[Paraview] Unstructured Grids

[Moreland, Kenneth]

I'm not sure what you mean by extending to 2D and 3D.  Point coordinates are
always given in 3-space.

-Ken


On 9/26/08 2:50 AM, "christopher mccabe" <mccabec67 at hotmail.com> wrote:

> Thanks Kenneth. I hadn't inserted the vertices section, but now I have and it
> works.
>
> But how do I extend to 2D and 3D?  I expect the points and point data sections
> to remain the same, but expect the vertices section to change.
>
> Chris
>
>
>
>> From: kmorel at sandia.gov
>> To: mccabec67 at hotmail.com; paraview at paraview.org
>> Date: Wed, 24 Sep 2008 09:37:47 -0600
>> Subject: Re: [Paraview] Unstructured Grids
>>
>> That is a pretty open ended question. Unstructured grids are defined by an
>> array of point coordinates and a separate array of cell topologies. In your
>> case, the list of points will simply correspond to each particle, and each
>> cell will be a 0D cell (a vertex) that points to a single point. There are
>> actually two types of unstructured data supported, poly data and
>> unstructured grid. All things being equal, I would probably use the poly
>> data type because you won't have to identify each cell type.
>>
>> ParaView supports multiple file formats for this type of data. One you can
>> use is the legacy data format. It's not an optimal file format, but it's
>> easy to make these files and the documentation is readily available from the
>> VTK User's Guide and the ParaView wiki
>> ((http://www.paraview.org/Wiki/images/5/51/VTK-File-Formats.pdf). This
>> format does not support time natively, but you can write out a sequence of
>> files with incremental numbering, and ParaView will read that as a time
>> series. The files could look something like the following (with the <..>
>> replaced with an appropriate value).
>>
>> # vtk DataFile Version 2.0
>> <A descriptive comment>
>> ASCII
>>
>> DATASET POLYDATA
>> POINTS <num_particles> double
>> <P0x> <P0y> <P0z>
>> <P1x> <P1y> <P1z>
>> ...
>> <Pn-1x> <Pn-1y> <Pn-1z>
>>
>> VERTICES <num_particles> <2*num_particles>
>> 1 0
>> 1 1
>> ...
>> 1 n-1
>>
>> POINT_DATA <num_particles>
>> SCALARS <field_name> double 1
>> LOOKUP_TABLE default
>> S0 S1 ... Sn-1
>>
>> -Ken
>>
>>
>> On 9/24/08 3:18 AM, "christopher mccabe" <mccabec67 at hotmail.com> wrote:
>>
>>>
>>>
>>> Hi
>>>
>>> I am new to using Paraview and would like some assistance if possible. I am
>>> researching particle dynamics and need to create files for unstructured
>>> grids.
>>> For the moment as I have just started all I have are particle locations, but
>>> I
>>> will later require several physcial variables for view.
>>>
>>> So I have a problem in which X number of particles are initially static and
>>> after an initial shock the particles dissipate. I would like to view the
>>> simulation of this by a Paraview animation of the particle locations
>>> recorded
>>> at fixed time intervals.
>>>
>>> What do I need to write in the vtk file for this , and why?
>>>
>>> I am using Paraview 3.2.2
>>>
>>> Thanks in advance
>>>
>>> Chris
>>>
>>>
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>>
>>
>> **** Kenneth Moreland
>> *** Sandia National Laboratories
>> ***********
>> *** *** *** email: kmorel at sandia.gov
>> ** *** ** phone: (505) 844-8919
>> *** fax: (505) 845-0833
>>
>>
>>
>
>
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   ****      Kenneth Moreland
    ***      Sandia National Laboratories
***********
*** *** ***  email: kmorel at sandia.gov
**  ***  **  phone: (505) 844-8919
    ***      fax:   (505) 845-0833