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<head>
<title>Grouping Elements</title>
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<h1>Grouping Elements</h1>
<h3><a name=bookmark>Create a Standalone Group</a></h3>
<p class="whs1">&nbsp;</p>
<p class="whs1">import SMESH</p>
<p class="whs1">import SMESH_mechanic</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">smesh &nbsp;=
SMESH_mechanic.smesh</p>
<p class="whs1">mesh &nbsp;&nbsp;=
SMESH_mechanic.mesh</p>
<p class="whs1">salome = SMESH_mechanic.salome</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">aFilterMgr = smesh.CreateFilterManager()</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># Criterion : AREA &gt;
100</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">aFunctor = aFilterMgr.CreateArea()</p>
<p class="whs1">aPredicate = aFilterMgr.CreateMoreThan()</p>
<p class="whs1">aPredicate.SetNumFunctor(
aFunctor )</p>
<p class="whs1">aPredicate.SetMargin(
100 )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">aFilter = aFilterMgr.CreateFilter()</p>
<p class="whs1">aFilter.SetPredicate(
aPredicate )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">anIds = aFilter.GetElementsId(
mesh )</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"># print the result</p>
<p class="whs1">print &quot;Criterion:
Area &gt; 100 Nb = &quot;, len( anIds )</p>
<p class="whs1">for i in range(
len( anIds ) ):</p>
<p class="whs1">&nbsp;&nbsp;print
anIds[ i ]</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># create a group consisting
of faces with area &gt; 100</p>
<p class="whs1">aGroup = mesh.CreateGroup(
SMESH.FACE, &quot;Area &gt; 100&quot; )</p>
<p class="whs1">aGroup.Add( anIds
)</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"><span style="font-family: 'Lucida Console', monospace;">salome.sg.updateObjBrowser(1)</span>
</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"><img src="pics/create_group.png" x-maintain-ratio="TRUE" width="430px" height="391px" border="0" class="img_whs3"></p>
<h3><a name=bookmark5>Create a Group on Geometry</a></h3>
<p class="whs1">import salome</p>
<p class="whs1">import geompy</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">import SMESH</p>
<p class="whs1">import StdMeshers</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">smesh = salome.lcc.FindOrLoadComponent(&quot;FactoryServer&quot;,
&quot;SMESH&quot;)</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"># create a box</p>
<p class="whs1">box = geompy.MakeBox(0.,
0., 0., 100., 100., 100.)</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"># add the box to the study</p>
<p class="whs1">idbox = geompy.addToStudy(box,
&quot;box&quot;)</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"># add the first face of
the box to the study</p>
<p class="whs1">subShapeList = geompy.SubShapeAll(box,
geompy.ShapeType[&quot;FACE&quot;])</p>
<p class="whs1">face = subShapeList[0]</p>
<p class="whs1">name = geompy.SubShapeName(face,
box)</p>
<p class="whs1">idface = geompy.addToStudyInFather(box,
face, name)</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"># create a hypothesis</p>
<p class="whs1">numberOfSegments
= 7</p>
<p class="whs1">hypNbSeg = smesh.CreateHypothesis(&quot;NumberOfSegments&quot;,
&quot;libStdMeshersEngine.so&quot;)</p>
<p class="whs1">hypNbSeg.SetNumberOfSegments(numberOfSegments)</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"># create algorithms</p>
<p class="whs1">regular1D = smesh.CreateHypothesis(&quot;Regular_1D&quot;,
&quot;libStdMeshersEngine.so&quot;)</p>
<p class="whs1">quad2D = smesh.CreateHypothesis(&quot;Quadrangle_2D&quot;,
&quot;libStdMeshersEngine.so&quot;)</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"># initialize a mesh with
the box</p>
<p class="whs1">mesh = smesh.CreateMesh(box)</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"># add hypotheses and algorithms
to the box</p>
<p class="whs1">mesh.AddHypothesis(box,hypNbSeg)</p>
<p class="whs1">mesh.AddHypothesis(box,regular1D)</p>
