'does anybody know how to make an animation happen once when a player with tag player walks into a trigger

Makes the animation trigger and destroys the trigger after being touched by the player

   using System.Collections;
using System.Collections.Generic;
using UnityEngine;
// You should make the name TheSecretWallScript
// This is the general format for classes in C#
public class Thesecretwallscript : MonoBehaviour
{
    // needed to change this.
    [SerializeField] private Animator anim;
    // Start is called before the first frame update
    private void OnTriggerEnter(Collider other)
    {
        // Disables trigger so it doesn't trigger again
        other.enabled = false;
        // Triggers animation, "AnimTrigger" should refer to the trigger you set
        // in your animators settings
        Animator anim = GetComponent<Animator>();
        anim.SetTrigger("AnimTrigger");
    }
}


Solution 1:[1]

You are destroying the trigger even before the animation trigger happens. Try doing the anim.getcomponent in the start method and animation.settrigger and in the next line other enabled =false.

Something like that

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Joel48