Creating an outline on an object when...

Unity Engine
1

How can I create a outline of a cube lets say. I want to use a mouse hover technique. I am using a 2d view on cubes that are 13 by 13 (yea weird but it looks the best). So the link that I linked to just a second ago was to change all of the renderer. What I want to do is just add an outline to the cube. Most likely a clear yellow color (the cubes are a dark texture).

How would I go about doing that? Also I attached the following script to the cube I am using for this project…

function Update () 
{

}

function OnMouseOver () 
{
    renderer.material.color -= Color(0.1, 0, 0) * Time.deltaTime;
}

I tried it and when I press play and hover my mouse over the cube, nothing happens. (Yes it has a collider). For this to work do I need a ray cast thingy? If so I will need some help because I have never successfully used the ray cast function.

SO in the end I’m asking for some coding help on how to do an outline of a 13x13x1 prism (in a 2d view - so you only see the top of it), as well as how I make it actually work when the mouse is over it (ray cast)?

2

If all the objects you are going to outline are just cubes you can instantiate a yellow cube with inverted normals (and slightly larger than the dark cubes) to act as an outline.

3

Do you think you could wrtie an example script to show me how the ray casting works with the instatiateing and what not.