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4033fac1b3
Found via `codespell -q 3 -S ./external_dependencies/pybind11 -L alledges,allright,ane,anormal,ans,apoints,ba,boxs,cancle,childs,co-ordinate,co-ordinates,daty,enty,filld,hel,identifyable,ist,linz,lod,ned,nd,selt,statics,suround,thev,thist,thisy,timere,upto,wel`
72 lines
1.7 KiB
Python
72 lines
1.7 KiB
Python
from netgen.meshing import *
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from netgen.csg import *
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from ngsolve import ngsglobals
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ngsglobals.msg_level = 2
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# generate brick and mesh it
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geo1 = CSGeometry()
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geo1.Add (OrthoBrick( Pnt(0,0,0), Pnt(1,1,1) ))
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m1 = geo1.GenerateMesh (maxh=0.1)
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m1.Refine()
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# generate sphere and mesh it
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geo2 = CSGeometry()
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geo2.Add (Sphere (Pnt(0.5,0.5,0.5), 0.1))
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m2 = geo2.GenerateMesh (maxh=0.05)
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m2.Refine()
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m2.Refine()
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print ("****************************")
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print ("** merging surface meshes **")
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print ("****************************")
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# create an empty mesh
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mesh = Mesh()
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# a face-descriptor stores properties associated with a set of surface elements
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# bc .. boundary condition marker,
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# domin/domout .. domain-number in front/back of surface elements (0 = void),
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# surfnr .. number of the surface described by the face-descriptor
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fd_outside = mesh.Add (FaceDescriptor(bc=1,domin=1,surfnr=1))
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fd_inside = mesh.Add (FaceDescriptor(bc=2,domin=2,domout=1,surfnr=2))
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# copy all boundary points from first mesh to new mesh.
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# pmap1 maps point-numbers from old to new mesh
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pmap1 = { }
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for e in m1.Elements2D():
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for v in e.vertices:
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if (v not in pmap1):
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pmap1[v] = mesh.Add (m1[v])
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# copy surface elements from first mesh to new mesh
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# we have to map point-numbers:
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for e in m1.Elements2D():
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mesh.Add (Element2D (fd_outside, [pmap1[v] for v in e.vertices]))
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# same for the second mesh:
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pmap2 = { }
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for e in m2.Elements2D():
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for v in e.vertices:
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if (v not in pmap2):
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pmap2[v] = mesh.Add (m2[v])
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for e in m2.Elements2D():
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mesh.Add (Element2D (fd_inside, [pmap2[v] for v in e.vertices]))
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print ("******************")
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print ("** merging done **")
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print ("******************")
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mesh.GenerateVolumeMesh()
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mesh.Save ("newmesh.vol")
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