Hi Katie,<br><br>I'm guessing you're looking at the arrays that are available to pseudo-color with in the GUI. Those normals usually aren't in the filter output data set. To see what arrays are available, look under the information tab. To create those arrays for polydata (possibly using the extract surface filter) and then use the generate surface normals filter.<br>
<br>Andy<br><br><div class="gmail_quote">On Tue, Jun 26, 2012 at 2:09 PM, Kathleen Schwarz <span dir="ltr"><<a href="mailto:kas382@cornell.edu" target="_blank">kas382@cornell.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hello,<div>I am trying to transform a surface using a programmable filter, and I am unable to get the output to use the normals. Even the most basic filter:</div><div><span style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif"><br>
</span></div><div><span style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif"> </span><span dir="ltr" style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif">output.PointData.append(inputs[0].PointData['Normals'], 'Normals')</span></div>
<div><span dir="ltr" style="color:rgb(34,34,34);font-size:13px;font-family:arial,sans-serif"><br></span></div><div><font color="#222222" face="arial, sans-serif">results in the mesh being copied but the normals not being used. The normals appear as a Data Array, but are not used in rendering. However, using the copy arrays option in the properties of the programmable filter lead to the normals being used correctly. </font></div>
<div><font color="#222222" face="arial, sans-serif"><br></font></div><div><font color="#222222" face="arial, sans-serif">What I would like to do is to apply an affine transformation on the point positions and normals (and visualize contours of a scalar field on a uniform, nonorthogonal parallelepiped grid), so I can't just use the copy arrays option. </font></div>
<div><font color="#222222" face="arial, sans-serif"><br></font></div><div><font color="#222222" face="arial, sans-serif">Thanks in advance!</font></div><div><font color="#222222" face="arial, sans-serif">-Katie</font></div>
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