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#!/usr/bin/env python
## Program: VMTK
## Module: $RCSfile: vmtkmeshconnectivity.py,v $
## Language: Python
## Date: $Date: 2005/09/14 09:49:59 $
## Version: $Revision: 1.8 $
## Copyright (c) Luca Antiga, David Steinman. All rights reserved.
## See LICENCE file for details.
## This software is distributed WITHOUT ANY WARRANTY; without even
## the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
## PURPOSE. See the above copyright notices for more information.
import vtk
import sys
import pypes
vmtkmeshconnectivity = 'vmtkMeshConnectivity'
class vmtkMeshConnectivity(pypes.pypeScript):
def __init__(self):
pypes.pypeScript.__init__(self)
self.Mesh = None
self.ReferenceMesh = None
self.ClosestPoint = None
self.Method = 'largest'
self.SetScriptName('vmtkmeshconnectivity')
self.SetScriptDoc('extract the largest connected region or the closest point-connected region from a mesh')
self.SetInputMembers([
['Mesh','i','vtkUnstructuredGrid',1,'','the input mesh','vmtkmeshreader'],
['Method','method','str',1,'["largest","closest"]','connectivity method'],
['ClosestPoint','closestpoint','float',3,'','coordinates of the closest point'],
['ReferenceMesh','r','vtkUnstructuredGrid',1,'','the reference mesh, whose barycenter will be used as closest point for the connectivity filter','vmtkmeshreader']
])
self.SetOutputMembers([
['Mesh','o','vtkUnstructuredGrid',1,'','the output mesh','vmtkmeshwriter']
])
def Execute(self):
if self.Mesh == None:
self.PrintError('Error: No input mesh.')
barycenter = [0.0,0.0,0.0]
if self.Method == 'closest' and self.ClosestPoint == None:
n = self.ReferenceMesh.GetNumberOfPoints()
for i in xrange(n):
point = self.ReferenceMesh.GetPoint(i)
barycenter[0] += point[0]
barycenter[1] += point[1]
barycenter[2] += point[2]
barycenter[0] /= n
barycenter[1] /= n
barycenter[2] /= n
connectivityFilter = vtk.vtkConnectivityFilter()
connectivityFilter.SetInputData(self.Mesh)
connectivityFilter.ColorRegionsOff()
if self.Method == 'largest':
connectivityFilter.SetExtractionModeToLargestRegion()
elif self.Method == 'closest':
connectivityFilter.SetExtractionModeToClosestPointRegion()
if self.ClosestPoint:
connectivityFilter.SetClosestPoint(self.ClosestPoint)
else:
connectivityFilter.SetClosestPoint(barycenter)
connectivityFilter.Update()
self.Mesh = connectivityFilter.GetOutput()
if __name__=='__main__':
main = pypes.pypeMain()
main.Arguments = sys.argv
main.Execute()
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