1
$\begingroup$

I just can't figure it out why it does not delete half of a mesh. Trying to do so in geometry nodes.

I want to delete the bottom half of it along the Z-axis but I can't, it acts like it has only 6 faces, these subdivided faces aren't helping at all.

Normals of new faces do not seem correct, I don't know why. It's like there is only 3 states for faces: -1, 1, nearly 0.

The figure, does not work

If I do it with UV sphere it works

Sphere, works

Improve this question
$\endgroup$
2
  • $\begingroup$ Why Normal? Why not Position? $\endgroup$
    – Robin Betts
    Jun 28 at 16:42
  • $\begingroup$ I didn't actually know what are the normals, but now I understand $\endgroup$
    – Eneary
    Jun 28 at 17:12

1 Answer 1

Reset to default
2
$\begingroup$

If you want to remove the lower half of the geometry, I would use the input node Position instead of the input node Normal:

enter image description here

The normals of the faces are definitely not the right way here, because they always point away from a face with a unit vector, and thus do not provide useful values for a position comparison on the Z-axis.

Improve this answer
$\endgroup$
1
  • 2
    $\begingroup$ Thank you a lot, it helped $\endgroup$
    – Eneary
    Jun 28 at 16:46

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.