Multi threaded game - updating, rendering, and how to split them

Question

So, I\'m working on a game engine, and I\'ve made pretty good progress. However, my engine is single-threaded, and the advantages of splitting updating and rendering into separa

Answer 1

I would say add a field that specifies the thread needed to run and render, and number the threads, if the thread number == the thread required, then it is allowed to run and render, and increment the required thread field, until it hits max, then loop back to 0. Alternatively, you could, use one thread for tick and another for render, this might be easier. Here is an example code:

public Game() {
    this.tickThread=new Thread(this::tickLoop());
    this.renderThread=new Thread(this::renderLoop());
}
public void tickLoop() {
    //code for timing...
    while(running) {
        //more code for timing...
        tick();
    }
}
public void renderLoop() {
    //code for timing or syncing frames...
    while(running) {
        //more code for timing...
        render();
    }
}

Alternatively, you could say:

---

|MyRunnable.java|

public interface MyRunnable
{
    public abstract void run(boolean toRender);
}

---

|MyThread.java|

public class MyThread extends Thread
{
    private boolean isRender;
    private MyRunnable runnable
    public MyThread(boolean isRender,MyRunnable runnable)
    {
        this.isRender=isRender;
        this.runnable=runnable;
    }
    public void run()
    {
        this.runnable.run(this.isRender);
    }
}

---

|Game.java|

public class Game extends /*JPanel/Canvas/JFrame/Some other component*/
{
    private MyThread tickThread;
    private MyThread renderThread;
    private boolean running;
    public Game()
    {
        super();
        tickThread=new MyThread(this::run);
        renderThread=new MyThread(this::run);
        //other constructor code
    }
    public void tick()
    {
        //tick code here
    }
    public void render()
    {
        //render code here
    }
    public void run(boolean isRender)
    {
        //timing variables
        while(running)
        {
            //timing code
            if(isRender)
            {
                this.render();
            }
            else
            {
                this.tick();
            }
        }
    }
}