change material color dynamically

Unity Engine
1

I have script that is adding multiple spheres (prefabs) to the scene. On those prefabs, I have a script to change their materials color. About 1 every 10 prefabs color will actually change to the desired result. If that prefab with the changed color is destroyed, a random prefab will finally show the desired color. Hope that made sense?

Here is what I have on the prefab :

function Update()
{
   gameObject.Find("Sphere").renderer.material.color = Color(1.0, 0.0, 1.0, 1.0);
}

The reason for me using gameObject.Find(“Sphere”) is to grab the child which has the material attached to it. The parent doesn’t have any materials applied to it.

Thank you

2

If all the spheres are named “Sphere”, then you have to add all spheres to a GameObject[ ] and loop through the objects in the array to change the color on all of them.

3

How would that be any different that what I am trying to do though?

4

GameObject.Find() only returns a single object per frame. Hence, one random object. Populate an array using GameObject.FindGameObjectsWithTag().

It’s also not a good idea to use these find utility functions within an Update(). They’re very slow. Cache the values by populating a list as you create/destroy the spheres.

5

Here is what I have :

private var color : String;

function Awake()
{
    color = Random.Range(0, 10) < 5 ? "black" : "white";
    sphere = gameObject.FindGameObjectsWithTag("Bubble")[0];
    sphere.renderer.material.color = color == "black" ? Color.black : Color.white;
}

function Update()
{
    transform.Translate(0, -1 * Time.deltaTime, 0);
}

For some reason, all the bubbles are still white. There will be 1 in every ~30 bubbles that are black, but then that same bubble with switch back to white after 1-2 seconds, then back to black, then back to black… why?

I have this script attached to my Prefab, and there is a child prefab that has a tag name called “Bubble”. I am trying to change the materials color.

Any idea why 95% of my spheres are still white?

6

I don’t quite see where you’re iterating through the array changing all the spheres.

7

because this script is on the parent sphere. I should be able to grab the child prefab with the code, correct?