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## Program: VMTK
## Module: $RCSfile: vmtksurfacearraysmoothing.py,v $
## Language: Python
## Date: $Date: 2014/10/24 12:35:13 $
## Version: $Revision: 1.10 $
## 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.
## Note: this class was contributed by
## Elena Faggiano (elena.faggiano@gmail.com)
## Politecnico di Milano
import vtk
import sys
import pypes
import math
vmtksurfacearraysmoothing = 'vmtkSurfaceArraySmoothing'
class vmtkSurfaceArraySmoothing(pypes.pypeScript):
def __init__(self):
pypes.pypeScript.__init__(self)
self.Surface = None
self.SurfaceArrayName = ''
self.Connexity = 1
self.Relaxation = 1.0
self.Iterations = 1
self.SetScriptName('vmtksurfacearraysmoothing')
self.SetScriptDoc('Perform smoothing of the point array defined on the surface')
self.SetInputMembers([
['Surface','i','vtkPolyData',1,'','the input surface','vmtksurfacereader'],
['SurfaceArrayName','surfacearray','str',1],
['Connexity','connexity','int',1,'(1,2)','patch connexity considered in the smoothing procedure'],
['Relaxation','relaxation','float',1,'(0.0,1.0)','relaxation factor'],
['Iterations','iterations','int',1,'','number of smoothing iterations']
])
self.SetOutputMembers([
['Surface','o','vtkPolyData',1,'','the output surface with the smoothed array','vmtksurfacewriter'],
])
def Execute(self):
if (self.Surface == None):
self.PrintError('Error: no Surface.')
if (self.Surface.GetPointData().GetArray(self.SurfaceArrayName) == None):
self.PrintError('Error: no array with name specified')
else:
array = self.Surface.GetPointData().GetArray(self.SurfaceArrayName)
surface = self.Surface
extractEdges = vtk.vtkExtractEdges()
extractEdges.SetInputData(surface)
extractEdges.Update()
surfEdges = extractEdges.GetOutput()
if self.Connexity == 1:
for n in range (self.Iterations):
for i in range (surfEdges.GetNumberOfPoints()):
cells = vtk.vtkIdList()
surfEdges.GetPointCells(i,cells)
vval = 0
ddd = 0
d = 0
N = 0
for j in range (cells.GetNumberOfIds()):
points = vtk.vtkIdList()
surfEdges.GetCellPoints(cells.GetId(j),points)
for k in range (points.GetNumberOfIds()):
if points.GetId(k) != i:
d = math.sqrt(vtk.vtkMath.Distance2BetweenPoints(surface.GetPoint(i),surface.GetPoint(points.GetId(k))))
dd = 1/d
val = array.GetComponent(points.GetId(k),0)#*dd
N = N+1
vval = vval + val
ddd = ddd + dd
val = array.GetComponent(i,0)
vval = vval / (N)
newval = self.Relaxation * vval + (1 - self.Relaxation) * val
array.SetTuple1(i,newval)
elif self.Connexity == 2:
for n in range (self.Iterations):
for i in range (surfEdges.GetNumberOfPoints()):
cells = vtk.vtkIdList()
surfEdges.GetPointCells(i,cells)
pointlist = vtk.vtkIdList()
vval = 0
ddd = 0
d = 0
N = 0
for j in range (cells.GetNumberOfIds()):
points = vtk.vtkIdList()
surfEdges.GetCellPoints(cells.GetId(j),points)
for k in range (points.GetNumberOfIds()):
if points.GetId(k) != i:
pointlist.InsertUniqueId(points.GetId(k))
cells2 = vtk.vtkIdList()
surfEdges.GetPointCells(i,cells2)
for p in range (cells2.GetNumberOfIds()):
points2 = vtk.vtkIdList()
surfEdges.GetCellPoints(cells2.GetId(j),points2)
for q in range (points2.GetNumberOfIds()):
if points2.GetId(k) != i:
pointlist.InsertUniqueId(points2.GetId(k))
N = pointlist.GetNumberOfIds()
for j in range (pointlist.GetNumberOfIds()):
d = math.sqrt(vtk.vtkMath.Distance2BetweenPoints(surface.GetPoint(i),surface.GetPoint(pointlist.GetId(j))))
dd = 1/d
val = array.GetComponent(pointlist.GetId(j),0)
vval = vval + val
ddd = ddd + dd
val = array.GetComponent(i,0)
vval = vval / (N)
newval = self.Relaxation * vval + (1 - self.Relaxation) * val
array.SetTuple1(i,newval)
else:
self.PrintError ('Error: wrong connexity')
self.Surface = surface
if __name__ == '__main__':
main = pypes.pypeMain()
main.Arguments = sys.argv
main.Execute()
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