[Paraview] Binary file read

[Mattijs Janssens]

I did manage to output the old binary format for a 3D mesh + data so if 
you want information on that...

I haven't managed yet to output binary and/or compressed in the new XML 
format. What a b.... to write! (unless you want to link in vtk) Like you 
I did manage the ascii XML. How do you do base64 encoding?

Kind regards,

Mattijs

Thomas Svedberg wrote:
> Hello,
> 
> Brian Dotson wrote:
> 
>> Thomas,
>>
>> Are you using the vtkXMLUnstructuredGridWriter class?  There are some 
>> pieces of test code in the documentation that will show you how to use 
>> the class.  If you have trouble, let me know and I'll find a code snipet.
> 
> 
> The problem is I am not using the vtk code at all, I am trying to write 
> my own small code snippet to export something for paraview to read.
> 
> ascii is no problem (to write/read), but I want to get smaller file and 
> hence use compression (and base64 encoding fore readability). Preferably 
> I want to have the datablocks inline.
> 
> So what are the format of such blocks for encoded only and compressed + 
> encoded ? It seems there is supposed to be a small header part followed 
> by the data. So far I tried the following, all base64 encoded (and with 
> no luck):
> 
> - no header, inline
> - no header, all data in one array before encoding
> - no header, every data encoded separately in the appended array
> - header (4 byte int) consisting av data size in bytes together with
>   data encoded inline
> - header and data encoded sepparately inline
> 
> all help would be appriciated.
> 
> /Thomas
> 
>>
>> Brian
>>
>>
>>
>>>>> Thomas Svedberg <Thomas.Svedberg at me.chalmers.se> 4/14/2005 10:57 AM 
>>>>> >>>
>>
>>
>> Could someone please give me pointers on how to write binary, compressed
>> files for reading into Paraview.
>> I use unstructured mesh (.vtu xml file)
>> So far all my attempts give errors, like "Floating exception", or 
>> "Cannot read point data array "v" from PointData in piece 0.  The data 
>> array in the element may be too short." or something else.
> 
> 


-- 

Mattijs Janssens

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