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#!/usr/bin/env python
import sys
import vtk
import vtkvmtk
import pypes
vmtkmeshcompare = 'vmtkMeshCompare'
class vmtkMeshCompare(pypes.pypeScript):
def __init__(self):
pypes.pypeScript.__init__(self)
self.Mesh = None
self.ReferenceMesh = None
self.Method = ''
self.ArrayName = ''
self.Tolerance = 1E-8
self.Result = ''
self.ResultLog = ''
self.ResultData = None
self.SetScriptName('vmtkmeshcompare')
self.SetScriptDoc('compares a mesh against a reference')
self.SetInputMembers([
['Mesh','i','vtkUnstructuredGrid',1,'','the input mesh','vmtkmeshreader'],
['ReferenceMesh','r','vtkUnstructuredGrid',1,'','the reference mesh to compare against','vmtkmeshreader'],
['Method','method','str',1,'["quality","pointarray","cellarray"]','method of the test'],
['ArrayName','array','str',1,'','name of the array'],
['Tolerance','tolerance','float',1,'','tolerance for numerical comparisons'],
])
self.SetOutputMembers([
['Result','result','bool',1,'','Output boolean stating if meshes are equal or not'],
['ResultData','o','vtkUnstructuredGrid',1,'','the output mesh','vmtkmeshwriter'],
['ResultLog','log','str',1,'','Result Log']
])
def arrayCompare(self):
calculator = vtk.vtkArrayCalculator()
attributeData = None
referenceAttributeData = None
if self.Method == 'pointarray':
attributeData = self.Mesh.GetPointData()
referenceAttributeData = self.ReferenceMesh.GetPointData()
calculator.SetAttributeModeToUsePointData()
elif self.Method == 'cellarray':
attributeData = self.Mesh.GetCellData()
referenceAttributeData = self.ReferenceMesh.GetCellData()
calculator.SetAttributeModeToUseCellData()
if not self.ArrayName:
self.PrintError('Error: No ArrayName.')
if not referenceAttributeData.GetArray(self.ArrayName):
self.PrintError('Error: Invalid ArrayName.')
if not attributeData.GetArray(self.ArrayName):
self.PrintError('Error: Invalid ArrayName.')
referenceArrayName = 'Ref' + self.ArrayName
meshPoints = self.Mesh.GetNumberOfPoints()
referencePoints = self.ReferenceMesh.GetNumberOfPoints()
pointsDifference = meshPoints - referencePoints
self.PrintLog("Mesh points: "+ str(meshPoints))
self.PrintLog("Reference Points: " +str(referencePoints))
if abs(pointsDifference) > 0:
self.ResultLog = 'Uneven NumberOfPoints'
return False
refArray = referenceAttributeData.GetArray(self.ArrayName)
refArray.SetName(referenceArrayName)
attributeData.AddArray(refArray)
calculator.SetInputData(self.Mesh)
calculator.AddScalarVariable('a',self.ArrayName,0)
calculator.AddScalarVariable('b',referenceArrayName,0)
calculator.SetFunction("a - b")
calculator.SetResultArrayName('ResultArray')
calculator.Update()
self.ResultData = calculator.GetOutput()
if self.Method == 'pointarray':
resultRange = self.ResultData.GetPointData().GetArray('ResultArray').GetRange()
elif self.Method == 'cellarray':
resultRange = self.ResultData.GetCellData().GetArray('ResultArray').GetRange()
self.PrintLog('Result Range: ' + str(resultRange))
if max([abs(r) for r in resultRange]) < self.Tolerance:
return True
return False
def qualityCompare(self):
meshQuality = vtk.vtkMeshQuality()
meshQuality.SetInputData(self.Mesh)
meshQuality.RatioOn()
meshQuality.Update()
meshQualityOutput = meshQuality.GetOutput()
referenceQuality = vtk.vtkMeshQuality()
referenceQuality.SetInputData(self.ReferenceMesh)
referenceQuality.RatioOn()
referenceQuality.Update()
referenceQualityOutput = referenceQuality.GetOutput()
self.PrintLog("Mesh points: "+ str(meshQualityOutput.GetNumberOfPoints()))
self.PrintLog("Reference Points: " +str(referenceQualityOutput.GetNumberOfPoints()))
meshQualityRange = meshQualityOutput.GetCellData().GetArray("Quality").GetRange()
referenceQualityRange = referenceQualityOutput.GetCellData().GetArray("Quality").GetRange()
qualityRangeDifference = (meshQualityRange[0] - referenceQualityRange[0],meshQualityRange[1] - referenceQualityRange[1])
self.PrintLog("Mesh Quality Range: "+ str(meshQualityRange))
self.PrintLog("Reference Quality Range: "+ str(referenceQualityRange))
self.PrintLog("Quality Range Difference: "+ str(qualityRangeDifference))
if max(abs(d) for d in qualityRangeDifference) < self.Tolerance:
return True
return False
def Execute(self):
if not self.Mesh:
self.PrintError('Error: No mesh.')
if not self.ReferenceMesh:
self.PrintError('Error: No reference.')
if not self.Method:
self.PrintError('Error: No method.')
if self.Method == 'quality':
self.Result = self.qualityCompare()
elif self.Method in ['pointarray','cellarray']:
self.Result = self.arrayCompare()
if __name__=='__main__':
main = pypes.pypeMain()
main.Arguments = sys.argv
main.Execute()
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