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#!/usr/bin/env python
## Program: VMTK
## Module: $RCSfile: vmtkmesharrayoperation.py,v $
## Language: Python
## Date: $Date: 2005/09/14 09:49:59 $
## 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 vtkvmtk
import sys
import pypes
vmtkmesharrayoperation = 'vmtkMeshArrayOperation'
class vmtkMeshArrayOperation(pypes.pypeScript):
def __init__(self):
pypes.pypeScript.__init__(self)
self.Mesh = None
self.Mesh2 = None
self.InputArrayName = None
self.Input2ArrayName = None
self.ResultArrayName = "Result"
self.Constant = 0.0
self.Operation = 'add'
self.SetScriptName('vmtkmesharrayoperation')
self.SetScriptDoc('perform an operation between arrays of two meshes and store result in the first mesh')
self.SetInputMembers([
['Mesh','i','vtkUnstructuredGrid',1,'','the input mesh','vmtkmeshreader'],
['Mesh2','i2','vtkUnstructuredGrid',1,'','the second input mesh','vmtkmeshreader'],
['Operation','operation','str',1,'["multiplybyc","addc","add","subtract","min","max"]','the operation to be performed on the array; multiplybyc and addc only require the first input mesh to be specified'],
['Constant','constant','float',1,'','the value of the constant for multiplybyc and addc'],
['InputArrayName','iarray','str',1,'','the name of the array on the first mesh'],
['Input2ArrayName','i2array','str',1,'','the name of the array on the second mesh; if unspecified, InputArrayName is used'],
['ResultArrayName','resultarray','str',1,'','the name of the array where the result of the operation is stored']
])
self.SetOutputMembers([
['Mesh','o','vtkUnstructuredGrid',1,'','the output mesh','vmtkmeshwriter']
])
def Execute(self):
if self.Mesh == None:
self.PrintError('Error: No Mesh.')
if self.Mesh2 == None and self.Operation not in ["multiplybyc", "addc"]:
self.PrintError('Error: No Mesh2.')
array1 = self.Mesh.GetPointData().GetArray(self.InputArrayName)
array2 = None
if self.Operation not in ["multiplybyc", "addc"]:
if self.Input2ArrayName:
array2 = self.Mesh2.GetPointData().GetArray(self.Input2ArrayName)
else:
array2 = self.Mesh2.GetPointData().GetArray(self.InputArrayName)
resultArray = vtk.vtkDoubleArray()
resultArray.DeepCopy(array1)
resultArray.SetName(self.ResultArrayName)
for i in xrange(array1.GetNumberOfTuples()):
value1 = array1.GetTuple1(i)
value2 = None
if array2:
value2 = array2.GetTuple1(i)
resultValue = 0.0
if self.Operation == "multiplybyc":
resultValue = value1 * self.Constant
elif self.Operation == "addc":
resultValue = value1 + self.Constant
elif self.Operation == "add":
resultValue = value1 + value2
elif self.Operation == "subtract":
resultValue = value1 - value2
elif self.Operation == "min":
resultValue = min(value1, value2)
elif self.Operation == "max":
resultValue = max(value1, value2)
resultArray.SetValue(i,resultValue)
self.Mesh.GetPointData().AddArray(resultArray)
if __name__=='__main__':
main = pypes.pypeMain()
main.Arguments = sys.argv
main.Execute()
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