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file-formatvtkvoxelparaview

How to represent voxel volume in VTK file format?

I have 3D binary array which represents a volume, where a[x,y,z] = 0 indicates no object and a[x,y,z] = 1 indicates the object region.

I want to save this as a VTK file and view it in ParaView. What is the simplest way to achieve this? Suggestions for other approaches are welcome.

I looked through the VTK file format, but I have not found direct way to achieve what I need, just via other structures.

Solution

  • It seems Paraview accepts raw data http://paraview.org/Wiki/Data_formats#Raw_files.
    So why not just write out your data in a triple for-loop to raw binary data?

    How to open raw data file in Paraview (edit):

    Example: Fuel from Uni Tuebingen

    1. open .raw file

    2. properties: Data Scalar Type: unsigned char
      properties: Data Extend: 1<tab>64<tab>1<tab>64<tab>1<tab>64
      properties: Apply

    3. click on Contour (next to the calculator symbol) properties: Apply

    Now you should see something. From here you can play around a bit.

    In VTK itself (i.e. calling from C++) I remember there were some nice volume render algorithms available (ray casting, 2D textures, etc) but I could not find them in paraview right now. Edit: But Robert could (see comment).