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Can someone please tell me how to select the inner quads and delete them, basically I'm learning to implement A* and want to create a navmesh that will later be used in unity.

Here's the image. What I have done

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2 Answers 2

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It could depend also on the resulting mesh you wish to obtain, eg:

  • a big plane with only 4 vertices?

  • a big empty plane with only 4 vertices?

  • the plane as it is but without inner quads?

see a couple of example below, using dissolve commands

with dissolve vertices, but you get a plane of more than 4 verts

enter image description here

enter image description here

or with dissolve edges

enter image description here

enter image description here

...you get the idea...

[edit] in the tutoarial you are following inthe link above, it says

"Create a plane, subdivide it two times and then remove the inner four quads."

well,

  • first, it is wrong: to get the subdivided plane I see in that image, which has a total of 16 face after subdivision, you have to subdivide the plane 3 times, not 2.

then it seems to convert those inner 4 faces into a a big square.

so you can switch to select faces mode, selet the inner 4 faces, and simply "dissolve faces"... like this

enter image description here

enter image description here

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  • $\begingroup$ How do I select specific quads? $\endgroup$ Nov 20, 2015 at 9:28
  • $\begingroup$ As shown above, select vertices or edges. But you can also do this: select all quads, switch to select edges and press CTRL-X $\endgroup$
    – m.ardito
    Nov 20, 2015 at 9:41
  • $\begingroup$ Nope, I don't think i'll be able to do it $\endgroup$ Nov 20, 2015 at 10:01
  • $\begingroup$ It says, subdivide the plane two times and then remove inner four quads. And I don't even know how to select and remove! $\endgroup$ Nov 20, 2015 at 10:01
  • $\begingroup$ "it says"... Are you meaning in the the link you put in the post? I'll check it out. If you try on a simple quad subdivided, my method works, but in that tutorial, something could be different, let me check it. OK. I'll edit my answer. $\endgroup$
    – m.ardito
    Nov 20, 2015 at 10:04
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Making the shape pictured below (a plane with a hole in it) is very easy.
resulting mesh

All you have to do is select the center vertex and delete it, with Delete > Vertices (or X > Vertices ).

animated gif - deleting a vertex

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