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

Entity description

A brush entity trigger that dissolves weapons forcefully dropped by trigger_weapon_strip within its volume. It is used by the Confiscation Field in both Half-Life 2 and Episode One to dissolve all the player's weapons except the Gravity Gun, supercharging it instead.

For proper functionality, both brush entities must be used.

This entity in Half-Life 2: Deathmatch cannot start it's supercharging sequence of the Gravity Gun, as the gun removes itself even when dropped by trigger_weapon_strip.

Icon-Bug.pngBug:The game will crash if a weapon targeted for dissolving by this entity is removed by other means.

In code, it is represented by theCTriggerWeaponDissolveclass, defined in thehl2_dll\hl2_triggers.cppfile.


Emitter Name (???) <targetname>
Name of a single or multiple entities to use as the basis for the emitted effects.


Filter Name (filtername) <filter>
A filter entity to test potential activators against.
Start Disabled (StartDisabled) <boolean>
Stay dormant until activated (with theEnableinput).


  •  [1] : Clients (Survivors, Special Infected, Tanks Left 4 Dead series)
  •  [2] : NPCs (Common Infected, Witches Left 4 Dead series)
  •  [8] : Physics Objects
  •  [16] : Only player ally NPCs
  •  [32] : Only clients in vehicles
  •  [64] : Everything (not including physics debris)
  •  [512] : Only clients *not* in vehicles
  •  [1024] : Physics debris
  •  [2048] : Only NPCs in vehicles (respects player ally flag)
  •  [4096] : Disallow Bots


Stops all sounds.

Toggles this trigger between enabled and disabled states.
Enable trigger
Disable trigger
TouchTest  (in all games since Source 2007)
Triggers either the OnTouching or OnNotTouching outputs for whether anything is touching this entity.
StartTouch  (in all games since Source 2007) !FGD
Behave as if the !caller entity had just entered the trigger volume. Accepts non-physical entities.
EndTouch  (in all games since Source 2007) !FGD
Behave as if !caller had just exited the trigger volume.
DisableAndEndTouch  (only in Source 2013 Multiplayer(Team Fortress 2))
Disables this trigger and calls EndTouch on all currently-touching entities.


Fires when one weapon is starting to dissolve in the trigger volume.
Fires when the trigger begins to charge the physcannon.


Fired when a valid entity starts touching this trigger. !activator is whatever touches the trigger.
Fired when a valid entity starts touching this trigger, and no other entities are touching it. If there are any other entities touching the trigger when a new one begins to touch, only OnStartTouch will fire.
Fired when a valid entity stops touching this trigger.
Warning.pngWarning:This includes entities which are deleted while inside the trigger. In this case !activator will be invalid.
Fired when all valid entities stop touching this trigger.
OnTouching  (in all games since Source 2007)
Fired if something is currently touching this trigger when TouchTest is fired.
OnNotTouching  (in all games since Source 2007)
Fired if nothing is currently touching this trigger when TouchTest is fired.