Using entities as evens

Wondering if anyone is currently using entities as events. Is this a good idea?

 

Generally not a good idea. Entity add/remove involves structural change.
IBufferElementData can be used as an event container. But no parallel Add/Remove support.
NativeStream is okay as an event container. The only drawback is that It must define write batch count on creation, which means you must know at creation, at least, how many systems are going to write to the stream later.That is sadly not very friendly to an event system.
I have made a NativeParallelBuffer for my event system. It manages an extendable loop buffer for each thread,
so you can write any number of any type of data to the buffer in any thread. And it can be cleared and reused from time to time.

 

This looks very interesting, thank you

 

You could use a NativeQueue.ParallelWriter in the parallel job and then enqueue the events into the DynamicBuffer in a single job

 

Yes, and EntityCommandBuffer.ParallelWriter has AppendToBuffer function.
For a per entity fixed type event system. DynamicBuffer is good enough.