<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (filtered medium)">
<!--[if !mso]>
<style>
v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style>
<![endif]--><o:SmartTagType
namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="country-region"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="City"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="place"/>
<!--[if !mso]>
<style>
st1\:*{behavior:url(#default#ieooui) }
</style>
<![endif]-->
<style>
<!--
/* Font Definitions */
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";
color:black;}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:blue;
text-decoration:underline;}
pre
{margin:0in;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";
color:black;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Courier New";
color:maroon;
font-weight:normal;
font-style:normal;
text-decoration:none none;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;}
div.Section1
{page:Section1;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body bgcolor=white lang=EN-US link=blue vlink=blue>
<div class=Section1>
<p class=MsoNormal><font size=2 color=maroon face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:maroon'>Uh, sure.
Sounds good. D3 clearly needs some updating, so hack away.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=maroon face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:maroon'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=maroon face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:maroon'>-Ken<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=maroon face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:maroon'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=maroon face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:maroon'>BTW, D3 will
find duplicate points and merge them together. If you have global point ids,
that can make the process faster and more reliable.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=maroon face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:maroon'><o:p> </o:p></span></font></p>
<div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
color=black face="Times New Roman"><span style='font-size:12.0pt;color:windowtext'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 color=black face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight:bold'>From:</span></font></b><font
size=2 color=black face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma;
color:windowtext'> John Biddiscombe [mailto:biddisco@cscs.ch] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, January 11, 2008
9:02 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Moreland, Kenneth<br>
<b><span style='font-weight:bold'>Cc:</span></b> paraview@paraview.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Paraview]
Intra-zonal surfaces</span></font><font color=black><span style='color:windowtext'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'>Ken<br>
<br>
Thanks for confirming what I suspected. As it is, I'm just finishing<br>
vtkMultiBlockUnstructuredGridAppend<br>
which iterates over all the leaf nodes and appends all Unstructured Grids into
a single dataset (dumps any other dataset types that may be present). Immensely
wasteful of space, but I'll just run it once and save the surface generated by
vtkGeometry filter for later use.<br>
<br>
Since D3 will find ghost cells for a single UnstructuredGrid that is split
across processors - I will consider making a modified version which accepts a
multiblock dataset (i.e. different leaf nodes of a compound dataset) and
operates that way (D3 doesn't expect points to be duplicated does it?). Not
sure how much work that would be - but in principal we only need to fool D3
into taking data from leaf nodes of a dataset rather than pieces of a dataset.<br>
<br>
That will work, yes?<br>
<br>
JB<br>
<br>
<br>
<br>
<br>
<o:p></o:p></span></font></p>
<pre wrap=""><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>John,<o:p></o:p></span></font></pre><pre><font size=2
color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>I am afraid that there is no good way to do what you want right now.<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>There is no filter that is able to directly determine which external<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>faces of each block are actually abutting or are inside another block.<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>You could use tools like D3 or Clean to Grid, but as you suspect you<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>first have to cram everything in a single unstructured grid. Right now<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>there is no filter to do that either. Writing one would be trivial, and<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>there has been talk on this list for doing it. I think no one has done<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>it because it is generally best to avoid doing so whenever possible.<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Does your CFD dataset happen to look like a brick? If so, you can fake<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>the operation with 6 slice filters on the boundaries of the data.<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>-Ken<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite><pre wrap=""><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>-----Original Message-----<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>From: <a
href="mailto:paraview-bounces+kmorel=sandia.gov@paraview.org">paraview-bounces+kmorel=sandia.gov@paraview.org</a><o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre></blockquote>
<pre wrap=""><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>[<a href="mailto:paraview">mailto:paraview</a>-<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite><pre wrap=""><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><a
href="mailto:bounces+kmorel=sandia.gov@paraview.org">bounces+kmorel=sandia.gov@paraview.org</a>] On Behalf Of John Biddiscombe<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Sent: Friday, January 11, 2008 7:10 AM<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>To: <a
href="mailto:paraview@paraview.org">paraview@paraview.org</a><o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Subject: [Paraview] Intra-zonal surfaces<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>When I load a complex CFD dataset with several dozen zones, I create a<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>multiblock data structure which has one dataset per zone/volume.<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>When visualizing this as a surface only and with transparency turned<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre></blockquote>
<pre wrap=""><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>on.<o:p></o:p></span></font></pre><pre><font size=2
color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite><pre wrap=""><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>The faces between zones are visible as artifacts inside the volume<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre></blockquote>
<pre wrap=""><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>where<o:p></o:p></span></font></pre><pre><font size=2
color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite><pre wrap=""><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>the zones abut. I was wondering if back face culling would remove<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre></blockquote>
<pre wrap=""><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>these,<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite><pre wrap=""><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>but of course, there are font faces there too.<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Is there any way of coaxing d3 or similar filter to generate ghost<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre></blockquote>
<pre wrap=""><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>cells<o:p></o:p></span></font></pre><pre><font size=2
color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite><pre wrap=""><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>that can be used to overcome these artifacts.<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>or<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>I am thinking that if I join all cells into a single unstructured grid<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>(in parallel if necessary) then these surface cells will disappear<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre></blockquote>
<pre wrap=""><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>(but<o:p></o:p></span></font></pre><pre><font size=2
color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite><pre wrap=""><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>perhaps there is a solution I have missed). Is there a filter to<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre></blockquote>
<pre wrap=""><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'>append<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre>
<blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' type=cite><pre wrap=""><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>all the zones into one already present in ParaView - like AppendFilter<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>for a multiblock->single unstructured grid.<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Thanks<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>JB<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>--<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>John Biddiscombe, email:biddisco @ cscs.ch<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><a
href="http://www.cscs.ch/about/BJohn.php">http://www.cscs.ch/about/BJohn.php</a><o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>CSCS, Swiss National Supercomputing Centre | Tel: +41 (91) 610.82.07<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Via Cantonale, 6928 <st1:place
w:st="on"><st1:City w:st="on">Manno</st1:City>, <st1:country-region w:st="on">Switzerland</st1:country-region></st1:place> | Fax: +41 (91) 610.82.82<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>_______________________________________________<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>ParaView mailing list<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><a
href="mailto:ParaView@paraview.org">ParaView@paraview.org</a><o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><a
href="http://www.paraview.org/mailman/listinfo/paraview">http://www.paraview.org/mailman/listinfo/paraview</a><o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre></blockquote>
<pre wrap=""><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'> <o:p></o:p></span></font></pre>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><br>
<br>
<br>
<o:p></o:p></span></font></p>
<pre><font size=2 color=black face="Courier New"><span style='font-size:10.0pt'>-- <o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>John Biddiscombe, email:biddisco @ cscs.ch<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'><a
href="http://www.cscs.ch/about/BJohn.php">http://www.cscs.ch/about/BJohn.php</a><o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>CSCS, Swiss National Supercomputing Centre | Tel: +41 (91) 610.82.07<o:p></o:p></span></font></pre><pre><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt'>Via Cantonale, 6928 <st1:place
w:st="on"><st1:City w:st="on">Manno</st1:City>, <st1:country-region w:st="on">Switzerland</st1:country-region></st1:place> | Fax: +41 (91) 610.82.82<o:p></o:p></span></font></pre></div>
</div>
</body>
</html>