[Paraview] ParaViewWeb, vtk filters python description

Tue Jun 26 10:10:19 EDT 2012

What I'm talking about is a "--batch-file" not a ParaViewWeb plugin.
But never mind, if you really want to use a ParaViewWeb plugin you are
stuck by the fact that your ParaView object in JavaScript will NEVER
have your custom filter definition available. Which is NORMAL, and
that's why you get those errors.

The only way you can overcome that issue is to work directly on the
sever side using ParaViewWeb plugins. Which is what you basically do
now...

But your JavaScript should look like that (based on what you did.)

p = paraview;
var reader = p.OpenDataFile('/home/.../myfile.mhd');
p.loadPlugins();
p.plugins.ImageThreshold.ImageThreshold(reader, 1000,1150);

/// Here is the explanation of how the call is made:
// => p.plugins.${python file name}.${method name in your python
file}( the arguments of your methods )

But once AGAIN, if you start PWServer with the --batch-file argument
and a script that LOAD the ParaView plugin, then you will be able to
do that:

p = paraview;
var reader = p.OpenDataFile('/home/.../myfile.mhd');
p.ImageThreshold({proxy: reader,ThresholdRange:[a,b]})

Here is an example on what that batch-file should look like:

## init.py
import paraview
paraview.simple.LoadPlugin('/home/.../vtkImageThreshold/bin/libImageThresholdSMPlugin.so',False)
paraview.simple.LoadPlugin('/home/.../vtkImageThreshold/bin/libImageThresholdSMPlugin.so',True)

