如何在不减慢到 0.3 FPS 的情况下移动 500 个刚体立方体？

Question

过去几周我一直在尝试使用 Unity；我还是新人。我稍微涉足了 ECS、计算着色器等，但如果由于复杂性而没有必要，我真的不想实施这些解决方案。

默认的 Unity 物理引擎真的不能一次处理移动 500 个带有 RigidBodies 的立方体实例吗？还是我做事的方式对性能特别不利？

这是我正在使用的代码；它只是空游戏对象上的一个脚本。它在实例化 500 个立方体时减慢到 16FPS，然后在通过 Rigidbody MoveTowards 一次移动它们时减慢到 0.3 FPS。

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class SpawnAndMove : MonoBehaviour
{
    public TargetCube TargetCube;
    public GameObject CubePrefab;
    public Vector3 brickPosition = new Vector3(10, 0, 0);
    GameObject[] objects;
    int moveCubeInstances;

    // Start is called before the first frame update
    void Start()
    {
        StartCoroutine(Countdown());
    }

    IEnumerator Countdown()
    {
        yield return new WaitForSeconds(3f);
        for (int i = 0; i < 500; i++)
        {
            var cubeClone = Instantiate(CubePrefab, transform.position + brickPosition, transform.rotation);
            cubeClone.tag = "CubeInstance";
        }

        objects = GameObject.FindGameObjectsWithTag("CubeInstance");

        yield return new WaitForSeconds(3f);
        moveCubeInstances = 1;

        while (moveCubeInstances == 1)
        {
            for (int i = 0; i < 500; i++)
            {
                objects[i].GetComponent<Rigidbody>().transform.position =
                            Vector3.MoveTowards(objects[i].GetComponent<Rigidbody>().transform.position, TargetCube.transform.position, 12f);
            }
            yield return new WaitForFixedUpdate();
        }

        print("exited while loop");
    }
}

在此感谢您的帮助。

Answer 1

您对 FindGameObjectsWithTag 的调用会进行额外的搜索，不仅针对新的 500 个对象，而且针对此场景中的所有其他对象
transform 已经是缓存字段，调用它不需要 GetComponent<>

Instantiate是一个非常难的操作，最好提前做好，甚至可以分解成每帧调用几次，比如每次调用50次，但绝对一帧不是 500，而是使用 Pooling (https://docs.unity3d.com/Manual/MobileOptimizationPracticalScriptingOptimizations.html)

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class SpawnAndMove : MonoBehaviour
{
    public TargetCube TargetCube;
    public Rigidbody CubePrefab;
    public Vector3 brickPosition = new Vector3(10, 0, 0);
    Rigidbody[] objects;
    int moveCubeInstances;

    void Start()
    {
        StartCoroutine(Countdown());
    }

    IEnumerator Countdown()
    {
        yield return new WaitForSeconds(3f);
        objects = new Rigidbody[500];
        for (int i = 0 ; i < 500 ; i++)
        {
            Rigidbody cubeClone = Instantiate(CubePrefab, transform.position + brickPosition, transform.rotation);
            cubeClone.tag = "CubeInstance";
            objects[i] = cubeClone;
            if (i % 50 == 0)
            {
                yield return new WaitForFixedUpdate();
            }
        }

        yield return new WaitForSeconds(3f);
        moveCubeInstances = 1;

        while (moveCubeInstances == 1)
        {
            for (int i = 0 ; i < 500 ; i++)
            {
                objects[i].transform.position =
                        Vector3.MoveTowards(objects[i].transform.position, TargetCube.transform.position, 12f);
            }
            yield return new WaitForFixedUpdate();
        }

        print("exited while loop");
    }
}

如何在不减慢到 0.3 FPS 的情况下移动 500 个刚体立方体？

How do you move 500 Rigidbody cubes without slowing to 0.3 FPS?

c#

performance

frame-rate

instance

unity3d