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87 lines
2.5 KiB
Python
87 lines
2.5 KiB
Python
# Merging Elements
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import salome
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salome.salome_init_without_session()
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from salome.geom import geomBuilder
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geompy = geomBuilder.New()
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import SMESH
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from salome.smesh import smeshBuilder
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smesh = smeshBuilder.New()
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# create a face to be meshed
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px = geompy.MakeVertex(100., 0. , 0. )
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py = geompy.MakeVertex(0. , 100., 0. )
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pz = geompy.MakeVertex(0. , 0. , 100.)
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vxy = geompy.MakeVector(px, py)
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arc = geompy.MakeArc(py, pz, px)
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wire = geompy.MakeWire([vxy, arc])
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isPlanarFace = 1
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face1 = geompy.MakeFace(wire, isPlanarFace)
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id_face1 = geompy.addToStudy(face1, "Face1")
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# create a circle to be an extrusion path
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px1 = geompy.MakeVertex( 100., 100., 0.)
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py1 = geompy.MakeVertex(-100., -100., 0.)
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pz1 = geompy.MakeVertex( 0., 0., 50.)
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circle = geompy.MakeCircleThreePnt(py1, pz1, px1)
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id_circle = geompy.addToStudy(circle, "Path")
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# create a 2D mesh on the face
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trias = smesh.Mesh(face1, "Face : 2D mesh")
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algo1D = trias.Segment()
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algo1D.NumberOfSegments(6)
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algo2D = trias.Triangle()
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algo2D.LengthFromEdges()
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trias.Compute()
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# create a group of all triangles currently present in the mesh
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faceTriGroup = trias.Group( face1, "face triangles" )
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# create a path mesh
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circlemesh = smesh.Mesh(circle, "Path mesh")
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algo = circlemesh.Segment()
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algo.NumberOfSegments(10)
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circlemesh.Compute()
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# extrusion of the mesh
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trias.ExtrusionAlongPath([], circlemesh, circle, 1, MakeGroups=True )
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# get a group "opposite" to faceTriGroup within the generated prismatic mesh
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oppositeGroup = trias.GetGroupByName( faceTriGroup.GetName() + "_top" )[0]
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# get edges of the groups
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edgeGroup = trias.CreateDimGroup([ faceTriGroup, oppositeGroup ], SMESH.EDGE, "face edges")
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# merge nodes of the groups only
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print("Number of nodes before MergeNodes:", end=' ')
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trias.NbNodes()
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tolerance = 0.001
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array_of_nodes_groups = trias.FindCoincidentNodesOnPart([faceTriGroup, oppositeGroup], tolerance)
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trias.MergeNodes(array_of_nodes_groups)
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print("Number of nodes after MergeNodes:", trias.NbNodes())
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print("")
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print("Number of elements before MergeEqualElements:")
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print("Edges : ", trias.NbEdges())
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print("Faces : ", trias.NbFaces())
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print("Volumes : ", trias.NbVolumes())
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# merge elements of the groups
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equalFaces = trias.FindEqualElements( [faceTriGroup, oppositeGroup, edgeGroup] )
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trias.MergeElements( equalFaces )
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print("Number of elements after MergeEqualElements:")
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print("Edges : ", trias.NbEdges())
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print("Faces : ", trias.NbFaces())
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print("Volumes : ", trias.NbVolumes())
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salome.sg.updateObjBrowser()
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