Trying to change the color of a game object.

Questions & Answers
1

I want clicking and/or touching a certain game object on the scene to change the color of another game object. So far I am able to use the mouse and keyboard for this with the script below.

using UnityEngine;
using System.Collections;

public class ColorChanger : MonoBehaviour {

// Use this for initialization
void Start () {

}

// Update is called once per frame
void Update () 
{
	if (Input.GetMouseButton (1)) 
		{
			gameObject.GetComponent<Renderer>().material.color = Color.green;
		}
	if (Input.GetKeyDown (KeyCode.P)) 
		{
			gameObject.GetComponent<Renderer>().material.color = Color.magenta;
		}
}

}

But I want to be able to click on another game object to change this. I have searched the Scripting API but have been unable to find something to do this. Any help would be appreciated!

2

I recommend using raycasting to check if you clicked the object, and when you hitted the requested object change the material.

     public void Update () 
     {
         if(Input.GetMouseButton(0))
         {
             Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
             RaycastHit hit;
             
             if(Physics.Raycast(ray, out hit, 100))
             {
                 //here you can react
                 if(hit.gameObject.tag == "whatever")//if your gameobject with the tag got hit
                 {
                     //change the color
                 }
                 
             }
         }
     }