The problem isn't in your filters, it's in your Mapper.. L?ook at vtkMapper's InterpolateColorsBeforeMapping ( <a href="http://www.vtk.org/doc/nightly/html/classvtkMapper.html#9e0262837bb18752277a6a9c7b972583">http://www.vtk.org/doc/nightly/html/classvtkMapper.html#9e0262837bb18752277a6a9c7b972583
</a> ) .. You probably want to InterpolateColorsBeforeMappingOff, so that it will use the 1D Texture.<br><br><div><span class="gmail_quote">On 8/18/06, <b class="gmail_sendername">Naim</b> <<a href="mailto:naim@electromagneticworks.com">
naim@electromagneticworks.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div>
<div link="blue" vlink="purple" lang="EN-US">
<div>
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Hi all,</span></font></p>
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;">I used an unstructured grid to plot a continuous fringe (see
ContinuousFringe.jpg) below. The graduation of colors doesn't look smooth
in the circled area, it goes from red to blue right away and not as suppose to
be gradient from red to blue. I used this portion of code to plot my
unstructured grid:</span></font></p>
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p><font color="green" face="Courier New" size="2"><span style="font-size: 10pt; color: green;">// convert from
unstructuredGrid to PolyData</span></font></p>
<p><font face="Courier New" size="2"><span style="font-size: 10pt;">vtkGeometryFilter *extract =
vtkGeometryFilter::New();</span></font></p>
<p><font face="Courier New" size="2"><span style="font-size: 10pt;"> extract->SetInput(m_pUnstructuredGrid);</span></font></p>
<p><font face="Courier New" size="2"><span style="font-size: 10pt;">
extract->GetOutput()->ReleaseDataFlagOn();</span></font></p>
<p><font face="Courier New" size="2"><span style="font-size: 10pt;"> </span></font></p>
<p><font face="Courier New" size="2"><span style="font-size: 10pt;">vtkPolyDataNormals *normals =
vtkPolyDataNormals::New(); <font color="green"><span style="color: green;">// none</span></font></span></font></p>
<p><font face="Courier New" size="2"><span style="font-size: 10pt;">
normals->SetInputConnection(extract->GetOutputPort());</span></font></p>
<p><font face="Courier New" size="2"><span style="font-size: 10pt;">
normals->SetFeatureAngle(60.0);</span></font></p>
<p><font face="Courier New" size="2"><span style="font-size: 10pt;"> <font color="green"><span style="color: green;">normals->GetOutput()->ReleaseDataFlagOn();</span></font></span></font></p>
<p><font color="green" face="Courier New" size="2"><span style="font-size: 10pt; color: green;"> </span></font></p>
<p><font face="Courier New" size="2"><span style="font-size: 10pt;">vtkStripper *stripper = vtkStripper::New(); <font color="green"><span style="color: green;">// none</span></font></span></font></p>
<p style="margin-bottom: 12pt;"><font face="Courier New" size="2"><span style="font-size: 10pt;">
stripper->SetInputConnection(normals->GetOutputPort());</span></font></p>
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Please take a look at the attached file and let me know if i am
using the right filters to do my plot.</span></font></p>
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;">Thanks.</span></font></p>
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;"> </span></font></p>
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;" lang="FR-CA">Naim Himrane </span></font></p>
<p><font face="Times New Roman" size="3"><span style="font-size: 12pt;" lang="FR-CA">ElectromagneticWorks Inc.</span></font></p>
<p><font face="Arial" size="2"><span style="font-size: 10pt; font-family: Arial;" lang="FR-CA"> </span></font></p>
</div>
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