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<h1>Grouping Elements</h1>
<h3><a name=bookmark>Create a Standalone Group</a></h3>
<p class="whs1">import SMESH_mechanic</p>
<p class="whs1"> </p>
<p class="whs1">smesh =
SMESH_mechanic.smesh</p>
<p class="whs1">mesh =
SMESH_mechanic.mesh</p>
<p class="whs1">salome = SMESH_mechanic.salome</p>
<p class="whs1"> </p>
<p class="whs2"># Get ids of all faces
with area > 100 </p>
<p class="whs1">aFilter = smesh.GetFilter(smesh.FACE,
smesh.FT_Area, smesh.FT_MoreThan, 100.)</p>
<p class="whs1"> </p>
<p class="whs1">anIds = mesh.GetIdsFromFilter(aFilter)
</p>
<p class="whs1"> </p>
<p class="whs3"># create a group consisting
of faces with area > 100</p>
<p class="whs1"> </p>
<p class="whs1">aGroup = mesh.MakeGroupByIds("Area
> 100", smesh.FACE, anIds)</p>
<p class="whs1"> </p>
<p class="whs3"><span style="font-family: 'Lucida Console', monospace;">salome.sg.updateObjBrowser(1)</span>
</p>
<p class="whs3"> </p>
<p class="whs3"><img src="pics/create_group.png" x-maintain-ratio="TRUE" width="430px" height="391px" border="0" class="img_whs4"></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">import smesh</p>
<p class="whs1"> </p>
<p class="whs2"># create a box</p>
<p class="whs1">box = geompy.MakeBox(0.,
0., 0., 100., 100., 100.)</p>
<p class="whs1">geompy.addToStudy(box,
"box")</p>
<p class="whs1"> </p>
<p class="whs2"># add the first face
of the box to the study</p>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">subShapeList
= geompy.SubShapeAll(box, geompy.ShapeType["FACE"])</span></p>
<p class="whs1">face = subShapeList[0]</p>
<p class="whs1">geompy.addToStudyInFather(box,
face, "face 1") </p>
<p class="whs1"> </p>
<p class="whs2"># create group of edges
on the face</p>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">aGeomGroupE
= geompy.CreateGroup(face, geompy.ShapeType["EDGE"])</span></p>
<p class="whs1">geompy.AddObject(aGeomGroupE,
3)</p>
<p class="whs1">geompy.AddObject(aGeomGroupE,
6)</p>
<p class="whs1">geompy.AddObject(aGeomGroupE,
8)</p>
<p class="whs1">geompy.AddObject(aGeomGroupE,
10)</p>
<p class="whs1">geompy.addToStudyInFather(face,
aGeomGroupE, "Group of Edges")</p>
<p class="whs1"> </p>
<p class="whs2"># create quadrangle
2D mesh on the box</p>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">quadra
= smesh.Mesh(box, "Box : quadrangle 2D mesh")</span></p>
<p class="whs1">algo1D = quadra.Segment()</p>
<p class="whs1">quadra.Quadrangle()</p>
<p class="whs1">algo1D.NumberOfSegments(7)
</p>
<p class="whs1"> </p>
<p class="whs2"># compute the mesh</p>
<p class="whs1">quadra.Compute()</p>
<p class="whs1"> </p>
<p class="whs2"># create SMESH group
on the face with name "SMESHGroup1"</p>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">aSmeshGroup1
= quadra.GroupOnGeom(face, "SMESHGroup1")</span></p>
<p class="whs1"> </p>
<p class="whs2"># create SMESH group
on <aGeomGroupE> with default name</p>
<p class="whs1">aSmeshGroup2 = quadra.GroupOnGeom(aGeomGroupE)
</p>
<p class="whs3"> </p>
<p class="whs3"><span style="font-family: 'Lucida Console', monospace;">salome.sg.updateObjBrowser(1)</span>
</p>
<h3><a name=bookmark1>Edit a Group</a></h3>
<p class="whs1">import SMESH_mechanic</p>
