Question Add system to PlayerLoop

How to add system to specific place in player loop. I know how to do it using custom bootstrap, but when using it i need to create world from scratch or full copypaste defaultworldinitialization. It there any simple way to add system to player loop in existed default world?

 

Code (CSharp):

1. var simultaionGroup = World.GetOrCreateSystem<SimulationSystemGroup>(); //Can be any other top level group - Initialization or Presentation
2. var mySystem = World.CreateSystem<MySystem>();
3. simultaionGroup.AddSystemToUpdateList(mySystem);
4. simultaionGroup.SortSystems(); //Mark dirty if !EnableSystemSorting or sorts systems in group depends on their attributes etc.
5.  
6. //Or when you want to add your group with your system, just do the same
7.  
8. var simultaionGroup = World.GetOrCreateSystem<SimulationSystemGroup>(); //Can be any other top level group - Initialization or Presentation
9.  
10. var myGroup = World.CreateSystem<MyGroup>();
11. var mySystem = World.CreateSystem<MySystem>();
12. myGroup.AddSystemToUpdateList(mySystem);
13. myGroup.SortSystems(); //Mark dirty if !EnableSystemSorting or sorts systems in group depends on their attributes etc.
14.  
15. simultaionGroup.AddSystemToUpdateList(myGroup);
16. simultaionGroup.SortSystems(); //Mark dirty if !EnableSystemSorting or sorts systems in group depends on their attributes etc.

 

Thank you for answer, but looks like i have not explained clearly enough. I want to add system at some place not in standard initialize, simulation or presentation system groups. I want to add system at place where default Application.onBeforeRender occurs. And I want to do it not with manual system.Update() invoke, but using same methods as for standard initialize, simulation or presentation system groups does.

 

With World - you can't. When the world is registered in the player loop it registers only these 3 top-level groups inside related player loop places. As a result, an update will be triggered only for these 3 root groups (and their inner systems hierarchy as

AppendSystemToPlayerLoopListImpl

is called recursively from the top of the player loop)



What you can do is not related to World at all, but to the Unity player loop itself. You just register your "system" (which can be just a class) and put this in the player loop (in the sample below it's just at the end of the player loop root, but you can order that whatever you want, get

subSystemList

find required

PlayerLoopSystem

and put your system inside).


As result, your

updateDelegate

will be called every frame in a specific player loop place.

 

https://m.youtube.com/watch?v=gcj3kdFa16I
And free code on patreon

 

Ok, thanks. So there is no native easy way, so i need to code it myself.