Changing color of only one gameobject

Question

So i have this script the checks if my mouse cursor is over the block and if it is i want the block to change color

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

public class BasicBlockFunction : MonoBehaviour {

public GameObject Block;
public Color StartingColor;
public Color HighlightColor;
Color color;
Ray ray;
RaycastHit hit;



// Use this for initialization
void Start () {

}

// Update is called once per frame
void Update () {
    MouseOver();
}

void MouseOver()
{
    ray = Camera.main.ScreenPointToRay(Input.mousePosition);

    if (Physics.Raycast(ray, out hit))
    {
        print(hit.collider.name);
        Block.GetComponent<Renderer>().material.color = HighlightColor;
    }
    else
    {
        Block.GetComponent<Renderer>().material.color = StartingColor;
    }

 }


}

I want to change the color only for the gameobject i have my mouse on.

Answer 1

If your block objects each have their own colliders, you can do this with a script you attach to each block, leveraging Unity's built-in OnMouseEnter / OnMouseExit events:

[RequireComponent(typeof(Renderer))]
public class HoverHighlight : MonoBehaviour {

    public Material highlightMaterial;

    Renderer _renderer;
    Material _originalMaterial;

    void Start() {
       _renderer = GetComponent<Renderer>();
       _originalMaterial = _renderer.sharedMaterial;
    }

    void OnMouseEnter() {
       _renderer.sharedMaterial = highlightMaterial;
    }

    void OnMouseExit() {
       _renderer.sharedMaterial = _originalMaterial;
    }

}

Answer 2

Instead of changing the material color, you could change the material.

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

public class BasicBlockFunction : MonoBehaviour {

public GameObject Block;
public Material StartingMaterial;
public Material HighlightMaterial;
Color color;
Ray ray;
RaycastHit hit;



// Use this for initialization
void Start () {

}

// Update is called once per frame
void Update () {
    MouseOver();
}

void MouseOver()
{
    ray = Camera.main.ScreenPointToRay(Input.mousePosition);

    if (Physics.Raycast(ray, out hit))
    {
        print(hit.collider.name);
        Block.GetComponent<Renderer>().sharedMaterial = HighlightMaterial;
    }
    else
    {
        Block.GetComponent<Renderer>().sharedMaterial = StartingMaterial;
    }

 }


}

This would give you more control over the highlight material.

Answer 3

You are referring to a Block game object not the object being hit by the array. To change the object the raycast hits use the hit variable. This stores all info about the object including its material and colour.