# -*- coding: iso-8859-1 -*- # Copyright (C) 2007-2008 CEA/DEN, EDF R&D, OPEN CASCADE # # Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN, # CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS # # This library is free software; you can redistribute it and/or # modify it under the terms of the GNU Lesser General Public # License as published by the Free Software Foundation; either # version 2.1 of the License. # # This library is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # Lesser General Public License for more details. # # You should have received a copy of the GNU Lesser General Public # License along with this library; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA # # See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com # # Quadrangulation of the geometry generated by the Python script # SMESH_mechanic.py # The new Netgen algorithm is used that discretizes baoundaries itself # import salome import geompy geom = geompy.geom import smesh # ---------------------------- GEOM -------------------------------------- # ---- define contigous arcs and segment to define a closed wire p1 = geompy.MakeVertex( 100.0, 0.0, 0.0 ) p2 = geompy.MakeVertex( 50.0, 50.0, 0.0 ) p3 = geompy.MakeVertex( 100.0, 100.0, 0.0 ) arc1 = geompy.MakeArc( p1, p2, p3 ) p4 = geompy.MakeVertex( 170.0, 100.0, 0.0 ) seg1 = geompy.MakeVector( p3, p4 ) p5 = geompy.MakeVertex( 200.0, 70.0, 0.0 ) p6 = geompy.MakeVertex( 170.0, 40.0, 0.0 ) arc2 = geompy.MakeArc( p4, p5, p6 ) p7 = geompy.MakeVertex( 120.0, 30.0, 0.0 ) arc3 = geompy.MakeArc( p6, p7, p1 ) # ---- define a closed wire with arcs and segment List1 = [] List1.append( arc1 ) List1.append( seg1 ) List1.append( arc2 ) List1.append( arc3 ) wire1 = geompy.MakeWire( List1 ) Id_wire1 = geompy.addToStudy( wire1, "wire1" ) # ---- define a planar face with wire WantPlanarFace = 1 #True face1 = geompy.MakeFace( wire1, WantPlanarFace ) Id_face1 = geompy.addToStudy( face1, "face1" ) # ---- create a shape by extrusion pO = geompy.MakeVertex( 0.0, 0.0, 0.0 ) pz = geompy.MakeVertex( 0.0, 0.0, 100.0 ) vz = geompy.MakeVector( pO, pz ) prism1 = geompy.MakePrismVecH( face1, vz, 100.0 ) Id_prism1 = geompy.addToStudy( prism1, "prism1") # ---- create two cylinders pc1 = geompy.MakeVertex( 90.0, 50.0, -40.0 ) pc2 = geompy.MakeVertex( 170.0, 70.0, -40.0 ) radius = 20.0 height = 180.0 cyl1 = geompy.MakeCylinder( pc1, vz, radius, height ) cyl2 = geompy.MakeCylinder( pc2, vz, radius, height ) Id_Cyl1 = geompy.addToStudy( cyl1, "cyl1" ) Id_Cyl2 = geompy.addToStudy( cyl2, "cyl2" ) # ---- cut with cyl1 shape = geompy.MakeBoolean( prism1, cyl1, 2 ) # ---- fuse with cyl2 to obtain the final mechanic piece :) mechanic = geompy.MakeBoolean( shape, cyl2, 3 ) Id_mechanic = geompy.addToStudy( mechanic, "mechanic" ) # ---- Analysis of the geometry print "Analysis of the geometry mechanic :" subShellList = geompy.SubShapeAll(mechanic,geompy.ShapeType["SHELL"]) subFaceList = geompy.SubShapeAll(mechanic,geompy.ShapeType["FACE"]) subEdgeList = geompy.SubShapeAll(mechanic,geompy.ShapeType["EDGE"]) print "number of Shells in mechanic : ",len(subShellList) print "number of Faces in mechanic : ",len(subFaceList) print "number of Edges in mechanic : ",len(subEdgeList) ### ---------------------------- SMESH -------------------------------------- print "-------------------------- create Mesh, algorithm, hypothesis" mesh = smesh.Mesh(mechanic, "Mesh_mechanic"); netgen = mesh.Triangle(smesh.NETGEN) netgen.SetMaxSize( 50 ) #netgen.SetSecondOrder( 0 ) netgen.SetFineness( smesh.Fine ) netgen.SetQuadAllowed( 1 ) #netgen.SetOptimize( 1 ) salome.sg.updateObjBrowser(1) print "-------------------------- compute mesh" ret = mesh.Compute() print ret if ret != 0: print "Information about the MeshcompShel:" print "Number of nodes : ", mesh.NbNodes() print "Number of edges : ", mesh.NbEdges() print "Number of faces : ", mesh.NbFaces() print "Number of triangles : ", mesh.NbTriangles() print "Number of quadrangles : ", mesh.NbQuadrangles() print "Number of volumes : ", mesh.NbVolumes() print "Number of tetrahedrons : ", mesh.NbTetras() else: print "problem when computing the mesh"