Script to change GameObject materials based on tag?

Question

I'm looking to have a script that changes the material of all the GameObjects in the scene IF it has a tag set to equal "Primary".

My code so far:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class Test : MonoBehaviour {
     
     public GameObject test;
     
     public void changeColor(Material mat)
     {
         if (test.CompareTag("Primary"))
         {
         test.GetComponent<Renderer>().material = mat;
         }
     }
 }

It works with only one GameObject that has to be preset in the Inspector. It does check for the Primary tag however. Is there anyway to skip the Inspector and have a script that changes the materials for all GameObjects assuming it matches the set tag? My goal is to have a script that changes the material of multiple GameObjects that have a set tag after a UI button is pressed.

I have a very limited scope of C#, so any help would be appreciated here. I've been stuck on this for 3 days. Can't find many relevant tutorials on this either.

Answer 1

Answer by tormentoarmagedoom · Jun 07, 2018 at 07:41 AM

Good day.

You only need to look for all gameobjects in the scene with the tag you want. So you need to do a foreach, to make some change in all objects in a array of Objects. This array must be all objects in the scene with the tag. So you want this:

 foreach ( GameObject ObjectFound in GameObject.FindObjectsWithTag("Primary"))
 {
 //Do something to ObjectFound, like this:
 ObjectFound.GetComponent<Renderer>().material = mat;
 }

So while executing, an array with all GameObjects with Tag("Primary") will be created, and will do this action for each object in this array.

Bye!

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panim0_unity · Feb 23, 2019 at 07:56 PM 0

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How to do the same thing for other scenes? I mean for example this will work on a button and once you click on it it will change the material of that objects with same tag in different scenes

Answer 2

Answer by armandonavarro212 · Jun 07, 2018 at 08:09 AM

@tormentoarmagedoom Where do I put your code into the script? Do I add the foreach line under a function or above like a public variable? Popping it into Unity is giving me errors and I'm not sure if I'm adding it into my script correctly.

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Script to change GameObject materials based on tag?

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