Thank you for the answer, I'll try it. Till now I hadn't good result with plotting just the points.
George Markomanolis On Fri, Feb 6, 2009 at 3:16 PM, Burlen Loring <[email protected]>wrote: > George Markomanolis wrote: > >> I must write a script/ program to convert gnuplot file to paraview but I >> am not sure about the topology, I must declare the topolgy for every point, >> right? I am confused because I have a lot of constrains for example if a >> point is alone then the topology is vertex if there is another point then >> line etc... >> > One way you could simplify this is to use a "dual grid". Instead of > thinking about your data as point centered think of it as cell centered > where the data represents a constant value on a quad centered on your point. > Then once you construct a list of i,j indices for data that you want to > keep, traverse the list and generate a point set and quads. Then copy the > data you need to keep in the same order as you created your quads and insert > into the vtk poly data object as cell data rather than point data. This will > give you the same result as the gnu plot image you show and you won't have > to worry about degenerate cases like isolated vertices, and lines etc. > > > > > > > > George Markomanolis wrote: > >> Dear all, >> >> I am newbie to Paraview and I want to ask you something. I am working with >> signals and I use gnuplot for plotting. Unfortunately it's slow for big >> signals. Our program is parallel so we can create files of many GBs. We do a >> tricky parallel plot, every cpu plots a part of the signal, otherwise we >> couldn't see the image from gnuplot (crash). So when I saw paraview I liked >> a lot but it isn't easy. >> >> I must explain what I want to plot: >> We use a techinque in order to cut the points that haven't energy. For >> example a specific signal with 12000 x 12000 mesh of points which is 8GB >> file it can go under of 1GB if we cut the useless points. So I give at the >> gnuplot only the points that I want to plot x,y,z and I use pm3d map because >> I want them in 2D not 3D for example see the image: >> http://www.markomanolis.com/files/plots/plot.jpg I would like to ask. Is >> this unstructured grid? I show an easy signal it could be with more random >> points. I have tried unstructured grid for 2 columns only and there is no >> surface between the columns. I used triangle strip and it was ok but I don't >> know if I could see the details like here (here I don't cut any useless >> point, in first image see wave details in the center): >> http://www.markomanolis.com/files/plots/62_0_0.jpg , >> http://www.markomanolis.com/files/plots/resFinal.jpg . >> Could I have these plots with paraview or it is good with more complicated >> plots? >> I must write a script/ program to convert gnuplot file to paraview but I >> am not sure about the topology, I must declare the topolgy for every point, >> right? I am confused because I have a lot of constrains for example if a >> point is alone then the topology is vertex if there is another point then >> line etc... Is there any way to plot this grid with something like image >> data. I want to give something like structured grid but NOT to give all the >> points (I don't need them). The last two images I sent you are with all the >> points for education propose. I want to plot something like first image but >> witho more complicated topology >> Thank you for your time, >> George Markomanolis >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> ParaView mailing list >> [email protected] >> http://www.paraview.org/mailman/listinfo/paraview >> >> > >
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