Unity ECS - CodeMonkey 01

LevelComponent.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Unity.Entities;

public struct LevelComponent : IComponentData
{
    public float level;
}

LevelUpSystem

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Unity.Entities;
public class LevelUpSystem : ComponentSystem
{
    protected override void OnUpdate()
    {
        Entities.ForEach((ref LevelComponent levelComponent) => {
            levelComponent.level += 1f * Time.DeltaTime;
            Debug.Log(levelComponent.level);
        });
    }
}

testing.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Unity.Entities;
using Unity.Transforms;
using Unity.Collections;
using Unity.Rendering;

public class Testing : MonoBehaviour
{
    [SerializeField] private Mesh mesh;
    [SerializeField] private Material material;
    private void Start()
    {
        EntityManager entityManager = World.DefaultGameObjectInjectionWorld.EntityManager;
        EntityArchetype entityArchetype = entityManager.CreateArchetype(
            typeof(LevelComponent),
            typeof(Translation),
            typeof(RenderMesh)
            );

        NativeArray<Entity> entityArray = new NativeArray<Entity>(1, Allocator.Temp);
        entityManager.CreateEntity(entityArchetype, entityArray);

        for (int i = 0; i < entityArray.Length; i++)
        {
            Entity entity = entityArray[i];
            entityManager.SetComponentData(entity, new LevelComponent { level = 10 });

            entityManager.SetSharedComponentData(entity, new RenderMesh
            {
                mesh = this.mesh,
                material = this.material
            });

        }
        entityArray.Dispose();
    }

}