Stephenh

Author's details

Date registered: June 11, 2015

Latest posts

  1. ZFP Added to VTK — May 4, 2016
  2. 3D PDFs — August 18, 2015
  3. Python and VTK to get Vorticity — June 11, 2015

Author's posts listings

May 04

ZFP Added to VTK

Just trying to keep a log here.  I added the zfp .5 to VTK 7 to allow lossy compression to 3D datasets.  It works, but you do have to specify the extent of the data to the compressor separately.  I may be able to avoid this in the future, but this is what you get …

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Aug 18

3D PDFs

Last week I was asked to figure out how to embed 3D objects into PDF.  This seemed like it would be simple once I figured out which tools to use.  This is partially true, however Adobe decided to use U3D format for its internal 3D viewer, which seems less than universal in my opinion.  The …

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Jun 11

Python and VTK to get Vorticity

After a few days of understanding the VTK pipeline, I’ve finally figured out how to generate a vorticity cube from velocity cutout from the JHU Turbuelence database.  So here is the code! h5file = h5py.File(“temp.h5”, ‘r’) vtkdata = numpy_support.numpy_to_vtk(h5file[“u00000”][:,:,:,:].ravel(), deep=True, array_type=vtk.VTK_FLOAT) vtkdata.SetNumberOfComponents(3) #We have an x,y,z vector so reform it accordingly vtkdata.SetName(“Velocity”) image = vtk.vtkImageData() …

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