smesh/test/SMESH_mechanic_netgen.py

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# -*- coding: iso-8859-1 -*-
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# Copyright (C) 2007-2024 CEA, EDF, OPEN CASCADE
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#
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# Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
# CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
#
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# 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
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# version 2.1 of the License, or (at your option) any later version.
#
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# 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.
#
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# 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
#
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# See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
#
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# Quadrangulation of the geometry generated by the Python script
# SMESH_mechanic.py
# The new Netgen algorithm is used that discretizes baoundaries itself
#
import salome
salome.salome_init()
import GEOM
from salome.geom import geomBuilder
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geompy = geomBuilder.New()
import SMESH, SALOMEDS
from salome.smesh import smeshBuilder
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smesh = smeshBuilder.New()
# ---------------------------- GEOM --------------------------------------
# ---- define contiguous 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
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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"])
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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 --------------------------------------
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print("-------------------------- create Mesh, algorithm, hypothesis")
mesh = smesh.Mesh(mechanic, "Mesh_mechanic");
netgen = mesh.Triangle(smeshBuilder.NETGEN)
netgen.SetMaxSize( 50 )
#netgen.SetSecondOrder( 0 )
netgen.SetFineness( smeshBuilder.Fine )
netgen.SetQuadAllowed( 1 )
#netgen.SetOptimize( 1 )
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print("-------------------------- compute mesh")
ret = mesh.Compute()
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print(ret)
if not ret:
raise Exception("Error when computing Mesh")
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())
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salome.sg.updateObjBrowser()