[vtkusers] How to show a 3D scalar dataset on a polygon?

[AGPX]

Yes, but you have to tessellate the polygons properly... there's some filter that I can use to obtain this?



________________________________
Da: David E DeMarle <dave.demarle at kitware.com>
A: AGPX <agpxnet at yahoo.it>
Cc: Jérôme <jerome.velut at gmail.com>; vtk vtk <vtkusers at vtk.org>
Inviato: Dom 14 marzo 2010, 12:50:41
Oggetto: Re: [vtkusers] How to show a 3D scalar dataset on a polygon?

I think you want to use vtkProbeFilter to sample the field onto the
vertices of the polydata. Then render the output of that filter.

David E DeMarle
Kitware, Inc.
R&D Engineer
28 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-371-3971 x109



On Sun, Mar 14, 2010 at 6:21 AM, AGPX <agpxnet at yahoo.it> wrote:
> Hi,
>
> thanks for reply. What I need is to show the scalar field using colors
> (through a lookup table) on a polygonal surface. If I'm not wrong with
> vtkGlyph3D you cannot achieve this, am I right? Somebody have tried to
> extend vtkOpenGLTexture class to support 3D texture? Any hints on how I can
> do it? Alternatively I can render this polygonal surfaces using OpenGL
> directly.... I can mix vtk rendering with direct OpenGL commands?
>
> Thanks,
>
> - AGPX
>
> ________________________________
> Da: Jérôme <jerome.velut at gmail.com>
> A: AGPX <agpxnet at yahoo.it>
> Cc: vtk vtk <vtkusers at vtk.org>
> Inviato: Dom 14 marzo 2010, 10:55:36
> Oggetto: Re: [vtkusers] How to show a 3D scalar dataset on a polygon?
>
> Hi,
> My understanding is that you have a 3D vector defined at each point of your
> volume. If I am not wrong, you may want to use vtkGlyph3D.
>
> HTH
> Jerome
>
> 2010/3/14 AGPX <agpxnet at yahoo.it>
>>
>> Hi,
>>
>> I have a volume dataset of scalars that represent an electromagnetic
>> field. I need show this field on a set of polygon. This could be solved
>> easily IF vtk support 3D texture, but very sadly 3D textures aren't
>> supported. There's another way to show the field on the polygons?
>>
>> Please help, I'm stucked! Thanks.
>>
>> - AGPX
>>
>>
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