PlayerLoopSystem

Description

The representation of a single system that updates as part of the Player loop in Unity.

A Player loop system represents an engine component or subsystem that updates on each iteration of the Player loop. PlayerLoopSystem has a nested structure where each system contains a subSystemList, which is an array of other systems that update as part of the parent system.

The default loop consists of Unity's built-in native systems such as Input and Audio, but you can add new custom systems to the Player loop by using PlayerLoop.SetPlayerLoop in your C# code. Native systems can only be retrieved by calling PlayerLoop.GetDefaultPlayerLoop, and their parameters must not be modified.

Additional resources: PlayerLoop.

using System.Text;
using UnityEngine.LowLevel;
using UnityEngine;

public static class PrintDefaultPlayerLoop
{
    //Retrieve the default Player loop system and iterate over its subsystems to print them.

    //Run this method on runtime initialization
    [RuntimeInitializeOnLoadMethod]
    private static void AppStart()
    {
        StringBuilder sb = new();
        // Pass the default Player loop to the recursive print function
        RecursivePlayerLoopPrint(PlayerLoop.GetDefaultPlayerLoop(), sb, 0);
        Debug.Log(sb.ToString());
    }
    // Loop through the Player loop tree structure and add the names of the systems to the StringBuilder
    private static void RecursivePlayerLoopPrint(PlayerLoopSystem playerLoopSystem, StringBuilder sb, int depth)
    {
        if (depth == 0)
        {
            sb.AppendLine("ROOT NODE");
        }
        else if (playerLoopSystem.type != null)
        {
            for (int i = 0; i < depth; i++)
            {
                sb.Append("\t");
            }
            sb.AppendLine(playerLoopSystem.type.Name);
        }
        if (playerLoopSystem.subSystemList != null)
        {
            depth++;
            foreach (var s in playerLoopSystem.subSystemList)
            {
                RecursivePlayerLoopPrint(s, sb, depth);
            }
            depth--;
        }
    }
}

Properties