	5	int	Number of times the gunship must be struck by explosive damage (multiplied for skill settings).
g_debug_gunship	0	choices	Debug type: 0: Disabled 1: Leading 2: Path 3: Stitching
sk_npc_dmg_gunship	40	float	Used by ammotype "CombineCannon".
sk_npc_dmg_gunship_to_plr	3	float	Used by ammotype "CombineCannon".

Keyvalues

BaseHelicopter:

Initial Speed (InitialSpeed) <string>

The speed that the entity should try to reach as soon as it spawns

Target path_track (target) <targetname>

The name of a path_track that this NPC will fly to after spawning.

Flags

• 1 : Wait Till Seen
• 2 : Gag (No IDLE sounds until angry)
• 4 : Fall to ground (unchecked means *teleport* to ground)
• 8 : Drop Healthkit
• 16 : Efficient - Don't acquire enemies or avoid obstacles
• 32 : No Rotorwash
• 64 : Await Input
• 128 : Wait For Script
• 256 : Long Visibility/Shoot
• 512 : Fade Corpse
• 1024 : Think outside PVS
• 2048 : Template NPC (used by npc_maker, will not spawn)
• 4096 : No ground attack
• 8192 : Use chopper model !FGD

Inputs

OmniscientOn

Gunship knows target's location even when target is out of sight or behind cover

OmniscientOff

Gunship relies on normal sight functions to locate target

BlindfireOn

Gunship will fire at an unseen target, attempting to punch through to them

BlindfireOff

Gunship only fires at visible target

SetPenetrationDepth <float>

Set penetration depth of bullets

SetDockingBBox

Shrink Bounding Box

SetNormalBBox

Set Bounding Box to normal size

EnableGroundAttack

Allow the gunship to use its ground attack

DisableGroundAttack

Don't allow the gunship to use its ground attack

DoGroundAttack <string>

Causes the gunship to execute its ground attack

BaseHelicopter

MoveTopSpeed The helicopter will immediately move at top speed toward its current goal, or in its current orientation if it's on top of its goal. MoveSpecifiedSpeed <float> The helicopter will immediately move at the specified speed (you provide this as parameter override in units per second) towards its current goal. ChangePathCorner <targetname> Tell the helicopter to move to a path corner on a new path. SelfDestruct Self Destruct. Activate Activate. Use to wake up a helicopter that spawned with the 'Await Input' spawnflag on. SetTrack <targetname> Set a track for the helicopter to adhere to. The helicopter will do nothing if it's on the same path, and will move to the closest point on the specified track if it's on a different path. FlyToSpecificTrackViaPath <targetname> The helicopter will first fly to the closest point on the path if it's on a different path. Then it'll fly along the path to the specified track point. FlyToPathTrack <targetname> The helicopter will fly to the given path_track. StartPatrol Start patrolling back and forth along the current track. StopPatrol Stop patrolling back and forth along the track. This will cause the helicopter to come to rest at the track which he's currently flying toward. ChooseFarthestPathPoint When tracking an enemy, choose the point on the path furthest from the enemy, but still in firing range. ChooseNearestPathPoint When tracking an enemy, choose the point on the path nearest from the enemy. StartBreakableMovement The helicopter is now allowed to disobey direct commands to go to particular points if it senses an enemy. It will move to the closest point (or farthest point, if ChooseFarthestPathPoint is used), on the path if it senses an enemy. StopBreakableMovement The helicopter can no longer disobey direct commands. It will continue to fly along it's patrol path or to it's specified target even if it senses an enemy. EnableRotorSound Starts the chopper's rotors making noise (normal behaviour) DisableRotorSound Stops the noise made by the rotors EnableRotorWash Makes the chopper exert a force on physics objects underneath its rotor, and produce a wind pattern on any water (normal behaviour) DisableRotorWash Turns off the forces and wind pattern SetAngles  !FGD InputStartLeading  !FGD InputStopLeading  !FGD GunOn Allows the chopper to use its gun (normal behaviour) GunOff Prevents the chopper from using its gun MissileOn Starts the chopper firing rockets Bug:Non-functional.  [todo tested in?] MissileOff Stops the chopper firing rockets Bug:Non-functional.  [todo tested in?]

Outputs

OnFireCannon

Fired when the gunship fires a cannon round.

OnFirstDamage

Fired when the first damage is done to the gunship.

OnSecondDamage

Fired when the second damage is done to the gunship.

OnThirdDamage

Fired when the third damage is done to the gunship.

OnFourthDamage

Fired when the fourth damage is done to the gunship.

OnCrashed

Fired when gunship crashes.

BaseNPC Outputs

OnDamaged Fired when this NPC takes damage (!activator is the damage inflictor). OnDamagedByPlayer Fired when this NPC is hurt by a player (!activator is the attacker or vehicle driver [if friendly fire]). OnDamagedByPlayerSquad Fired when this NPC is hurt by a player OR by one of the player's squadmates (!activator is the attacker or vehicle driver [if friendly fire]). OnDeath Fired when this NPC is killed (!activator is the killer). OnDenyCommanderUse Fired when this NPC has refused to join the player's squad. OnForcedInteractionAborted Fired when the NPC aborts a forced interaction for some reason (target NPC died, couldn't be pathed to, etc.). OnForcedInteractionStarted Fired when the NPC starts a forced interaction. OnForcedInteractionFinished "NPCs in actbusies can no longer perform dynamic interactions." Todo: What does this mean? OnHalfHealth Fired when this NPC reaches half of its maximum health. OnHearCombat Fired when this NPC hears combat sounds. OnHearPlayer Fired when this NPC hears the player. OnHearWorld Fired when this NPC hears a sound (other than combat or the player). OnFoundEnemy <targetname> Fired when this NPC establishes line of sight to its enemy. OnLostEnemy Fired when this NPC loses its enemy. Usually due to the enemy being killed/removed, or because this NPC has selected a newer, more dangerous enemy. OnLostEnemyLOS Fired when this NPC loses line of sight to its enemy. OnFoundPlayer <targetname> Fired when this NPC establishes line of sight to its enemy, and that enemy is a player. OnLostPlayer Fired when this NPC loses its enemy, and that enemy was a player. Usually due to the enemy being killed/removed, or because this NPC has selected a newer, more dangerous enemy. OnLostPlayerLOS Fired when this NPC loses line of sight to its enemy, and that enemy is a player. OnSleep Fired when this NPC enters a sleep state. OnWake Fired when this NPC comes out of a sleep state.