[vtkusers] Does VTK have higher memory usage in python

[Jothybasu Selvaraj]

Use clip.SetInputConnection(input.GetOutputPort()).

Otherwise it will make a copy of the input foe each iteration!

Jothy

On Thu, Oct 27, 2011 at 11:04 AM, Bryn Lloyd <lloyd at itis.ethz.ch> wrote:

> Is the memory usage higher in python than in C++?****
>
> ** **
>
> I am not sure, but am having issues with large memory usage for simple
> things like clipping a large dataset.****
>
> ** **
>
> My system memory usage is around 20GB, the dataset on file is “only” 2GB.*
> ***
>
> ** **
>
> The pipeline looks like this: reader->clip polydata->writer****
>
> ** **
>
> ** **
>
> How can I reduce the memory footprint? Here is some example code:****
>
> ** **
>
> reader = vtkXMLPolyDataReader()****
>
> reader.SetFileName(ifname)****
>
> reader.Update()****
>
> input = reader.GetOutput()****
>
> ** **
>
> # do multiple clips****
>
> for k in range(10):****
>
>                 # compute implicit box (not shown)****
>
>                 clip = vtkClipPolyData()****
>
>                 clip.SetClipFunction(box)****
>
>                 clip.SetInput(input)****
>
>                 ****
>
>                 fnameo = bnameo + "_clipped%05d.vtp" % k****
>
>                 writer = vtkXMLPolyDataWriter()****
>
>                 writer.SetInput(clip.GetOutput())****
>
>                 writer.SetFileName(fnameo)****
>
>                 writer.SetDataModeToAppended()****
>
>                 writer.SetEncodeAppendedData(0)****
>
>                 writer.Write()****
>
> ** **
>
> ** **
>
> Thanks****
>
> Bryn****
>
> ** **
>
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-- 
Jothybasu K Selvaraj
PhD Student
University of Liverpool
Liverpool,UK
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