entitas学习笔记二

创建脚本：Assets/Sources/1.HelloWorld/Systems/LogSystem.cs

using Entitas;
using System.Collections.Generic;
using UnityEngine;

namespace HelloWorldTest
{
    /// <summary>
    /// UseEntitasEntity：是通过 Generate 生成的
    /// </summary>
    public class LogSystem : ReactiveSystem<UseEntitasEntity>
    {
        public LogSystem(Contexts context) : base(context.useEntitas)
        {
        }

        /// <summary>
        /// 所以entitas的逻辑代码都在这里实现
        /// </summary>
        /// <param name="entities"></param>
        protected override void Execute(List<UseEntitasEntity> entities)
        {
            foreach (var entity in entities)
            {
                Debug.Log(entity.helloWorldTestLog.log_info);
            }
        }

        protected override bool Filter(UseEntitasEntity entity)
        {
            return entity.hasHelloWorldTestLog; //只有完成这个条件才能执行 Execute方法
        }

        protected override ICollector<UseEntitasEntity> GetTrigger(IContext<UseEntitasEntity> context)
        {
            return context.CreateCollector(UseEntitasMatcher.HelloWorldTestLog);
        }
    }
}

创建脚本：Assets/Sources/1.HelloWorld/Feature/UseEntitasFeature.cs

namespace HelloWorldTest
{
    public class UseEntitasFeature : Feature
    {
        public UseEntitasFeature(Contexts contexts) : base ("UseEntitasFeature")
        {
            Add(new LogSystem(contexts));
        }
    }
}

创建脚本：Assets/Sources/1.HelloWorld/Controller/GameController.cs

using Entitas;
using UnityEngine;

namespace HelloWorldTest
{
    public class GameController : MonoBehaviour
    {
        // Start is called before the first frame update
        private Systems systems;
        void Start()
        {
            systems = CreateSystem(Contexts.sharedInstance);
            systems.Initialize();
        }

        // Update is called once per frame
        void Update()
        {
            systems.Execute();
            systems.Cleanup();
        }

        private Systems CreateSystem(Contexts contexts)
        {
            return new Feature("UseEntitasFeaturexxxx")
                .Add(new UseEntitasFeature(contexts));
        }
    }
}

把GameController脚本挂在到场景的一个空物体中

创建脚本：Assets/Scripts/MouseInput.cs

using UnityEngine;

public class MouseInput : MonoBehaviour
{
    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetMouseButtonDown(0))
        {
            Contexts.sharedInstance.useEntitas.CreateEntity().AddHelloWorldTestLog("HelloWorld");
        }
    }
}

也把 MouseInput脚本挂在场景中，运行游戏，鼠标点击。