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77 lines
2.1 KiB
Python
77 lines
2.1 KiB
Python
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import pytest
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from netgen.meshing import IdentificationType
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idtype = IdentificationType.CLOSESURFACES
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def test_two_boxes():
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occ = pytest.importorskip("netgen.occ")
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inner = occ.Box((0,0,0), (1,1,1))
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trafo = occ.gp_Trsf().Scale(inner.center, 1.1)
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outer = trafo(inner)
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inner.Identify(outer, "", idtype, trafo)
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shape = occ.Glue([outer-inner, inner])
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geo = occ.OCCGeometry(shape)
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mesh = geo.GenerateMesh(maxh=0.3)
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have_prisms = False
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for el in mesh.Elements3D():
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if len(el.vertices)==6:
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have_prisms = True
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break
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assert have_prisms
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def test_two_circles():
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occ = pytest.importorskip("netgen.occ")
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circ1 = occ.WorkPlane().Circle(1).Face()
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trafo = occ.gp_Trsf().Scale(circ1.center, 1.1)
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circ2 = trafo(circ1)
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circ1.edges[0].Identify(circ2.edges[0], "", idtype, trafo)
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circ2 -= circ1
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shape = occ.Glue([circ1, circ2])
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geo = occ.OCCGeometry(shape, 2)
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mesh = geo.GenerateMesh(maxh=0.2)
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have_quads = False
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for el in mesh.Elements2D():
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if len(el.vertices)==4:
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have_quads = True
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break
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assert have_quads
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def test_cut_identified_face():
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occ = pytest.importorskip("netgen.occ")
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from netgen.occ import Z, Box, Cylinder, Glue, OCCGeometry
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box = Box((-1,-1,0), (1,1,1))
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cyl = Cylinder( (0,0,0), Z, 0.5, 1 )
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box.faces.Min(Z).Identify(box.faces.Max(Z), "", idtype)
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shape = Glue([cyl, box])
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geo = OCCGeometry(shape)
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mesh = geo.GenerateMesh(maxh=0.5)
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for el in mesh.Elements3D():
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assert len(el.vertices)==6
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def test_identify_multiple_faces():
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occ = pytest.importorskip("netgen.occ")
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from netgen.occ import Z, Box, Cylinder, Glue, OCCGeometry, gp_Trsf
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box = Box((-1,-1,0), (1,1,1))
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cyl = Cylinder( (0,0,0), Z, 0.5, 1 )
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shape = Glue([box, cyl])
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bot_faces = shape.faces[Z < 0.1]
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top_faces = shape.faces[Z > 0.1]
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bot_faces.Identify(top_faces, "", idtype, gp_Trsf.Translation((0,0,1)))
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geo = OCCGeometry(shape)
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mesh = geo.GenerateMesh(maxh=0.3)
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for el in mesh.Elements3D():
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assert len(el.vertices)==6
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