I am having problems with a door collider and a trigger.

Question

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

public class DoorOpen : MonoBehaviour {

 private Animator animator;

 private bool doorOpen;

 void start()
 {
     doorOpen = false;
     animator = GetComponent<Animator>();
 }

 private void OnTriggerEnter(Collider other)
 {
     if (other.gameObject.CompareTag("Key"))
     {
         doorOpen = true;

         Doors ("Open");
     }
     
 }

 private void OnTriggerExit(Collider other)
 {
     if (doorOpen)
     {
         doorOpen = false;

         Doors ("Close");
     }
 }

 void Doors (string direction)
 {
     animator.SetTrigger(direction);
 }

} this is my code and it is saying

NullReferenceException: Object reference not set to an instance of an object DoorOpen.Doors (System.String direction) (at Assets/Animations/DoorOpen.cs:40) DoorOpen.OnTriggerEnter (UnityEngine.Collider other) (at Assets/Animations/DoorOpen.cs:23)

The key has a tag called "Key" and the door has a collider that you need to bring the key to to open the door. Any ideas?

Answer 1

Answer by Sabre-Runner · Nov 04, 2018 at 03:40 AM

It is not clear from your question to which line of code this actually refers too. But if I grok this correctly, it looks like your Animator assignment isn't taking. Either make sure it's grabbing correctly, check it before you use it, or forgo the GetComponent and assign it in the inspector.

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Wolf_King363 · Nov 04, 2018 at 05:05 AM 0

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How would I execute that by checking if it is grabbing it correctly? Or how would I assign the item in the inspector? Do I use a public variable?

Sabre-Runner · Nov 04, 2018 at 07:22 AM 0

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The preferred method is [SerializeField] private This will show them in the inspector but won't make it otherwise accessible.

I am having problems with a door collider and a trigger.

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