Union Jack type mesh

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1

Hi everyone!
I have a question about how to generate a Union Jack type mesh in the domain [0, 1] ^ 2.

Thank you in advance!
Shasha

2

Hi Shasha,

you can use the spline goemetry class, see here, by defining the appropriate points and connect them.

The CSG2D class can also be used, see here, by adding/subtracting the rectangles.

Attached there is a small example with the CSG2D class which you can use as starting point.

Best
Michael

https://ngsolve.org/media/kunena/attachments/889/union_jack.py

Attachment: union_jack.py