trigger_proximity
trigger_proximity
is a brush entity available in all Source games. It measures the distance of an entity within the trigger volume from a given point (and within a given radius). The NearestEntityDistance output will be 0 when the entity is at the center point, and 1 when the entity is at the radius.
Note:This entity cannot reliably detect when an entity exits the radius, which makes it only useful for detecting when one entity approaches another. This is due to the
NearestEntityDistance
output only firing while the entity is inside the radius, and that it sends a parameter of only 0 or 1, depending on if the entity is near the center (0) or at the edge (1). These are the only times that the parameter changes. Use the OnEndTouch
output of trigger_multiple instead to detect when the entity moves away.Tip:The main use of this entity is to detect proximity to a dynamic entity that can rotate, since the detection area is a consistent sphere. Spherical parented triggers are possible, but spherical brushes are not recommended.
Note:This entity does NOT work well in MP maps. It will function, but it will then break all other triggers in the map if you have multiple players in the map. Solo will show all the triggers working correctly though.
Contents
Keyvalues
- Point to Measure From
([todo internal name (i)])
<targetname> - The name of the target entity, the origin of which is the point to measure another entity's distance from.
- Radius to measure within
([todo internal name (i)])
<string> - The radius to which the distance should be mapped. Entities outside the radius will be ignored.
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Flags
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Inputs
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Outputs
NearestEntityDistance
<integer>- Fired continuously when entities are touching the trigger volume.
The output parameter is the distance from the Point to Measure From to the nearest entity that passed the trigger filters.
The distance is mapped to the radius distance, so it will be 0 when the entity is on the point, and 1 when the entity is at the edge of the radius.
Bug:Spamming crouch jumps in a trigger can randomly fire OnStartTouch . Confirm:Is it a Multiplayer issue only? [todo tested in?]
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 where both are fired on the same tick and each have the same delay. Fix:Add a slight delay to OnEndTouch .Bug:Spamming crouch jump in a trigger can randomly fire OnEndTouch . Confirm:Is it a Multiplayer issue only? [todo tested in?]
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