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returning gmsh object instead of making gmsh mesh #5

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returning gmsh object instead of making gmsh mesh #5

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13 changes: 4 additions & 9 deletions assembly_mesh_plugin/plugin.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,10 +5,10 @@
import gmsh


def assembly_to_gmsh(self, mesh_path="tagged_mesh.msh"):
def assembly_to_gmsh(self):
"""
Pack the assembly into a gmsh object, respecting assembly part names and face tags when creating
the physical groups.
Pack the assembly into a gmsh object, respecting assembly part names and
face tags when creating the physical groups.
"""

gmsh.initialize()
Expand Down Expand Up @@ -126,12 +126,7 @@ def assembly_to_gmsh(self, mesh_path="tagged_mesh.msh"):

gmsh.model.occ.synchronize()

gmsh.model.mesh.field.setAsBackgroundMesh(2)

gmsh.model.mesh.generate(3)
gmsh.write(mesh_path)

gmsh.finalize()
return gmsh


# Patch the new assembly functions into CadQuery's importers package
Expand Down
31 changes: 27 additions & 4 deletions tests/smoke_test.py
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Original file line number Diff line number Diff line change
@@ -1,3 +1,4 @@
from pathlib import Path
import assembly_mesh_plugin.plugin
from tests.sample_assemblies import (
generate_simple_nested_boxes,
Expand All @@ -14,8 +15,16 @@ def test_basic_assembly():
# Create the basic assembly
assy = generate_simple_nested_boxes()

# Create a mesh that has all the faces tagged as physical groups
assy.assemblyToGmsh(mesh_path="tagged_mesh.msh")
# Create a gmsh object that has all the faces tagged as physical groups
gmsh = assy.assemblyToGmsh()

# perform a simple mesh on the returned gmsh object
gmsh.model.mesh.field.setAsBackgroundMesh(2)
gmsh.model.mesh.generate(3)
gmsh.write("tagged_mesh.msh")
assert Path("tagged_mesh.msh").exists()
assert len(gmsh.model.getEntities(2)) == 16
gmsh.finalize()


def test_basic_cross_section():
Expand All @@ -27,7 +36,14 @@ def test_basic_cross_section():
assy = generate_test_cross_section()

# Create a mesh that has all the faces in the correct physical groups
assy.assemblyToGmsh(mesh_path="tagged_cross_section.msh")
gmsh = assy.assemblyToGmsh()

# perform a simple mesh on the returned gmsh object
gmsh.model.mesh.field.setAsBackgroundMesh(2)
gmsh.model.mesh.generate(3)
gmsh.write("tagged_cross_section.msh")
assert Path("tagged_cross_section.msh").exists()
gmsh.finalize()


def test_planar_coil():
Expand All @@ -39,4 +55,11 @@ def test_planar_coil():
assy = generate_assembly()

# Create a mesh that has all the faces in the correct physical groups
assy.assemblyToGmsh(mesh_path="tagged_planar_coil.msh")
gmsh = assy.assemblyToGmsh()

# perform a simple mesh on the returned gmsh object
gmsh.model.mesh.field.setAsBackgroundMesh(2)
gmsh.model.mesh.generate(3)
gmsh.write("tagged_cross_section.msh")
assert Path("tagged_cross_section.msh").exists()
gmsh.finalize()
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