<p class="whs1">mesh.AddHypothesis(box,quad2D)</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"># compute the mesh</p>
<p class="whs1">ret = smesh.Compute(mesh,box)</p>
<p class="whs1">if ret == 0:</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;print
&quot;probleme when computing the mesh&quot;</p>
<p class="whs1">else:</p>
<p class="whs1">&nbsp;&nbsp;&nbsp;&nbsp;print
&quot;Computation succeded&quot;</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"># create geometry groups
on the face</p>
<p class="whs1">aGeomGroup1 = geompy.CreateGroup(face,
geompy.ShapeType[&quot;FACE&quot;])</p>
<p class="whs1">geompy.AddObject(aGeomGroup1,
1)</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">aGeomGroup2 = geompy.CreateGroup(face,
geompy.ShapeType[&quot;EDGE&quot;])</p>
<p class="whs1">geompy.AddObject(aGeomGroup2,
3)</p>
<p class="whs1">geompy.AddObject(aGeomGroup2,
6)</p>
<p class="whs1">geompy.AddObject(aGeomGroup2,
8)</p>
<p class="whs1">geompy.AddObject(aGeomGroup2,
10)</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">geompy.addToStudy(aGeomGroup1,
&quot;Group on Faces&quot;)</p>
<p class="whs1">geompy.addToStudy(aGeomGroup2,
&quot;Group on Edges&quot;)</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"># create SMESH groups</p>
<p class="whs1">aSmeshGroup1 = mesh.CreateGroupFromGEOM(SMESH.FACE,
&quot;SMESHGroup1&quot;,</p>
<p class="whs1">aGeomGroup1)</p>
<p class="whs1">aSmeshGroup2 = mesh.CreateGroupFromGEOM(SMESH.EDGE,
&quot;SMESHGroup2&quot;, aGeomGroup2)</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"><span style="font-family: 'Lucida Console', monospace;">salome.sg.updateObjBrowser(1)</span>
&nbsp;</p>
<p class="whs2">&nbsp;</p>
<h3><a name=bookmark1>Edit a Group</a></h3>
<p class="whs1">import SMESH</p>
<p class="whs1">import SMESH_mechanic</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">smesh &nbsp;=
SMESH_mechanic.smesh</p>
<p class="whs1">mesh &nbsp;&nbsp;=
SMESH_mechanic.mesh</p>
<p class="whs1">salome = SMESH_mechanic.salome</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">aFilterMgr = smesh.CreateFilterManager()</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># Criterion : AREA &gt;
20</p>
<p class="whs2">&nbsp;</p>
<p class="whs1">aFunctor = aFilterMgr.CreateArea()</p>
<p class="whs1">aPredicate = aFilterMgr.CreateMoreThan()</p>
<p class="whs1">aPredicate.SetNumFunctor(
aFunctor )</p>
<p class="whs1">aPredicate.SetMargin(
30 )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">aFilter = aFilterMgr.CreateFilter()</p>
<p class="whs1">aFilter.SetPredicate(
aPredicate )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">anIds = aFilter.GetElementsId(
mesh )</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># create a group by adding
elements with area &gt; 20</p>
<p class="whs1">aGroup = mesh.CreateGroup(
SMESH.FACE, &quot;Area &gt; 20&quot; )</p>
<p class="whs1">aGroup.Add( anIds
)</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">print &quot;Criterion:
Area &gt; 20 Nb = &quot;, len( anIds )</p>
<p class="whs1">for i in range(
len( anIds ) ):</p>
<p class="whs1">&nbsp;&nbsp;print
anIds[ i ]</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># Criterion : AREA &gt;
60</p>
<p class="whs2">&nbsp;</p>
<p class="whs1">aFunctor = aFilterMgr.CreateArea()</p>
<p class="whs1">aPredicate = aFilterMgr.CreateMoreThan()</p>
<p class="whs1">aPredicate.SetNumFunctor(
aFunctor )</p>
<p class="whs1">aPredicate.SetMargin(
60 )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">aFilter = aFilterMgr.CreateFilter()</p>
<p class="whs1">aFilter.SetPredicate(
aPredicate )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">anIds = aFilter.GetElementsId(
mesh )</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"># create a group of elements
with area [20; 60] by removing elements with area &gt; 60 from &nbsp;group
aGroup </p>
<p class="whs1">aGroup.Remove(anIds)</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"># print the result</p>
