Trigger look: Difference between revisions
Jump to navigation
Jump to search
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).
Bug:If multiple entities in the map have the same name as the target entity, then OnTrigger may fire inconsistently. The output may either be delayed or never fire at all. These effects seem to worsen the more identically named entities there are in the map. [todo tested in ?]
Yar Kramer (talk | contribs) |
No edit summary |
||
| (25 intermediate revisions by 15 users not shown) | |||
| Line 1: | Line 1: | ||
{{ | {{LanguageBar}} | ||
{{ | {{CD|CTriggerLook|file1=triggers.cpp}} | ||
{{this is a|brush entity|name=trigger_look}} It is 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. | 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. | ||
| Line 12: | Line 8: | ||
{{note|Only designed for single-player games.}} | {{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|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).}} | ||
{{ | {{bug|In {{portal|4}}, looking at the target entity through a portal will ''not'' fire the OnTrigger output.}} | ||
{{bug|If multiple entities in the map have the same name as the target entity, then OnTrigger may fire inconsistently. The output may either be delayed or never fire at all. These effects seem to worsen the more identically named entities there are in the map.}} | |||
{{in | |||
==Keyvalues== | ==Keyvalues== | ||
{{KV Targetname}} | |||
{{KV|Look Target|intn=target|target_destination|The name of the entity to be looked at.}} | |||
{{KV|LookTime|intn=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.}} | |||
:{{Bug|A value of 1.0 will prevent the entity from triggering at all, even if the player is looking directly at target.}} | |||
{{KV|FieldOfView|intn=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).}} | |||
{{KV|Timeout|intn=Timeout|float|The time, in seconds, to wait after player enters the trigger before firing the OnTimeout output, 0 {{=}} never.}} | |||
{{KV|Use LOS|intn=UseLOS|boolean|Use LOS calculations|only=mapbase}} | |||
{{KV Trigger}} | |||
==Flags== | ==Flags== | ||
{{Fl|128|Fire Once}} | |||
{{Fl|256|Use Velocity instead of facing}} | |||
{{Fl Trigger}} | |||
==Inputs== | ==Inputs== | ||
{{I Trigger}} | |||
==Outputs== | ==Outputs== | ||
{{O|OnTimeout|Fired after the timeout interval expires if the player never looked at the target.}} | |||
{{O Trigger}} | |||
{{sensor brush}} | |||
[[Category:IO System]] | |||
==See also== | |||
[https://www.youtube.com/watch?v=vNhKk1gosCI: About the Trigger_Look] | |||
Latest revision as of 03:47, 29 June 2025
 Class hierarchy
|
|---|
| CTriggerLook |
| triggers.cpp
|
trigger_look is a brush entity available in all 
Source games. It is 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).
Bug:If multiple entities in the map have the same name as the target entity, then OnTrigger may fire inconsistently. The output may either be delayed or never fire at all. These effects seem to worsen the more identically named entities there are in the map. [todo tested in ?]Keyvalues
- Name (targetname) <string>[ Edit ]
- The name that other entities refer to this entity by, via Inputs/Outputs or other keyvalues (e.g.
parentnameortarget).
Also displayed in Hammer's 2D views and Entity Report.See also: Generic Keyvalues, Inputs and Outputs available to all entities
- Look Target (target) <targetname>
- The name of the entity to be looked at.
- LookTime (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.
- Bug:A value of 1.0 will prevent the entity from triggering at all, even if the player is looking directly at target. [todo tested in ?]
- FieldOfView (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 (Timeout) <float>
- The time, in seconds, to wait after player enters the trigger before firing the OnTimeout output, 0 = never.
- Use LOS (UseLOS) <boolean> (only in
) - Use LOS calculations
|
Flags
- Fire Once : [128]
- Use Velocity instead of facing : [256]
|
Inputs
|
Outputs
- OnTimeout
- Fired after the timeout interval expires if the player never looked at the target.
|
