[Paraview] hyperstreamline visualization

Thu Dec 18 07:08:49 EST 2008

I'm really sorry, I miss a key on my keyboard, and there was it, the mail
already left...

So, I wanted first pointing out a possible interesting feature: having two
buttons when dealing with plug-ins:

- "select" having the functionality of the current "load" one: selection of
an XML file
- a "load" or "apply" button to confirm the selection of the XML file and
maybe achieving some controls:
                       - is the file empty?
                       - does it start with the <ServerManagerConfiguration>
tag?
                       - and so on... (well, the standard controls that
allow the use of an XML file I guess...)

Then, here is my main question: I'm not sure at all the loading worked
correctly:
Where am I supposed to find the loaded filter to apply it on an example?

I went in the *Filter* tab and I couldn't see it anywhere...

(see attached picture)

I am of course not interest in the vtkCellDerivatives lcass: I know that it
is availabe with the filter "Compute Derivatives".
It is just a test.

Could you point me out where is the mistake?

I have to say that I didn't use any GUI XML, as it is said being "optional"
in the page:
http://www.paraview.org/Wiki/Plugin_HowTo#Enabling_a_filter_in_VTK

In addition, just for information: where does the name displayed in the *
Filter* tab comes from?
Is it the value of the "SourceProxy" tag \"name" attribute?
In this case, are we forced to prepend "vtk" from the vtk class name to
obtain it?
It would indeed mean that we cannot have blank in the name.

Concerning the wiki, I have also few questions.

- First, once I have this working for HyperStreamLine, I guess that it may
interest other users.
Wouldn't it be interesting to have a section in the wiki where users could
drop validated server manager configuration files for VTK classes that could
then be downloaded by others?

- Finally, I found the old page:
http://www.paraview.org/Wiki/ExtendingParaView#Enable_Existing_VTK_Class
more detailed than the new one.
Shouldn't they be merged?

Tell me if I can help on this topic.

Cheers,

Pierre

2008/12/18 Pierre JUILLARD <pierre.juillard at gmail.com>

Hi all!
>
> I had a look on the wiki, and indeed, one can find information at the page
> you pointed me:
> http://www.paraview.org/Wiki/Plugin_HowTo#Enabling_a_filter_in_VTK
> but also at that one:
> http://www.paraview.org/Wiki/ExtendingParaView#Enable_Existing_VTK_Class
>
> Very interesting information are given, however, I think I am missing
> something.
>
> Just to try out, I copy/past the given Server Manager Configuration file in
> a xml, naming it "vtkCellDerivatives.xml".
>
> I loaded it as it is indicated (using the *Plugins Manager*), as shown on
> the following picture.
>
> (By the way, I'm surprised that there is no confirmation of the correct
> loading. It may be intersting to have two buttons:
> - "select" having thefunctionality of the current "load" one: selection of
> an XML file
> - "load" or "apply" confirming the selection of the XL file and may
> achieveing some control:
>
>
>
>
>
> 2008/12/9 David E DeMarle <dave.demarle at kitware.com>
>
> On Tue, Dec 9, 2008 at 9:55 AM, Pierre JUILLARD
>> <pierre.juillard at gmail.com> wrote:
>> >
>> > Hi ParaView user,
>> >
>> >
>> > Having stress tensor in VTK file, I would like to visualize them.
>> >
>> > Different solutions may exist:
>> >
>> >
>> > 1). For instance, evaluate the principal components (vectors) from
>> stress
>> > tensor and use the 'stream tracer' filter to visualize each principal
>> > component individually. However, in the 'Calculator' filter, I see
>> neither
>> > 'extract principal component' function, nor the possibility to interact
>> with
>> > tensor at all: only the access to scalars and vectors is allowed.
>> > Could you confirm me this?
>> >
>> >
>> > 2). Another actually much more interesting way would be to use the
>> > Hyperstreamline method available in the VTK library
>> > (http://www.vtk.org/doc/release/5.2/html/a00565.html). Nonetheless, I
>> don't
>> > see the equivalent filter in ParaView.
>> > Is there a way to 'activate' it simply in ParaView?
>> > Or should an external filter be developped (based on the existing VTK
>> > class)?
>> >
>> >
>> > I thank youfor your help!
>> > Regards
>> >
>> >
>> > Pierre
>> > _______________________________________________
>> > ParaView mailing list
>> > ParaView at paraview.org
>> > http://www.paraview.org/mailman/listinfo/paraview
>> >
>> >
>>
>>
>> I  recommend solution 2.
>> See
>> http://www.paraview.org/Wiki/Plugin_HowTo#Enabling_a_filter_in_VTK
>>
>> --
>> David E DeMarle
>> Kitware, Inc.
>> R&D Engineer
>> 28 Corporate Drive
>> Clifton Park, NY 12065-8662
>> Phone: 518-371-3971 x109
>>
>
>
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