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87 lines
2.4 KiB
Python
87 lines
2.4 KiB
Python
# Inspired by SMESH_mechanic.py.
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# Creates geometry and a mesh to be used in other examples
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# --------------------------------------------------------
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import salome
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salome.salome_init_without_session()
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import SMESH
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from salome.geom import geomBuilder
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from salome.smesh import smeshBuilder
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geom_builder = geomBuilder.New()
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smesh_builder = smeshBuilder.New()
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# Geometry
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# --------
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# create planar face on a wire combined from a segment and three arcs
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p1 = geom_builder.MakeVertex(100.0, 0.0, 0.0)
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p2 = geom_builder.MakeVertex(50.0, 50.0, 0.0)
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p3 = geom_builder.MakeVertex(100.0, 100.0, 0.0)
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arc1 = geom_builder.MakeArc(p1, p2, p3)
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p4 = geom_builder.MakeVertex(170.0, 100.0, 0.0)
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seg1 = geom_builder.MakeVector(p3, p4)
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p5 = geom_builder.MakeVertex(200.0, 70.0, 0.0)
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p6 = geom_builder.MakeVertex(170.0, 40.0, 0.0)
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arc2 = geom_builder.MakeArc(p4, p5, p6)
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p7 = geom_builder.MakeVertex(120.0, 30.0, 0.0)
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arc3 = geom_builder.MakeArc(p6, p7, p1)
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wire1 = geom_builder.MakeWire([arc1, seg1, arc2, arc3])
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face1 = geom_builder.MakeFace(wire1, True)
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# create main shape by extruding just created planar face
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pO = geom_builder.MakeVertex(0.0, 0.0, 0.0)
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pz = geom_builder.MakeVertex(0.0, 0.0, 100.0)
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vz = geom_builder.MakeVector(pO, pz)
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prism1 = geom_builder.MakePrismVecH(face1, vz, 100.0)
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# create two cylinders
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pc1 = geom_builder.MakeVertex(90.0, 50.0, -40.0)
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pc2 = geom_builder.MakeVertex(170.0, 70.0, -40.0)
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cyl1 = geom_builder.MakeCylinder(pc1, vz, 20.0, 180.0)
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cyl2 = geom_builder.MakeCylinder(pc2, vz, 20.0, 180.0)
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# create final shape by cutting one cylinder and fusing with another
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shape = geom_builder.MakeBoolean(prism1, cyl1, 2)
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mechanic = geom_builder.MakeBoolean(shape, cyl2, 3)
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# get all faces from shape and keep sub of them into variables for future processing
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shape_faces = geom_builder.SubShapeAllSorted(mechanic, geom_builder.ShapeType["FACE"])
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sub_face1 = shape_faces[0]
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sub_face2 = shape_faces[4]
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sub_face3 = shape_faces[5]
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sub_face4 = shape_faces[10]
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# Mesh
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# ----
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# create tria+tetra mesh from mechanic shape
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mesh = smesh_builder.Mesh(mechanic, "mechanic")
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mesh.Segment().NumberOfSegments(10)
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mesh.Triangle().MaxElementArea(25)
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mesh.Tetrahedron()
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# create quad sub-meshes on faces sub_face1 - sub_face4
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mesh.Quadrangle(sub_face1)
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mesh.Quadrangle(sub_face2)
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mesh.Quadrangle(sub_face3)
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mesh.Quadrangle(sub_face4)
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# finally compute whole mesh
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if not mesh.Compute(): raise Exception("Error when computing Mesh")
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