<p class="whs1"> </p>
<p class="whs1">smesh =
SMESH_mechanic.smesh</p>
<p class="whs1">mesh =
SMESH_mechanic.mesh</p>
<p class="whs1">salome = SMESH_mechanic.salome</p>
<p class="whs1"> </p>
<p class="whs2"># Get ids of all faces
with area > 35</p>
<p class="whs1">aFilter = smesh.GetFilter(smesh.FACE,
smesh.FT_Area, smesh.FT_MoreThan, 35.)</p>
<p class="whs1"> </p>
<p class="whs1">anIds = mesh.GetIdsFromFilter(aFilter)
</p>
<p class="whs1"> </p>
<p class="whs1">print "Criterion:
Area > 35, Nb = ", len(anIds)</p>
<p class="whs1"> </p>
<p class="whs2"># create a group by
adding elements with area > 35</p>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">aGroup
= mesh.CreateEmptyGroup(smesh.FACE, "Area > 35")</span></p>
<p class="whs1">aGroup.Add(anIds)
</p>
<p class="whs1"> </p>
<p class="whs2"># Get ids of all faces
with area > 40</p>
<p class="whs1">aFilter = smesh.GetFilter(smesh.FACE,
smesh.FT_Area, smesh.FT_MoreThan, 40.)</p>
<p class="whs1"> </p>
<p class="whs1">anIds = mesh.GetIdsFromFilter(aFilter)</p>
<p class="whs1"> </p>
<p class="whs1">print "Criterion:
Area > 40, Nb = ", len(anIds) </p>
<p class="whs1"> </p>
<p class="whs2"># create a group of
elements with area [35; 40] by removing elements with area > 40 from
group aGroup</p>
<p class="whs1">aGroup.Remove(anIds)
</p>
<p class="whs1"> </p>
<p class="whs2"># print the result</p>
<p class="whs1">aGroupElemIDs =
aGroup.GetListOfID()</p>
<p class="whs1"> </p>
<p class="whs1">print "Criterion:
35 < Area < 40, Nb = ", len(aGroupElemIDs)</p>
<p class="whs1">j = 1</p>
<p class="whs1">for i in range(len(aGroupElemIDs)):</p>
<p class="whs1"> if
j > 20: j = 1; print ""</p>
<p class="whs1"> print
aGroupElemIDs[i],</p>
<p class="whs1"> j
= j + 1</p>
<p class="whs1"> pass</p>
<p class="whs1">print ""</p>
<p class="whs1"> </p>
<p class="whs1">salome.sg.updateObjBrowser(1)
</p>
<p class="whs3"> </p>
<p class="whs3"><img src="pics/editing_groups1.png" x-maintain-ratio="TRUE" width="463px" height="417px" border="0" class="img_whs5"> <img src="pics/editing_groups2.png" x-maintain-ratio="TRUE" width="541px" height="417px" border="0" class="img_whs6"></p>
<h3><a name=bookmark2>Union of two groups</a></h3>
<p class="whs1">import SMESH_mechanic</p>
<p class="whs1"> </p>
<p class="whs1">smesh =
SMESH_mechanic.smesh</p>
<p class="whs1">mesh =
SMESH_mechanic.mesh</p>
<p class="whs1">salome = SMESH_mechanic.salome</p>
<p class="whs1"> </p>
<p class="whs2"># Criterion : AREA
> 20</p>
<p class="whs1">aFilter = smesh.GetFilter(smesh.FACE,
smesh.FT_Area, smesh.FT_MoreThan, 20.)</p>
<p class="whs1"> </p>
<p class="whs1">anIds = mesh.GetIdsFromFilter(aFilter)</p>
<p class="whs1"> </p>
<p class="whs1">print "Criterion:
Area > 20, Nb = ", len( anIds ) </p>
<p class="whs1"> </p>
<p class="whs2"># create a group by
adding elements with area > 20</p>
<p class="whs1">aGroup1 = mesh.CreateEmptyGroup(SMESH.FACE,
"Area > 20")</p>
<p class="whs1">aGroup1.Add(anIds)</p>
<p class="whs1"> </p>
<p class="whs2"># Criterion : AREA
= 20</p>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">aFilter
= smesh.GetFilter(smesh.FACE, smesh.FT_Area, smesh.FT_EqualTo, 20.)</span></p>
<p class="whs1"> </p>
<p class="whs1">anIds = mesh.GetIdsFromFilter(aFilter)</p>
