<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">Hi Chris,</div><div class=""><br class=""></div><div class="">I’m not sure I understand. As Armin mentioned:</div><div class=""><br class=""></div><div class=""></div><blockquote type="cite" class=""><div class="">a unstructured grid (without polyhedral cells) is described by three arrays:<br class="">1) connectivity: An array storing the point ids of the unique points of<br class=""> all cells.<br class="">2) offsets: An array indicating the end position of each cell in the<br class=""> connectivity array.<br class="">3) types: An array storing the types of each cell.</div></blockquote><div class=""><br class=""></div><div class="">So, what you are seeing in the .vtu file is the full connectivity. If you would like the cell information in a different format, It may be best to use a vtkCellIterator and run over the vtkUnstructuredData with it. The use of vtkCellIterator is well documented in vtkCellIterator.h, though for some reason the Doxygen version of it appears incomplete.</div><div class=""><br class=""></div><div class="">Sincerely,</div><div class="">T.J.</div><br class=""><div class="">
<div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">Thomas J. Corona, Ph.D.<br class="">Kitware, Inc.<br class="">R&D Engineer<br class="">21 Corporate Drive<br class="">Clifton Park, NY 12065-8662<br class="">Phone: 518-881-4443</div></div></div></div></div></div>
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<br class=""><div><blockquote type="cite" class=""><div class="">On Aug 24, 2016, at 1:58 PM, Christopher Neal <<a href="mailto:chrisneal@snumerics.com" class="">chrisneal@snumerics.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="WordSection1" style="page: WordSection1; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: rgb(255, 255, 255);"><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><span style="font-size: 11pt; font-family: Calibri;" class="">Thank you T.J. <span class="Apple-converted-space"> </span><br class=""><br class="">I think I see now how the information is organized via those ‘offsets’. Do you know if there is a function call that can tell it to write the actual connectivity out in full? If it’s really obscure or would be difficult to find out, then don’t worry about it.<o:p class=""></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""><o:p class=""> </o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><span style="font-size: 11pt; font-family: Calibri;" class="">-Chris<o:p class=""></o:p></span></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""><o:p class=""> </o:p></span></div><div style="border-style: solid none none; border-top-color: rgb(181, 196, 223); border-top-width: 1pt; padding: 3pt 0in 0in;" class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><b class=""><span style="font-family: Calibri;" class="">From:<span class="Apple-converted-space"> </span></span></b><span style="font-family: Calibri;" class="">"T.J. Corona" <<a href="mailto:tj.corona@kitware.com" class="">tj.corona@kitware.com</a>><br class=""><b class="">Date:<span class="Apple-converted-space"> </span></b>Wednesday, August 24, 2016 at 12:52 PM<br class=""><b class="">To:<span class="Apple-converted-space"> </span></b>Christopher Neal <<a href="mailto:chrisneal@snumerics.com" class="">chrisneal@snumerics.com</a>><br class=""><b class="">Cc:<span class="Apple-converted-space"> </span></b>Benson Muite via ParaView <<a href="mailto:paraview@paraview.org" class="">paraview@paraview.org</a>><br class=""><b class="">Subject:<span class="Apple-converted-space"> </span></b>Re: [Paraview] VTK XML Unstructured Grid format<o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><o:p class=""> </o:p></div></div><div class=""><div class=""><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class="">Hi Chris,<o:p class=""></o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class="">I don’t think the line breaks represent discrete cells. If you count them, there are 32 values for the connectivity (4 cells x 8 points). <o:p class=""></o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><o:p class=""> </o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class="">Sincerely,<o:p class=""></o:p></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class="">T.J.<o:p class=""></o:p></div></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><o:p class=""> </o:p></div><div class=""><div class=""><div class=""><div class=""><div class=""><div class=""><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><span style="" class="">Thomas J. Corona, Ph.D.<br class="">Kitware, Inc.<br class="">R&D Engineer<br class="">21 Corporate Drive<br class="">Clifton Park, NY 12065-8662<br class="">Phone: 518-881-4443<o:p class=""></o:p></span></div></div></div></div></div></div></div></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><o:p class=""> </o:p></div><div class=""><blockquote style="margin-top: 5pt; margin-bottom: 5pt;" class="" type="cite"><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class="">On Aug 24, 2016, at 12:50 PM, Christopher Neal <<a href="mailto:chrisneal@snumerics.com" style="color: purple; text-decoration: underline;" class="">chrisneal@snumerics.com</a>> wrote:<o:p class=""></o:p></div></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><o:p class=""> </o:p></div><div class=""><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class="">Hi All,</span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""> </span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class="">Does anyone have a link to an example or documentation describing how one can interpret a *.vtu file that is XML ascii? I’m looking at a file that was written for a 2x2x1 group of cells i.e. 4 hexahedral cells, and the connectivity looks like:</span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""> </span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""><Cells></span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""> <DataArray