Grenade tow

Class hierarchy
CGrenade_Tow ↳CBlackMesaBaseProjectile ↳CBlackMesaBaseDetonator ↳CBaseAnimating ↳CBaseEntity

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 model 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.

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).

(not in )

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	Float	Missile acceleration. Bug:Large values may cause missile to disappear.
sk_detenator_tow_max_speed	3000	Float	Max missile speed.
sk_detenator_tow_intial_speed	1500	Float	Intial missile speed. Bug:Large values may cause missile to disappear.
sk_detenator_tow_plr_dmg	150	Float	Missile damage scale if it is launched by the player.
sk_detenator_tow_plr_dmg_radius	375	Float	Missile damage radius if it is launched by the player.
sk_detenator_tow_npc_dmg	150	Float	Missile damage scale if it is launched by NPC.
sk_detenator_tow_npc_dmg_radius	375	Float	Missile damage radius if it is launched by NPC.

Black Mesa (mod)

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