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#!/usr/bin/env python
## Program: VMTK
## Module: $RCSfile: vmtkmarchingcubes.py,v $
## Language: Python
## Date: $Date: 2006/02/06 09:49:42 $
## Version: $Revision: 1.7 $
## 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
vmtkmarchingcubes = 'vmtkMarchingCubes'
class vmtkMarchingCubes(pypes.pypeScript):
def __init__(self):
pypes.pypeScript.__init__(self)
self.Image = None
self.Surface = None
self.ArrayName = ''
self.Level = 0.0
self.Connectivity = 0
self.SetScriptName('vmtkmarchingcubes')
self.SetScriptDoc('generate an isosurface of given level from a 3D image')
self.SetInputMembers([
['Image','i','vtkImageData',1,'','the input image','vmtkimagereader'],
['ArrayName','array','str',1,'','name of the array to work with'],
['Level','l','float',1,'','graylevel to generate the isosurface at'],
['Connectivity','connectivity','bool',1,'','only output the largest connected region of the isosurface']
])
self.SetOutputMembers([
['Surface','o','vtkPolyData',1,'','the output surface','vmtksurfacewriter']
])
def Execute(self):
if self.Image == None:
self.PrintError('Error: No Image.')
extent = self.Image.GetWholeExtent()
translateExtent = vtk.vtkImageTranslateExtent()
translateExtent.SetInput(self.Image)
translateExtent.SetTranslation(-extent[0],-extent[2],-extent[4])
translateExtent.Update()
if (self.ArrayName != ''):
translateExtent.GetOutput().GetPointData().SetActiveScalars(self.ArrayName)
marchingCubes = vtk.vtkMarchingCubes()
marchingCubes.SetInput(translateExtent.GetOutput())
marchingCubes.SetValue(0,self.Level)
marchingCubes.Update()
self.Surface = marchingCubes.GetOutput()
if self.Connectivity == 1:
connectivityFilter = vtk.vtkPolyDataConnectivityFilter()
connectivityFilter.SetInput(self.Surface)
connectivityFilter.SetExtractionModeToLargestRegion()
connectivityFilter.Update()
self.Surface = connectivityFilter.GetOutput()
if self.Surface.GetSource():
self.Surface.GetSource().UnRegisterAllOutputs()
if __name__=='__main__':
main = pypes.pypeMain()
main.Arguments = sys.argv
main.Execute()
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