# How can I just get the corner points in the 3D model?(PDE Toolbox)

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haoran liu am 12 Feb. 2020
Kommentiert: haoran liu am 13 Feb. 2020
Hi everyone!
when I use the syntax "findNodes(mesh,'region','face',18)", I get the corner points and the middle points. So How can I just get the corner points?
Any help would be appreciated.
Thanks
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### Akzeptierte Antwort

Ravi Kumar am 12 Feb. 2020
Hi Haoran,
It looks like you are interested in nodes that form the triangle element corners and not the midside nodes. Two options:
1. You can generate a linear mesh, if you don't need quadratic accuracy.
2. You can pick the first three of the six rows in the output.
Regards,
Ravi
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Ravi Kumar am 13 Feb. 2020
OK, I am unlcear about your approach. I assumed you are workting with 2-D model. You are right, its the first four in 3-D.
haoran liu am 13 Feb. 2020
Thank you for answer my question!

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