Unity中的多线程介绍及使用
发表于2019-03-15
有些不涉及U3D API的计算可以放在分线程里,能提高多核CPU的使用率。
总结:
1. 变量(都能指向相同的内存地址)都是共享的
2. 不是UnityEngine的API能在分线程运行
3. UnityEngine定义的基本结构(int,float,Struct定义的数据类型)可以在分线程计算
如 Vector3(Struct)可以 , 但Texture2d(class,根父类为Object)不可以。
UnityEngine定义的基本类型的函数可以在分线程运行,如
int i = 99; print (i.ToString()); Vector3 x = new Vector3(0,0,9); x.Normalize();
类的函数不能在分线程运行
obj.name
实际是get_name函数
分线程报错误:get_name can only be called from the main thread.
Texture2D tt = new Texture2D(10,10);
实际会调用UnityEngine里的Internal_Create
分线程报错误:Internal_Create can only be called from the main thread.
其他transform.position,Texture.Apply()等等都不能在分线程里运行。
结论: 分线程可以做 基本类型的计算, 以及非Unity(包括。Net及SDK)的API
例1:在分线程里print信息
using UnityEngine; using System.Collections; using System; using System.Threading; public class Manager : MonoBehaviour { void Start () { Thread t = new Thread(new ThreadStart(Cal)); t.Start(); } void Cal() { print ("Hello world!"); } }
运行后在控制台里会输出“Hello world!”
例2:基本的计算
using UnityEngine; using System.Collections; using System; using System.Threading; public class Manager : MonoBehaviour { public int index; void Start () { index = 0; Thread t = new Thread(new ThreadStart(Cal)); t.Start(); } void Update () { print("index: "+index); } void Cal() { index = 10; } }
例3:计算Vector3
using UnityEngine; using System.Collections; using System; using System.Threading; public class Manager : MonoBehaviour { public Vector3 vec; void Start () { vec = new Vector3(0,0,0); Thread t = new Thread(new ThreadStart(Cal)); t.Start(); } void Update () { print(vec); } void Cal() { vec = new Vector3(10,20,0); } }
例4:在分线程里创建并计算Vector3
using UnityEngine; using System.Collections; using System; using System.Threading; public class Manager : MonoBehaviour { public Texture2D t2d; void Start () { Thread t = new Thread(new ThreadStart(Cal)); t.Start(); } void Cal() { Vector3 x = new Vector3(0,0,9); print(x); } }
例5:在分线程里创建并调用Vector3的函数
using UnityEngine; using System.Collections; using System; using System.Threading; public class Manager : MonoBehaviour { public Texture2D t2d; void Start () { Thread t = new Thread(new ThreadStart(Cal)); t.Start(); } void Cal() { Vector3 x = new Vector3(0,0,9); x.Normalize(); print(x); } }
输出(0.0, 0.0, 1.0)
多线程还可以用来Socket传输数据。