# How to divide a circle into a square grid?

How can I divide a circle into a square grid? Think of the subdivision of a plane, but with a circular border. It should look something like this, just imagine that the circle select cursor is the border:

I searched everywhere for an answer, but I could not find any. Any help will be appreciated!

• – user1853
Commented Jan 23, 2017 at 15:01
• @cegaton they are not related as I want a perfect square grid, not a deformed square grid like in those questions. Commented Jan 23, 2017 at 19:19
• May I ask why you need such a grid without caring about proper topology? Commented Jan 23, 2017 at 22:33

This is how I do it:

1. Create a circle and put it a little over the grid plane;
2. In Object mode select the circle first, then add the plane to the selection, by pressing ⇧ Shift RMB (the order is important);
3. Go to top view (Numpad 7) in Orthographic View (toggle with Numpad 5);
4. Go in Edit mode with ↹ Tab;
5. Be sure to have all the meshes selected (hit A);
6. In the T panel (or just by searching with Space) find Knife project and click it.
7. Invert the selection with Ctrl+I
8. Delete the selected mesh parts with X.

Like LukeD said in another answer, this causes your mesh to have a mix of ngons, quads and tris, but that's what you asked for in your question. :-)

• This looks like the answer I'm looking for. I'll try it. Commented Jan 23, 2017 at 19:16
• Also I don't care about the ngons and tris in the edges because I'm not going to modify them. I'm only going to modify the quads. Commented Jan 23, 2017 at 19:17

You can do with the F2 Addon Select 2 vertex and press f to make a edge Then Press F to make vertical edges same with the horizontal edges

• Why did you double my answer? Commented Jan 23, 2017 at 12:39
• actually i answered and did not refresh somebody answered it after refresh my answer was below yours sorry
– atek
Commented Jan 23, 2017 at 12:44
• The results don't look at all the same. Commented Jan 23, 2017 at 13:00
• Despite the final result looks like a grid, the horizontal and vertical edges built with this approach are disjoined: you are building two overlapping sets of faces. Perhaps it would be better to finish with Vertex Connect Path tool or something in order to truly subdivide the edges. Commented Jan 23, 2017 at 18:04
• I did that with the knife but soon realised that it is not a perfect square grid. Commented Jan 23, 2017 at 19:16