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#!/usr/bin/env python
## Program: VMTK
## Module: $RCSfile: vmtksurfaceconnectivity.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
vmtksurfaceconnectivity = 'vmtkSurfaceConnectivity'
class vmtkSurfaceConnectivity(pypes.pypeScript):
def __init__(self):
pypes.pypeScript.__init__(self)
self.Surface = None
self.ReferenceSurface = None
self.ClosestPoint = None
self.Method = 'largest'
self.GroupId = -1
self.GroupIdsArrayName = ''
self.CleanOutput = 0
self.SetScriptName('vmtksurfaceconnectivity')
self.SetScriptDoc('extract the largest connected region, the closest point-connected region or the scalar-connected region from a surface')
self.SetInputMembers([
['Surface','i','vtkPolyData',1,'','the input surface','vmtksurfacereader'],
['Method','method','str',1,'["largest","closest"]','connectivity method'],
['ClosestPoint','closestpoint','float',3,'','coordinates of the closest point'],
['ReferenceSurface','r','vtkPolyData',1,'','the reference surface, whose barycenter will be used as closest point for the connectivity filter','vmtksurfacereader'],
['CleanOutput','cleanoutput','bool',1,'','clean the unused points in the output'],
['GroupIdsArrayName','groupidsarray','str',1,'','name of the array containing the connectivity scalar'],
['GroupId','groupid','int',1,'','value of the connectivity scalar']
])
self.SetOutputMembers([
['Surface','o','vtkPolyData',1,'','the output surface','vmtksurfacewriter']
])
def Execute(self):
if self.Surface == None:
self.PrintError('Error: No input surface.')
if (self.GroupId != -1) & (self.GroupIdsArrayName!=''):
self.Surface.GetPointData().SetActiveScalars(self.GroupIdsArrayName)
barycenter = [0.0,0.0,0.0]
if self.Method == 'closest' and self.ClosestPoint == None:
n = self.ReferenceSurface.GetNumberOfPoints()
for i in xrange(n):
point = self.ReferenceSurface.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.vtkPolyDataConnectivityFilter()
connectivityFilter.SetInputData(self.Surface)
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)
if self.GroupId != -1:
connectivityFilter.ScalarConnectivityOn()
scalarRange = [self.GroupId,self .GroupId]
connectivityFilter.SetScalarRange(scalarRange)
connectivityFilter.Update()
self.Surface = connectivityFilter.GetOutput()
if self.CleanOutput == 1:
cleaner = vtk.vtkCleanPolyData()
cleaner.SetInputConnection(connectivityFilter.GetOutputPort())
cleaner.Update()
self.Surface = cleaner.GetOutput()
if __name__=='__main__':
main = pypes.pypeMain()
main.Arguments = sys.argv
main.Execute()
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