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Bug SystemAPI.Query with Managed components in foreach doesn't work.

Discussion in 'Entity Component System' started by itsDmajster, Dec 14, 2022.

  1. itsDmajster

    itsDmajster

    Joined:
    Oct 27, 2014
    Posts:
    45
    I tried moving my camera around in the game with ECS but found out that there is no runtime representation for it, so I tried just handling the managed component, but no matter what I tried the foreach never ran. Upon trying to figure out what the cause was I found out that also the example with the Transform doesn't work. I tried placing the entity with the camera both in the subscene and the scene in neither case did I get any debug logs that anything ran.

    Unity version 2022.2.0f1, Entities 1.0.0-pre.15

    Code (CSharp):
    1. using Unity.Entities;
    2. using UnityEngine;
    3.  
    4. public partial class PlayerCameraSystem : SystemBase
    5. {
    6.     protected override void OnUpdate()
    7.     {
    8.         foreach (var transformRef in SystemAPI.Query<SystemAPI.ManagedAPI.UnityEngineComponent<UnityEngine.Transform>>())
    9.         {
    10.             Debug.Log("test");
    11.             transformRef.Value.Translate(0, 1, 0);
    12.         }
    13.     }
    14. }
    15.  
     
    itsDmajster, Dec 14, 2022
    #1

  2. DaxodeUnity

    DaxodeUnity

    Unity Technologies

    Joined:
    Aug 5, 2021
    Posts:
    27
    Hi :)

    How did you set up the Entity? Your example should query all entities with the managed component 'Transform'.

    As an example. Say i had a System:
    Code (CSharp):
    1. partial struct MySystem : ISystem {
    2.     public void OnCreate(ref SystemState state){
    3.         var entity = state.EntityManager.CreateEntity();
    4.         state.EntityManager.SetName(entity, "MyEntity"); // note this is just a debug name, and not actually useful in your built games.
    5.         var myTestObject = new GameObject("MyCodeMadeGO"); //statics and other ways to find an actual GO works too
    6.         state.EntityManager.AddComponentObject(entity, myTestObject.transform);
    7.     }
    8.     public void OnUpdate(...){}
    9.     public void OnDestroy(...){}
    10. }
    Now the query you made would find the transform of "MyCodeMade GO ..." as an entity exists with that transform. Note I used ISystem as an example but SystemBase works just as well in your case :)
     
    DaxodeUnity, Feb 7, 2023
    #2