Event Requeuing (EventReader/EventWriter)

[Wolftousen]

I'm curious how to go about requeuing events with EventReader/EventWriter.

For example, I made snake as a "learn bevy" project and got everything working. I then decided I wanted to add fruits that do different things and my first one was, grow 3 instead of 1. The way I originally planned to do this was by queuing a Grow(3) event where struct Grow (i32) is the event type. Then when I read that event, I grow and queue a new event Grow(2) and so on until I have no grow amount left.

I ran into the issue that you cannot send mut EventReader and mut EventWriter to a system and will cause a runtime panic.

I'm curious what the ideal/expected solution for this would be if anyone knows.

[alice-i-cecile]

You can work with ManualEventReader<T> (I think) or the raw ResMut<Events<T>> to do this. This isn't the first time this has come up; I think there should be an example demonstrating this functionality.

[ManevilleF]

I ran into the same issue with my learning project as well, I suggest using components for delayed elements instead of events.