smesh/test/SMESH_Sphere.py

#  -*- coding: iso-8859-1 -*-
# Copyright (C) 2007-2023  CEA, EDF, OPEN CASCADE
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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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#  GEOM GEOM_SWIG : binding of C++ implementation with Python
#  File   : GEOM_Sphere.py
#  Author : Damien COQUERET, Open CASCADE
#  Module : GEOM
#  $Header: 
#
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()

import math

# It is an example of creating a hexahedrical mesh on a sphere.
#
# Used approach allows to avoid problems with degenerated and
# seam edges without special processing of geometrical shapes

#-----------------------------------------------------------------------
#Variables
Radius  = 100.
Dist    = Radius / 2.
Factor  = 2.5
Angle90 = math.pi / 2.
NbSeg   = 10

PointsList = []
ShapesList = []

#Basic Elements
P0 = geompy.MakeVertex(0., 0., 0.)
P1 = geompy.MakeVertex(-Dist, -Dist, -Dist)
P2 = geompy.MakeVertex(-Dist, -Dist, Dist)
P3 = geompy.MakeVertex(-Dist, Dist, Dist)
P4 = geompy.MakeVertex(-Dist, Dist, -Dist)

VZ = geompy.MakeVectorDXDYDZ(0., 0., 1.)

#Construction Elements
PointsList.append(P1)
PointsList.append(P2)
PointsList.append(P3)
PointsList.append(P4)
PointsList.append(P1)

PolyLine = geompy.MakePolyline(PointsList)

Face1 = geompy.MakeFace(PolyLine, 1)
Face2 = geompy.MakeScaleTransform(Face1, P0, Factor)
Face3 = geompy.MakeScaleTransform(Face1, P0, -1.)

#Models
Sphere = geompy.MakeSphereR(Radius)

Block = geompy.MakeHexa2Faces(Face1, Face2)
Cube  = geompy.MakeHexa2Faces(Face1, Face3)

Common1 = geompy.MakeBoolean(Sphere, Block, 1)
Common2 = geompy.MakeRotation(Common1, VZ, Angle90)

MultiBlock1 = geompy.MakeMultiTransformation1D(Common1, 20, -1, 3)
MultiBlock2 = geompy.MakeMultiTransformation1D(Common2, 30, -1, 3)

#Reconstruct sphere from several blocks
ShapesList.append(Cube)
ShapesList.append(MultiBlock1)
ShapesList.append(MultiBlock2)
Compound = geompy.MakeCompound(ShapesList)

Result = geompy.MakeGlueFaces(Compound, 0.1)

#addToStudy
Id_Sphere      = geompy.addToStudy(Sphere, "Sphere")
Id_Cube        = geompy.addToStudy(Cube, "Cube")

Id_Common1     = geompy.addToStudy(Common1, "Common1")
Id_Common2     = geompy.addToStudy(Common2, "Common2")

Id_MultiBlock1 = geompy.addToStudy(MultiBlock1, "MultiBlock1")
Id_MultiBlock2 = geompy.addToStudy(MultiBlock2, "MultiBlock2")

Id_Result      = geompy.addToStudy(Result, "Result")

#-----------------------------------------------------------------------
#Meshing
my_hexa = smesh.Mesh(Result, "Sphere_Mesh")
algo = my_hexa.Segment()
algo.NumberOfSegments(NbSeg)
my_hexa.Quadrangle()
my_hexa.Hexahedron()
isDone = my_hexa.Compute()
if not isDone:
    raise Exception("Error when computing Mesh")

salome.sg.updateObjBrowser()