https://forum.unity.com/threads/batch-entitycommandbuffer.593569/
Easily create lots of events extremely efficiently.
Instead of using a EntityCommandBuffer, we get a NativeQueue from CreateEventQueue where T is IComponentData, the event data.
NativeQueue<T> EntityEventSystem.CreateEventQueue<T>(JobComponentSystem componentSystem)It is safe to pass this queue to Jobs, using ToConcurrent() for parallal jobs. Once you have this queue, to create an event simply create, set and add a new type of T to the queue and the EntityEventSystem will handle the rest for you.
The EntityEventSystem will batch create create entities for all these components and then set the component data.
- Events live exactly 1 frame. They will be created in EntityEventSystem and 1 frame later destroyed in EntityEventSystem.
- Use of event will be delayed till the next frame. EntityEventSystem executes just before EndFrameBarrier.
- You can use CreateEventQueue for the same type from different systems or even multiple times from the same system.
- In the case of the same system, it's slightly faster to reuse the same queue if systems have correct dependencies.
- The system calling CreateEventQueue passes a reference to itself to the EntityEventSystem and this is used to ensure dependencies are completed before EntityEventSystem is updated.
void CreateBufferEvent<T, TB>(T component, NativeArray<TB> buffer)Works similar to CreateEventQueue except it will add a component T and BufferArray to the entity.
Note: you do not need to worry about disposing the NativeArray as this will be done for you.
- NativeUnit - Let's you effectively pass a 'reference' of a struct between jobs.
- EntityManager - SetComponentObject(Entity, ComponentType, object)
- World - AddManager for creating your own managers dynamically (dependency injection etc)
- List - AddRange(NativeArray), AddRange(NativeList), AddRange(DynamicBuffer), AddRange(NativeSlice), AddRange(void*, int), Resize(int), EnsureLength(int, T)
- DynamicBuffer - Contains(T), IndexOf(T), Remove(T), Reverse(), ResizeInitialized(int), CopyTo(NativeArray)
- NativeList - Reverse(), Insert(T, int), Remove(T), RemoveAt(int), RemoveRange(int, int)