Trigger once: Difference between revisions

Latest revision as of 08:22, 23 April 2025

Class hierarchy
CTriggerOnce ↳CTriggerMultiple ↳CBaseTrigger ↳CBaseToggle ↳CBaseEntity
`triggers.cpp`

trigger_once is a brush entity available in all Source games. It is a trigger volume that removes itself after it has been triggered (touched by a qualifying entity) once. A trigger uses outputs to activate an event in another entity.

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

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

Flags

BaseTrigger
Everything (not including physics debris) `: [64]` Clients (Survivors, Special Infected, Tanks ) `: [1]` Only clients in vehicles `: [32]` Only clients not in vehicles `: [512]` Disallow Bots (removed since ) `: [4096]` NPCs (Common Infected, Witches ) `: [2]` Only player ally NPCs `: [16]` Only NPCs in vehicles (respects player ally flag) `: [2048]` Physics Objects (not including physics debris) `: [8]` Physics debris (include also physics debris) `: [1024]` ~~Pushables (Passes entities with classname `func_pushable`) `: [4]`~~ Deprecated. Equivalent to using Everything + `filter_activator_class` that filters `func_pushable`.

Inputs

Toggle: Toggles this trigger between enabled and disabled states.

Enable: Enable trigger

Disable: Disable trigger

StartTouch (in all games since ) !FGD

Behave as if the !caller entity had just entered the trigger volume. Accepts non-physical entities.

Note:Will trigger OnStartTouch output and the trigger won't be removed.

Warning:If !caller doesn't exist game will crash

Outputs

OnStartTouch

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

Important:If the trigger_once is enabled while multiple entities that can trigger it are touching it each output will have different outcomes. OnStartTouch will fire for each !activator. Meanwhile OnTrigger will only trigger once.

Note: The refire amount will decide how many times your OnStartTouch will fire.

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+{{LanguageBar}}
-{{wrongtitle|title=trigger_once}}
+{{TabsBar}}
+{{CD|CTriggerOnce|file1=triggers.cpp}}
+{{This is a|brush entity|name=trigger_once}} It is a trigger volume that removes itself after it has been triggered (touched by a qualifying entity) once. A [[trigger]] uses [[outputs]] to activate an [[event]] in another [[entity]].
-== Entity description ==
+{{sensor brush}}
-A trigger [[Entity#Brush_entities|volume]] that removes itself after it is triggered once (touched by a qualifying entity). A trigger uses outputs to activate an event in another entity.
 == Keyvalues ==
-* {{kv triggeronce}}
+{{KV Targetname}}
+{{KV BaseTrigger}}
 == Flags ==
-* {{fl triggeronce}}
+{{Fl BaseTrigger}}
 == Inputs ==
-* {{i triggeronce}}
+{{I|Toggle|Toggles this trigger between enabled and disabled states.}}
+{{I|Enable|Enable trigger}}
+{{I|Disable|Disable trigger}}
+{{I|StartTouch|Behave as if the {{ent|!caller}} entity had just entered the trigger volume. Accepts non-physical entities.|since={{Src07}}|nofgd=1}}
+::{{note|Will trigger OnStartTouch output and the trigger won't be removed.}}
+::{{warning|If !caller doesn't exist game will crash}}
 == Outputs ==
-* {{o triggeronce}}
+{{O|OnStartTouch}}
+{{O|OnTrigger|activator = entity that touched the trigger|Fired when an entity starts touching this trigger. The touching entity must pass this trigger's filters to cause this output to fire.}}
+{{Important|If the [[trigger_once]] is enabled while multiple entities that can trigger it are touching it each output will have different outcomes. OnStartTouch will fire for '''each''' [[!activator]]. Meanwhile OnTrigger will only trigger '''once'''.{{Note| The refire amount will decide how many times your OnStartTouch will fire.}}}}
 == See also ==
@@ Line 21: / Line 30: @@
 * [[Inputs and Outputs]]
-[[Category:Entities]]
+[[Category:IO System]]
-[[Category:Brush Entities]]

Trigger once: Difference between revisions

Latest revision as of 08:22, 23 April 2025

Contents

Keyvalues

Flags

Inputs

Outputs

See also

Navigation menu

Trigger once: Difference between revisions

Latest revision as of 08:22, 23 April 2025

Keyvalues

Flags

Inputs

Outputs

See also

Navigation menu

Search