[vtkusers] Any more for Particle/Meshless formats

[Andrew Parker]

Hi,

Just wanted to see if there were any more comments/input into the best way
to read and write particle/meshless based formats for vtk and then
subsequently paraview?

Anybody who has used vtk/paraview for lagrangian/SPH/DEM etc type
approaches please feel free to chime-in indicating the best approach for
constantly updating node positions, no associated connectivity, and
unsteady data associated with those nodes as a function of space and time.

Questions are:  Which vtk file format and mesh format for the above.

Cheers again,
Andy

On 14 June 2012 16:34, George Zagaris <george.zagaris at kitware.com> wrote:

> Yes, you are right. In what I described, you would need a file for
> each time-step. I don't know of an already implemented reader/writer
> that would allow you to store multiple time-steps in a single file. I
> cc'ed the list in case someone else has more ideas on this.
>
> Best,
> George
>
> On Thu, Jun 14, 2012 at 11:19 AM, Andrew Parker
> <andy.john.parker at googlemail.com> wrote:
> > Hi,
> >
> > Thanks for that, I had this as my first idea but I'm right in thinking
> that
> > would require one file for every new position of particles?  Is there no
> way
> > to have that file store multiple position each associated with a time
> step
> > all in one file?  I'm guessing that's not a vtkUnstructuredGrid??  Is
> there
> > such a file?
> >
> > Cheers,
> > Andy
> >
> >
> > On 14 June 2012 15:59, George Zagaris <george.zagaris at kitware.com>
> wrote:
> >>
> >> One possibility is to store the particles in a vtkUnstructuredGrid
> >> where each cell is a VTK_VERTEX or you could have a single cell that
> >> is of type VTK_POLY_VERTEX. Then, you can attach PointData (vectors or
> >> scalars, etc.) as normal and read/write *.vtu files.
> >>
> >> Best,
> >> George
> >>
> >> On Thu, Jun 14, 2012 at 5:31 AM, Andrew Parker
> >> <andy.john.parker at googlemail.com> wrote:
> >> > Hi,
> >> >
> >> > Could I ask for a bit of help.  I'd like to visualise particle based
> >> > flows.
> >> >  My requirements are to be able to write(and read) a  vtk style file
> >> > that
> >> > paraview and read and animate.  I would like the file to have scalar
> and
> >> > or
> >> > vectors associated with each particle, there to be a relevant time
> step
> >> > per
> >> > "slot" in the file, and that each time step the particle positions are
> >> > updated and hence move.  I would like an animation to show the
> particles
> >> > moving, as a function of the new positions in the file, and not
> >> > inspecting a
> >> > vector field in the file and integrating to determine a new position.
> >> >
> >> > Any help really appreciated,
> >> >
> >> > Cheers again,
> >> > Andy
> >> >
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> >
> >
> > --
> >
> > __________________________________
> >
> >    Dr Andrew Parker
> >
> >    Em at il:  andrew.parker at cantab.net
> >
> >
>



-- 

__________________________________

   Dr Andrew Parker

   Em at il:  andrew.parker at cantab.net
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