ECSとJobComponentSystemからMonoBehaviourが持っている配列へデータを書き出す。

ECS_SCRIPT.cs

//Unity2018.2.0b4 [EntityComponentSystem(ECS) ver0.0.12-preview1]
using UnityEngine;
using Unity.Entities;
using Unity.Collections;
using System.Linq;
using System.Collections.Generic;
using Unity.Jobs;
using Unity.Mathematics;

struct DATA1 : IComponentData
{
    public int val;
}


class JOB_SYSTEM1 : JobComponentSystem
{

    [ComputeJobOptimization]
    struct JOB : IJobParallelFor
    {
        public ComponentDataArray<DATA1> _data1;
        public void Execute(int index)
        {
            var P = _data1[index];
            P.val += 10;
            _data1[index] = P;
        }
    }

    protected override JobHandle OnUpdate(JobHandle inputDeps)
    {
        var data1 = this.GetComponentGroup(typeof(DATA1)).GetComponentDataArray<DATA1>();
        var job = new JOB()
        {
            _data1 = data1
        };

        var outputdeps = job.Schedule(data1.Length, 16, inputDeps);
        return outputdeps;
    }
}



//JOBSystem外の配列に書き込む。
class JOB_SYSTEM2 : JobComponentSystem
{
    [ComputeJobOptimization]
    struct JOB : IJobParallelFor
    {
        public NativeArray<float3> _vertex;
        public ComponentDataArray<DATA1> _data1;
        public void Execute(int index)
        {
            _vertex[index] = _data1[index].val;
        }
    }

    protected override JobHandle OnUpdate(JobHandle inputDeps)
    {
        var data1 = this.GetComponentGroup(typeof(DATA1)).GetComponentDataArray<DATA1>();
        var job = new JOB()
        {
            _data1 = data1,
            _vertex = ECS_SCRIPT._vertex
        };

        var outputdeps = job.Schedule(data1.Length, 16, inputDeps);
        return outputdeps;
    }
}






class ECS_SCRIPT : MonoBehaviour
{
    EntityManager EM;
    List<Entity> entityList;

    public static NativeArray<float3> _vertex;

    private void Start()
    {
        EM = World.Active.GetOrCreateManager<EntityManager>();
        var archeType = EM.CreateArchetype(typeof(DATA1));

        var instance = new NativeArray<Entity>(100000, Allocator.Temp);
        EM.CreateEntity(archeType, instance);
        instance.Dispose();

        //バッファを用意
        _vertex = new NativeArray<float3>(100000, Allocator.Persistent);
    }

    private void OnDisable()
    {
        //バッファを破棄
        _vertex.Dispose();
    }

    private void Update()
    {
        //_vertexへの書き込み終了を待つ。
        EM.CompleteAllJobs();

        //取得できたデータにアクセス。
        Debug.Log(_vertex[0].x + ":" + _vertex[0].y + ":" + _vertex[0].z);
    }

}