Creating a circle as range of the turret

Hello.
As the title says, I want to create a circle that would represent range of the turret (radius would be it's colder)

I found one solution how to create a circle, bit I have no idea how that works. Could someone please explain? I have never worked with line renderer so far.

https://forum.unity.com/threads/linerenderer-to-create-an-ellipse.74028/

I just want to understand how that works and then implement it to my game

Thank you!

 

Just attach that script to a GameObject that also has a LineRenderer component. The script uses a bit of trigonometry to calculate the points on the line that approximate a circle.