On Tue, Jun 26, 2012 at 9:29 AM, Alex <tuanha_it0306 at yahoo.com> wrote:
> Thank Seb,
>    I'm sorry if I forget one step. But I have always Uncaught TypeError:
> Object #<Paraview> has no method 'ImageThresholdPFE'
> I did as follow:
>
> File ImageThreshold.py
> import paraview
>
> paraview.simple.LoadPlugin('/home/.../vtkImageThreshold/bin/libImageThresholdSMPlugin.so',False)
> paraview.simple.LoadPlugin('/home/.../vtkImageThreshold/bin/libImageThresholdSMPlugin.so',True)
>
> My JavaScript
> $ p = paraview; var reader = p.OpenDataFile('/home/.../myfile.mhd');
> $ p.loadPlugins();
> $ threshold = p.ImageThresholdPFE({Input:reader,
> ThresholdRange:[1000,1150]});
> $ threshold = p.ImageThreshold();
> $ var threshold = p.ImageThresholdPFE({Input:reader,
> ThresholdRange:[1000,1150]});
>
> All the 3 ways have the same error  Uncaught TypeError: Object #<Paraview>
> has no method 'ImageThreshold'
>
>
> In fact, I used your advice with
> def ImageThreshold(proxy,a,b):
> servermanager.ActiveConnection.Modules.filters.ImageThreshold(proxy,ThresholdRange=[a,b])
>
> but each time I called
> $ var threshold = p.ImageThreshold([reader],1000,1150);
>  ParaViewWeb planted and I have to use kill - 9 to escape. Do you have any
> clue?
>  Thank you very much Seb
>
>
> ________________________________
> From: Sebastien Jourdain <sebastien.jourdain at kitware.com>
> To: Alex <tuanha_it0306 at yahoo.com>
> Cc: "paraview at paraview.org" <paraview at paraview.org>
> Sent: Tuesday, June 26, 2012 2:20 PM
>
> Subject: Re: [Paraview] ParaViewWeb, vtk filters python description
>
> Please read that:
>
> http://www.paraview.org/Wiki/ParaViewWeb_Manta_setting
>
> Then forget Manta and do your own "manta-init.py" file that will only
> load your plugin... And that's it... (You can rename the file, just
> make sure you keep the consistency.)
>
> Seb
>
> On Mon, Jun 25, 2012 at 6:52 PM, Alex <tuanha_it0306 at yahoo.com> wrote:
>> I think that is the problem too (plugin is properly loaded for PWServer).
>> But .... which initialization script are you talking about? XML or .py?
>>
>>
>> ________________________________
>> From: Sebastien Jourdain <sebastien.jourdain at kitware.com>
>> To: Alex <tuanha_it0306 at yahoo.com>
>> Cc: "paraview at paraview.org" <paraview at paraview.org>
>> Sent: Tuesday, June 26, 2012 12:48 AM
>>
>> Subject: Re: [Paraview] ParaViewWeb, vtk filters python description
>>
>> I don't believe the plugin is properly loaded for PWServer... Did you
>> write the proper initialization script ?
>>
>> On Mon, Jun 25, 2012 at 6:36 PM, Alex <tuanha_it0306 at yahoo.com> wrote:
>>> In fact,
>>>    I call directly MyImageThreshold with
>>> threshold=paraview.MyImageThreshold({Input:reader, ...}) and I receive
>>> Uncaught TypeError : Object #<ParaView> has no method 'MyImageThreshold'
>>>    when I use threshold = paravie.Threshold(....) (origin threshold of
>>> ParaView) then it works. That why I think that we have to use some kind
>>> of
>>> descriptor?
>>>
>>>    Alex
>>>
>>> ________________________________
>>> From: Alex <tuanha_it0306 at yahoo.com>
>>> To: Sebastien Jourdain <sebastien.jourdain at kitware.com>
>>> Cc: "paraview at paraview.org" <paraview at paraview.org>
>>> Sent: Tuesday, June 26, 2012 12:24 AM
>>>
>>> Subject: Re: [Paraview] ParaViewWeb, vtk filters python description
>>>
>>> Thank you Seb,
>>>    You mean the ParaView plugin at startup? Indeed, I copied the
>>> dynamique
>>> library .so in /install/lib/paraview-3.14/plugins and the plugin is
>>> loaded
>>> automatically into ParaView. It is then usable immediately in Python
>>> Shell.
>>>    However, I doubt that I can use the plugin directly in ParaViewWeb
>>> without loading it.
>>>    For exemple, I have a MyImageThresholdSMPlugin.so, also the plugin's
>>> name
>>> is MyImageThreshold. I called it sucessfully in Python Shell directly
>>> with
>>> reader2=MyImageThreshold(reader,ThresholdRange=[300,600]); (the values
>>> are
>>> given for exemple).
>>>    In ParaViewWeb, can I use it directly by calling var
>>> reader2=paraview.MyImageThreshold({Input:reader,
>>> ThresholdRange:[300,600]});
>>> ?
>>>    In your previous reply, I have to load a Plugin by LoadPlugin command
>>> from simple.py. And then define a function that call the
>>> servermanager.Activeconnection.Modules.filters.MyImageThreshold(proxy) I
>>> wonder if they are the same thing? That why I ask if we have to write a
>>> MyImageThreshold.py so that our plugin is usable in ParaViewWeb.
>>>
>>>    Alex
>>>
>>> ________________________________
