--- /dev/null
+# -*- 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()
+
+# Geometry
+# ========
+
+# an assembly of a box, a cylinder and a truncated cone meshed with tetrahedral.
+
+# Define values
+# -------------
+
+name = "ex21_lamp"
+
+cote = 60
+
+section = 20
+size = 200
+
+radius_1 = 80
+radius_2 = 40
+height = 100
+
+# Build a box
+# -----------
+
+box = geompy.MakeBox(-cote, -cote, -cote, +cote, +cote, +cote)
+
+# Build a cylinder
+# ----------------
+
+pt1 = geompy.MakeVertex(0, 0, cote/3)
+di1 = geompy.MakeVectorDXDYDZ(0, 0, 1)
+cyl = geompy.MakeCylinder(pt1, di1, section, size)
+
+# Build a truncated cone
+# ----------------------
+
+pt2 = geompy.MakeVertex(0, 0, size)
+cone = geompy.MakeCone(pt2, di1, radius_1, radius_2, height)
+
+# Fuse
+# ----
+
+box_cyl = geompy.MakeFuse(box, cyl)
+piece = geompy.MakeFuse(box_cyl, cone)
+
+# Add in study
+# ------------
+
+geompy.addToStudy(piece, name)
+
+# Create a group of faces
+# -----------------------
+
+group = geompy.CreateGroup(piece, geompy.ShapeType["FACE"])
+
+group_name = name + "_grp"
+geompy.addToStudy(group, group_name)
+group.SetName(group_name)
+
+# Add faces in the group
+# ----------------------
+
+faces = geompy.SubShapeAllIDs(piece, geompy.ShapeType["FACE"])
+
+geompy.UnionIDs(group, faces)
+
+# Create a mesh
+# =============
+
+# Define a mesh on a geometry
+# ---------------------------
+
+tetra = smesh.Mesh(piece, name)
+
+# Define 1D hypothesis
+# --------------------
+
+algo1d = tetra.Segment()
+algo1d.LocalLength(10)
+
+# Define 2D hypothesis
+# --------------------
+
+algo2d = tetra.Triangle()
+algo2d.LengthFromEdges()
+
+# Define 3D hypothesis
+# --------------------
+
+algo3d = tetra.Tetrahedron(smeshBuilder.NETGEN)
+algo3d.MaxElementVolume(100)
+
+# Compute the mesh
+# ----------------
+
+tetra.Compute()
+
+# Create a groupe of faces
+# ------------------------
+
+tetra.Group(group)
+
+# Update object browser
+# ---------------------
+
+salome.sg.updateObjBrowser()
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