[vtkusers] Color actor based on scalars of points on mesh (not vertices)

Thu Feb 16 10:31:24 EST 2017

VTK doesn't support arbitrarily placed values within cells as a first class
concept.

So I would use two meshes: one containing just the extra points the other
with for the usual mesh.

Take a look at our Gauss points implementation. Here we store the extra
points in the field data and have dedicated filters that work with and
eventually extract them onto a separate mesh for display.

David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909 <(518)%20881-4909>

On Thu, Feb 16, 2017 at 10:23 AM, Bill Lorensen <bill.lorensen at gmail.com>
wrote:

> Can you describe what you expect to see?
>
> On Feb 16, 2017 10:05 AM, "Tharun" <tharun160190 at gmail.com> wrote:
>
>> Thanks for the heads up.
>>
>> But i have  0 ~ many points in each triangle (cell) not just one and a
>> scalar is associated with each point.
>>
>> Really appreciate the follow up.
>>
>> Regards,
>> P Tharun Kumar
>>
>> On Thu, Feb 16, 2017 at 11:50 PM, Cory Quammen-2 [via VTK] <[hidden
>> email] <http:///user/SendEmail.jtp?type=node&node=5742209&i=0>> wrote:
>>
>>> I see, thanks for the explanation. In VTK, we call that kind of data
>>> cell-associated data, or just cell data.
>>>
>>> In the vtkMapper you use, you'll want to call
>>>
>>> mapper->SetScalarModeToUseCellData();
>>>
>>> It may be helpful to consult this example:
>>> http://www.vtk.org/Wiki/VTK/Examples/Cxx/Visualization/Assig
>>> nColorsFromLUT
>>>
>>> - Cory
>>>
>>> On Thu, Feb 16, 2017 at 9:40 AM, Tharun <[hidden email]
>>> <http:///user/SendEmail.jtp?type=node&node=5742208&i=0>> wrote:
>>>
>>> > sorry for not being clear.
>>> >
>>> > The polydata consists of triangles. I mean those points are inside
>>> triangles
>>> > of mesh not the vertices of triangles.
>>> >
>>> > Hope I am clear.
>>> >
>>> > Regards,
>>> > P Tharun Kumar
>>> >
>>> > On Thu, Feb 16, 2017 at 11:04 PM, Cory Quammen-2 [via VTK] <[hidden
>>> email]>
>>> > wrote:
>>>
>>> >>
>>> >> Okay, I'm curious. What is the difference between points on the mesh
>>> >> and vertices?
>>> >>
>>> >> On Wed, Feb 15, 2017 at 9:28 PM, Tharun <[hidden email]> wrote:
>>> >>
>>> >> > Thank you for the prompt reply.
>>> >> >
>>> >> > Unfortunately no. I have scalar values associated with points(not
>>> >> > vertices)
>>> >> > on the mesh. Where as in your example, color or scalar value is
>>> >> > associated
>>> >> > with vertices.
>>> >> >
>>> >> >
>>> >> >
>>> >> > --
>>> >> > View this message in context:
>>> >> > http://vtk.1045678.n5.nabble.com/Color-actor-based-on-scalar
>>> s-of-points-on-mesh-not-vertices-tp5742197p5742199.html
>>> >> > Sent from the VTK - Users mailing list archive at Nabble.com.
>>> >> > _______________________________________________
>>> >>
>>> >> > Powered by www.kitware.com
>>> >> >
>>> >> > Visit other Kitware open-source projects at
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>>> >> >
>>> >> > Please keep messages on-topic and check the VTK FAQ at:
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>>> >
>>> >
>>> >
>>> > --
>>> > Cory Quammen
>>> > Staff R&D Engineer
>>> > Kitware, Inc.
>>> > _______________________________________________
>>> > Powered by www.kitware.com
>>> >
>>> > Visit other Kitware open-source projects at
>>> > http://www.kitware.com/opensource/opensource.html
>>> >
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>>> s-of-points-on-mesh-not-vertices-tp5742197p5742205.html
>>> > To unsubscribe from Color actor based on scalars of points on mesh
>>> (not
>>> > vertices), click here.
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>>> >
>>> >
>>> > ________________________________
>>> > View this message in context: Re: Color actor based on scalars of
>>> points on
>>> > mesh (not vertices)
>>> >
>>> > Sent from the VTK - Users mailing list archive at Nabble.com.
>>>
>>> >
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>>> >
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>>
>>
>> --
>> Cory Quammen
>> Staff R&D Engineer
>> Kitware, Inc.
>> _______________________________________________
>> Powered by 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 VTK FAQ at:
>> http://www.vtk.org/Wiki/VTK_FAQ
>>
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>>
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>>
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>> ------------------------------
>> View this message in context: Re: Color actor based on scalars of points
>> on mesh (not vertices)
>> <http://vtk.1045678.n5.nabble.com/Color-actor-based-on-scalars-of-points-on-mesh-not-vertices-tp5742197p5742209.html>
>> Sent from the VTK - Users mailing list archive
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>>
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
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>>
>> Please keep messages on-topic and check the VTK FAQ at:
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>>
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>>
> _______________________________________________
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>
> Visit other Kitware open-source projects at http://www.kitware.com/opensou
> rce/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
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