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rewrite create boundarylayer function (now more efficient and stable

Browse Source 
and easier)
This commit is contained in:
Christopher Lackner 2020-11-17 18:43:39 +01:00
parent 0d48924392
commit 609cbbcadf
4 changed files with 359 additions and 664 deletions
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968
libsrc/meshing/boundarylayer.cpp
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File diff suppressed because it is too large Load Diff

2
libsrc/meshing/boundarylayer.hpp
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@ -14,7 +14,7 @@ public:
// parameters by Philippose ..
Array<int> surfid;
Array<double> heights;
Array<size_t> new_matnrs;
string new_mat;
BitArray domains;
bool outside = false; // set the boundary layer on the outside
bool grow_edges = false;

39
libsrc/meshing/python_mesh.cpp
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@ -1017,9 +1017,8 @@ DLL_HEADER void ExportNetgenMeshing(py::module &m)
.def ("BoundaryLayer", [](Mesh & self, variant<string, int> boundary,
variant<double, py::list> thickness,
variant<string, py::list> material,
string material,
variant<string, int> domain, bool outside,
bool grow_edges,
optional<string> project_boundaries)
{
BoundaryLayerParameters blp;
@ -1050,6 +1049,7 @@ DLL_HEADER void ExportNetgenMeshing(py::module &m)
}
}
}
blp.new_mat = material;
if(project_boundaries.has_value())
{
@ -1070,34 +1070,13 @@ DLL_HEADER void ExportNetgenMeshing(py::module &m)
blp.heights.Append(val.cast<double>());
}
auto prismlayers = blp.heights.Size();
auto first_new_mat = self.GetNDomains() + 1;
auto max_dom_nr = first_new_mat;
if(string* pmaterial = get_if<string>(&material); pmaterial)
{
self.SetMaterial(first_new_mat, *pmaterial);
for(auto i : Range(prismlayers))
blp.new_matnrs.Append(first_new_mat);
}
else
{
auto materials = *get_if<py::list>(&material);
if(py::len(materials) != prismlayers)
throw Exception("Length of thicknesses and materials must be same!");
for(auto i : Range(prismlayers))
{
self.SetMaterial(first_new_mat+i, materials[i].cast<string>());
blp.new_matnrs.Append(first_new_mat + i);
}
max_dom_nr += prismlayers-1;
}
blp.domains.SetSize(max_dom_nr + 1); // one based
int nr_domains = self.GetNDomains();
blp.domains.SetSize(nr_domains + 1); // one based
blp.domains.Clear();
if(string* pdomain = get_if<string>(&domain); pdomain)
{
regex pattern(*pdomain);
for(auto i : Range(1, first_new_mat))
for(auto i : Range(1, nr_domains+1))
if(regex_match(self.GetMaterial(i), pattern))
blp.domains.SetBit(i);
}
@ -1106,19 +1085,15 @@ DLL_HEADER void ExportNetgenMeshing(py::module &m)
auto idomain = *get_if<int>(&domain);
blp.domains.SetBit(idomain);
}
// bits for new domains must be set
if(!outside)
for(auto i : Range(first_new_mat, max_dom_nr+1))
blp.domains.SetBit(i);
blp.outside = outside;
blp.grow_edges = grow_edges;
blp.grow_edges = true;
GenerateBoundaryLayer (self, blp);
self.UpdateTopology();
}, py::arg("boundary"), py::arg("thickness"), py::arg("material"),
py::arg("domains") = ".*", py::arg("outside") = false,
py::arg("grow_edges") = false, py::arg("project_boundaries")=nullopt,
py::arg("project_boundaries")=nullopt,
R"delimiter(
Add boundary layer to mesh.

14
tests/pytest/test_boundarylayer.py
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@ -18,7 +18,7 @@ def test_boundarylayer(outside, capfd):
mesh = unit_cube.GenerateMesh(maxh=0.3)
ne_before = mesh.ne
layer_surfacenames = ["right", "top", "left", "back", "bottom"]
mesh.BoundaryLayer("|".join(layer_surfacenames), [0.01, 0.02], "layer", outside=outside, grow_edges=True)
mesh.BoundaryLayer("|".join(layer_surfacenames), [0.01, 0.01], "layer", outside=outside)
should_ne = ne_before + 2 * GetNSurfaceElements(mesh, layer_surfacenames)
assert mesh.ne == should_ne
@ -26,7 +26,7 @@ def test_boundarylayer(outside, capfd):
assert not "elements are not matching" in capture.out
for side in ["front"]:
mesh.BoundaryLayer(side, [0.001, 0.002], "layer", outside=outside, grow_edges=True)
mesh.BoundaryLayer(side, [0.001, 0.001], "layer", outside=outside)
should_ne += 2 * GetNSurfaceElements(mesh, [side])
assert mesh.ne == should_ne
capture = capfd.readouterr()
@ -53,8 +53,8 @@ def test_boundarylayer2(outside, version, capfd):
geo.CloseSurfaces(top, bot, [])
mesh = geo.GenerateMesh()
should_ne = mesh.ne + 2 * GetNSurfaceElements(mesh, ["default"], "part")
layersize = 0.05
mesh.BoundaryLayer("default", [0.5 * layersize, layersize], "part", domains="part", outside=outside, grow_edges=True)
layersize = 0.025
mesh.BoundaryLayer("default", [layersize, layersize], "part", domains="part", outside=outside)
assert mesh.ne == should_ne
assert not "elements are not matching" in capfd.readouterr().out
import netgen.gui
@ -73,8 +73,7 @@ def test_wrong_orientation(outside):
mesh = geo.GenerateMesh()
mesh.BoundaryLayer(".*", 0.1, "air", domains="air", outside=outside,
grow_edges=True)
mesh.BoundaryLayer(".*", 0.1, "air", domains="air", outside=outside)
ngs = pytest.importorskip("ngsolve")
mesh = ngs.Mesh(mesh)
assert ngs.Integrate(1, mesh) == pytest.approx(1.2**3 if outside else 1)
@ -88,8 +87,7 @@ def test_splitted_surface():
geo.Add((brick*slots).mat("slot"))
mesh = geo.GenerateMesh()
mesh.BoundaryLayer(".*", [0.001, 0.002], "block", "block", outside=False,
grow_edges=True)
mesh.BoundaryLayer(".*", [0.001, 0.001], "block", "block", outside=False)
ngs = pytest.importorskip("ngsolve")
mesh = ngs.Mesh(mesh)
assert ngs.Integrate(1, mesh) == pytest.approx(1)