Trigger is performed sometimes and sometimes not

Unity Engine
1

I’m writing a game about a cat attacking a rat.The cat has a collider and trigger, which is turned off, and is turned on only one frame when the cat starts attacking.The rat also has a collider.Both have scripts and rigidbody.OnTriggerEnter (dealing damage, collision detection) does not always work.The attack animation is done but the method does not detect any collisions.Sometimes it works sometimes not.Unity version:2018.4.2f1
Script cat:

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

public class KittyScript : MonoBehaviour
{
    public BoxCollider trigger;

    private float moveVertical;
    private float moveHorizontal;
    private Animator anim;
    public float attackwait=0;
    private bool attack=false;

    // Start is called before the first frame update
    void Start()
    {
        anim = GetComponent<Animator>();
    }

    // Update is called once per frame
    void Update()
    {
        attack = false;
        transform.eulerAngles = new Vector3(0, transform.eulerAngles.y, 0);
        moveVertical = Input.GetAxis("Vertical");
        moveHorizontal = Input.GetAxis("Horizontal");
        anim.SetFloat("MoveVertical", moveVertical);
        anim.SetFloat("MoveHorizontal", moveHorizontal);
        trigger.enabled = false;
        if (moveVertical > 0 && Input.GetKey(KeyCode.LeftShift)) //run
        {
            anim.SetBool("Run", true);
            transform.Translate(new Vector3(0, 0, 3) * Time.deltaTime);
            if (Input.GetKeyDown(KeyCode.Space)) //jump
            {
                anim.SetTrigger("Jump");
            }
        }
        else if(moveVertical>0) //walk
        {
            transform.Translate(new Vector3(0, 0, 1) * Time.deltaTime);
            anim.SetBool("Run", false);
        }
        else if(moveVertical<0) //walk back
        {
            transform.Translate(new Vector3(0, 0, -1) * Time.deltaTime);
            anim.SetBool("Run", false);
        }
        else
        {
            anim.SetBool("Run", false);
        }
        if (moveHorizontal>0) //turn right
        {
            transform.Rotate(new Vector3(0, 70, 0) * Time.deltaTime);
        }
        else if(moveHorizontal<0)//turn left
        {
            transform.Rotate(new Vector3(0, -70, 0) * Time.deltaTime);
        }
        if (attackwait <= 0) //wait for attack
        {
            if(attackwait<0)
            {
                attackwait = 0;
            }

            if (Input.GetMouseButtonDown(0))
            {
                anim.SetTrigger("Attack");
                trigger.enabled = true;
                attack = true;
                attackwait = 1; //wait 1 sec after attack
              
            }
          
        }
        else
        {
            attackwait = attackwait - (1 * Time.deltaTime);
        }
      
      
    }

    private void OnTriggerEnter(Collider other)
    {
        Debug.Log("Trigger");
        if (other.CompareTag("Rat") && attack == true)
        {
            other.gameObject.GetComponent<Health>().health = other.gameObject.GetComponent<Health>().health - 5;
            Debug.Log("I did damage");
        }
      
    }

}
2

That won’t work. The physics system is not updated as often as Update, so you might get Update two times in a row without a physics update between them. This will cause you to enable and disable the collider without anything happening.

I’d not use a collider, and instead do a Physics.OverlapBox to check what you’re hitting. That’s ideal for single-frame checks for hits, like what you’re doing.

3

Thank you very much!