Hi, Moreland
Thanks for your reply. Maybe i have confused you people.
Now the question is: how do I make a grid invisible to the user using
code style not the "eyeball" in the pipeline browser? Or how can i hide the
gird using code style?
Thanks very much.
Regards,
zhigao
-----Original Message-----
From: Moreland, Kenneth [mailto:[email protected]]
Sent: Wed 4/1/2009 10:26 PM
To: #CHENG ZHIGAO#; [email protected]
Subject: Re: [Paraview] Dataset name in a MultiBlock dataset and display of
unstructured grid
I don't know what the problem is with the reader reading one block at a time so
long as only the data for a given block is read in at one time. This is not
all that different than iteratively reading the data for each time step during
an animation, and that is what every reader in ParaView that supports time does.
Still, if you don't like that and you already have a reader and extract filter
that are working to your satisfaction, my approach would probably be to write a
third component that internally uses the reader and filter to perform the
operation in one step. In its constructor it would create the reader and
filter and hook them up. It would forward all its ivars (like filename and
selected block) to the internal reader and filter. In the RequestData call it
would call Update on the internal filter and then shallow copy the internal
filter's output to its own output. If you are careful, the pipeline update
mechanism will prevent the internal reader from re-executing unnecessarily.
-Ken
On 3/31/09 8:26 PM, "#CHENG ZHIGAO#" <[email protected]> wrote:
Hi, Ken
Thanks for your reply.
Yes, i am using my own reader. Currently all the blocks are constructed
in the reader. And all the blocks are display in the view after pressing the
Apply button. But the user would only expect to see one block each time. If i
combine reader and filter together, i would have to open the data several times
to see all different blocks(they need to compare with each other) which is not
the way i want. Currently i have two options. Option one is that: reader stores
all the data and subsequent filter retrieves block by block and construct the
mesh accordingly. Option Two: The reader stores all data and constructed all
the meshes but make them invisible to the user. Subsequent filter will retrieve
block by block and display them.
But neither way i do not know how to do it? Or it has the third or even
more options?
Regards,
zhigao
-----Original Message-----
From: Moreland, Kenneth [mailto:[email protected]]
Sent: Tue 3/31/2009 8:28 PM
To: #CHENG ZHIGAO#; [email protected]
Subject: Re: [Paraview] Dataset name in a MultiBlock dataset and display of
unstructured grid
Zhigao,
Are you creating your own reader? If so, why not combine the actual reader and
subsequent filter into a single "meta" reader class. That way ParaView can
read in the data and apply the block extraction all in one step. It should
make the user interface easier to use and gets around the problem in question.
-Ken
On 3/31/09 2:17 AM, "#CHENG ZHIGAO#" <[email protected]> wrote:
Thanks, Paul...The name part has been done according to your suggestion...
The other question still remains:
The scenario is that: I have a reader which reads a multiple block data.
Each of the data block is a unstructured grid. After i load the data and press
the Apply button. The meshes are displayed in the view window which is not what
i want. I just want the reader to store the data and a subsequent filter will
be used to retrieve the data block by block and display them. The grid needs to
be constructed in the reader since all corresponding functions are in the
reader. The filter knows nothing about these. Another option is "eyeball" icon
in the pipeline browser, is it possible to "turn off" by default?
What should I do? Setting the block name is for the filter to display the
options that the user can choose. Is this the right way to do it?
Thanks in advance.
Regards,
zhigao
-----Original Message-----
From: Paul Edwards [mailto:[email protected]]
Sent: Mon 3/30/2009 4:08 PM
To: #CHENG ZHIGAO#
Cc: [email protected]
Subject: Re: [Paraview] Dataset name in a MultiBlock dataset and display of
unstructured grid
Hi Zhigao,
If you are writing a reader or filter that returns a multi-block data set
you can name a block with the following:
MULTI_BLOCK_DATA_SET->GetMetaData(BLOCK_NUMBER)->Set(vtkCompositeDataSet::NAME(),
"PUT_NAME_HERE");
If you are just using ParaView you can use the "Extract Block" filter and
select the blocks you are interested in. In the pipeline browser you can
change the name from "ExtractBlock1" to something more meaningful.
Regards,
Paul
2009/3/29 #CHENG ZHIGAO# <[email protected]>
>
> hey,
>
> As a beginner in paraview, please forgive my silly questions. :<)
>
> I have a multiblock datasets which contains several unstructured grid.
> If there a way to set a different name for each block? And What should i do
> if i do not want to display some of the datasets while displaying the
> others? Or how can I hidden them all if i can not display parts of it?
>
> Thanks for your help in advance.
>
> Regards,
> zhigao
>
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**** Kenneth Moreland
*** Sandia National Laboratories
***********
*** *** *** email: [email protected]
** *** ** phone: (505) 844-8919
*** web: http://www.cs.unm.edu/~kmorel
**** Kenneth Moreland
*** Sandia National Laboratories
***********
*** *** *** email: [email protected]
** *** ** phone: (505) 844-8919
*** web: http://www.cs.unm.edu/~kmorel
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