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#!/usr/bin/env python
import sys
from vmtk import pypes
import vtk
vmtkentityrenumber = 'VmtkEntityRenumber'
class VmtkEntityRenumber(pypes.pypeScript):
def __init__(self):
pypes.pypeScript.__init__(self)
self.SetScriptName(vmtkentityrenumber)
self.SetScriptDoc('Renumber cell entity id array.')
self.Mesh = None
self.CellEntityIdsArrayName = "CellEntityIds"
self.CellEntityIdOffset = 0
self.CellEntityIdRenumbering = []
self.InteriorFacetsOffset = 0
# Member info: name, cmdlinename, typename, num, default, desc[, defaultpipetoscript]
self.SetInputMembers([
['Mesh', 'i', 'vtkUnstructuredGrid', 1, '',
'the input mesh', 'vmtkmeshreader'],
['CellEntityIdsArrayName', 'entityidsarray', 'str', 1, 'CellEntityIds',
'name of the array where entity ids have been stored'],
['CellEntityIdOffset', 'offset', 'int', 1, '',
'offset added to cell entity ids that are not mapped explicitly', ''],
['CellEntityIdRenumbering', 'renumbering', 'int', -1, '',
'[from1 to1] [from2 to2] ...', ''],
['InteriorFacetsOffset', 'interiorfacetsoffset', 'int', 1, '',
'offset added to ids of interior facets after renumbering mapping, to separate them from interior facets'],
])
self.SetOutputMembers([
['Mesh', 'o', 'vtkUnstructuredGrid', 1, '',
'the output mesh', 'vmtkmeshwriter'],
['CellEntityIdsArrayName', 'entityidsarray', 'str', 1, 'CellEntityIds',
'name of the array where entity ids have been stored'],
])
def Execute(self):
if self.Mesh == None:
self.PrintError('Error: No Mesh.')
if len(self.CellEntityIdRenumbering) % 2 != 0:
self.PrintError('Renumbering must have even length.')
renumbering = {}
for i in range(len(self.CellEntityIdRenumbering)/2):
a = self.CellEntityIdRenumbering[2*i]
b = self.CellEntityIdRenumbering[2*i+1]
renumbering[a] = b
cellids = self.Mesh.GetCellData().GetScalars(self.CellEntityIdsArrayName)
for i in range(cellids.GetNumberOfTuples()):
v = cellids.GetValue(i)
# Renumber or add offset
v = renumbering.get(v, v + self.CellEntityIdOffset)
# TODO: This is triangles/tets only
volumeTypes = (vtk.VTK_TETRA,)
faceTypes = (vtk.VTK_TRIANGLE,)
# Add offset if cell is an interior facet
if self.InteriorFacetsOffset:
if self.Mesh.GetCell(i).GetCellType() in faceTypes:
pIds = vtk.vtkIdList()
cIds = vtk.vtkIdList()
self.Mesh.GetCellPoints(i, pIds)
self.Mesh.GetCellNeighbors(i, pIds, cIds)
nIds = cIds.GetNumberOfIds()
if nIds == 2:
def getCellType(j):
return self.Mesh.GetCell(cIds.GetId(j)).GetCellType()
if all(getCellType(j) in volumeTypes for j in range(nIds)):
v += self.InteriorFacetsOffset
cellids.SetValue(i, v)
if __name__ == '__main__':
main = pypes.pypeMain()
main.Arguments = sys.argv
main.Execute()
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