[Paraview] Scaling cylinder glyph's radius and height individually
Ahmad .
super_achie at hotmail.com
Thu Feb 1 13:12:21 EST 2018
Sorry about that Cory; will keep this in the mailing list.
I have tried to implement your suggestion, and now I have generated a plugin file "libvtkPVGlyphFilterP.so".
Please find the files I used to create this plugin in the attachment.
What I did after compiling the plugin:
1. Try to use the new class I made, like such: `session_manager_->NewProxy("filters", "GlyphP")));`
where GlyphP is what I called my custom glyph filter (see the xml file in the attachment).
2. Compile my application against "libvtkPVGlyphFilterP.so".
3. Run my application and get the following error:
ERROR: In /home/ahmad/paraview/ParaViewCore/ServerImplementation/Core/vtkSIProxyDefinitionManager.cxx, line 526
vtkSIProxyDefinitionManager (0x294d320): No proxy that matches: group=filters and proxy=GlyphP were found.
I feel like I am missing an important step, which has to do with the XML file, but I don't know how.
In the Plugin Wiki of ParaView the instructions I find after compiling are: Then using cmake and a build system, one can build a plugin for this new filter. Once this plugin is loaded the filter will appear under the "Alphabetical" list in the Filters menu.
There are no instructions on how to use the new class in a C++ pipeline...
Any pointers on this?
Best,
Ahmad
________________________________
Van: Cory Quammen <cory.quammen at kitware.com>
Verzonden: vrijdag 19 januari 2018 16:59
Aan: Ahmad .; ParaView
Onderwerp: Re: [Paraview] Scaling cylinder glyph's radius and height individually
Ahmad,
Please keep replies on the mailing list. Responses are inlined.
On Tue, Jan 16, 2018 at 9:25 AM, Ahmad . <super_achie at hotmail.com<mailto:super_achie at hotmail.com>> wrote:
Hi Cory,
Thanks for your reply.
I am trying to implement your suggestion of extending the vtkGlyph3D with this additional "scaling by normals".
The idea seems quite straightforward. I was just wondering how to incorporate this new class in my C++ pipeline.
Currently I create the glyph, and set its properties, like this:
vtkSmartPointer<vtkSMSourceProxy> glyph;
glyph.TakeReference(vtkSMSourceProxy::SafeDownCast(
session_manager_->NewProxy("filters", "Glyph")));
controller_->PreInitializeProxy(glyph);
vtkSMPropertyHelper(glyph, "Input").Set(producer);
vtkSMPropertyHelper(glyph, "Source").Set(GetCylinderSource(glyph));
vtkSMPropertyHelper(glyph, "ScaleMode", true).Set(0);
vtkSMPropertyHelper(glyph, "ScaleFactor", true).Set(1.0);
vtkSMPropertyHelper(glyph, "GlyphMode", true).Set(0);
As you can see I am not directly working with vtkGlyph3D or vtkPVGlyphFilter classes, but I am using the vtkSMPropertyHelper to take care of the boilerplate code.
Right. Unfortunately, implementing my suggestion would require creating a subclass of vtkPVGlyphFilter and importing that with a ParaView plugin. See the ParaView Howto on how to add a filter to ParaView.
After I created a new class that has this extra scaling option, how would I go about using this in such a pipeline? Do I need to 'register' my "ModifiedGlyph" to the filter proxies to be able to do something like `NewProxy("filters", "ModifiedGlyph")`?
Yes, that should do it. Your modified glyph class will be available once you've imported the ParaView plugin mentioned above.
A quick question about setting the active normals. Is there an existing way to do this, or would I need to do this myself? I would like to do this the same way one would set the "Scalars":
vtkSMPropertyHelper(glyph, "Normals")
.SetInputArrayToProcess(vtkDataObject::POINT, "ScalingArray");
I think that should work.
Best,
Cory
Looking forward to your reply.
Best,
Ahmad
________________________________
Van: Cory Quammen <cory.quammen at kitware.com<mailto:cory.quammen at kitware.com>>
Verzonden: dinsdag 9 januari 2018 15:30
Aan: Ahmad .
CC: paraview at paraview.org<mailto:paraview at paraview.org>
Onderwerp: Re: [Paraview] Scaling cylinder glyph's radius and height individually
Hi Ahmad,
Alas, reading the code of vtkGlyph3D, you cannot orient by a vector
array different from the vector array used to do the scaling using the
functionality in ParaView. You would have to modify either
vtkPVGlyphFilter or its parent class vtkGlyph3D, to do this, and
expose the new VTK class through a ParaView plugin [1]. A simple
modification would be to add a ScaleMode, say VTK_SCALE_BY_NORMAL, to
vtkGlyph3D, and then set the active normals in your data set to the
vector by which you wish to scale. Then the "vectors" property could
control the orientation and the active normals would control the
scale. That's kind of kludgey, but it would be a fairly fast
modification to make.
