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【Unity3D】ECS入门学习（五）共享组件 ISharedComponentData

article 2025/1/5 7:20:30

using Unity.Entities;
using System;

//[GenerateAuthoringComponent] 无法生效 必须手动添加
public struct MyShareComponentData : ISharedComponentData, IEquatable<MyShareComponentData>
{

    public int data;

    public bool Equals(MyShareComponentData other)
    {
        return data == other.data;
    }
    public override int GetHashCode()
    {
        int tempHash = 0;
        return tempHash ^= data.GetHashCode();
    }
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Unity.Entities;
public class ShareConvert : MonoBehaviour, IConvertGameObjectToEntity
{
    public void Convert(Entity entity, EntityManager dstManager, GameObjectConversionSystem conversionSystem)
    {
        dstManager.AddSharedComponentData<MyShareComponentData>(entity, new MyShareComponentData() { data = 1 });
    }
}

一个继承于Monobehaviour脚本 Start方法执行如下代码：

    //查询共享组件 缓存到数组
        EntityManager entityManager = World.DefaultGameObjectInjectionWorld.EntityManager;
        EntityQuery query = entityManager.CreateEntityQuery(typeof(MyShareComponentData));
        NativeArray<Entity> array = query.ToEntityArray(Allocator.TempJob);

        //获取并修改 (默认是1)  实际上它会创建一个新的共享组件，并不会影响array[1]实体的组件，它还是保持1
        //MyShareComponentData shareCom = entityManager.GetSharedComponentData<MyShareComponentData>(array[0]);
        //shareCom.data = 5;
        //entityManager.SetSharedComponentData(array[0], shareCom);

        //与上方同理
        entityManager.SetSharedComponentData(array[0], new MyShareComponentData() { data = 5 });

        //移除
        //entityManager.RemoveComponent<MyShareComponentData>(array[0]);        

        MyShareComponentData share1 = entityManager.GetSharedComponentData<MyShareComponentData>(array[0]);
        MyShareComponentData share2 = entityManager.GetSharedComponentData<MyShareComponentData>(array[1]);
        Debug.Log(share1.Equals(share2));
        query.Dispose();
        array.Dispose();

场景上创建2个空物体挂载如下脚本：