Why aren't the positions rendered correctly with this code?

Code (CSharp):

1.         query = GetEntityQuery(typeof(Translation));
2.        
3.         var nat = query.ToComponentDataArray<Translation>(Allocator.TempJob);
4.         for (int i = 0; i < nat.Length; i++)
5.         {
6.             var trans = nat[i];
7.             trans.Value.x = Random.Range(0, 5);
8.             nat[i] = trans;
9.         }
10.         query.CopyFromComponentDataArray(nat);

I can see the translation.x values changing in the entity debugger (but only if i refresh the debugger, which is also weird) but the rendered positions does not change.
If I set the translation values of the nativearray through a foreach instead it renders correctly and the entity debugger correctly updates the values in realtime.

 

I think

trans.Value.x

is setting a copy because it's a struct.

You probably want something like this:

nat[I] = new Translation {Value = new float3 (Random.Range(0, 5), y, z)};

 

Unfortunately not.
For example,
If I just change:

Code (CSharp):

1. query.CopyFromComponentDataArray(nat);

Into

Code (CSharp):

1.         Entities.ForEach((int entityInQueryIndex, ref Translation translation) =>
2.             {
3.                 translation.Value = nat[entityInQueryIndex].Value;
4.             }).ScheduleParallel(Dependency).Complete();

Then the new positions render correctly, which proves that the values are being changed.