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Wiki » Reference » trigger_ entities » trigger_event
ARTICLE

trigger_event

This is an entity on id Tech 4 engines, present on Prey. Below you can find its spawnflags, keys and editor settings for each game that defines it.

Prey

Used to call a different event on targets instead of EV_Activate.

Keys

Key Type Default Description
eventDef var event of targets to call. Passes in activator as parm.
random var 0 wait variance. trigger waits wait + or - random after firing targets before triggering again.
delay var 0 seconds to wait before firing after triggered.
randomDelay var delay variance. trigger waits delay + or - random_delay before firing targets.
call var script function to call when triggered.
uncall var script function to call when untriggered
callRef var script function to call when triggered which takes trigger/entity reference as parm.
uncallRef var script function to call when untriggered which takes trigger/entity reference as parm.
callRefActivator var script function to call when triggered which takes trigger/entity and activator/entity reference as parms.
uncallRefActivator var script function to call when untriggered which takes trigger/entity and activator/entity reference as parms.
uncalldelay var seconds between checks to see if uncall has arrived
requires var item required in players inventory to fire.
removeItem var if above item is removed from inventory when used.
anyTouch var 0 anything can touch it, players, mobs.
noTouch var 0 cannot be touched, must be triggered.
triggerFirst var dont activate until triggered.
noClient var 0 can't be touched by players, but can be touched by other entities (func_activators, for instance).
refire var seconds to wait before re-firing the trigger (as long as you are still in it) (default -1 = off)
triggerBehavior var describes what can trigger the trigger. 0 is player only, 1 is friendlies only, 2 is monsters only, 3 is player, monsters, and friendlies, 4 is trigger_classes. Default: 0. players, monsters, characters, and func_activtors can trigger triggers
enabled bool initially enabled (default 1)
untrigger var when untriggered, resend the trigger message to targets
isSimpleBox bool simple boxes are cheaper and use axis-aligned bounds for checks (1)
noVehicles bool disallows trigger from player vehicles (0)

Editor

Property Value
Type brush entity
Spawn class hhTrigger_Event -> hhTrigger -> idEntity -> idClass
Inherits trigger_multiple
Color 0.75 0.0 1.0

Script events

Event Declared by
enable hhTrigger
disable hhTrigger
activate hhTrigger
deactivate hhTrigger
moveToJoint idEntity
moveToJointWeighted idEntity
moveJointToJoint idEntity
moveJointToJointOffset idEntity
setSkin idEntity
spawnDebris idEntity
delayDamageEntity idEntity
dispose idEntity
setDeformation idEntity
setFloatKey idEntity
setVectorKey idEntity
setEntityKey idEntity
playerCanSee idEntity
setContents idEntity
setClipmask idEntity
setPortalCollision idEntity
killbox idEntity
getName idEntity
setName idEntity
findTargets idEntity
activateTargets idEntity
numTargets idEntity
getTarget idEntity
randomTarget idEntity
bindToJoint idEntity
removeBinds idEntity
bind idEntity
bindPosition idEntity
unbind idEntity
setOwner idEntity
setModel idEntity
getShaderParm idEntity
setShaderParm idEntity
setShaderParms idEntity
setColor idEntity
getColor idEntity
isHidden idEntity
hide idEntity
show idEntity
cacheSoundShader idEntity
startSoundShader idEntity
startSound idEntity
stopSound idEntity
fadeSound idEntity
getWorldOrigin idEntity
setWorldOrigin idEntity
getOrigin idEntity
setOrigin idEntity
getAngles idEntity
setAngles idEntity
getLinearVelocity idEntity
setLinearVelocity idEntity
getAngularVelocity idEntity
setAngularVelocity idEntity
getSize idEntity
setSize idEntity
getMins idEntity
getMaxs idEntity
touches idEntity
setGuiParm idEntity
setGuiFloat idEntity
getNextKey idEntity
setKey idEntity
getKey idEntity
getIntKey idEntity
getFloatKey idEntity
getVectorKey idEntity
getEntityKey idEntity
restorePosition idEntity
updateCameraTarget idEntity
distanceTo idEntity
distanceToPoint idEntity
startFx idEntity
waitFrame idEntity
wait idEntity
hasFunction idEntity
callFunction idEntity
setNeverDormant idEntity
playRumble idEntity
stopRumble idEntity
remove idClass

Last changed Sep 21, 2026
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