public void Execute(Entity entity, int index, [ReadOnly] ref Translation translation)
{
float3 Cube_Pos = translation.Value;
float3 closestTargetPosition = float3.zero;
Entity Target = Entity.Null;
//Debug.Log("搜尋");
for (int i = 0; i < targetarray.Length; i++)
{
EntityJobArray targetentityJobArray = targetarray[i];
if (Target == Entity.Null)
{
// No target
Target = targetentityJobArray.entity;
closestTargetPosition = targetentityJobArray.position;
}
else
{
if (math.distance(Cube_Pos, targetentityJobArray.position) < math.distance(Cube_Pos, closestTargetPosition))
{
// This target is closer
Target = targetentityJobArray.entity;
closestTargetPosition = targetentityJobArray.position;
}
}
}
//這邊也跟第一種不一樣，將陣列保存目標Entity的數據
TargetEntityArray[index] = Target;
}
public void Execute(Entity entity, int index, [ReadOnly] ref Translation translation)
{
float3 Cube_Pos = translation.Value;
float3 closestTargetPosition = float3.zero;
Entity Target = Entity.Null;
//Debug.Log("搜尋");
for (int i = 0; i < targetarray.Length; i++)
{
EntityJobArray targetentityJobArray = targetarray[i];
if (Target == Entity.Null)
{
Target = targetentityJobArray.entity;
closestTargetPosition = targetentityJobArray.position;
}
else
{
if (math.distance(Cube_Pos, targetentityJobArray.position) < math.distance(Cube_Pos, closestTargetPosition))
{
Target = targetentityJobArray.entity;
closestTargetPosition = targetentityJobArray.position;
}
}
}
//放入敵人數據
if (Target != Entity.Null)
{
//EntityCommandBuffer實體命令緩衝
//使用了這個是無法使用BurstCompile
entityCommandBuffer.AddComponent(index, entity, new Cube_Look_Target {
targetEntity = Target
});
}
}
protected override JobHandle OnUpdate(JobHandle inputDeps)
{
bool JobAdd = GameHander_test.GameHander_test_ins.JobAddComponent;
bool JobEnabled = GameHander_test.GameHander_test_ins.JobBool;
//Debug.Log(JobAdd);
//共通部分，為了拿到目標物的Entity
//因為Job中無法訪問世界所以要先訪問佇列
//這句意思就是找有Ball_Target組件 並有Translation組件
EntityQuery targetQuery = GetEntityQuery(typeof(Ball_Target), ComponentType.ReadOnly <Translation>());
//轉成陣列
NativeArray <Entity> targetEntityArray = targetQuery.ToEntityArray(Allocator.TempJob);
NativeArray <Translation> targetTranslationArray = targetQuery.ToComponentDataArray <Translation>(Allocator.TempJob);
//轉換完，這是目標圓球陣列
NativeArray <EntityJobArray> targetArray = new NativeArray <EntityJobArray>(targetEntityArray.Length, Allocator.TempJob);
//輸入資料
for (int i = 0; i < targetEntityArray.Length; i++)
{
targetArray[i] = new EntityJobArray
{
entity = targetEntityArray[i],
position = targetTranslationArray[i].Value,
};
}
//釋放陣列
targetEntityArray.Dispose();
targetTranslationArray.Dispose();
JobHandle jobHandle;
//共通結束
//是否啟動JobSystem還是ComponentSystem
if (JobEnabled == true)
{
//啟動JobSystem
if (JobAdd == false)
{
//第一種作法
FindTargetJobSystem_No1 findTargetJobSystem_No1 = new FindTargetJobSystem_No1
{
targetarray = targetArray,
entityCommandBuffer = endSimulationEntityCommandBufferSystem.CreateCommandBuffer().ToConcurrent()
};
jobHandle = findTargetJobSystem_No1.Schedule(this, inputDeps);
}
else
{
//第二種作法
//這句意思就是找有Cube_Unit組件 並排除Ball_Target組件
EntityQuery unitQuery = GetEntityQuery(typeof(Cube_Unit), ComponentType.Exclude <Ball_Target>());
NativeArray <Entity> closestTargetEntityArray = new NativeArray <Entity>(unitQuery.CalculateEntityCount(), Allocator.TempJob);
FindTargetJobSystem_No2 findTargetJobSystem_No2 = new FindTargetJobSystem_No2
{
targetarray = targetArray,
TargetEntityArray = closestTargetEntityArray
};
jobHandle = findTargetJobSystem_No2.Schedule(this, inputDeps);
AddComponentJob addComponentJob = new AddComponentJob
{
TargetEntityArray = closestTargetEntityArray,
entityCommandBuffer = endSimulationEntityCommandBufferSystem.CreateCommandBuffer().ToConcurrent(),
};
jobHandle = addComponentJob.Schedule(this, jobHandle);
}
}
else
{
//啟動ComponentSystem但JobSystem不能return空，所以用一空Job賦值
FindTargetJobSystem_Null findTargetJobSystem_Null = new FindTargetJobSystem_Null {
};
jobHandle = findTargetJobSystem_Null.Schedule(this, inputDeps);
}
// 備註
//從作業寫入命令緩衝區時，必須添加
//通過調用此函數將該Job映射到此緩衝區系統的依賴項列表。
//否則，當寫入作業仍在進行時，緩衝區系統可以執行命令緩衝區中當前的命令。
//以上Unity官方
//每當將命令緩衝區傳遞給系統時，您都需要將作業句柄返回到擁有命令緩衝區的系統（您可以簡單地將其返回到系統末尾傳遞最終的作業句柄。）
//這是確保作業的必需條件在屏障系統運行之前，已完成使用命令緩衝區的操作。
//以上Unity論壇
//大致理解，就是為了保護，避免內存出意外，所以擁有EntityCommandBuffer的Job都必須加上這句，放在末尾
endSimulationEntityCommandBufferSystem.AddJobHandleForProducer(jobHandle);
return(jobHandle);
}
