Func tank

 func_tank is a brush entity available in the Half-Life 2 series.

Entity description

A brush entity that functions as a gun turret.

In code it is represented by class CFuncTank, defined in hl2_dll\func_tank.cpp.

www.editlife.net used to have a tutorial on making npc and player usable turrets, which you can read in the Internet Archive here.

Keyvalues

BaseTank:

Bullets (bullet) <choices>

Ammo type. Be aware that some games will use Ammo type instead.

Literal value	Description
0	None
1	Pistol
2	SMG1
3	AR2 (shows pistol/smg1 bullets?)
4	Laser (does nothing)

Ammo type (ammotype) <choices>

Ammo type. Be aware that some games will use Bullets instead.

Value	Description
	None
Pistol	Pistol
SMG1	SMG1
AR2	AR2
CombineHeavyCannon	Combine Heavy Cannon (Episode 2 autogun)

Control Volume (control_volume) <targetname>

Name of a trigger the player must be inside to control the tank.

(Team) Master (master) <string>

Not used for Source. Provided for backwards compatibility with multisource or game_team_master.

Yaw rate (yawrate) <string>

How fast tank can look left or right.

Yaw range (yawrange) <string>

How far tank can turn left or right.

Yaw tolerance (yawtolerance) <string>

Additional left-right range. If the gun tries to turn beyond Yaw range + Yaw tolerance, the gun will snap back to the maximum Yaw range.

Pitch rate (pitchrate) <string>

How fast tank can look up or down

Pitch range (pitchrange) <string>

How far tank can turn up or down

Pitch tolerance (pitchtolerance) <string>

Additional up-down range. If the gun tries to turn beyond Pitch range + Pitch tolerance, the gun will snap back to the maximum Pitch range.

Barrel Length (barrel) <string>

Solid length of the tank barrel. Any part of the barrel beyond this length may clip through objects.

Barrel Horizontal (barrely) <string>

How wide the barrel is, horizontally.}

Barrel Vertical (barrelz) <string>

How wide the barrel is, vertically.

Smoke Sprite (spritesmoke) <sprite>

Smoke sprite to emit when gun fires.

 Bug: Transparency may not work.

Flash Sprite (spriteflash) <sprite>

Flash sprite to emit when gun fires.

Sprite scale (spritescale) <string>

Sprite scale for both sprites above.

Rotate Start Sound (rotatestartsound) <sound>

Sound to play when tank starts to turn.

Rotate Loop Sound (rotatesound) <sound>

Sound to play when tank is turning.

Rotate Stop Sound (rotatestopsound) <sound>

Sound to play when tank stops turning.

Rate of Fire (firerate) <string>

Number of bullets to fire in a second.

Damage Per Bullet (bullet_damage) <string>

How much a single bullet hurts everything except the player. If 0, takes amount from the type of bullet/damage.

Damage Per Bullet Vs Player (bullet_damage_vs_player) <string>

How much a single bullet hurts the player only. If 0, takes amount from the type of bullet/damage.

Firing persistence (persistence) <string>

How many seconds to keep firing at target's last known position after losing LOS (for NPCs).

Firing persistence2 (persistence2) <string>

After Firing persistence is over, how many seconds to periodically fire at target's last known position (for NPCs).

Bullet accuracy (firespread) <choices>

How accurately the gun can fire.

• 0: Perfect Shot
• 1: Small cone
• 2: Medium cone
• 3: Large cone
• 4: Extra-large cone

Minimum target range (minRange) <string>

Minimum range to target something (for NPCs). If a target is closer than this amount, the NPC will probably switch to any weapon they have on them.

Maximum target range (maxRange) <string>

Maximum range to target something (for NPCs).

Confirm:This may actually be the distance for aim assistance instead?

Gun Base Attachment (gun_base_attach) <string>

If Parent is specified, this is the attachment point on the parent to aim from.

Gun Barrel Attachment (gun_barrel_attach) <string>

If Parent is specified, this is the attachment point on the parent to fire from. If you specify this, you'll want to specify the Gun Base Attachment too.

Gun Yaw Pose Param (gun_yaw_pose_param) <string>

If Parent and Gun Pitch Pose Param are specified, then the gun itself will be invisible and the tank will steer a gun on the parent using the pose parameters.

Gun Yaw Pose Center (gun_yaw_pose_center) <float>

The center yaw pose parameter of the gun on the parent.

