[Paraview] Polyline visualization in ParaView

[Eric E. Monson]

Hey Christiano,

First, I think there may be a couple problems with the data file. It works better for me if I change to NumberOfElements="9" and remove the BaseOffset specifier. (I'm not sure what that part of the API is for...)

The Tube filter is for PolyData, and this file loads in as an Unstructured Grid (you can see this in the Information tab of the Object Inspector panel. One option is to use the Extract Surface filter to change this into a PolyData. I'm not sure if there is another way to just have the reader know this is PolyData in the first place.

After the changes in the first paragraph the Plot Over Line works fine for me, too. (I'm not sure about the Grid Connectivity filter since I never use it and don't really know what it does.)

Hope this helps get you started, at least,
-Eric

------------------------------------------------------
Eric E Monson
Duke Visualization Technology Group


On Apr 23, 2010, at 12:54 PM, Cristiano Malossi wrote:

> Dear all,
> 
> I would like export in an xdmf format the results of a 1D numerical simulation. Using "polyline" I have created a test file and I am able to visualize the line in paraview. However I have some issues:
> 
> 1) I would like to visualize a 3D cylinder instead of the line. However, tube filter is always gray and I cannot use it;
> 2) If I try to use the plot over line filter I get a segmentation fault;
> 3) If I try to see the grid connectivity with the related filter, I get a message error.
> 
> Probably there is something wrong in my data file, however I cannot find it.
> Could you help me, please?
> 
> Thank you.
> Best regards,
> 
>  Cristiano Malossi
> 
> PS: I am using ParaView 3.8, Linux 64.
> 
> -- 
>      Cristiano Malossi
>      Ph.D. Student
> 
>      EPFL - SB - MATHICSE
>      CMCS - Modeling and Scientific Computing
>      Office MA C2 577, Av.Piccard, Station 8.
>      CH-1015 Lausanne (Switzerland)
>      Ph.    : +41 21 693 2733
>      E-mail : cristiano.malossi at epfl.ch
> 
> 
> <?xml version="1.0" ?>
> <!DOCTYPE Xdmf SYSTEM "1D.xdmf" [ <!ENTITY DataFile ""> ]>
> <Xdmf>
>    <Domain Name="1D">
>        <Grid Name="Polyline" GridType="Uniform">
>            <Topology TopologyType="Polyline" NodesPerElement="2"
>             NumberOfElements="7" BaseOffset="1">
>                <DataItem Format="XML" DataType="Int" Dimensions="9 2">
> 				    0 1 
> 				    1 2
> 				    2 3
> 				    3 4
> 			        4 5
> 			        5 6
> 			        6 7
> 			        7 8
> 			        8 9
>                </DataItem>
>            </Topology>
> 
> 
>            <Geometry GeometryType="XYZ">
>                <DataItem Format="XML" Dimensions="10 3" DataType="Float">
> 			        0.0 0.0 0.0
> 			        0.1 0.0 0.0
> 			        0.2 0.0 0.0
> 			        0.3 0.0 0.0
> 			        0.4 0.0 0.0
> 			        0.5 0.0 0.0
> 			        0.6 0.0 0.0
> 			        0.7 0.0 0.0 
> 			        0.8 0.0 0.0
> 			        0.9 0.0 0.0
>        		</DataItem>
>            </Geometry>
> 
>            <Attribute AttributeType="Scalar" Center="Node" Name="Pressure">
>                <DataItem Format="XML" Dimensions="10 1" DataType="Float">
>                    0 
>                    1 
>                    2 
>                    3 
>                    4 
>                    5 
>                    6
>                    7 
>                    8 
>                    9
>                </DataItem>
>            </Attribute>
> 
>        </Grid>
>    </Domain>
> </Xdmf>
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