<p class="whs1"> </p>
<p class="whs1">print "Criterion:
Area = 20, Nb = ", len( anIds ) </p>
<p class="whs1"> </p>
<p class="whs2"># create a group by
adding elements with area = 20</p>
<p class="whs1">aGroup2 = mesh.CreateEmptyGroup(
smesh.FACE, "Area = 20" )</p>
<p class="whs1"> </p>
<p class="whs1">aGroup2.Add(anIds)</p>
<p class="whs1"> </p>
<p class="whs2"># create union group
: area >= 20</p>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">aGroup3
= mesh.UnionGroups(aGroup1, aGroup2, "Area >= 20")</span></p>
<p class="whs1">print "Criterion:
Area >= 20, Nb = ", len(aGroup3.GetListOfID())</p>
<p class="whs1"> </p>
<p class="whs2"># Criterion : AREA
< 20</p>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">aFilter
= smesh.GetFilter(smesh.FACE, smesh.FT_Area, smesh.FT_LessThan, 20.)</span></p>
<p class="whs1"> </p>
<p class="whs1">anIds = mesh.GetIdsFromFilter(aFilter)</p>
<p class="whs1"> </p>
<p class="whs1">print "Criterion:
Area < 20, Nb = ", len(anIds)</p>
<p class="whs1"> </p>
<p class="whs2"># create a group by
adding elements with area < 20</p>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">aGroup4
= mesh.CreateEmptyGroup(smesh.FACE, "Area < 20")</span></p>
<p class="whs1">aGroup4.Add(anIds)</p>
<p class="whs1"> </p>
<p class="whs2"># create union group
: area >= 20 and area < 20</p>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">aGroup5
= mesh.UnionGroups(aGroup3, aGroup4, "Any Area")</span></p>
<p class="whs1">print "Criterion:
Any Area, Nb = ", len(aGroup5.GetListOfID())</p>
<p class="whs1"> </p>
<p class="whs1">salome.sg.updateObjBrowser(1)
</p>
<p class="whs1"> </p>
<p class="whs1"><img src="pics/union_groups1.png" x-maintain-ratio="TRUE" width="394px" height="425px" border="0" class="img_whs7"></p>
<p class="whs1"> </p>
<p class="whs1"><img src="pics/union_groups2.png" x-maintain-ratio="TRUE" width="368px" height="379px" border="0" class="img_whs8"> <img src="pics/union_groups3.png" x-maintain-ratio="TRUE" width="344px" height="381px" border="0" class="img_whs9"></p>
<p class="whs1"> </p>
<h3><a name=bookmark3>Intersection of two groups</a></h3>
<p class="whs1">import SMESH_mechanic</p>
<p class="whs1"> </p>
<p class="whs1">smesh =
SMESH_mechanic.smesh</p>
<p class="whs1">mesh =
SMESH_mechanic.mesh</p>
<p class="whs1">salome = SMESH_mechanic.salome</p>
<p class="whs1"> </p>
<p class="whs2"># Criterion : AREA
> 20</p>
<p class="whs1">aFilter = smesh.GetFilter(smesh.FACE,
smesh.FT_Area, smesh.FT_MoreThan, 20.)</p>
<p class="whs1"> </p>
<p class="whs1">anIds = mesh.GetIdsFromFilter(aFilter)</p>
<p class="whs1"> </p>
<p class="whs1">print "Criterion:
Area > 20, Nb = ", len(anIds) </p>
<p class="whs1"> </p>
<p class="whs2"># create a group by
adding elements with area > 20</p>
<p class="whs1">aGroup1 = mesh.CreateEmptyGroup(SMESH.FACE,
"Area > 20")</p>
<p class="whs1">aGroup1.Add(anIds)</p>
<p class="whs1"> </p>
<p class="whs2"># Criterion : AREA
< 60</p>
<p class="whs1">aFilter = smesh.GetFilter(smesh.FACE,
smesh.FT_Area, smesh.FT_LessThan, 60.)</p>
<p class="whs1"> </p>
<p class="whs1">anIds = mesh.GetIdsFromFilter(aFilter)</p>
<p class="whs1"> </p>
<p class="whs1">print "Criterion:
Area < 60, Nb = ", len(anIds) </p>
