Unity游戏优化脚本失效求助：移动时帧率骤降

核心问题分析 #

1. OnTriggerExit2D逻辑错误：当前代码中，所有碰撞体离开触发区时都会执行禁用组件的操作，而非仅针对"PlayerDrawing"触发体。这会导致玩家移动时，物体频繁触发Enter/Exit（哪怕是和其他物体碰撞），反复启用/禁用SpriteRenderer、物理组件等，直接引发帧率暴跌。
2. 触发体范围不合理：如果"PlayerDrawing"触发体尺寸过小，玩家移动时会反复进入/离开物体的触发区，高频触发状态切换操作，加剧性能消耗。
3. 刚体约束判断逻辑错误：rb2D.constraints != RigidbodyConstraints2D.FreezeAll || rb2D.bodyType != RigidbodyType2D.Kinematic 使用||会导致不必要的约束重置操作，进一步增加性能开销。

修复后的代码 #

ObjectManager 脚本 #

using UnityEngine;

[RequireComponent(typeof(ObjectParameters))]
public class ObjectManager : MonoCache
{
    public SpriteRenderer[] spriteRenderers;
    [Space]
    public ObjectParameters objectParameters;
    [Space]
    [SerializeField] bool freezeRotation;
    bool isBuilded;
    [Space]
    public bool usingDragging = true;
    [Space]
    [SerializeField] bool usingRigidBody;
    Rigidbody2D rb2D;
    float gS;
    [Space]
    [SerializeField] bool usingSheetDrop;
    SheetDrop sheetDrop;
    

    void Start()
    {
        rb2D = GetComponent<Rigidbody2D>();
        objectParameters = GetComponent<ObjectParameters>();
        sheetDrop = GetComponent<SheetDrop>();

        if (usingRigidBody)
        {
            rb2D.constraints = RigidbodyConstraints2D.FreezeAll;
            gS = rb2D.gravityScale;
        }

        if (usingSheetDrop)
        {
            sheetDrop.enabled = false;
        }

        objectParameters.enabled = false;

        foreach (var renderer in spriteRenderers)
        {
            renderer.enabled = false;
        }
    }

    private void OnTriggerEnter2D(Collider2D collision)
    {
        if (collision.tag == "PlayerDrawing")
        {
            if (usingRigidBody)
            {
                // 恢复重力与约束
                rb2D.gravityScale = gS;
                rb2D.constraints = freezeRotation ? RigidbodyConstraints2D.FreezeRotation : RigidbodyConstraints2D.None;
            }

            if (usingSheetDrop)
            {
                sheetDrop.enabled = true;
            }

            objectParameters.enabled = true;

            foreach (var renderer in spriteRenderers)
            {
                renderer.enabled = true;
            }
        }
    }

    private void OnTriggerExit2D(Collider2D collision)
    {
        // 仅当离开PlayerDrawing触发体时执行禁用逻辑
        if (collision.tag == "PlayerDrawing")
        {
            if (usingRigidBody)
            {
                // 修正判断逻辑：仅当需要时重置约束
                if (rb2D.constraints != RigidbodyConstraints2D.FreezeAll && rb2D.bodyType != RigidbodyType2D.Kinematic)
                {
                    rb2D.constraints = RigidbodyConstraints2D.FreezeAll;
                }
            }

            if (usingSheetDrop)
            {
                sheetDrop.enabled = false;
            }

            objectParameters.enabled = false;

            foreach (var renderer in spriteRenderers)
            {
                renderer.enabled = false;
            }
        }
    }
}

ObjectParameters 脚本（无需修改，仅优化细节） #

using UnityEngine;

public class ObjectParameters : MonoCache
{
    public Dragging dragging;
    public Rigidbody2D rb;
    public Vector3 position;
    public Quaternion rotation;
    ObjectManager objectManager;
    Transform transform_;

    void Start()
    {
        objectManager = GetComponent<ObjectManager>();
        transform_ = transform;
        rb = GetComponent<Rigidbody2D>();
    }

    public override void OnTick()
    {
        position = transform_.position;
        rotation = transform_.rotation;
    }
}

额外检查建议 #

1. 调整触发体范围：将"PlayerDrawing"的碰撞体尺寸调整为玩家周围合理的范围（比如角色半径的1.5-2倍），避免移动时频繁触发Enter/Exit事件。
2. 添加状态锁：可以在ObjectManager中添加bool isActive变量，避免在同一帧内重复执行启用/禁用操作，进一步优化性能：

   bool isActive;
   
   // 在OnTriggerEnter2D开头添加
   if (isActive) return;
   isActive = true;
   
   // 在OnTriggerExit2D开头添加
   if (!isActive) return;
   isActive = false;
   

内容的提问来源于stack exchange，提问作者unwritten_k