#  -*- coding: iso-8859-1 -*-
# Copyright (C) 2007-2022  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, or (at your option) any later version.
#
# 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
#

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()


# ---- GEOM

box   = geompy.MakeBox(0., 0., 0., 100., 200., 300.)
idbox = geompy.addToStudy(box, "box")

subShapeList = geompy.SubShapeAll(box, geompy.ShapeType["FACE"])
face   = subShapeList[0]
name   = geompy.SubShapeName(face, box)
idface = geompy.addToStudyInFather(box, face, name)

box  = salome.IDToObject(idbox)
face = salome.IDToObject(idface)

# ---- SMESH

smesh.UpdateStudy()
mesh = smesh.Mesh(box, "Meshbox")

# Set 1D algorithm/hypotheses to mesh
algo1 = mesh.Segment()
algo1.NumberOfSegments(10)

# Set 2D algorithm/hypotheses to mesh
algo2 = mesh.Triangle()
algo2.MaxElementArea(10)

# Create submesh on face
algo3 = mesh.Segment(face)
algo3.NumberOfSegments(10)
algo4 = mesh.Triangle(face)
algo4.MaxElementArea(100)
submesh = algo4.GetSubMesh()
smesh.SetName(submesh, "SubMeshFace")

mesh.Compute()

faces = submesh.GetElementsByType(SMESH.FACE)
if len(faces) > 1:
    print(len(faces), len(faces)/2)
    group1 = mesh.CreateEmptyGroup(SMESH.FACE,"Group of faces")
    group2 = mesh.CreateEmptyGroup(SMESH.FACE,"Another group of faces")
    group1.Add(faces[:int(len(faces)/2)])
    group2.Add(faces[int(len(faces)/2):])

salome.sg.updateObjBrowser()