[Paraview] Re: Programmable Filter: UpdateProgress and input for Threshold

[Jerome Robert]

ok my first question was so stupid (i and numCells are integer not float). Any idea for the second one ?

On Thu, 15 Nov 2007 09:51:42 +0100, Jerome Robert <jeromerobert at users.sf.net> wrote:
> Hi all,
> 
> I wrote the following programmable filter in Paraview 3.2:
> 
> from math import sqrt
> pdi = self.GetInput()
> pdo = self.GetOutput()
> newData = paraview.vtkDoubleArray()
> newData.SetName("Max length edge")
> numCells = pdi.GetNumberOfCells()
> self.SetProgressText("Max length edge")
> 
> for i in range(0, numCells):
>        cell = pdi.GetCell(i)
>        value = max([ cell.GetEdge(i).GetLength2() for i in [0, 1, 2]])
>        newData.InsertNextValue(sqrt(value))
>        self.UpdateProgress(i/numCells)
> 
> pdo.GetCellData().AddArray(newData)
> 
> So I have 2 problems and questions:
> 
> - SetProgressText and UpdateProgress calls seems to be not taken into
> account (i.e. the progress bar stay grey). Is it because it's not yet
> supported or because my script is wrong ?
> - If I use this script in a Programmable filter, I can use its output as
> input for Threshold or Histogram filters. If I create a Custom Filter from
> this Programmable filter, it CANNOT be used as input for Threshold or
> Histogram. Why ?
> 
> Regards,
> 
> Jerome