smesh/test/SMESH_box3_tetra.py

#  -*- coding: iso-8859-1 -*-
# Copyright (C) 2007-2023  CEA, EDF, 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, or (at your option) any later version.
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# Lesser General Public License for more details.
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# 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
#

# Tetrahedrization of the geometry union of 3 boxes aligned where the middle
# one has a race in common with the two others.
# Hypothesis and algorithms for the mesh generation are global
#
import salome
salome.salome_init()
import GEOM
from salome.geom import geomBuilder
geompy = geomBuilder.New()

import SMESH, SALOMEDS
from salome.smesh import smeshBuilder
smesh =  smeshBuilder.New()

# ---- define 3 boxes box1, box2 and box3

box1 = geompy.MakeBox(0., 0., 0., 100., 200., 300.)

idbox1 = geompy.addToStudy(box1, "box1")

print("Analysis of the geometry box1 :")
subShellList = geompy.SubShapeAll(box1, geompy.ShapeType["SHELL"])
subFaceList  = geompy.SubShapeAll(box1, geompy.ShapeType["FACE"])
subEdgeList  = geompy.SubShapeAll(box1, geompy.ShapeType["EDGE"])

print("number of Shells in box1 : ", len(subShellList))
print("number of Faces  in box1 : ", len(subFaceList))
print("number of Edges  in box1 : ", len(subEdgeList))

box2 = geompy.MakeBox(100., 0., 0., 200., 200., 300.)

idbox2 = geompy.addToStudy(box2, "box2")

print("Analysis of the geometry box2 :")
subShellList = geompy.SubShapeAll(box2, geompy.ShapeType["SHELL"])
subFaceList  = geompy.SubShapeAll(box2, geompy.ShapeType["FACE"])
subEdgeList  = geompy.SubShapeAll(box2, geompy.ShapeType["EDGE"])

print("number of Shells in box2 : ", len(subShellList))
print("number of Faces  in box2 : ", len(subFaceList))
print("number of Edges  in box2 : ", len(subEdgeList))

box3 = geompy.MakeBox(0., 0., 300., 200., 200., 500.)

idbox3 = geompy.addToStudy(box3, "box3")

print("Analysis of the geometry box3 :")
subShellList = geompy.SubShapeAll(box3, geompy.ShapeType["SHELL"])
subFaceList  = geompy.SubShapeAll(box3, geompy.ShapeType["FACE"])
subEdgeList  = geompy.SubShapeAll(box3, geompy.ShapeType["EDGE"])

print("number of Shells in box3 : ", len(subShellList))
print("number of Faces  in box3 : ", len(subFaceList))
print("number of Edges  in box3 : ", len(subEdgeList))

shell = geompy.MakePartition([box1, box2, box3])
idshell = geompy.addToStudy(shell,"shell")

print("Analysis of the geometry shell (union of box1, box2 and box3) :")
subShellList = geompy.SubShapeAll(shell, geompy.ShapeType["SHELL"])
subFaceList  = geompy.SubShapeAll(shell, geompy.ShapeType["FACE"])
subEdgeList  = geompy.SubShapeAll(shell, geompy.ShapeType["EDGE"])

print("number of Shells in shell : ", len(subShellList))
print("number of Faces  in shell : ", len(subFaceList))
print("number of Edges  in shell : ", len(subEdgeList))


### ---------------------------- SMESH --------------------------------------

# ---- init a Mesh with the shell

mesh = smesh.Mesh(shell, "MeshBox3")


# ---- set Hypothesis and Algorithm

print("-------------------------- NumberOfSegments")

numberOfSegments = 10

regular1D = mesh.Segment()
hypNbSeg = regular1D.NumberOfSegments(numberOfSegments)
print(hypNbSeg.GetName())
print(hypNbSeg.GetId())
print(hypNbSeg.GetNumberOfSegments())
smesh.SetName(hypNbSeg, "NumberOfSegments_" + str(numberOfSegments))

print("-------------------------- MaxElementArea")

maxElementArea = 500

triangle = mesh.Triangle()
hypArea = triangle.MaxElementArea(maxElementArea)
print(hypArea.GetName())
print(hypArea.GetId())
print(hypArea.GetMaxElementArea())
smesh.SetName(hypArea, "MaxElementArea_" + str(maxElementArea))

print("-------------------------- MaxElementVolume")

maxElementVolume = 500

netgen3D = mesh.Tetrahedron(smeshBuilder.NETGEN)
hypVolume = netgen3D.MaxElementVolume(maxElementVolume)
print(hypVolume.GetName())
print(hypVolume.GetId())
print(hypVolume.GetMaxElementVolume())
smesh.SetName(hypVolume, "MaxElementVolume_" + str(maxElementVolume))

print("-------------------------- compute shell")
ret = mesh.Compute()
print(ret)
if not ret:
    raise Exception("Error when computing Mesh")

log = mesh.GetLog(0) # no erase trace
# for linelog in log:
#     print(linelog)
print("Information about the MeshBox3:")
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 volumes     : ", mesh.NbVolumes())
print("Number of tetrahedrons: ", mesh.NbTetras())

salome.sg.updateObjBrowser()