A trigger selector is responsible for selecting a single trigger based on some criteria. For example, when the player presses a button to use a trigger the trigger selector is responsible for picking the best trigger within the player's range.
Assets/Create/Devdog to create a trigger selector scriptable object.
Third person games
When building a third person game your character can generally use trigger (object) within the player's range. This is generally based on the player's location and viewing direction (favoring items in front of the player). For this exact use case there's a built-in trigger selector called the
First person games
When building a first person game you generally want to select the trigger your player is directly looking at. This can be done through the
Custom trigger selector
You can also implement your own custom trigger selector by inheriting from
BestTriggerSelectorBase. The trigger selector will receive the character in question and all of it's in range triggers.