[Paraview] Multiblock dataset, ghost nodes and problem with rendering contours with opacity
Mohamad M. Nasr-Azadani
mmnasr at gmail.com
Tue Feb 8 13:34:06 EST 2011
Hi Seb,
Did you try to specify the WholeExtent to be the Whole system extent
and not the piece one ?
Yes I did, but it does not seem to be correct. Some wiggles appear on the
contour of the first partition of the dataset.
In both *.vtr files I changed the line as:
<RectilinearGrid WholeExtent="0 54 0 68 0 135">
But no luck!
Do you think the only way that it is gonna work is to first create *.pvtr
file for each time step and then use a *.pvd file to load all the
timesteps?
Thanks in advance,
Mohamad
On Tue, Feb 8, 2011 at 5:55 AM, Sebastien Jourdain <
sebastien.jourdain at kitware.com> wrote:
> Hi Mohamad,
>
> I thought you were working on an unstructured grid. As it is not the
> case you shouldn't bother with the array that I talked earlier.
> But you should provide the information that each piece is a part of a
> whole system and not a set of whole system shown in the same 3d world.
>
> Did you try to specify the WholeExtent to be the Whole system extent
> and not the piece one ?
>
> Seb
>
> On Mon, Feb 7, 2011 at 1:44 PM, Mohamad M. Nasr-Azadani
> <mmnasr at gmail.com> wrote:
> > Hi Seb,
> > I did not define any separate array. The only thing that I have done when
> > writing the *.vtr file for each subblock is something similar to this
> > File0.vtr
> > **************************************************
> > <?xml version="1.0"?>
> > <VTKFile type="RectilinearGrid" version="0.1" byte_order="LittleEndian"
> > compressor="vtkZLibDataCompressor">
> > <RectilinearGrid WholeExtent="0 27 0 68 0 135">
> > <Piece Extent="0 27 0 68 0 135">
> > <PointData>
> > <DataArray type="Float32" Name="Conc_0" format="appended"
> offset="0"
> > />
> > <DataArray type="Float32" Name="Conc_1" format="appended"
> > offset="1221128" />
> > <DataArray type="Float32" Name="Conc_2" format="appended"
> > offset="2406800" />
> > </PointData>
> > <CellData>
> > </CellData>
> > <Coordinates>
> > <DataArray type="Float32" Name="Array 0x9c7aad8"
> format="appended"
> > offset="3624188" />
> > <DataArray type="Float32" Name="Array 0x9c79e80"
> format="appended"
> > offset="3624376" />
> > <DataArray type="Float32" Name="Array 0x9c7ac00"
> format="appended"
> > offset="3624784" />
> > </Coordinates>
> > </Piece>
> > </RectilinearGrid>
> > <AppendedData encoding="base64">
> > ....
> > ********************************************************
> > File1.vtr
> > ********************************************************
> > <?xml version="1.0"?>
> > <VTKFile type="RectilinearGrid" version="0.1" byte_order="LittleEndian"
> > compressor="vtkZLibDataCompressor">
> > <RectilinearGrid WholeExtent="26 54 0 68 0 135">
> > <Piece Extent="26 54 0 68 0 135">
> > <PointData>
> > <DataArray type="Float32" Name="Conc_0" format="appended"
> offset="0"
> > />
> > <DataArray type="Float32" Name="Conc_1" format="appended"
> > offset="1365196" />
> > <DataArray type="Float32" Name="Conc_2" format="appended"
> > offset="2688228" />
> > </PointData>
> > <CellData>
> > </CellData>
> > <Coordinates>
> > <DataArray type="Float32" Name="Array 0x9c7aad8"
> format="appended"
> > offset="4047428" />
> > <DataArray type="Float32" Name="Array 0x9c79e80"
> format="appended"
> > offset="4047624" />
> > <DataArray type="Float32" Name="Array 0x9c7ac00"
> format="appended"
> > offset="4048032" />
> > </Coordinates>
> > </Piece>
> > </RectilinearGrid>
> > <AppendedData encoding="base64">
> > *****************************************************
> > (And many more datafiles similar to this).
> > As you can see, the two files have one layer of ghost nodes
> > File0.vatr
> > <RectilinearGrid WholeExtent="0 27 0 68 0 135">
> > File1.vtr
> > <RectilinearGrid WholeExtent="26 54 0 68 0 135">
> >
> > Now, I use a *.pvd file to load these files as "part" for each timestep.
> I
> > am not even using a *.pvtr.
> > Is it possible to do it the way I am doing it right now or do I need to
> use
> > *.pvtr file?
> > Thanks for you help,
> > Mohamad
> >
> > On Sun, Feb 6, 2011 at 6:30 PM, Sebastien Jourdain
> > <sebastien.jourdain at kitware.com> wrote:
> >>
> >> Hi Mohamad,
> >>
> >> Did you add a data array "GhostLevels" to specify for each cell its
> >> ghost level ?
> >> It's an unsigned char data array where the values are the depth into
> >> the next block for of each cell.
> >> By that I mean:
> >> - 0 is the cells of the current block
> >> - 1 is the set of cells that share points in the current block and the
> >> neighbor one.
> >>
> >> Seb
> >>
> >> On Sun, Feb 6, 2011 at 12:30 PM, Mohamad M. Nasr-Azadani
> >> <mmnasr at gmail.com> wrote:
> >> > Hey experts,
> >> > I am using several *.vtr files (as subblocks of the entire domain) and
> >> > then
> >> > use pvd file to load them in paraview.
> >> > As I have read in the manual, one needs to use at least one layer of
> >> > ghost
> >> > nodes on each subblock so that paraview can perform operations on any
> >> > given
> >> > dataset of that kind.
> >> > So far, everything is fine. However, the problem that I have is very
> >> > simple
> >> > yet annoying. When I use contours to represent the isosurface and then
> >> > any
> >> > opacity value less than 1.0, I can see the boundaries of each subblock
> >> > on
> >> > the contour surface. I have not been successful to fix this problem
> yet.
> >> > Any ideas on how to solve this issue?
> >> > Thanks,
> >> > Mohamad
> >> > PS: Attached, please find one snapshot of the contours + the annoying
> >> > line
> >> > appreaing on the isosurface.
> >> >
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