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<TITLE>Re: [Paraview] Isosurface</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Yes, you need cells to create an isosurface. The cells specify how the scalar field should be interpolated between points.<BR>
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The easiest way to impose cells on your points is to run the Delaunay 3D filter on them.<BR>
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-Ken<BR>
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On 1/20/09 8:17 PM, "Mare Libero" <<a href="mareliber27@yahoo.com">mareliber27@yahoo.com</a>> wrote:<BR>
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</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Hi,<BR>
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I am new to Paraview and I hope some of you can help me. I am trying to visualize an isosurface. I used to work with Matlab where I would input the data in 4D in the format: <X> <Y> <Z> <Intensity><BR>
To use Paraview, I generated a dataset in VTK format as an unstructured grid with no cells. The Intensities are associated to the corners of the cells as follow:<BR>
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</SPAN></FONT><FONT SIZE="2"><FONT FACE="Courier New"><SPAN STYLE='font-size:10pt'># vtk DataFile Version 3.1</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'> </SPAN></FONT><FONT SIZE="2"><FONT FACE="Courier New"><SPAN STYLE='font-size:10pt'>Volume</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'> </SPAN></FONT><FONT SIZE="2"><FONT FACE="Courier New"><SPAN STYLE='font-size:10pt'>ASCII</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'> </SPAN></FONT><FONT SIZE="2"><FONT FACE="Courier New"><SPAN STYLE='font-size:10pt'>DATASET UNSTRUCTURED_GRID</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'> </SPAN></FONT><FONT SIZE="2"><FONT FACE="Courier New"><SPAN STYLE='font-size:10pt'>POINTS 197173 FLOAT</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'> </SPAN></FONT><FONT SIZE="2"><FONT FACE="Courier New"><SPAN STYLE='font-size:10pt'>1 1 1</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'> </SPAN></FONT><FONT SIZE="2"><FONT FACE="Courier New"><SPAN STYLE='font-size:10pt'>1 1 6</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'> </SPAN></FONT><FONT SIZE="2"><FONT FACE="Courier New"><SPAN STYLE='font-size:10pt'>1 1 11</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'> ....<BR>
...<BR>
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</SPAN></FONT><FONT SIZE="2"><FONT FACE="Courier New"><SPAN STYLE='font-size:10pt'>POINT_DATA 197173</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'> </SPAN></FONT><FONT SIZE="2"><FONT FACE="Courier New"><SPAN STYLE='font-size:10pt'>SCALARS Intensities float</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'> </SPAN></FONT><FONT SIZE="2"><FONT FACE="Courier New"><SPAN STYLE='font-size:10pt'>LOOKUP_TABLE default</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'> </SPAN></FONT><FONT SIZE="2"><FONT FACE="Courier New"><SPAN STYLE='font-size:10pt'>20799.3681311062</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'> </SPAN></FONT><FONT SIZE="2"><FONT FACE="Courier New"><SPAN STYLE='font-size:10pt'>20803.8373905225</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'> </SPAN></FONT><FONT SIZE="2"><FONT FACE="Courier New"><SPAN STYLE='font-size:10pt'>20806.6752675851......<BR>
When I open this file, Paraview correctly identifies minimum and maximum values and the number of points. But I can't manage to visualize the contours.<BR>
Any suggestion? Do I need to generate CELLS data to draw isosurfaces? Can Paraview generate an isosurface solely from POINTS data? Thanks in advance.<BR>
A<BR>
</SPAN></FONT></FONT><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
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</SPAN></FONT></BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'><BR>
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**** Kenneth Moreland<BR>
*** Sandia National Laboratories<BR>
*********** <BR>
*** *** *** email: <a href="kmorel@sandia.gov">kmorel@sandia.gov</a><BR>
** *** ** phone: (505) 844-8919<BR>
*** web: <a href="http://www.cs.unm.edu/~kmorel">http://www.cs.unm.edu/~kmorel</a><BR>
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