Grouping Elements

Create a Standalone Group

import SMESH_mechanic

smesh  = SMESH_mechanic.smesh

mesh   = SMESH_mechanic.mesh

salome = SMESH_mechanic.salome

# Get ids of all faces with area > 100

aFilter = smesh.GetFilter(smesh.FACE, smesh.FT_Area, smesh.FT_MoreThan, 100.)

anIds = mesh.GetIdsFromFilter(aFilter)

# create a group consisting of faces with area > 100

aGroup = mesh.MakeGroupByIds("Area > 100", smesh.FACE, anIds)

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Create a Group on Geometry

import salome

import geompy

import smesh

# create a box

box = geompy.MakeBox(0., 0., 0., 100., 100., 100.)

geompy.addToStudy(box, "box")

# add the first face of the box to the study

subShapeList = geompy.SubShapeAll(box, geompy.ShapeType["FACE"])

face = subShapeList[0]

geompy.addToStudyInFather(box, face, "face 1")

# create group of edges on the face

aGeomGroupE = geompy.CreateGroup(face, geompy.ShapeType["EDGE"])

geompy.AddObject(aGeomGroupE, 3)

geompy.AddObject(aGeomGroupE, 6)

geompy.AddObject(aGeomGroupE, 8)

geompy.AddObject(aGeomGroupE, 10)

geompy.addToStudyInFather(face, aGeomGroupE, "Group of Edges")

# create quadrangle 2D mesh on the box

quadra = smesh.Mesh(box, "Box : quadrangle 2D mesh")

algo1D = quadra.Segment()

quadra.Quadrangle()

algo1D.NumberOfSegments(7)

# compute the mesh

quadra.Compute()

# create SMESH group on the face with name "SMESHGroup1"

aSmeshGroup1 = quadra.GroupOnGeom(face, "SMESHGroup1")

# create SMESH group on <aGeomGroupE> with default name

aSmeshGroup2 = quadra.GroupOnGeom(aGeomGroupE)

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Edit a Group

import SMESH_mechanic

smesh  = SMESH_mechanic.smesh

mesh   = SMESH_mechanic.mesh

salome = SMESH_mechanic.salome

# Get ids of all faces with area > 35

aFilter = smesh.GetFilter(smesh.FACE, smesh.FT_Area, smesh.FT_MoreThan, 35.)

anIds = mesh.GetIdsFromFilter(aFilter)

print "Criterion: Area > 35, Nb = ", len(anIds)

# create a group by adding elements with area > 35

aGroup = mesh.CreateEmptyGroup(smesh.FACE, "Area > 35")

aGroup.Add(anIds)

# Get ids of all faces with area > 40

aFilter = smesh.GetFilter(smesh.FACE, smesh.FT_Area, smesh.FT_MoreThan, 40.)

anIds = mesh.GetIdsFromFilter(aFilter)

print "Criterion: Area > 40, Nb = ", len(anIds)

# create a group of elements with area [35; 40] by removing elements with area > 40 from group aGroup

aGroup.Remove(anIds)

# print the result

aGroupElemIDs = aGroup.GetListOfID()

print "Criterion: 35 < Area < 40, Nb = ", len(aGroupElemIDs)

j = 1

for i in range(len(aGroupElemIDs)):

  if j > 20: j = 1; print ""

  print aGroupElemIDs[i],

  j = j + 1

  pass

print ""

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Union of two groups

import SMESH_mechanic

smesh  = SMESH_mechanic.smesh

mesh   = SMESH_mechanic.mesh

salome = SMESH_mechanic.salome

# Criterion : AREA > 20

aFilter = smesh.GetFilter(smesh.FACE, smesh.FT_Area, smesh.FT_MoreThan, 20.)

anIds = mesh.GetIdsFromFilter(aFilter)

print "Criterion: Area > 20, Nb = ", len( anIds )

# create a group by adding elements with area > 20

aGroup1 = mesh.CreateEmptyGroup(SMESH.FACE, "Area > 20")

aGroup1.Add(anIds)

