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Many entities can use a filter: an entity that examines each potential activation/activator and discards it unless it matches certain criteria. A list of all filter entities is lower down this page.

Tip.png Tip: Filters can be combined with filter_multi.


For Programmers

Programmers do not need to use filter entities, since they already have direct access to all of the requisite data. Source's C++ filter classes are instead used to decide where data should be sent.


Filters can't be disabled by other entities Outputs. Only killed.