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#!/usr/bin/env python
## Program: VMTK
## Module: $RCSfile: vmtksurfacedecimation.py,v $
## Language: Python
## Date: $Date: 2006/02/23 09:27:52 $
## 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
vmtksurfacedecimation = 'vmtkSurfaceDecimation'
class vmtkSurfaceDecimation(pypes.pypeScript):
def __init__(self):
pypes.pypeScript.__init__(self)
self.Surface = None
self.TargetReduction = 0.5
self.BoundaryVertexDeletion = 0
self.SetScriptName('vmtksurfacedecimation')
self.SetScriptDoc('reduce the number of triangles in a surface')
self.SetInputMembers([
['Surface','i','vtkPolyData',1,'','the input surface','vmtksurfacereader'],
['TargetReduction','reduction','float',1,'(0.0,1.0)','desired number of triangles relative to input number of triangles'],
['BoundaryVertexDeletion','boundarydeletion','bool',1,'','toggle allow boundary point deletion']
])
self.SetOutputMembers([
['Surface','o','vtkPolyData',1,'','the output surface','vmtksurfacewriter']
])
def Execute(self):
if self.Surface == None:
self.PrintError('Error: No input surface.')
triangleFilter = vtk.vtkTriangleFilter()
triangleFilter.SetInputData(self.Surface)
triangleFilter.Update()
decimationFilter = vtk.vtkDecimatePro()
decimationFilter.SetInputConnection(triangleFilter.GetOutputPort())
decimationFilter.SetTargetReduction(self.TargetReduction)
decimationFilter.SetBoundaryVertexDeletion(self.BoundaryVertexDeletion)
decimationFilter.PreserveTopologyOn()
decimationFilter.Update()
cleaner = vtk.vtkCleanPolyData()
cleaner.SetInputConnection(decimationFilter.GetOutputPort())
cleaner.Update()
triangleFilter = vtk.vtkTriangleFilter()
triangleFilter.SetInputConnection(cleaner.GetOutputPort())
triangleFilter.Update()
self.Surface = triangleFilter.GetOutput()
if __name__=='__main__':
main = pypes.pypeMain()
main.Arguments = sys.argv
main.Execute()
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