Gun Pitch Pose Param (gun_pitch_pose_param) <string>

If Parent and Gun Yaw Pose Param are specified, then the gun itself will be invisible and the tank will steer a gun on the parent using the pose parameters.

Gun Pitch Pose Center (gun_pitch_pose_center) <float>

The center pitch pose parameter of the gun on the parent.

Ammunition Count (ammo_count) <integer>

Amount of ammo when player is using. -1 = unlimited ammo.

Lead Target (LeadTarget) <boolean>

Aim ahead to hit moving targets (for NPCs).

NPC Man Point (npc_man_point) <targetname>

Point where NPC must stand to use.

Post-NPC Attack Grace Period (playergraceperiod) <float>

If specified, NPC's manning this func tank won't fire at the player, after firing at a non-player, for this amount of time.

Ignore Grace Upto (ignoregraceupto) <float>

The player grace period is ignored if the player is under this distance from the tank.

Player Lock Time (playerlocktimebeforefire) <float>

The tank must be aiming right on the player for this amount of time before it's allowed to fire.

Effect Handling (effecthandling) <choices>

Produce these sound and particle effects when firing.

• 0: Use Individual Settings.
• 1: AR2
• 2: Combine Cannon

Bullet type <choices>

Obsolete. If you are mapping for HL2, and don't see this keyvalue, it's probably because you updated hammer for Episode 1. Simply add in a keyvalue named "bullet" without SmartEdit. This keyvalue must be used with HL2. This is also the case for Portal 2.

Literal value	Description
0	None
1	Pistol
2	SMG1
3	AR2
4	Laser

Ammo type <choices>

Ammo type. Cannot be used with HL2 or Portal 2 (see above).

Value	Description
	None
Pistol	Pistol
SMG1	SMG1
AR2	AR2
CombineHeavyCannon	Combine Heavy Cannon

Flags

BaseTank:

• 1: Active
• 16: Only Direct: The tank will only fire if it's target is in direct line of sight.
• 32: Controllable (by player)
• 64: Damage Kick
• 1024: NPC Controllable
• 2048: NPC Set Controller
• 4096: Allow friendlies to hit player
• 32768: Non-solid.
• 131072: Perfect accuracy every 3rd shot at player

• 8192 : Ignore range when making viewcone checks
• 256 : Aiming Assistance (Player Only)

Inputs

BaseTank:

Activate

Turn the tank on.

Deactivate

Turn the tank off (go dormant).

SetFireRate <float>

How fast to fire (0 = don't fire).

SetDamage <integer>

Set the Damage Per Bullet keyvalue.

SetTargetPosition <vector>

World position (coordinates) that to aim at

SetTargetDir <vector>

Direction (pitch yaw roll) to aim at.

SetTargetEntityName <targetname>

"Set the entity I should follow/attack to the closest entity matching this name."^[Clarify]

SetTargetEntity <entity>

"Set the entity I should follow/attack to the passed in entity. This requires an output which passes an entity through the output."^[Clarify]

ClearTargetEntity

Clear the entity memory of any targets it was told to attack.

FindNPCToManTank <string>

Find a nearby capable NPC to man this tank.

StartFindingNPCs

Start searching for capable NPCs to man this tank.

StopFindingNPCs

Stop searching for capable NPCs to man this tank.

ForceNPCOff

Force the NPC manning this tank (if any) to leave.

SetMaxRange <float>

Set the max range of the tank.

Confirm:Maximum distance a shot can go?

Outputs

BaseTank:

OnFire

Fires when the tank fires its bullets.

OnAquireTarget

Fires when target is newly in range and can be shot.

OnLoseTarget

Fires when when target goes out of range.

OnAmmoDepleted

DO NOT USE. Exists in code, but never coded to fire at any point.

OnGotController

Fires when an NPC starts to control this tank. Players do NOT fire this input.

OnGotPlayerController

Fires when a Player starts to control this tank. NPCs do NOT fire this input.

OnLostController

Fires when the NPC controller of the tank stops controlling it. Players do NOT fire this input.

OnLostPlayerController

Fires when the Player controller of the tank stops controlling it. NPCs do NOT fire this input.

OnReadyToFire

Fires once when the tank spawns, or is done waiting to fire between rounds. Useful for playing a reloading/charging/searching sound possibly.

Tutorials about Func_Tank (Russian)

Lessons created by Project-S

• Func_tank Пулемёты ч1 (на Русском)
• Func_Tank + MODEL Ч2 (На Русском)