<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:m="http://schemas.microsoft.com/office/2004/12/omml" 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 12 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Giancarlo<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>It looks like the class vtkExplicitCell is abstract and there seems to be no child classes VTK. I haven’t used it (subclassed), so cannot help there.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Maybe the NURBS++ library can also output triangles or quads (it manages to generate them for OpenGL rendering, so they exist somewhere).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Then you could fill a vtkPolyData with these triangles/polygons and render as usual with VTK.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Good luck<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Bryn<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> vtkusers-bounces@vtk.org [mailto:vtkusers-bounces@vtk.org] <b>On Behalf Of </b>Giancarlo Facoetti<br><b>Sent:</b> Tuesday, August 23, 2011 9:55 AM<br><b>To:</b> vtkusers@vtk.org<br><b>Subject:</b> [vtkusers] visualizing NURBS++ surfaces (maybe a FAQ??)<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span class=apple-style-span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";background:white'>Hi everybody,</span></span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";background:white'><br><br><span class=apple-style-span>I'm using an open source library for NURBS management, called NURBS++.</span><br><span class=apple-style-span>I'm able to do everything: creation of the surface, control points moving, surface points moving, visualiation of the surface with OpenGL (gluNurbsSurface...)</span><br><span class=apple-style-span>I'm developing a VTK based application, and now I need to visualize the NURBS++ surfaces into VTK pipeline, therefore without using gluNurbsSurface but the VTK rendering</span><br><span class=apple-style-span>I found in the VTK documentation the class vtkExplicitCell.h that tells about NURBS surfaces, but I didn't understand how to use it. (<a href="http://davis.lbl.gov/Manuals/VTK-4.5/classvtkExplicitCell.html" target="_blank"><span style='color:#114170'>http://davis.lbl.gov/Manuals/VTK-4.5/classvtkExplicitCell.html</span></a>)</span><br><span class=apple-style-span>Do you have some suggestion please?</span><br><span class=apple-style-span>thank you!</span><br><br><span class=apple-style-span>Giancarlo</span></span> <o:p></o:p></p></div></div></body></html>