[Paraview] paraview .vtk file format.

[Dominik Szczerba]

thats a lot of questions, I suggest to go one by one next time.
- google for example files
- study techdocs file formats pdf
- browse the archives (for code samples)
- buy the boox
- try out, read the code
- i dont think multiple time steps are possible in vtk format. keep time
data in files file.001 etc and PV will load them as time series.
otherwise I hear ensight format supports that.
good luck
dominik

Martin Jørgensen wrote:
> Hi,
> 
> I'm a complete newbie, so please don't be too hard on me if I ask 
> something stupid or if the information is clearly available somewhere  I
> didn't look... I downloaded the "VTK file formats" pdf-file, but  that's
> a lot of information for a newbie... So:
> 
> I've made a program in C that computes a couple of temperatures and 
> saves the result in a 2D-array as a function of timestep... (well,  the
> 2D array is overwritten each timestep, but I want to save them in  a
> file as a function of the timestep). And then I want to be able to 
> choose which time-step to look at in paraview...
> 
> I've made this .vtk-file manually just to get a feeling of how it  works
> (here I'm only looking at 2 temperatures):
> 
> - - - -
> # vtk DataFile Version 2.0
> Cube example
> ASCII
> DATASET POLYDATA
> POINTS 12 float
> 0.0 0.0 0.0
> 0.4 0.0 0.0
> 1.0 0.0 0.0
> 0.0 1.0 0.0
> 0.4 1.0 0.0
> 1.0 1.0 0.0
> 0.0 0.0 0.1
> 0.4 0.0 0.1
> 1.0 0.0 0.1
> 0.0 1.0 0.1
> 0.4 1.0 0.1
> 1.0 1.0 0.1
> 
> 
> POLYGONS 7 35
> 4 0 1 4 3
> 4 1 2 5 4
> 4 6 8 11 9
> 4 3 5 11 9
> 4 0 2 8 6
> 4 0 6 9 3
> 4 2 8 11 5
> 
> CELL_DATA 7
> SCALARS temperature double 1
> LOOKUP_TABLE default
> 700.0
> 500.0
> 20.0
> 20.0
> 20.0
> 20.0
> 20.0
> 
> - - - -
> Questions:
> 
> 1) The above works but how do I insert comments? For instance I would 
> like to be able to write "4 0 1 4 3      # front" and "0.0 0.0  0.1     
> # point 6", just as a reminder to myself... Is it possible?
> 
> 2) How to insert additional time-steps??? For instance, the 
> temperatures at the next time-step could look like:
> 
> LOOKUP_TABLE default
> 675.4
> 491.1
> 35.2
> 23.0
> 20.2
> 20.0
> 20.0
> 
> And for future time-steps I would get other temperatures etc...
> 
> 3) I have a lot of problems figuring out how to program a more  complex
> method of storing the temperatures for each cell and  calculating the
> points and figuring out how to connect these  points... Is there any
> hints on doing this or perhaps somebody  already programmed something in C?
> 
> Thanks in advance for any help...
> 
> 
> Martin
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-- 
Dominik Szczerba, Dr.
Computer Vision Lab CH-8092 Zurich
http://www.vision.ee.ethz.ch/~domi