[vtkusers] Fwd: XDMF and hyperslabs

[victor sv]

---------- 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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