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<p class="MsoNormal"><span style="font-size:11.0pt">Sorry, I meant the vtkColorTransferFunction, not the vtkVolumeProperty.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">-Alister<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="color:black">From: </span></b><span style="color:black">"Maguire, Alister Owen" <maguire7@llnl.gov><br>
<b>Date: </b>Tuesday, September 12, 2017 at 2:45 PM<br>
<b>To: </b>"vtkusers@vtk.org" <vtkusers@vtk.org><br>
<b>Subject: </b>Avoid rendering values outside of range<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt">Hello, </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I’m using vtkSmartVolumeMapper for volume rendering within VisIt, and I’m wondering if there is a way to “ignore” particular scalar values (either anything that exists outside of a range, or even ignoring
a specific value). When resampling unstructured data into structured grids, there is often empty space in the grid that is populated with a default value that exists outside of the datasets range, and I’d like for this default value to be ignored while rendering.
</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I see that vtkVolumeProperty has the option to set the color for values that exists outside of the range, but I don’t see an equivalent for opacity, which would be one way to handle this… Any ideas?</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Best, </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Alister</span><o:p></o:p></p>
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