I saw this 
recently because i stumbled upon this 
and it made me want to implement it in Unity.
So thats what i did and a little extra. Instead of just having 2D i also added a 3D mode that draws circles instead of lines.
Unity Version used: 2020.1.2f1
How to use:
- Need to use URP/HDRP because of Shader Graph
- Create a Material with the shader.
- Create a empty Game object and slap the Script and the Material on it.