type="Int64" Name="connectivity" format="ascii" RangeMin="0" RangeMax="17"></span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""> 0 6 8 2 1 7</span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""> 9 3 2 8 10 4</span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""> 3 9 11 5 6 12</span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""> 14 8 7 13 15 9</span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""> 8 14 16 10 9 15</span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""> 17 11</span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""> </DataArray></span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""> <DataArray type="Int64" Name="offsets" format="ascii" RangeMin="8" RangeMax="32"></span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""> 8 16 24 32</span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""> </DataArray></span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""> <DataArray type="UInt8" Name="types" format="ascii" RangeMin="12" RangeMax="12"></span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""> 12 12 12 12</span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""> </DataArray></span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""> </Cells></span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class=""><br class="">I can’t seem to understand the connectivity info that is displayed. I would image there should be 8 entries per line for a hexahedral cell.</span><span style="font-size: 11pt; font-family: MingLiU;" class=""><br class=""><br class=""><br class=""></span><span style="font-size: 11pt; font-family: Calibri;" class="">Any material on this would be greatly appreciated.</span><span style="font-size: 11pt; font-family: MingLiU;" class=""><br class=""><br class=""></span><span style="font-size: 11pt; font-family: Calibri;" class="">Thank you,</span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div class=""><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman'; background-color: white;" class=""><span style="font-size: 11pt; font-family: Calibri;" class="">Chris Neal</span><span style="font-family: Calibri;" class=""><o:p class=""></o:p></span></div></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><span style="font-size: 9pt; font-family: Helvetica; background-color: white; background-position: initial initial; background-repeat: initial initial;" class="">_______________________________________________</span><span style="font-size: 9pt; font-family: Helvetica;" class=""><br class=""><span style="background-color: white; background-position: initial initial; background-repeat: initial initial;" class="">Powered by<span class="apple-converted-space"> </span></span></span><a href="http://www.kitware.com/" style="color: purple; text-decoration: underline;" class=""><span style="font-size: 9pt; font-family: Helvetica; color: rgb(149, 79, 114); background-color: white; background-position: initial initial; background-repeat: initial initial;" class="">www.kitware.com</span></a><span style="font-size: 9pt; font-family: Helvetica;" class=""><br class=""><br class=""><span style="background-color: white; background-position: initial initial; background-repeat: initial initial;" class="">Visit other Kitware open-source projects at<span class="apple-converted-space"> </span></span></span><a href="http://www.kitware.com/opensource/opensource.html" style="color: purple; text-decoration: underline;" class=""><span style="font-size: 9pt; font-family: Helvetica; color: rgb(149, 79, 114); background-color: white; background-position: initial initial; background-repeat: initial initial;" class="">http://www.kitware.com/opensource/opensource.html</span></a><span style="font-size: 9pt; font-family: Helvetica;" class=""><br class=""><br class=""><span style="background-color: white; background-position: initial initial; background-repeat: initial initial;" class="">Please keep messages on-topic and check the ParaView Wiki at:<span class="apple-converted-space"> </span></span></span><a href="http://paraview.org/Wiki/ParaView" style="color: purple; text-decoration: underline;" class=""><span style="font-size: 9pt; font-family: Helvetica; color: rgb(149, 79, 114); background-color: white; background-position: initial initial; background-repeat: initial initial;" class="">http://paraview.org/Wiki/ParaView</span></a><span style="font-size: 9pt; font-family: Helvetica;" class=""><br class=""><br class=""><span style="background-color: white; background-position: initial initial; background-repeat: initial initial;" class="">Search the list archives at:<span class="apple-converted-space"> </span></span></span><a href="http://markmail.org/search/?q=ParaView" style="color: purple; text-decoration: underline;" class=""><span style="font-size: 9pt; font-family: Helvetica; color: rgb(149, 79, 114); background-color: white; background-position: initial initial; background-repeat: initial initial;" class="">http://markmail.org/search/?q=ParaView</span></a><span style="font-size: 9pt; font-family: Helvetica;" class=""><br class=""><br class=""><span style="background-color: white; background-position: initial initial; background-repeat: initial initial;" class="">Follow this link to subscribe/unsubscribe:</span><br class=""></span><a href="http://public.kitware.com/mailman/listinfo/paraview" style="color: purple; text-decoration: underline;" class=""><span style="font-size: 9pt; font-family: Helvetica; color: rgb(149, 79, 114); background-color: white; background-position: initial initial; background-repeat: initial initial;" class="">http://public.kitware.com/mailman/listinfo/paraview</span></a><o:p class=""></o:p></div></div></blockquote></div><div style="margin: 0in 0in 0.0001pt; font-size: 12pt; font-family: 'Times New Roman';" class=""><o:p class=""> </o:p></div></div></div></div></div></blockquote></div><br class=""></body></html>