class

ECS::System

Inherits Reference / Object

Сontainer for logic for processing filtered entities. User systems should inherit from ECS::System and implement init, execute, teardown, filter, preprocess and process (in any combination. Just skip methods you don't need).

Constructors

new(world : ECS::World)

Constructor. Called before init

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Instance methods

active

Set active property to false to temporarily disable system

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active=(active : Bool)

Set active property to false to temporarily disable system

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execute

Will be called on each ECS::Systems.execute call

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filter(world : World) : Filter | Nil

Called once during ECS::Systems.init, after #init call. If this method is present, it should return a filter that will be applied to a world It can also return nil that means that no filter is present and #process won't be called Example:

def filter(world : World)
  world.of(Component1)
end

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init

Will be called once during ECS::Systems.init call

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preprocess

Will be called on each ECS::Systems.execute call, before #process and #execute

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process(entity : Entity)

Called during each ECS::Systems.execute call, before #execute, for each entity that match the #filter

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teardown

Will be called once during ECS::Systems.teardown call

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