Grenade tow

This entity is not in the FGD by default.
It should not be put directly in a map because it can only be configured through code in Steam versions of the game. You still can use it in mod version of the game via Hammer.

grenade_tow is a point entity available in Black Mesa. The grenade entity that used by func_tow and func_tow_mp. A TOW missile that launched by  BGM-71 TOW cannon, it lies straight until it hits a surface, and then explodes. It have homing feature in the mod version via SetTarget input, this feature not available in Steam versions of the game. Most inputs and outputs are same as CBaseAnimating. Used CBlackMesaBaseProjectile as a base class in Steam versions, CBaseCombatCharacter used in the mod version.

Note:It explodes if hits skybox in the mod version. In Steam versions, it just disappears.

Bug:This grenade entity can stuck at dynamic (not physics) objects, such as prop_dynamic. In such situation, missile will not move until it explodes or disappear by itself. Usually happens with objects that have a dynamic collision, or objects that are in motion.

Tip:If you need to fix this issue, use trigger_weaponfire that will kill stucked missiles, this trigger should be toggled by logic_timer every 0.5-1.0 seconds.

Example.

Example with this metal door. The door is prop_dynamic with dynamic collision (required for animations).

Inputs

Deploy <void>

Fired by this entity when appears. Deploys model of this grenade.

SetTarget <stringRedirectInput/string> (only in )

Sets specified target and enables homing.

StopHoming <void> (only in )

Stops homing.

StartHoming <void> (only in )

Enables homing again.

SetTimer <floatRedirectInput/float> (only in )

Sets amount of time before detonate.

Detonate <void> (only in )

Detonates grenade.

SetThrower <void> (only in )

Doesn't do anything and not used for this entity at all.

Outputs

OnDetonate <void> (only in )

Fired by this entity when detonated.

Dedicated ConVars

Black Mesa: Definitive Edition

Cvar/Command	Parameters or default value	Descriptor	Effect
sk_detenator_tow_track_acceleration	300	arbitrary number	Missile acceleration. Bug:Large values may cause missile to disappear.
sk_detenator_tow_max_speed	3000	arbitrary number	Max missile speed.
sk_detenator_tow_intial_speed	1500	arbitrary number	Intial missile speed. Bug:Large values may cause missile to disappear.
sk_detenator_tow_plr_dmg	150	arbitrary number	Missile damage scale if it is launched by the player.
sk_detenator_tow_plr_dmg_radius	375	arbitrary number	Missile damage radius if it is launched by the player.
sk_detenator_tow_npc_dmg	150	arbitrary number	Missile damage scale if it is launched by NPC.
sk_detenator_tow_npc_dmg_radius	375	arbitrary number	Missile damage radius if it is launched by NPC.

Black Mesa (mod) (the mod version)

Cvar/Command	Parameters or default value	Descriptor	Effect
sk_plr_dmg_grenade_tow	150	arbitrary number	Missile damage scale if it is launched by the player.
sk_npc_dmg_grenade_tow	150	arbitrary number	Missile damage scale if it is launched by NPC.
sk_grenade_tow_airspeed	1500	arbitrary number	Missile air speed.
sk_grenade_tow_precision	1	arbitrary number	TOW precision. Doesn't work.