<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">From the <a href="https://www.vtk.org/doc/nightly/html/classvtkPolyData.html" class="">vtk documentation</a>:</div><div class=""><br class=""></div><div class=""><a class="el" href="https://www.vtk.org/doc/nightly/html/classvtkPolyData.html" title="concrete dataset represents vertices, lines, polygons, and triangle strips " style="color: rgb(70, 101, 162); font-weight: bold; text-decoration: none; font-family: Roboto, sans-serif; font-size: 14px;">vtkPolyData</a><span style="font-family: Roboto, sans-serif; font-size: 14px; background-color: rgb(255, 255, 255);" class=""> represents a geometric structure consisting of vertices, lines, polygons, and/or triangle strips.</span></div><br class=""><div class="">Hexahedra are 3-dimensional cells; you cannot put a hexahedron into polydata. You can <a href="https://www.paraview.org/Wiki/VTK/Examples/Cxx/GeometricObjects/Hexahedron" class="">create an unstructured grid from 8 points</a>, and then <a href="https://www.vtk.org/Wiki/VTK/Examples/Cxx/PolyData/DataSetSurfaceFilter" class="">extract its surface as polydata</a>. What exactly are you trying to do?</div><div class=""><br class="webkit-block-placeholder"></div><div class="">
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px;">Thomas J. Corona, Ph.D.<br class="">Kitware, Inc.<br class="">Senior R&D Engineer<br class="">21 Corporate Drive<br class="">Clifton Park, NY 12065-8662<br class="">Phone: 518-881-4443</div></div>
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<br class=""><div><blockquote type="cite" class=""><div class="">On Nov 2, 2017, at 1:36 AM, Anniywell <<a href="mailto:wellq.an@gmail.com" class="">wellq.an@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="">I have 8 points, how to create hexahedron polydata?<br class=""><br class=""><br class=""><br class="">--<br class="">Sent from: <a href="http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html" class="">http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html</a><br class="">_______________________________________________<br class="">Powered by <a href="http://www.kitware.com" class="">www.kitware.com</a><br class=""><br class="">Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html" class="">http://www.kitware.com/opensource/opensource.html</a><br class=""><br class="">Please keep messages on-topic and check the VTK FAQ at: <a href="http://www.vtk.org/Wiki/VTK_FAQ" class="">http://www.vtk.org/Wiki/VTK_FAQ</a><br class=""><br class="">Search the list archives at: <a href="http://markmail.org/search/?q=vtkusers" class="">http://markmail.org/search/?q=vtkusers</a><br class=""><br class="">Follow this link to subscribe/unsubscribe:<br class=""><a href="http://public.kitware.com/mailman/listinfo/vtkusers" class="">http://public.kitware.com/mailman/listinfo/vtkusers</a><br class=""></div></div></blockquote></div><br class=""></body></html>