[vtkusers] Fwd: XDMF and hyperslabs

[Dan Lipsa]

There are (advanced) options to enable either xdmf2 or xdmf3 in VTK.

On Fri, Aug 14, 2015 at 6:27 AM, victor sv <victorsv at gmail.com> wrote:

>
> ---------- Forwarded message ----------
> From: victor sv <victorsv at gmail.com>
> Date: 2015-08-14 12:25 GMT+02:00
> Subject: XDMF and hyperslabs
> To: vtkdev <vtk-developers at vtk.org>, vtk-users at vtk.org, "
> paraview at paraview.org" <paraview at paraview.org>
>
>
> Hello all,
>
> I'm trying to create and visualize an XDMF/HDF5 file containing a
> partitioned mesh using hyperslabs.
>
> Is this supported by Paraview/VTK ??
>
> The HDF5 (solution1.h5) looks as follows:
>
> GROUP "/" {
>    GROUP "Grid" {
>       DATASET "Connectivities" {
>          DATATYPE  H5T_STD_I32BE
>          DATASPACE  SIMPLE { ( 18 ) / ( 18 ) }
>          DATA {
>          (0): 0, 1, 2, 3, 2, 1, 4, 5, 6, 7, 6, 5, 6, 7, 8, 9, 8, 7
>          }
>       }
>       DATASET "Coordinates" {
>          DATATYPE  H5T_IEEE_F64BE
>          DATASPACE  SIMPLE { ( 20 ) / ( 20 ) }
>          DATA {
>          (0): 0, 0, 1, 0, 0, 0.5, 1, 0.5, 0, 0.5, 1, 0.5, 0, 1, 1, 1, 0,
> 1.5,
>          (18): 1, 1.5
>          }
>       }
>       DATASET "Solution" {
>          DATATYPE  H5T_IEEE_F64BE
>          DATASPACE  SIMPLE { ( 10 ) / ( 10 ) }
>          DATA {
>          (0): 0, 0, 0, 0, 1, 1, 1, 1, 1, 1
>          }
>       }
>    }
> }
>
> And the XDMF file to represent  a 2-triangle (4 points) piece of the full
> mesh is:
>
> <?xml version="1.0" encoding="utf-8"?>
> <Xdmf xmlns:xi="http://www.w3.org/2001/XInclude">
>   <Domain>
>     <Grid CollectionType="Spatial" GridType="Collection" Name="Mesh">
>       <Grid Name="Grid1">
>         <Topology Dimensions="6" Type="Triangle">
>           <DataItem ItemType="HyperSlab" Dimensions="6" Type="HyperSlab">
>             <DataItem Dimensions="3 1" Format="XML"> 0 1 6 </DataItem>
>             <DataItem DataType="Int" Dimensions="18" Format="HDF"
> Precision="4">solution1.h5:Grid/Connectivities</DataItem>
>           </DataItem>
>         </Topology>
>         <Geometry GeometryType="XY">
>           <DataItem ItemType="HyperSlab" Dimensions="8" Type="HyperSlab">
>             <DataItem Dimensions="3 1" Format="XML"> 0 1 8 </DataItem>
>             <DataItem DataType="Float" Dimensions="20" Format="HDF"
> Precision="8">solution1.h5:Grid/Coordinates</DataItem>
>           </DataItem>
>         </Geometry>
>       </Grid>
>     </Grid>
>   </Domain>
> </Xdmf>
>
> I'm trying to use the syntax explained at the XDMF webpage (
> http://www.xdmf.org/index.php/XDMF_Model_and_Format ), but I'm feeling
> confused about the version of the documentation and current version of XDMF
> library included in VTK library.
>
> Can anyone give me some info about this?
> It is XDMFv3 already public ?
>
>
> Thanks in advance,
> Víctor.
>
>
>
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