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Unity中的多线程介绍及使用

文章来自https://blog.csdn.net/zxy13826134783/article/details/79716155 2019-03-15 258浏览

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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。