<p class="whs1">aGroupElemIDs =
aGroup.GetListOfID()</p>
<p class="whs1">print &quot;Criterion:
20 &lt; Area &lt; 60 = &quot;, len( aGroupElemIDs )</p>
<p class="whs1">for i in range(
len( aGroupElemIDs ) ):</p>
<p class="whs1">&nbsp;&nbsp;print
aGroupElemIDs[ i ]</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"><span style="font-family: 'Lucida Console', monospace;">salome.sg.updateObjBrowser(1)</span>
</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"><img src="pics/editing_groups1.png" x-maintain-ratio="TRUE" width="463px" height="417px" border="0" class="img_whs4"> &nbsp;<img src="pics/editing_groups2.png" x-maintain-ratio="TRUE" width="541px" height="417px" border="0" class="img_whs5"></p>
<h3><a name=bookmark2>Union of two groups</a></h3>
<p class="whs1">import SMESH</p>
<p class="whs1">import SMESH_mechanic</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">smesh &nbsp;=
SMESH_mechanic.smesh</p>
<p class="whs1">mesh &nbsp;&nbsp;=
SMESH_mechanic.mesh</p>
<p class="whs1">salome = SMESH_mechanic.salome</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">aFilterMgr = smesh.CreateFilterManager()</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># Criterion : AREA &gt;
20</p>
<p class="whs2">&nbsp;</p>
<p class="whs1">aFunctor = aFilterMgr.CreateArea()</p>
<p class="whs1">aPredicate = aFilterMgr.CreateMoreThan()</p>
<p class="whs1">aPredicate.SetNumFunctor(
aFunctor )</p>
<p class="whs1">aPredicate.SetMargin(
20 )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">aFilter = aFilterMgr.CreateFilter()</p>
<p class="whs1">aFilter.SetPredicate(
aPredicate )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">anIds = aFilter.GetElementsId(
mesh )</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># create a group by adding
elements with area &gt; 20</p>
<p class="whs1">aGroup1 = mesh.CreateGroup(
SMESH.FACE, &quot;Area &gt; 20&quot; )</p>
<p class="whs1">aGroup1.Add( anIds
)</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">print &quot;Criterion:
Area &gt; 20 Nb = &quot;, len( anIds )</p>
<p class="whs1">for i in range(
len( anIds ) ):</p>
<p class="whs1">&nbsp;&nbsp;print
anIds[ i ]</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># Criterion : AREA = 20</p>
<p class="whs2">&nbsp;</p>
<p class="whs1">aFunctor = aFilterMgr.CreateArea()</p>
<p class="whs1">aPredicate = aFilterMgr.CreateEqualTo()</p>
<p class="whs1">aPredicate.SetNumFunctor(
aFunctor )</p>
<p class="whs1">aPredicate.SetMargin(
20 )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">aFilter = aFilterMgr.CreateFilter()</p>
<p class="whs1">aFilter.SetPredicate(
aPredicate )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">anIds = aFilter.GetElementsId(
mesh )</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"># create a group by adding
elements with area &gt; 20</p>
<p class="whs1">aGroup2 = mesh.CreateGroup(
SMESH.FACE, &quot;Area = 20&quot; )</p>
<p class="whs1">aGroup2.Add( anIds
)</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">print &quot;Criterion:
Area = 20 Nb = &quot;, len( anIds )</p>
<p class="whs1">for i in range(
len( anIds ) ):</p>
<p class="whs1">&nbsp;&nbsp;print
anIds[ i ]</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"># create union group :
area &gt;= 20</p>
<p class="whs1">aGroup3 = mesh.UnionGroups(aGroup1,
aGroup2, &quot;Area &gt;= 20&quot;)</p>
<p class="whs1">print &quot;Criterion:
Area &gt;= 20 Nb = &quot;, len( aGroup3.GetListOfID() )</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># Criterion : AREA &lt;
20</p>
<p class="whs2">&nbsp;</p>
<p class="whs1">aFunctor = aFilterMgr.CreateArea()</p>
<p class="whs1">aPredicate = aFilterMgr.CreateLessThan()</p>
<p class="whs1">aPredicate.SetNumFunctor(
aFunctor )</p>
<p class="whs1">aPredicate.SetMargin(
20 )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">aFilter = aFilterMgr.CreateFilter()</p>
<p class="whs1">aFilter.SetPredicate(
aPredicate )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">anIds = aFilter.GetElementsId(
