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Component Lifecycle Query Filters #190

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xentripetal opened this issue Dec 5, 2023 · 0 comments

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enhancement postponed

xentripetal commented Dec 5, 2023

It would be very helpful if query descriptions had support for defining filters based on the lifecycle of components.

Mainly:

Added<T> - Evaluates to true when component T was added to an entity since the last execution of the query
Removed<T> - Evaluates to true when component T was removed from an entity since the last execution of the query
Changed<T> - Evaluates to true when component T was accessed mutably or set for the entity since the last execution of the query

This is a feature present in bevy_ecs (Rust), DefaultECS (C#), and Unity DOTS

I'm not sure how feasible this is with Arch's architecture, but figured I'd put the idea out there since I'd love to see it in Arch.

genaray added postponed enhancement labels

xentripetal mentioned this issue

Chunk-Components #170

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