<p class="whs1"> </p>
<p class="whs2"># create a group by
adding elements with area < 60</p>
<p class="whs1">aGroup2 = mesh.CreateEmptyGroup(SMESH.FACE,
"Area < 60")</p>
<p class="whs1">aGroup2.Add(anIds)</p>
<p class="whs1"> </p>
<p class="whs2"># create an intersection
of groups : 20 < area < 60</p>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">aGroup3
= mesh.IntersectGroups(aGroup1, aGroup2, "20 < Area < 60")</span></p>
<p class="whs1">print "Criterion:
20 < Area < 60, Nb = ", len(aGroup3.GetListOfID())</p>
<p class="whs1"> </p>
<p class="whs1">salome.sg.updateObjBrowser(1)
</p>
<p class="whs3"> </p>
<p class="whs3"><img src="pics/intersect_groups1.png" x-maintain-ratio="TRUE" width="314px" height="351px" border="0" class="img_whs10"> <img src="pics/intersect_groups2.png" x-maintain-ratio="TRUE" width="319px" height="351px" border="0" class="img_whs11"> <img src="pics/intersect_groups3.png" x-maintain-ratio="TRUE" width="304px" height="352px" border="0" class="img_whs12"></p>
<h3><a name=bookmark4>Cut of two groups</a></h3>
<p class="whs1">import SMESH_mechanic</p>
<p class="whs1"> </p>
<p class="whs1">smesh =
SMESH_mechanic.smesh</p>
<p class="whs1">mesh =
SMESH_mechanic.mesh</p>
<p class="whs1">salome = SMESH_mechanic.salome</p>
<p class="whs1"> </p>
<p class="whs2"># Criterion : AREA
> 20</p>
<p class="whs1">aFilter = smesh.GetFilter(smesh.FACE,
smesh.FT_Area, smesh.FT_MoreThan, 20.)</p>
<p class="whs1"> </p>
<p class="whs1">anIds = mesh.GetIdsFromFilter(aFilter)</p>
<p class="whs1"> </p>
<p class="whs1">print "Criterion:
Area > 20, Nb = ", len(anIds) </p>
<p class="whs1"> </p>
<p class="whs2"># create a group by
adding elements with area > 20</p>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">aGroupMain
= mesh.MakeGroupByIds("Area > 20", smesh.FACE, anIds)</span></p>
<p class="whs1"> </p>
<p class="whs2"># Criterion : AREA
< 60</p>
<p class="whs1">aFilter = smesh.GetFilter(smesh.FACE,
smesh.FT_Area, smesh.FT_LessThan, 60.)</p>
<p class="whs1"> </p>
<p class="whs1">anIds = mesh.GetIdsFromFilter(aFilter)</p>
<p class="whs1"> </p>
<p class="whs1">print "Criterion:
Area < 60, Nb = ", len(anIds) </p>
<p class="whs1"> </p>
<p class="whs2"># create a group by
adding elements with area < 60</p>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">aGroupTool
= mesh.MakeGroupByIds("Area < 60", smesh.FACE, anIds)</span></p>
<p class="whs1"> </p>
<p class="whs2"># create a cut of groups
: area >= 60</p>
<p class="whs1"><span style="font-family: 'Lucida Console', monospace;">aGroupRes
= mesh.CutGroups(aGroupMain, aGroupTool, "Area >= 60")</span></p>
<p class="whs1">print "Criterion:
Area >= 60, Nb = ", len(aGroupRes.GetListOfID())</p>
<p class="whs1"> </p>
<p class="whs1">salome.sg.updateObjBrowser(1)
</p>
<p class="whs1"> </p>
<p class="whs3"><img src="pics/cut_groups1.png" x-maintain-ratio="TRUE" width="318px" height="355px" border="0" class="img_whs13"> <img src="pics/cut_groups2.png" x-maintain-ratio="TRUE" width="318px" height="355px" border="0" class="img_whs14"> <img src="pics/cut_groups3.png" x-maintain-ratio="TRUE" width="320px" height="354px" border="0" class="img_whs15"></p>
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