# Criterion : AREA = 20

aFilter = smesh.GetFilter(smesh.FACE, smesh.FT_Area, smesh.FT_EqualTo, 20.)

anIds = mesh.GetIdsFromFilter(aFilter)

print "Criterion: Area = 20, Nb = ", len( anIds )

# create a group by adding elements with area = 20

aGroup2 = mesh.CreateEmptyGroup( smesh.FACE, "Area = 20" )

aGroup2.Add(anIds)

# create union group : area >= 20

aGroup3 = mesh.UnionGroups(aGroup1, aGroup2, "Area >= 20")

print "Criterion: Area >= 20, Nb = ", len(aGroup3.GetListOfID())

# Criterion : AREA < 20

aFilter = smesh.GetFilter(smesh.FACE, smesh.FT_Area, smesh.FT_LessThan, 20.)

anIds = mesh.GetIdsFromFilter(aFilter)

print "Criterion: Area < 20, Nb = ", len(anIds)

# create a group by adding elements with area < 20

aGroup4 = mesh.CreateEmptyGroup(smesh.FACE, "Area < 20")

aGroup4.Add(anIds)

# create union group : area >= 20 and area < 20

aGroup5 = mesh.UnionGroups(aGroup3, aGroup4, "Any Area")

print "Criterion: Any Area, Nb = ", len(aGroup5.GetListOfID())

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Intersection of two groups

import SMESH_mechanic

smesh  = SMESH_mechanic.smesh

mesh   = SMESH_mechanic.mesh

salome = SMESH_mechanic.salome

# Criterion : AREA > 20

aFilter = smesh.GetFilter(smesh.FACE, smesh.FT_Area, smesh.FT_MoreThan, 20.)

anIds = mesh.GetIdsFromFilter(aFilter)

print "Criterion: Area > 20, Nb = ", len(anIds)

# create a group by adding elements with area > 20

aGroup1 = mesh.CreateEmptyGroup(SMESH.FACE, "Area > 20")

aGroup1.Add(anIds)

# Criterion : AREA < 60

aFilter = smesh.GetFilter(smesh.FACE, smesh.FT_Area, smesh.FT_LessThan, 60.)

anIds = mesh.GetIdsFromFilter(aFilter)

print "Criterion: Area < 60, Nb = ", len(anIds)

# create a group by adding elements with area < 60

aGroup2 = mesh.CreateEmptyGroup(SMESH.FACE, "Area < 60")

aGroup2.Add(anIds)

# create an intersection of groups : 20 < area < 60

aGroup3 = mesh.IntersectGroups(aGroup1, aGroup2, "20 < Area < 60")

print "Criterion: 20 < Area < 60, Nb = ", len(aGroup3.GetListOfID())

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Cut of two groups

import SMESH_mechanic

smesh  = SMESH_mechanic.smesh

mesh   = SMESH_mechanic.mesh

salome = SMESH_mechanic.salome

# Criterion : AREA > 20

aFilter = smesh.GetFilter(smesh.FACE, smesh.FT_Area, smesh.FT_MoreThan, 20.)

anIds = mesh.GetIdsFromFilter(aFilter)

print "Criterion: Area > 20, Nb = ", len(anIds)

# create a group by adding elements with area > 20

aGroupMain = mesh.MakeGroupByIds("Area > 20", smesh.FACE, anIds)

# Criterion : AREA < 60

aFilter = smesh.GetFilter(smesh.FACE, smesh.FT_Area, smesh.FT_LessThan, 60.)

anIds = mesh.GetIdsFromFilter(aFilter)

print "Criterion: Area < 60, Nb = ", len(anIds)

# create a group by adding elements with area < 60

aGroupTool = mesh.MakeGroupByIds("Area < 60", smesh.FACE, anIds)

# create a cut of groups : area >= 60

aGroupRes = mesh.CutGroups(aGroupMain, aGroupTool, "Area >= 60")

print "Criterion: Area >= 60, Nb = ", len(aGroupRes.GetListOfID())

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