View source for Logical entity

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{{seealso|[[:Category:Logical entities]]}}
Logical entity is an [[entity]] whose '''position in the map doesn't affect its functionality''' in any way. They affect the game, creating or adding to various environmental and game controlling systems, such as [[:Category:AI|AI]] managers, [[math_counter|math counters]], controlling [[env_fog_controller|fog]], [[shadow_control|dynamic shadows]], GUI elements, [[:Category:Choreography|choreography]] and more.

In [[FGD]] they are defined using either @PointClass (or @FilterClass in case of [[filters]]) and thus in [[Hammer]] placed by [[Hammer Entity Tool]].


If they don't need to directly or at all relay information to clients they are usually a subclass of [[CLogicalEntity]] thus not wasting an [[edict]] (some exceptions: {{ent|logic_auto}}, {{ent|logic_script}}, {{ent|logic_choreographed_scene}}) otherwise they are usually direct subclasses of [[CBaseEntity]], [[CPointEntity]] or [[:Category:CD CRulePointEntity|CRulePointEntity]].

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== Examples ==
=== Map properties ===
Entities that can be thought of as additional properties of the map and only one should exist at a given time.
* {{ent|water_lod_control}}
* {{ent|env_detail_controller}}
* {{ent|game_ragdoll_manager}}
* {{ent|shadow_control}}

=== Event detectors ===
Fires outputs based on some conditions occurring in-game like round starting, map loading for the first time or in certain gamemode.
* {{ent|logic_auto}}
* {{ent|logic_eventlistener}}
* {{l4ds}} {{ent|info_gamemode}} 

=== Game controlling systems ===
* {{ent|info_director}}
* {{ent|soundent}}
* {{ent|terror_gamerules}}
* {{ent|vote_controller}}
{{note|Many are spawned automatically by the game}}

=== I/O logic ===
* {{ent|logic_branch}}
* {{ent|logic_case}}
* {{ent|logic_relay}}
{{seealso|[[Logic gate]]}}

=== Filters ===
* {{ent|filter_activator_name}}
* {{ent|filter_activator_class}}
* {{ent|filter_multi}}
{{seealso|[[Filters]]}}

=== Speech ===
* {{ent|logic_choreographed_scene}}
* {{ent|logic_scene_list_manager}}

=== GUI elements ===
* {{ent|env_message}}
* {{ent|env_hudhint}}
* {{ent|game_text}}
* {{ent|game_text_tf}}

=== Postprocess ===
* {{ent|Color_correction_(entity)|alt=color_correction}}
* {{ent|env_dof_controller}}
* {{ent|postprocess_controller}}

=== Other ===
* {{ent|env_fog_controller}}
* {{ent|env_zoom}}
* {{ent|point_clientcommand}}
* {{ent|ambient_music}}
* {{ent|sound_mix_layer}}

== See also ==
* [[Point entity]]
* [[Brush entity]]
* [[Model entity]]
* Coding [[Your First Entity]]

[[Category:Glossary]]