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我正在关注此演讲https://www.youtube.com/watch?v=BNMrevfB6Q0并尝试了解如何在单击鼠标时生成单位（用于测试目的）。

一般来说，我创建了一个 UnitBase 等，它实现了 IConvertGameObjectToEntity::Convert 以确保所有单位都可以转换为实体对象，如下所示：

namespace Units
{
    public abstract class UnitBase : MonoBehaviour, IConvertGameObjectToEntity
    {
        public float health;

        public bool selected;

        public void Convert(Entity entity, EntityManager dstManager, GameObjectConversionSystem conversionSystem)
        {
            dstManager.AddComponentData(entity, new Translation {Value = transform.position});
            dstManager.AddComponentData(entity, new Rotation {Value = transform.rotation});
            dstManager.AddComponentData(entity, new Selected {Value = selected});
            dstManager.AddComponentData(entity, new Health {Value = health});
        }
    }

    public abstract class MobileUnitBase : UnitBase
    {
        public float speed;

        public new void Convert(Entity entity, EntityManager dstManager, GameObjectConversionSystem conversionSystem)
        {
            base.Convert(entity, dstManager, conversionSystem);
            dstManager.AddComponentData(entity, new Speed {Value = speed});
        }
    }
}

这些是主要组件：

namespace ECS.Components
{
    public class Health : IComponentData
    {
        public float Value;
    }

    public class Speed : IComponentData
    {
        public float Value;
    }

    public class Selected : IComponentData
    {
        public bool Value;
    }
}

现在，在我的测试脚本中，我有这个：

public class Test : MonoBehaviour
{
    public GameObject unitPrefab;

    private EntityManager _entityManager;
    private Entity _unitEntityPrefab;

    // Start is called before the first frame update
    void Start()
    {
        _entityManager = World.DefaultGameObjectInjectionWorld.EntityManager;
        _unitEntityPrefab  = GameObjectConversionUtility.ConvertGameObjectHierarchy(unitPrefab, World.Active);
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            SpawnUnit(15, 15);
        }
    }

    private void SpawnUnit(float x, float z)
    {
        Debug.Log($"Spawning unit at  x:{x} y:{z}");
        var unitEntity = this._entityManager.Instantiate(this._unitEntityPrefab);
        _entityManager.SetComponentData(unitEntity, new Translation {Value = new Vector3(x, 1, z)});
        _entityManager.SetComponentData(unitEntity, new Rotation {Value = Quaternion.Euler(0, 0, 0)});
        _entityManager.SetComponentData(unitEntity, new Health {Value = 100f});
        _entityManager.SetComponentData(unitEntity, new Selected {Value = false});
    }
}

其中 unitPrefab 只是一个简单的 GameObject，上面有一个 Capsule 和一个基本上是空的脚本，现在是空的：

public class UnitScript : UnitBase
{
    // Start is called before the first frame update
    void Start()
    {

    }

    // Update is called once per frame
    void Update()
    {

    }
}

问题是，当我单击时，实体被创建但单元没有被渲染。

显然我错过了一些东西，但我不明白它是什么。

任何帮助将非常感激！

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