mesh )</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># create a group by adding
elements with area &lt; 20</p>
<p class="whs1">aGroup4 = mesh.CreateGroup(
SMESH.FACE, &quot;Area &lt; 20&quot; )</p>
<p class="whs1">aGroup4.Add( anIds
)</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">print &quot;Criterion:
Area &lt; 20 Nb = &quot;, len( anIds )</p>
<p class="whs1">for i in range(
len( anIds ) ):</p>
<p class="whs1">&nbsp;&nbsp;print
anIds[ i ]</p>
<p class="whs2">&nbsp;&nbsp;</p>
<p class="whs2"># create union group :
area &gt;= 20 and area &lt; 20</p>
<p class="whs1">aGroup5 = mesh.UnionGroups(aGroup3,
aGroup4, &quot;Any Area&quot;)</p>
<p class="whs1">print &quot;Criterion:
Any Area Nb = &quot;, len( aGroup5.GetListOfID() )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">salome.sg.updateObjBrowser(1)
</p>
<p class="whs1">&nbsp;</p>
<p class="whs1"><img src="pics/union_groups1.png" x-maintain-ratio="TRUE" width="394px" height="425px" border="0" class="img_whs6"></p>
<p class="whs1">&nbsp;</p>
<p class="whs1"><img src="pics/union_groups2.png" x-maintain-ratio="TRUE" width="368px" height="379px" border="0" class="img_whs7"> <img src="pics/union_groups3.png" x-maintain-ratio="TRUE" width="344px" height="381px" border="0" class="img_whs8"></p>
<p class="whs1">&nbsp;</p>
<h3><a name=bookmark3>Intersection of two groups</a></h3>
<p class="whs1">import SMESH</p>
<p class="whs1">import SMESH_mechanic</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">smesh &nbsp;=
SMESH_mechanic.smesh</p>
<p class="whs1">mesh &nbsp;&nbsp;=
SMESH_mechanic.mesh</p>
<p class="whs1">salome = SMESH_mechanic.salome</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">aFilterMgr = smesh.CreateFilterManager()</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># Criterion : AREA &gt;
20</p>
<p class="whs2">&nbsp;</p>
<p class="whs1">aFunctor = aFilterMgr.CreateArea()</p>
<p class="whs1">aPredicate = aFilterMgr.CreateMoreThan()</p>
<p class="whs1">aPredicate.SetNumFunctor(
aFunctor )</p>
<p class="whs1">aPredicate.SetMargin(
20 )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">aFilter = aFilterMgr.CreateFilter()</p>
<p class="whs1">aFilter.SetPredicate(
aPredicate )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">anIds = aFilter.GetElementsId(
mesh )</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># create a group by adding
elements with area &gt; 20</p>
<p class="whs1">aGroup1 = mesh.CreateGroup(
SMESH.FACE, &quot;Area &gt; 20&quot; )</p>
<p class="whs1">aGroup1.Add( anIds
)</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">print &quot;Criterion:
Area &gt; 20 Nb = &quot;, len( anIds )</p>
<p class="whs1">for i in range(
len( anIds ) ):</p>
<p class="whs1">&nbsp;&nbsp;print
anIds[ i ]</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># Criterion : AREA &lt;
60</p>
<p class="whs2">&nbsp;</p>
<p class="whs1">aFunctor = aFilterMgr.CreateArea()</p>
<p class="whs1">aPredicate = aFilterMgr.CreateLessThan()</p>
<p class="whs1">aPredicate.SetNumFunctor(
aFunctor )</p>
<p class="whs1">aPredicate.SetMargin(
60 )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">aFilter = aFilterMgr.CreateFilter()</p>
<p class="whs1">aFilter.SetPredicate(
aPredicate )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">anIds = aFilter.GetElementsId(
mesh )</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># create a group by adding
elements with area &lt; 60</p>
<p class="whs1">aGroup2 = mesh.CreateGroup(
SMESH.FACE, &quot;Area &lt; 60&quot; )</p>
<p class="whs1">aGroup2.Add( anIds
)</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">print &quot;Criterion:
Area &lt; 60 Nb = &quot;, len( anIds )</p>
<p class="whs1">for i in range(
len( anIds ) ):</p>
<p class="whs1">&nbsp;&nbsp;print
anIds[ i ]</p>
<p class="whs2">&nbsp;&nbsp;</p>
<p class="whs2"># create an intersection
of groups : 20 &lt; area &lt; 60</p>
<p class="whs1">aGroup3 = mesh.IntersectGroups(aGroup1,
aGroup2, &quot;20 &lt; Area &lt; 60&quot;)</p>
