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#!/usr/bin/env python
import sys
import math
import numpy
import vtk
from vmtk import pypes
from vmtk import vmtkscripts
from vmtk import vtkvmtk
vmtkmeshmerge = 'vmtkMeshMerge'
class vmtkMeshMerge(pypes.pypeScript):
def __init__(self):
pypes.pypeScript.__init__(self)
self.SetScriptName("vmtkmeshmerge")
self.SetScriptDoc('Merge two or three meshes into one.')
self.Mesh = None
self.CellEntityIdsArrayName = "CellEntityIds"
self.max_meshes = 7
members = []
for i in range(1, self.max_meshes+1):
setattr(self, 'Mesh%d'%i, None)
members.append(['Mesh%d'%i, 'mesh%d'%i, 'vtkUnstructuredGrid', 1, '',
'mesh number %d to merge'%i, 'vmtkmeshreader'])
for i in range(1, self.max_meshes+1):
setattr(self, 'CellEntityIdOffset%d'%i, None)
members.append(['CellEntityIdOffset%d'%i, 'cellentityidoffset%d'%i, 'int', 1, '',
'offset added to cell entity ids from mesh%d'%i, ''])
# Member info: name, cmdlinename, typename, num, default, desc[, defaultpipetoscript]
self.SetInputMembers([
['CellEntityIdsArrayName', 'entityidsarray', 'str', 1, '',
'name of the array where entity ids have been stored'],
] + members)
self.SetOutputMembers([
['Mesh', 'o', 'vtkUnstructuredGrid', 1, '',
'the output mesh', 'vmtkmeshwriter'],
['CellEntityIdsArrayName', 'entityidsarray', 'str', 1, '',
'name of the array where entity ids have been stored'],
])
def Execute(self):
data = [(getattr(self, 'Mesh%d'%i), getattr(self, 'CellEntityIdOffset%d'%i))
for i in range(1,self.max_meshes+1)]
n = sum(0 if d[0] is None else 1 for d in data)
if n < 2:
self.PrintError('Error: Need at least 2 meshes to merge.')
def addIds(mesh, offset):
if mesh is not None and offset != 0:
cellids = mesh.GetCellData().GetScalars(self.CellEntityIdsArrayName)
for i in range(cellids.GetNumberOfTuples()):
cellids.SetValue(i, cellids.GetValue(i) + offset)
merger = vtkvmtk.vtkvmtkAppendFilter()
for mesh, offsets in data:
addIds(mesh, offsets)
if mesh != None:
merger.AddInput(mesh)
merger.SetMergeDuplicatePoints(1)
merger.Update()
self.Mesh = merger.GetOutput()
if __name__ == '__main__':
main = pypes.pypeMain()
main.Arguments = sys.argv
main.Execute()
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