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https://git.salome-platform.org/gitpub/modules/smesh.git
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138 lines
4.5 KiB
Python
138 lines
4.5 KiB
Python
# -*- coding: iso-8859-1 -*-
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# Copyright (C) 2007-2022 CEA/DEN, EDF R&D, OPEN CASCADE
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#
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# Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
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# CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
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#
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# Quadrangulation of the geometry generated by the Python script
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# SMESH_mechanic.py
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# The new Netgen algorithm is used that discretizes baoundaries itself
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#
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import salome
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salome.salome_init()
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import GEOM
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from salome.geom import geomBuilder
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geompy = geomBuilder.New()
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import SMESH, SALOMEDS
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from salome.smesh import smeshBuilder
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smesh = smeshBuilder.New()
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# ---------------------------- GEOM --------------------------------------
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# ---- define contiguous arcs and segment to define a closed wire
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p1 = geompy.MakeVertex( 100.0, 0.0, 0.0 )
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p2 = geompy.MakeVertex( 50.0, 50.0, 0.0 )
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p3 = geompy.MakeVertex( 100.0, 100.0, 0.0 )
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arc1 = geompy.MakeArc( p1, p2, p3 )
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p4 = geompy.MakeVertex( 170.0, 100.0, 0.0 )
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seg1 = geompy.MakeVector( p3, p4 )
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p5 = geompy.MakeVertex( 200.0, 70.0, 0.0 )
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p6 = geompy.MakeVertex( 170.0, 40.0, 0.0 )
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arc2 = geompy.MakeArc( p4, p5, p6 )
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p7 = geompy.MakeVertex( 120.0, 30.0, 0.0 )
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arc3 = geompy.MakeArc( p6, p7, p1 )
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# ---- define a closed wire with arcs and segment
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List1 = []
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List1.append( arc1 )
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List1.append( seg1 )
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List1.append( arc2 )
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List1.append( arc3 )
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wire1 = geompy.MakeWire( List1 )
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Id_wire1 = geompy.addToStudy( wire1, "wire1" )
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# ---- define a planar face with wire
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WantPlanarFace = 1 #True
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face1 = geompy.MakeFace( wire1, WantPlanarFace )
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Id_face1 = geompy.addToStudy( face1, "face1" )
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# ---- create a shape by extrusion
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pO = geompy.MakeVertex( 0.0, 0.0, 0.0 )
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pz = geompy.MakeVertex( 0.0, 0.0, 100.0 )
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vz = geompy.MakeVector( pO, pz )
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prism1 = geompy.MakePrismVecH( face1, vz, 100.0 )
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Id_prism1 = geompy.addToStudy( prism1, "prism1")
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# ---- create two cylinders
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pc1 = geompy.MakeVertex( 90.0, 50.0, -40.0 )
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pc2 = geompy.MakeVertex( 170.0, 70.0, -40.0 )
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radius = 20.0
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height = 180.0
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cyl1 = geompy.MakeCylinder( pc1, vz, radius, height )
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cyl2 = geompy.MakeCylinder( pc2, vz, radius, height )
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Id_Cyl1 = geompy.addToStudy( cyl1, "cyl1" )
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Id_Cyl2 = geompy.addToStudy( cyl2, "cyl2" )
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# ---- cut with cyl1
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shape = geompy.MakeBoolean( prism1, cyl1, 2 )
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# ---- fuse with cyl2 to obtain the final mechanic piece :)
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mechanic = geompy.MakeBoolean( shape, cyl2, 3 )
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Id_mechanic = geompy.addToStudy( mechanic, "mechanic" )
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# ---- Analysis of the geometry
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print("Analysis of the geometry mechanic :")
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subShellList = geompy.SubShapeAll(mechanic,geompy.ShapeType["SHELL"])
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subFaceList = geompy.SubShapeAll(mechanic,geompy.ShapeType["FACE"])
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subEdgeList = geompy.SubShapeAll(mechanic,geompy.ShapeType["EDGE"])
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print("number of Shells in mechanic : ",len(subShellList))
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print("number of Faces in mechanic : ",len(subFaceList))
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print("number of Edges in mechanic : ",len(subEdgeList))
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### ---------------------------- SMESH --------------------------------------
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print("-------------------------- create Mesh, algorithm, hypothesis")
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mesh = smesh.Mesh(mechanic, "Mesh_mechanic");
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netgen = mesh.Triangle(smeshBuilder.NETGEN)
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netgen.SetMaxSize( 50 )
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#netgen.SetSecondOrder( 0 )
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netgen.SetFineness( smeshBuilder.Fine )
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netgen.SetQuadAllowed( 1 )
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#netgen.SetOptimize( 1 )
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print("-------------------------- compute mesh")
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ret = mesh.Compute()
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print(ret)
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if not ret:
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raise Exception("Error when computing Mesh")
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print("Information about the MeshcompShel:")
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print("Number of nodes : ", mesh.NbNodes())
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print("Number of edges : ", mesh.NbEdges())
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print("Number of faces : ", mesh.NbFaces())
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print("Number of triangles : ", mesh.NbTriangles())
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print("Number of quadrangles : ", mesh.NbQuadrangles())
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print("Number of volumes : ", mesh.NbVolumes())
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print("Number of tetrahedrons : ", mesh.NbTetras())
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salome.sg.updateObjBrowser()
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