Trigger look

Entity Description

A brush entity used to trigger something when the player looks at something.

It fires OnTrigger when the player looks at a target entity for the given amount of time while within the trigger volume. If the player leaves the trigger or looks away from the target entity, the clock resets.

If the Use Velocity instead of facing spawnflag is checked, the trigger uses the player's velocity instead of the player's view, so it determines whenever the player is moving toward the target entity; this is useful for triggering when players are driving a vehicle at something.

Note:Only designed for single-player games.

Note:As long as the player is touching the entity, facing the direction of the target entity will trigger it even if the target is not directly visible to the player (i.e. if there is world geometry in the way).

Note:In Portal, looking at the target entity through a portal will not fire the OnTrigger.

Availability

Template:In game Template:Game-base In code it is represented by class CTriggerLook, defined in triggers.cpp.

Keyvalues

• {| class="mw-collapsible mw-collapsed" style="background:initial;float:no;margin-bottom:1em;margin-left:0;padding-right:0.5em;border:1px solid rgba(255,255,255,0.1); border-left:solid 1px #8bb9e0; padding-left:1em;"

|+ style="text-align:left; white-space:nowrap; font-weight:bold; color:#ddd; " | BaseTrigger |

Filter Name (filtername) <filter>

A filter entity to test potential activators against.

Start Disabled (StartDisabled) <boolean>

Stay dormant until activated (with theEnableinput).

|}

• target

<target_destination> The name of the entity to be looked at.

• LookTime

<string> The time, in seconds, that the player must look the target before firing the output. Resets if player leaves trigger, or looks outside the Field of View threshold.

• FieldOfView

<string> How close the player has to be looking at the target. 1.0 = straight ahead\n 0.0 = +/- 90 degrees\n -1.0 = all directions).

• Timeout

<float> The time, in seconds, to wait after player enters the trigger before firing the OnTimeout output, 0 = never.

Flags

• {| class="mw-collapsible mw-collapsed" style="background:initial;float:no;margin-bottom:1em;margin-left:0;padding-right:0.5em;border:1px solid rgba(255,255,255,0.1); border-left:solid 1px #8bb9e0; padding-left:1em;"

|+ style="text-align:left; white-space:nowrap; font-weight:bold; color:#ddd; " | 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.

|}

• 128 : Fire Once
• 256 : Use Velocity instead of facing

Inputs

• {| class="mw-collapsible mw-collapsed" style="background:initial;float:no;margin-bottom:1em;margin-left:0;padding-right:0.5em;border:1px solid rgba(255,255,255,0.1); border-left:solid 1px #8bb9e0; padding-left:1em;"

|+ style="text-align:left; white-space:nowrap; font-weight:bold; color:#ddd; " | BaseTrigger |

Toggle

Toggles this trigger between enabled and disabled states.

Enable

Enable trigger

Disable

Disable trigger

TouchTest  (in all games since )

Triggers either the OnTouching or OnNotTouching outputs for whether anything is touching this entity.

Bug:Sleeping prop_physics will never fire "OnTouching". Also applies to entities using prop_physics as base.  (tested in: )

StartTouch  (in all games since ) !FGD

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

EndTouch  (in all games since ) !FGD

Behave as if !caller had just exited the trigger volume.

DisableAndEndTouch  (only in )

Disables this trigger and calls EndTouch on all currently-touching entities.

|}

Outputs

• {| class="mw-collapsible mw-collapsed" style="background:initial;float:no;margin-bottom:1em;margin-left:0;padding-right:0.5em;border:1px solid rgba(255,255,255,0.1); border-left:solid 1px #8bb9e0; padding-left:1em;"

|+ style="text-align:left; white-space:nowrap; font-weight:bold; color:#ddd; " | BaseTrigger |

OnStartTouch

!activator = entity that caused this output
!caller = this entity
Fired when a valid entity starts touching this trigger.

OnStartTouchAll

!activator = entity that caused this output
!caller = this entity
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.

OnEndTouch

!activator = entity that caused this output
!caller = this entity
Fired when a valid entity stops touching this trigger.

Note:Will also fire for entities touching it when trigger is disabled via Disable input

Warning:This includes entities which are deleted while inside the trigger. In this case !activator will be invalid.

Warning:OnEndTouch can fire before OnStartTouch under certain circumstances^[How?] where both are fired on the same tick and each have the same delay.

Fix:Add a slight delay to OnEndTouch.

OnEndTouchAll

!activator = entity that caused this output
!caller = this entity
Fired when all valid entities stop touching this trigger.

OnTouching  (in all games since )

!activator = !caller = this entity
Fired if something is currently touching this trigger when TouchTest is fired.

OnNotTouching  (in all games since )

!activator = !caller = this entity
Fired if nothing is currently touching this trigger when TouchTest is fired.

|}

• OnTimeout

Fired after the timeout interval expires if the player never looked at the target.