Unity 2018 Shaders and Effects Cookbook

Moving the circle

This is great, but you'll likely also want to change where the circle is at run-time, which we can do via code. If you want the circle to follow your character, other steps are necessary:

1. Create a new C# script called SetRadiusProperties.
2. Since you may wish to see this change both in the game and outside, we can add a tag to the top of the class saying to execute this code while in the editor, in addition to when the game is being played, by adding the following tag:

[ExecuteInEditMode]public class SetRadiusProperties : MonoBehaviour

3. Add these properties to the script:

public Material radiusMaterial; 
public float radius = 1; 
public Color color = Color.white; 

4. In the Update() method, add these lines of code:

if(radiusMaterial ...