Is there a way to create a polar grid / polar chart in Blender 2.93.1? I know I can create a circle and do several insets then draw the lines. I was wondering if there was a better way that can make it adjustable, maybe with geometry nodes.
I've had to come up with a solution for that some time ago and it turns out the algorithm is not that trivial. I based it on the Ruby implementation from the excellent Mazes For Programmers book by Jamis Buck.
I'm sure there are simpler ways to do this but I understand add-ons suggestions are allowed here. Full disclaimer, I wrote that add-on. (It's free to download, use and modify).
Download the Maze Generator add-on from https://github.com/Gorgious56/MazeGenerator/releases/tag/0.4.0
Install it like any other add-on. Tested on version 2.93.1. Open the "N" panel with N and look for a panel named "MG".
In the panel Parameters, set the cell type to "Polar". A polar maze should be generated.
We don't want the walls so you can go ahead and hide them. Click on the eye icon in the walls sub-panel and go into wireframe mode to see your polar grid.
Add a Weld modifier and a Wireframe modifier with "Replace Original" unchecked and "Material Offset" to 1 to get this :
You'll have to set the display type to "Uniform" and the color to pure white to get this effect.
You can then control the "Branching" amount
You can also extend the grid size :