Mesh

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1

Hi ,everyone ! I want to generate the simlar mesh below at [- 1,1] [-1,1], but the following code is at [0,1] [0,1]. how to modify it? Thank you in advance for your reply！

Yongbin

######################################################
from ngsolve import *
import ngsolve.meshes as ngm

ngsglobals.msg_level = 1

i = 4
mesh = ngm.MakeStructured2DMesh(quads=False, nx = 2i ,ny = 2i)
Draw(mesh)
########################################################

2

Hi Yongbin,

you can use a mapping function to deform the unit-square. The following code gives you the mesh [-1,1]x[-1,1]

[code]from ngsolve import *
import ngsolve.meshes as ngm

ngsglobals.msg_level = 1

i = 4
mapping = lambda x,y : (2x-1,2y-1)
mesh = ngm.MakeStructured2DMesh(quads=False, nx = 2i ,ny = 2i, mapping=mapping)
Draw(mesh)
[/code]

Best,
Michael

3

Hi，mneunteufel

Thank you for your reply!

Bset Regards
Yongbin Han