Trigger brush

This entity is obsolete. Its use is discouraged. It may only exist/function in older engine branches.

This entity is not in the FGD by default.
See below for instructions on making it available.

Class hierarchy
CTriggerBrush ↳CBaseEntity
modelentities.cpp

trigger_brush is a brush entity available in all Source games. Deprecated entity during the development of Half-Life 2, its sole difference compared to other entities is that a OnUse output ↓ exists which may be useful when combined with player event targetnames (such as game_playerdie).

Note:The brush is fully solid unlike other trigger entities.

Note:Use func_button instead to detect players using +use, it behaves like trigger_brush but is more likely to work on any version of Source.

Keyvalues

Name (targetname) <string>[ Edit ]

The name that other entities refer to this entity by, via Inputs/Outputs or other keyvalues (e.g. parentname or target).
Also displayed in Hammer's 2D views and Entity Report.

See also:  Generic Keyvalues, Inputs and Outputs available to all entities

Input Filter (InputFilter) <choices>

Used to specify which inputs this entity will accept.

• 0: Allow all inputs
• 1: Ignore Players
• 2: Ignore NPCs
• 4: Ignore Pushables
• 8: Ignore Touch/Untouch
• 16: Ignore Use
• 32: Ignore All

Don't alert parent (DontMessageParent) <boolean>

Decides whether to forward OnStartTouch, OnEndTouch outputs or Use input to parented entity.

Inputs

Use

Fires the OnUse output.

EnableDisable:

Enable / Disable

Enable/disable this entity from performing its task. It might also disappear from view.

Outputs

OnUse

!activator = activator of the Use input
!caller = this entity
Fired when the Use input is given.

OnStartTouch

!activator = entity that touched this trigger
!caller = this entity
Fired when an entity starts touching this trigger. The touching entity must pass this trigger's InputFilter to cause this output to fire.

OnEndTouch

!activator = entity that stopped touching this trigger (may be NULL if the entity was killed)
!caller = this entity
Fired when an entity stops touching this trigger. Only entities that passed this trigger's InputFilter will cause this output to fire.

FGD Code

Todo: add InputFilter keyvalue

@SolidClass base(Targetname, Parentname, Global, Inputfilter, EnableDisable) = trigger_brush
[
	DontMessageParent(integer) : "Don't alert parent" : 0 : "When 0 forwards OnStartTouch, OnEndTouch outputs or Use input to parented entity"

	input Use(void) : "Fires the OnUse output."

	output OnUse(void) : "Fired when the Use input is given. "
	output OnStartTouch(void) : "Fired when an entity starts touching this trigger. The touching entity must pass this trigger's InputFilter to cause this output to fire."
	output OnEndTouch(void) : "Fired when an entity stops touching this trigger. Only entities that passed this trigger's InputFilter will cause this output to fire."
]

Convars

Cvar/Command	Parameters or default value	Descriptor	Effect
showtriggers	0	bool	If this is true when this entity spawns its brush will be visible.

See also

• logic_eventlistener