[Paraview] [EXTERNAL] why when contouring by density does a color plot of density show more than one color?

[David E DeMarle]

Check on the advanced properties. Pass through scalars used to be an option.
On Nov 19, 2013 10:26 AM, "Cook, Rich" <cook47 at llnl.gov> wrote:

>  I disagree -- it seems to me that it would be very good to have the
> correct color applied to the isosurface using the color map for the
> variable being used.  This can provide information in a scene that is
> relevant and important.  Having to manually choose a "constant color" does
> not make sense to me.  Should it be purple?  Grey?  Arbitrary and
> misleading.
> -- Rich
>
>  On Nov 19, 2013, at 8:07 AM, "Scott, W Alan" <wascott at sandia.gov>
>  wrote:
>
>   Ken/Rich,
>  This is actually expected behavior that I have noticed before.  If we
> contoured on a variable, that variable is now a constant for this surface.
> Thus, it is useless.  I don’t know if we still should pass it on, but we
> don’t.
>
>  Alan
>
>   *From:* Moreland, Kenneth
> *Sent:* Monday, November 18, 2013 6:40 PM
> *To:* Cook, Rich
> *Cc:* Scott, W Alan; paraview at paraview.org
> *Subject:* Re: [Paraview] [EXTERNAL] why when contouring by density does
> a color plot of density show more than one color?
>
>  I believe Alan is right. The cell to point operation performs something
> of a low pass filtering of the data, meaning that extrema get smoothed out.
> It is entirely possible that is happening here.
>
>   It is strange that you cannot color by the point density. I would
> expect that to be output by the filter.
>
>  -Ken
>
>  Sent from my iPad so blame autocorrect.
>
>
> On Nov 18, 2013, at 6:03 PM, "Cook, Rich" <cook47 at llnl.gov> wrote:
>
>  I did notice that.  It does not allow me to color by point density.  I
> don't think the values really vary by that much near the isosurface, but I
> might be wrong.
>
>
>   On Nov 18, 2013, at 4:58 PM, "Scott, W Alan" <wascott at sandia.gov> wrote:
>
>
>   Rich,
>   The vast majority of the ParaView team is crazy busy at SC.  I.e. if
> you don’t get an answer by next week, ping again.
>
>   OK, thinking out loud here – you are contouring by the density at the
> points (nodes), but coloring by a subtly different variable – density at
> the cells (elements).  Since you should have it available (coming out of
> the cell to point filter), how about coloring by point density?  (You can
> tell by the cute cube in front of the density variable – points look like
> ... um ... points.)  That’s the only thing I can think of...
>
>   Alan
>
>    *From:* paraview-bounces at paraview.org [mailto:paraview-
> bounces at paraview.org] *On Behalf Of *Cook, Rich
> *Sent:* Monday, November 18, 2013 5:52 PM
> *To:* paraview at paraview.org
> *Subject:* [EXTERNAL] [Paraview] why when contouring by density does a
> color plot of density show more than one color?
>
>   the attached is an image I made by creating a contour of the density
> variable resulting from the CellDatatoPointData filter on some Miranda
> data.  I colored by density.  Shouldn't it all be one color?
>
>   <image001.jpg>
>    --
>    ✐Richard Cook
>    ✇ Lawrence Livermore National Laboratory
>    Bldg-453 Rm-4024, Mail Stop L-557
>    7000 East Avenue,  Livermore, CA, 94550, USA
>    ☎ (office) (925) 423-9605
>    ☎ (fax) (925) 423-6961
>    ---
>    Information Management & Graphics Grp., Services & Development Div.,
> Integrated Computing & Communications Dept.
>    (opinions expressed herein are mine and not those of LLNL)
>
>
>
>
>
>   --
>   ✐Richard Cook
>   ✇ Lawrence Livermore National Laboratory
>   Bldg-453 Rm-4024, Mail Stop L-557
>   7000 East Avenue,  Livermore, CA, 94550, USA
>   ☎ (office) (925) 423-9605
>   ☎ (fax) (925) 423-6961
>   ---
>   Information Management & Graphics Grp., Services & Development Div.,
> Integrated Computing & Communications Dept.
>   (opinions expressed herein are mine and not those of LLNL)
>
>
>
>
>
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>  --
> ✐Richard Cook
> ✇ Lawrence Livermore National Laboratory
> Bldg-453 Rm-4024, Mail Stop L-557
> 7000 East Avenue,  Livermore, CA, 94550, USA
> ☎ (office) (925) 423-9605
> ☎ (fax) (925) 423-6961
> ---
> Information Management & Graphics Grp., Services & Development Div.,
> Integrated Computing & Communications Dept.
> (opinions expressed herein are mine and not those of LLNL)
>
>
>
>
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