[vtkusers] Pie chart from vtkDistancePolyDataFilter

[Koteswara Rao Ruvva]

I need to display distance distribution coming out of vtkDistancePolyDataFilter as a Pie chart.
Here is what I did, but my color distribution do not seems to matching with the colors on the Polydata object.
    numDistanceRanges = 10
#Step0: Create color table for distanceFilter and the PieChart        colorTable.SetHueRange(0.667, 0.0)    colorTable.SetNumberOfColors(numDistanceRanges)
    colorTable.Build()    distanceFilterMapper.SetLookupTable(colorTable)
#Step1: Get the distance values and divide that into 10 ranges and find their percentages
    distanceValues = distanceFilter.GetOutput().GetPointData().GetScalars()    
    #Divide the data into ten ranges using numpy histogram       dataRanges, data_edges = np.histogram(distanceValues, bins = numDistanceRanges)        #Find the percentages to display in the PieChart    totalDataRanges = sum(dataRanges)    dataRanges = [int(round(val*100/totalDataRanges)) for val in dataRanges]    #Step2: Setup PieChart data with the percent values    vtkValues = vtk.vtkIntArray()    vtkValues.SetNumberOfTuples(numDistanceRanges);
    for i in range(numDistanceRanges):        vtkValues.SetTuple1(i, dataRanges[i])
    #Provide the data to the pieChart
    distObj = vtk.vtkDataObject()    distObj.GetFieldData().AddArray(vtkValues)        pieChartActor.SetInputData(distObj)        #Step3: Setup PieChart colors    for i in range(numDistanceRanges):        rgbValue = colorTable.GetTableValue(i)        pieChartActor.SetPieceColor(i,rgbValue[0], rgbValue[1], rgbValue[2])        pieChartActor.SetPieceLabel(i, str(dataRanges[i]))
1. When the PieChart says 40% blue, I don't see 40% on the Polydata object from the distanceFilter2. Not sure if I am setting up the color table and getting the RGB values correctly3. Is there a better way to create PieChart out of DistanceFilter?
ThanksRao
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