Npc helicopter

Entity Description

Helicopter - click to enlarge.

A Combine helicopter, (also called a "Hunter-Chopper") armed with a machine gun and floating mines.

• This is a flying NPC that uses info_node_air, info_node_air_hint or path_tracks for AI navigation.

Related Entities:

• npc_heli_avoidbox
• npc_heli_avoidsphere
• npc_heli_nobomb
• helicopter_bomb

Placement Tip:Hunter-Choppers are used mainly in the Half-Life 2 series as chase vehicles, hence the name.

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

Dedicated Console Variables

• sk_helicopter_health

<integer> Helicopter Spawn Health

• sk_helicopter_firingcone

<float> The angle in degrees of the cone in which the shots will be fired

• sk_helicopter_burstcount

<integer> How many shot bursts to fire after charging up. The bigger the number, the longer the firing is

• sk_helicopter_roundsperburst

<integer> How many shots to fire in a single burst

• sk_helicopter_grenadedamage

<float> The amount of damage the helicopter grenade deals.

• sk_helicopter_grenaderadius

<float> The damage radius of the helicopter grenade.

• sk_helicopter_grenadeforce

<float> The physics force that the helicopter grenade exerts.

• sk_npc_dmg_helicopter_to_plr

<float> Damage helicopter shots deal to the player

Used in ammotype "HelicopterGun"

• sk_npc_dmg_helicopter

<float> Damage helicopter shots deal to everything but the player

Used in ammotype "HelicopterGun"

• sk_helicopter_drone_speed

<float> How fast does the zapper drone move?

• g_helicopter_chargetime

<float> How much time we have to wait (on average) between the time we start hearing the charging sound + the chopper fires

• g_helicopter_bullrush_distance

<float>

• g_helicopter_bullrush_bomb_enemy_distance

<float>

• g_helicopter_bullrush_bomb_time

<float>

• g_helicopter_idletime

<float>

• g_helicopter_maxfiringdist

<float>

• g_helicopter_bullrush_bomb_speed

<float>

• g_helicopter_bullrush_shoot_height

<float>

• g_helicopter_bullrush_mega_bomb_health

<float>

Keyvalues

• Template:Kv basehelicopter

• InitialSpeed

<float>

• GracePeriod

<float> Time in seconds the helicopter has to see the player before he starts shooting

• PatrolSpeed

<float> Speed at which the helicopter moves if he has no enemy.

Flags

Wait Till Seen : [1]

Gag (No IDLE sounds until angry) : [2]

Fall to ground (unchecked means *teleport* to ground) : [4]

Drop Healthkit : [8]

Efficient - Don't acquire enemies or avoid obstacles : [16]

No Rotorwash : [32]

Await Input : [64]

Wait For Script : [128]

Long Visibility/Shoot : [256]

Fade Corpse : [512]

Think outside PVS : [1024]

Template NPC (used by npc_maker, will not spawn) : [2048]

Do Alternate collision for this NPC (player avoidance) : [4096]

Don't drop weapons : [8192]

• 65536 : Loud rotor wash sound

• 131072 : Electrical drone

• 262144 : Helicopter lights

• 524288 : Ignore avoid spheres+boxes

• 1048576 : More aggressive attacks

Inputs

• Template:I basehelicopter

• GunOn

• GunOff

• MissileOn

• MissileOff

• EnableRotorWash

• DisableRotorWash

• EnableRotorSound

• DisableRotorSound

• StartBombingVehicle

Starts the chopper leading enemy vehicles and dropping bombs on them.

• StartTrailingVehicle

Starts the chopper trailing enemy vehicles and shooting at them.

• StartDefaultBehavior

Starts the chopper in the mode where he always stops at nav points instead of stopping anywhere in between nav points.

• StartAlwaysLeadingVehicle

Starts the chopper *always* leading enemy vehicles (regardless of how they are moving w/respect to the path) and dropping bombs on them. This mode is different from StartBombingVehicle in that it never uses the machine gun.

• StartSprinkleBehavior

Starts the chopper dropping bombs randomly + shooting at the player.

• StartBullrushBehavior

Starts the chopper bullrushing the player.

• SetHealthFraction <float>

Sets the chopper health as a percentage of max health

• EnableDeadlyShooting

Starts the chopper being deadly to on-foot players

• DisableDeadlyShooting

Stops the chopper being deadly to on-foot players

• StartNormalShooting

The chopper will fire in short bursts. Good for on-foot experiences

• StartLongCycleShooting

The chopper fires in long bursts

• StartContinuousShooting

The chopper fires continuously.

• ResetIdleTime

Allows the helicopter to fire immediately if he's not in the middle of charging or firing

• SetAngles <angles>

Instantly snaps the orientation of the helicopter

• DropBomb

Immediately drops a bomb based on normal bomb dropping rules

• DropBombStraightDown

Immediately drops a bomb directly downwards

• DropBombAtTarget <target_destination>

Immediately drops a bomb directly at the target destination, but only if the player isn't right there

• DropBombAtTargetAlways <target_destination>

Immediately drops a bomb directly at the target destination, no matter whether it's fair or not.

• DropBombDelay <float>

Add a delay before the next bomb is dropped

• BecomeIndestructible

Makes the helicopter take no more damage

• DisablePathVisibilityTests

When the helicopter moves, he will not check for visibility from the path_track to the enemy to cull out path_tracks

• EnablePathVisibilityTests

When the helicopter moves, he will only move to path_tracks that have line-of-sight to the enemy

Outputs

• Template:O basenpc

• OnHealthChanged <integer>

Fires when the helicopter health changes. The integer is the percentage of health the chopper has from 0-100.