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#!/usr/bin/env python
## Program: VMTK
## Module: $RCSfile: vmtkpointtransform.py,v $
## Language: Python
## Date: $Date: 2005/09/14 09:49:59 $
## Version: $Revision: 1.4 $
## 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
vmtkpointtransform = 'vmtkPointTransform'
class vmtkPointTransform(pypes.pypeScript):
def __init__(self):
pypes.pypeScript.__init__(self)
self.Points = []
self.MatrixCoefficients = []
self.InvertMatrix = 0
self.SetScriptName('vmtkpointtransform')
self.SetScriptDoc('transform points with a provided matrix')
self.SetInputMembers([
['Points','i','float',-1,'','point coordinates'],
['MatrixCoefficients','matrix','float',16,'','coefficients of transform matrix'],
['InvertMatrix','invert','bool',1,'','invert matrix before applying transformation']
])
self.SetOutputMembers([
['Points','o','float',-1,'','output point coordinates']
])
def Execute(self):
if len(self.Points) % 3 != 0:
self.PrintError('Error: Points not made up of triplets.')
return
matrix = vtk.vtkMatrix4x4()
matrix.DeepCopy(self.MatrixCoefficients)
if self.InvertMatrix:
matrix.Invert()
transform = vtk.vtkMatrixToLinearTransform()
transform.SetInput(matrix)
outputPoints = []
for i in range(len(self.Points)/3):
point = [self.Points[3*i+0],self.Points[3*i+1],self.Points[3*i+2]]
outputPoint = transform.TransformPoint(point)
outputPoints.append(outputPoint)
self.Points = outputPoints
if __name__=='__main__':
main = pypes.pypeMain()
main.Arguments = sys.argv
main.Execute()
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