<p class="whs1">print &quot;Criterion:
20 &lt; Area &lt; 60 Nb = &quot;, len( aGroup3.GetListOfID() )</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"><span style="font-family: 'Lucida Console', monospace;">salome.sg.updateObjBrowser(1)</span>
</p>
<p class="whs2">&nbsp;</p>
<p class="whs2"><img src="pics/intersect_groups1.png" x-maintain-ratio="TRUE" width="314px" height="351px" border="0" class="img_whs9"> &nbsp;<img src="pics/intersect_groups2.png" x-maintain-ratio="TRUE" width="319px" height="351px" border="0" class="img_whs10"> &nbsp;<img src="pics/intersect_groups3.png" x-maintain-ratio="TRUE" width="304px" height="352px" border="0" class="img_whs11"></p>
<h3><a name=bookmark4>Cut of two groups</a></h3>
<p class="whs1">import SMESH</p>
<p class="whs1">import SMESH_mechanic</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">smesh &nbsp;=
SMESH_mechanic.smesh</p>
<p class="whs1">mesh &nbsp;&nbsp;=
SMESH_mechanic.mesh</p>
<p class="whs1">salome = SMESH_mechanic.salome</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">aFilterMgr = smesh.CreateFilterManager()</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># Criterion : AREA &gt;
20</p>
<p class="whs2">&nbsp;</p>
<p class="whs1">aFunctor = aFilterMgr.CreateArea()</p>
<p class="whs1">aPredicate = aFilterMgr.CreateMoreThan()</p>
<p class="whs1">aPredicate.SetNumFunctor(
aFunctor )</p>
<p class="whs1">aPredicate.SetMargin(
20 )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">aFilter = aFilterMgr.CreateFilter()</p>
<p class="whs1">aFilter.SetPredicate(
aPredicate )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">anIds = aFilter.GetElementsId(
mesh )</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># create a group by adding
elements with area &gt; 20</p>
<p class="whs1">aGroupMain = mesh.CreateGroup(
SMESH.FACE, &quot;Area &gt; 20&quot; )</p>
<p class="whs1">aGroupMain.Add(
anIds )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">print &quot;Criterion:
Area &gt; 20 Nb = &quot;, len( anIds )</p>
<p class="whs1">for i in range(
len( anIds ) ):</p>
<p class="whs1">&nbsp;&nbsp;print
anIds[ i ]</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># Criterion : AREA &lt;
60</p>
<p class="whs2">&nbsp;</p>
<p class="whs1">aFunctor = aFilterMgr.CreateArea()</p>
<p class="whs1">aPredicate = aFilterMgr.CreateLessThan()</p>
<p class="whs1">aPredicate.SetNumFunctor(
aFunctor )</p>
<p class="whs1">aPredicate.SetMargin(
60 )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">aFilter = aFilterMgr.CreateFilter()</p>
<p class="whs1">aFilter.SetPredicate(
aPredicate )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">anIds = aFilter.GetElementsId(
mesh )</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"># create a group by adding
elements with area &lt; 60</p>
<p class="whs1">aGroupTool = mesh.CreateGroup(
SMESH.FACE, &quot;Area &lt; 60&quot; )</p>
<p class="whs1">aGroupTool.Add(
anIds )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">print &quot;Criterion:
Area &lt; 60 Nb = &quot;, len( anIds )</p>
<p class="whs1">for i in range(
len( anIds ) ):</p>
<p class="whs1">&nbsp;&nbsp;print
anIds[ i ]</p>
<p class="whs2">&nbsp;&nbsp;</p>
<p class="whs2"># create an intersection
of groups : area &gt;= 60</p>
<p class="whs1">aGroupRes = mesh.CutGroups(aGroupMain,
aGroupTool, &quot;Area &gt;= 60&quot;)</p>
<p class="whs1">print &quot;Criterion:
Area &gt;= 60 Nb = &quot;, len( aGroupRes.GetListOfID() )</p>
<p class="whs1">&nbsp;</p>
<p class="whs1">salome.sg.updateObjBrowser(1)
</p>
<p class="whs1">&nbsp;</p>
<p class="whs2"><img src="pics/cut_groups1.png" x-maintain-ratio="TRUE" width="318px" height="355px" border="0" class="img_whs12"> &nbsp;<img src="pics/cut_groups2.png" x-maintain-ratio="TRUE" width="318px" height="355px" border="0" class="img_whs13"> &nbsp;<img src="pics/cut_groups3.png" x-maintain-ratio="TRUE" width="320px" height="354px" border="0" class="img_whs14"></p>
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