# Free Edges

import SMESH_mechanic

smesh  = SMESH_mechanic.smesh
mesh   = SMESH_mechanic.mesh
salome = SMESH_mechanic.salome

aFilterMgr = smesh.CreateFilterManager()

# Remove some elements to obtain free edges
# Criterion : AREA > 95.
area_margin = 95.

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

anIds = mesh.GetIdsFromFilter(aFilter)

mesh.RemoveElements(anIds)

# Criterion : Free Edges
aBorders = mesh.GetFreeBorders() 

# create groups
aGroupF = mesh.CreateEmptyGroup(smesh.FACE, "Faces with free edges")
aGroupN = mesh.CreateEmptyGroup(smesh.NODE, "Nodes on free edges")

# fill groups with elements, corresponding to the criterion
print ""
print "Criterion: Free edges Nb = ", len(aBorders)
for i in range(len(aBorders)):
  aBorder = aBorders[i]
  print "Face # ", aBorder.myElemId, " : Edge between nodes (",
  print aBorder.myPnt1, ", ", aBorder.myPnt2, ")"

  aGroupF.Add([aBorder.myElemId])
  aGroupN.Add([aBorder.myPnt1, aBorder.myPnt2])

salome.sg.updateObjBrowser(1)