>>> From: Sebastien Jourdain <sebastien.jourdain at kitware.com>
>>> To: Alex <tuanha_it0306 at yahoo.com>
>>> Cc: "paraview at paraview.org" <paraview at paraview.org>
>>> Sent: Tuesday, June 26, 2012 12:03 AM
>>> Subject: Re: [Paraview] ParaViewWeb, vtk filters python description
>>>
>>> If you managed to load your plugin (the C++ ParaView one) at startup,
>>> then you will be able to use your filter as any other filter in
>>> ParaViewWeb without using any ParaViewWeb plugin. Otherwise, the
>>> python file that you are missing is in fact an XML file that list the
>>> properties for each filters and sources inside ParaView.
>>>
>>> PARAVIEW_src/ParaViewCore/ServerImplementation/resources/filter.xml
>>>
>>> The labels without space are used as filter name and properties for
>>> creating and controlling those filters...
>>>
>>> Otherwise inside your ParaViewWeb plugin, you can provide a dictionary
>>> as argument and just loop through its entry and set them in python.
>>>
>>> Seb
>>>
>>> On Mon, Jun 25, 2012 at 5:47 PM, Alex <tuanha_it0306 at yahoo.com> wrote:
>>>> Hi seb, thank you for your quick reply.
>>>> I found that I can use vtk Filter like Threshold, Clip, etc. in
>>>> ParaViewWeb
>>>> by enter the arguments like I cited in my email. Like threshold =
>>>> paraview.Threshold({Input:proxy,ThresholdRange:[300,600]}).
>>>> So I think there are perhaps some files like pwsimple.py that describe
>>>> how
>>>> can ParaViewWeb can use a Plugin. I search for all the .py file in
>>>> ParaView
>>>> and I can't find something like that.
>>>> I did succeed in doing a ParaViewWeb plugin.
>>>> I used your advice to define something as following :
>>>> def SimpleImageThreshold(proxy)
>>>>
>>>>
>>>> servermanager.Activeconnection.Modules.filter.SimpleImageThreshold(proxy)
>>>>
>>>> Now if I want my plugin to take ThresholdRange=[300,600] as input like
>>>> the
>>>> original Threshold of ParaView, is that possible?
>>>> If yes, how can we define this?
>>>> Thank you very much indeed
>>>>
>>>>
>>>>
>>>> ________________________________
>>>> From: Sebastien Jourdain <sebastien.jourdain at kitware.com>
>>>> To: Alex <tuanha_it0306 at yahoo.com>
>>>> Cc: "paraview at paraview.org" <paraview at paraview.org>
>>>> Sent: Monday, June 25, 2012 11:08 PM
>>>> Subject: Re: [Paraview] ParaViewWeb, vtk filters python description
>>>>
>>>> I'm not sure I understand what you mean by "Where is the python file
>>>> which describes the way of using vtk Filters in ParaViewWeb?"
>>>>
>>>> The one that is imported by default is the pwsimple.py which is an
>>>> extension of the simple.py of regular ParaView.
>>>>
>>>> But having said that, you can't easily mix VTK filter and ParaView
>>>> proxy together, unless you just want to do some data processing
>>>> without rendering.
>>>> But as I remember, you did a ParaView plugin for that, so normally,
>>>> once loaded you should be able to use it.
>>>>
>>>> Did you try to load that plugin at startup with the extra argument of
>>>> PWServer ?
>>>>
>>>> Seb
>>>>
>>>> On Mon, Jun 25, 2012 at 4:25 PM, Alex <tuanha_it0306 at yahoo.com> wrote:
>>>>> Hi everybody,
>>>>>    Well, I found that using vtk Filter (Threshold, Clip, etc.) is
>>>>> simple
>>>>> within ParaViewWeb, we have a list of filters so that we can use the
>>>>> filters
>>>>> @ http://paraview.org/Wiki/ParaView/Users_Guide/List_of_filters
>>>>>    We can use "threshold =
>>>>> paraview.Threshold({Input:proxy,ThresholdRange:[300,600]})" to
>>>>> applicate
>>>>> a
>>>>> threshold between 300 and 600 for an image.
>>>>>    So, my question is : where can I find the python script .py which
>>>>> describes the way of using vtk Filters in ParaViewWeb?
>>>>>
>>>>>    If there isn't any file python script like that, how can we define a
>>>>> function that take in value as described above? How can we tell the
>>>>> ParaViewWeb to take in different type of variable?
>>>>>    I mean : def ImageThreshold(proxy,ThresholdRange......) or something
>>>>> like
>>>>> that?
>>>>>
>>>>>    Thank you very much for your reply.
>>>>>    Good day everybody :)
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> Powered by www.kitware.com
>>>>>
>>>>> Visit other Kitware open-source projects at
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>>>>>
>>>>> Please keep messages on-topic and check the ParaView Wiki at:
>>>>> http://paraview.org/Wiki/ParaView
>>>>>
>>>>> Follow this link to subscribe/unsubscribe:
>>>>> http://www.paraview.org/mailman/listinfo/paraview
>>>>>
>>>>
>>>>
>>>
>>>
>>>
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>>
>>
>
>