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<tt>Ken and Richardson CFD;<br>
<br>
Mapping data from a 3-D mesh to a 2-D surface that transects the
3-D mesh is very much of interest to me, particularly, with
respect to STL 2-D surface definitions in 3-space. </tt><tt><tt>(My
concern is with unstructured mesh simulations of solid objects.)<br>
<br>
</tt>For what it is worth, here is my experience using the
Richardson CFD *.stl and *.vtk test files. <br>
<br>
</tt>Using ParaView (4.3.1):<br>
<br>
<b>CASE [1].</b><br>
<br>
(1) Load 'scalars.vtk' with all cell & point datum sets<br>
<br>
(2) Load 'sphere.stl' <br>
<br>
(3) Select 'scalars.vtk' and add the PV filter Resample With
Dataset,<br>
<br>
(3.i) On the Change Input Dialog pop-up window, scalars.vtk is
preselected as the input ("This property specifies the dataset from
which to obtain probe values. The data attributes come from this
dataset.")<br>
<br>
(3.ii) I then change the radio button to Source, and select
sphere.stl as source ("This property supplies the dataset whose
geometry will be used in determining positions to probe. The mesh
comes from this dataset.")<br>
<br>
(4) Select the Resample With Dataset filters green Apply button,
Everything appears to function properly. The outcome is the
sphere.STL now has all on the point data from scalars.vtk to select
for display, but on the sphere's surface points all the values are
zero.<br>
<br>
<b>CASE [2]:</b> Substitute scalars.vtk with Clean to Grid filter
output. Same results as Case [1]<br>
<br>
<b>CASE [3]:</b> Substitute sphere.stl with Delaunay 3D filter
output. Same result as Case [1]<br>
<br>
<b>CASE [4]:</b> Case [2] and Case [3] combined. Same result as Case
[1].<br>
<br>
Clearly I am in over my head regarding how to move a datum set from
one mesh to another in ParaView. Maybe it can't be done? Has someone
else been able to do this?<br>
<br>
Samuel W Key<br>
FMA Development, LLC<br>
1005 39th Ave NE<br>
Great Falls, Montana 59404<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 2/5/2016 12:52 PM, Moreland, Kenneth
wrote:<br>
</div>
<blockquote cite="mid:D2DA4996.2C85C%25kmorel@sandia.gov"
type="cite">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<div>
<div>
<div>(Responding back to the group.)</div>
<div><br>
</div>
<div>Well, that's strange. That should work.</div>
<div><br>
</div>
<div>I notice that you originally said your scalars are in a
structured grid, but the top of your data file says it is an
unstructured grid. An unstructured grid can represent
anything, so is there a possibility it does not represent
the solid geometry you think it does? If you put a slice
plane through it, does the slice and the fields on the slice
look correct? Does it help if you run the "Clean to Grid"
filter on the scalars?</div>
<div><br>
</div>
<div>I'm really just guessing at potential problems here. It
would help if you could send some example data that
exemplifies the problem.</div>
<div><br>
</div>
<div>-Ken</div>
<div><br>
</div>
</div>
</div>
<div><br>
</div>
<span id="OLK_SRC_BODY_SECTION">
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<span style="font-weight:bold">From: </span>Richardson CFD
<<a moz-do-not-send="true" href="mailto:garcfd@gmail.com">garcfd@gmail.com</a>><br>
<span style="font-weight:bold">Date: </span>Friday, February
5, 2016 at 11:29 AM<br>
<span style="font-weight:bold">To: </span>Kenneth Moreland
<<a moz-do-not-send="true" href="mailto:kmorel@sandia.gov">kmorel@sandia.gov</a>><br>
<span style="font-weight:bold">Subject: </span>Re: [EXTERNAL]
[Paraview] mapping scalars onto surface geometry<br>
</div>
<div><br>
</div>
<div>
<div>
<div dir="ltr"><br>
Thanks - yes the data-sets definitely overlap. The STL
surface (blue) is well within the scalar flow field
(red). The scalars (in the flow field) are just imported
as a vtk file:<br>
ASCII<br>
DATASET UNSTRUCTURED_GRID<br>
<br>
<img moz-do-not-send="true" alt="Inline image 1"
src="cid:ii_152b2adc8a4c120a" height="349" width="463"><br>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Fri, Feb 5, 2016 at 5:48 PM,
Moreland, Kenneth <span dir="ltr">
<<a moz-do-not-send="true"
href="mailto:kmorel@sandia.gov" target="_blank">kmorel@sandia.gov</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div
style="word-wrap:break-word;color:rgb(0,0,0);font-size:14px;font-family:Calibri,sans-serif">
<div>
<div>
<div>That should work. Is it possible that the
physical space of the two geometries do not
overlap? Go to the information panel and look
at the Bounds for the scalar field and the
surface geometry. The bounds should overlap.
If they do not, then you can use the Transform
filter to move/scale one or both so that they
are arranged in the same space.</div>
<div><br>
</div>
<div>-Ken</div>
<div><br>
</div>
</div>
</div>
<div><br>
</div>
<span>
<div
style="font-family:Calibri;font-size:11pt;text-align:left;color:black;BORDER-BOTTOM:medium
none;BORDER-LEFT:medium
none;PADDING-BOTTOM:0in;PADDING-LEFT:0in;PADDING-RIGHT:0in;BORDER-TOP:#b5c4df
1pt solid;BORDER-RIGHT:medium
none;PADDING-TOP:3pt">
<span style="font-weight:bold">From: </span>ParaView
<<a moz-do-not-send="true"
href="mailto:paraview-bounces@paraview.org"
target="_blank">paraview-bounces@paraview.org</a>>
on behalf of Richardson CFD <<a
moz-do-not-send="true"
href="mailto:garcfd@gmail.com" target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:garcfd@gmail.com">garcfd@gmail.com</a></a>><br>
<span style="font-weight:bold">Date: </span>Friday,
February 5, 2016 at 10:41 AM<br>
<span style="font-weight:bold">To: </span>"<a
moz-do-not-send="true"
href="mailto:paraview@paraview.org"
target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:paraview@paraview.org">paraview@paraview.org</a></a>"
<<a moz-do-not-send="true"
href="mailto:paraview@paraview.org"
target="_blank">paraview@paraview.org</a>><br>
<span style="font-weight:bold">Subject: </span>[EXTERNAL]
[Paraview] mapping scalars onto surface geometry<br>
</div>
<div>
<div class="h5">
<div><br>
</div>
<div>
<div>
<div dir="ltr">How do you map a scalar
field onto a surface geometry (STL file)
please?<br>
<div>
<div>
<div><br>
I have a structured 3d array of
values such as velocity, density,
temperature etc...<br>
</div>
</div>
and I want to map that onto a surface
geometry, such as a motorbike for
example.<br>
<br>
</div>
<div>I have tried the "Resample with
Dataset" method, (input=scalar
field, source=surface geometry) but
I'm just getting a null field (zeros)
for whichever scalar I then select to
display on the surface.<br>
</div>
<div><br>
</div>
Thanks UFO-CFD</div>
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