HTH,
Cory
[1] https://www.paraview.org/Wiki/ParaView/Plugin_HowTo
ParaView/Plugin HowTo - KitwarePublic<https://www.paraview.org/Wiki/ParaView/Plugin_HowTo>
www.paraview.org<http://www.paraview.org>
Introduction. ParaView comes with plethora of functionality bundled in: several readers, multitude of filters, quite a few different types of views etc.
On Tue, Jan 9, 2018 at 7:43 AM, Ahmad . <super_achie at hotmail.com<mailto:super_achie at hotmail.com>> wrote:
> Just want to add that a programmatic (C++) solution is preferred rather than
> using the GUI
>
>
> I have a C++ pipeline where I can set the properties of the cylinder glyph
> with vtkSMPropertyHelper.
>
> I have looked in filters.xml under vtkPVGlyphFilter source proxy (file
> located in
> <paraview_home>/ParaViewCore/ServerManager/SMApplication/Resources) to see
> what my options are, but there is only one "SetInputArrayToProcess" that
> takes a vector attribute as input; nothing about a vector specifically for
> orientation..
>
> Suggestions on how to handle this issue, are very welcome; other approaches
> than mine as well!
>
> ________________________________
> Van: Ahmad . <super_achie at hotmail.com<mailto:super_achie at hotmail.com>>
> Verzonden: maandag 8 januari 2018 20:52
> Aan: paraview at paraview.org<mailto:paraview at paraview.org>
> Onderwerp: Re: Scaling cylinder glyph's radius and height individually
>
>
> Following up on my own question, I found out that if I scale by "Vector
> Components" it is possible to change the length of the cylinders with the
> second vector index, and the radius with the first and third. I need to
> rearrange my attribute data as such: [radius_x, length, radius_z]. If I keep
> radius_x == radius_z, then the cylinder will not deform, and the cross
> section stays a perfect circle. See the image in the attachment please.
>
>
> BUT the problem here is that "vector components" also affects the
> orientation of my cylindrical glyphs. I can turn this off in the properties
> menu, but I need to orient my cylinders based on another vector attribute
> data...
>
>
> I feel I'm getting somewhere, but if someone could give me an idea on how to
> now orient my glyphs with another vector data than the one I use now for
> scaling, that would be much appreciated!
>
>
> Best,
> Ahmad
>
> ________________________________
> Van: Ahmad . <super_achie at hotmail.com<mailto:super_achie at hotmail.com>>
> Verzonden: maandag 8 januari 2018 18:01
> Aan: paraview at paraview.org<mailto:paraview at paraview.org>
> Onderwerp: Scaling cylinder glyph's radius and height individually
>
>
> Dear community,
>
>
> When I try to scale cylindrical glyph objects by a 'Scalar', it scales both
> the radius and height of the glyphs.
>
> Is there a way to scale the radius by a Scalar1, and the height be a
> Scalar2?
>
>
> I have an unstructured grid, and for each point I want to create a cylinder
> that can have an arbitrary radius and height.
>
> I thought Glyphs would be the way to go, but I'm kind of stuck with this
> issue.
>
>
> Any help is much appreciated; or if you can recommend a different way to
> achieve the above-mentioned please let me know!
>
>
> Best,
>
> Ahmad
>
>
> _______________________________________________
> Powered by www.kitware.com<http://www.kitware.com>
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the ParaView Wiki at:
> http://paraview.org/Wiki/ParaView
ParaView - KitwarePublic<http://paraview.org/Wiki/ParaView>
paraview.org<http://paraview.org>
ParaView is an open-source, multi-platform application designed to visualize data sets of varying sizes from small to very large. The goals of the ParaView project ...
>
> Search the list archives at: http://markmail.org/search/?q=ParaView
>
> Follow this link to subscribe/unsubscribe:
> https://paraview.org/mailman/listinfo/paraview
ParaView Info Page<https://paraview.org/mailman/listinfo/paraview>
paraview.org<http://paraview.org>
To see the collection of prior postings to the list, visit the ParaView Archives. Using ParaView: To post a message to all the list members, send ...
>
--
Cory Quammen
Staff R&D Engineer
Kitware, Inc.
--
Cory Quammen
Staff R&D Engineer
Kitware, Inc.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://paraview.org/pipermail/paraview/attachments/20180201/80ebcd52/attachment.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: vtkPVGlyphFilterP.tar.gz
Type: application/gzip
Size: 17529 bytes
Desc: vtkPVGlyphFilterP.tar.gz
URL: <https://paraview.org/pipermail/paraview/attachments/20180201/80ebcd52/attachment.bin>
More information about the ParaView
mailing list