[Paraview] Fwd: Interpolation problem

[Takuya OSHIMA]

Hi Shinya,

If I am not mistaken Gouraud is an interpolation for shading than for
field values. Try crating a Sphere source and changing the
Interpolation selection between Gouraud and Flat, hopefully you'll see
the difference in shading.

Takuya

Takuya OSHIMA, Ph.D.
Faculty of Engineering, Niigata University
8050 Ikarashi-Ninocho, Nishi-ku, Niigata, 950-2181, JAPAN

From: Andy Bauer <andy.bauer at kitware.com>
Subject: Re: [Paraview] Fwd: Interpolation problem
Date: Thu, 14 Oct 2010 11:06:36 -0400

> 2010/10/14 小縣信也 <so0208jp at gmail.com>
> 
>> Hi Andy,
>>
>> Thank you for replying.
>> Do you mean that the rendering image doesn't reflect the result of
>> interpolation ?
>>
> 
> Yes.
> 
> 
>> If so, what is the most common usage?
>> In what situation is the interpolation used ?
>>
> 
> If your grid uses triangles then the image should match the interpolation
> for the typical node/point based interpolation.
> 
> 
> 
>> Shinya
>>
>>
>> 2010/10/13 Andy Bauer <andy.bauer at kitware.com>:
>> > I think this is a rendering issue and not an interpolation issue.  From
>> the
>> > 2d plot you can see that it's properly interpolating the values.  I think
>> > the quadrilateral is getting rendered as 2 triangles in which case the
>> > diagonal values appear to be constant since the 2 end points are at the
>> same
>> > value.
>> >
>> > 2010/10/12 小縣信也 <so0208jp at gmail.com>
>> >>
>> >> Hello
>> >>
>> >> I'm sending  the following  e-mail again ,because nobody answered it.
>> >> Does anyone have information on my problem?
>> >>
>> >> Shinya
>> >>
>> >>
>> >> ---------- Forwarded message ----------
>> >> From: 小縣信也 <so0208jp at gmail.com>
>> >> Date: 2010/10/7
>> >> Subject: Interpolation problem
>> >> To: paraview at paraview.org
>> >>
>> >>
>> >> Hello, paraview users
>> >>
>> >> I draw the file “Sample_inter.vtk” on ParaView. (ref:attached file)
>> >> I chose “Gouraud” in Interpolation option.
>> >> The contor picture doesn’t seem to be interpolated by 4 points.
>> >> However,the graph which is made by PlotOverLine shows the gradation of
>> >> 4 points scalar.
>> >> Why are they different?
>> >> Does anyone know this problem?
>> >> How can I make contour picture interpolated by  Gouraud ?
>> >>
>> >> I look forward to your reply to my inquiry
>> >>
>> >> Shinya Ogata
>> >>
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