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Have you tried to probe (vtkProbeFilter) the temperature data using the
tube as probe ?
<p>JDC
<p>"ivo.leitao" wrote:
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<div class="MsoNormal"><span lang=PT style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>Hi
!</font></font><o:p></o:p></span></div>
<p class="MsoNormal"><span lang=PT style='font-size:10.0pt;
font-family:Arial'><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>I
have a rectilinear grid with wind speed at certain latitudes/longitudes/days
and that grid contains only vector data.</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>I
was able to build a stream tube to represent the data without problems,
but now I need to use another file with the temperature data (also on a
rectilinear grid) at those same latitude/longitude/days to colorize the
stream tube. Since I do not have any scalar data on the initial file I’ve
tried to use the Merge Filter to do it but I was unable to colorize de
data tube.</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>I
have tried to do something like this:</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>#
Streamline</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>vtkRungeKutta4
integ</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>vtkStreamLine
streamLine</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
streamLine SetInput [windSpeedRectilinearGridReader GetOutput]</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
streamLine SetStartPosition 0 30 61</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
streamLine SetMaximumPropagationTime 44</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
streamLine SetStepLength 0.01</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
streamLine SetIntegrationStepLength 0.01</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
streamLine SetIntegrationDirectionToForward</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
streamLine OrientationScalarsOff</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
streamLine SpeedScalarsOff</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
streamLine SetIntegrator integ</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>#
Streamtube</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>vtkTubeFilter
streamTube</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
streamTube SetInput [streamLine GetOutput]</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
streamTube SetRadius 1</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
streamTube SetNumberOfSides 12</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
streamTube SetVaryRadiusToVaryRadiusByVector</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>vtkMergeFilter
mergeFilter</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
mergeFilter SetGeometry [streamTube GetOutput]</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
mergeFilter SetScalars [temperatureRectilinearGridReader GetOutput]</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>vtkPolyDataMapper
polyDataMapper</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
polyDataMapper SetInput [mergeFilter GetOutput]</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
polyDataMapper ScalarVisibilityOn</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
eval polyDataMapper SetScalarRange [[[[temperatureRectilinearGridReader
GetOutput] GetPointData] GetScalars] GetRange]</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>vtkActor
actor</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>
actor SetMapper polyDataMapper</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>It
didn’t work, so can anynone help me with this ? How do I colorize the stream
tube with external scalar data ?</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>Tnks
for any answer concerning this subject</font></font><o:p></o:p></span>
<p class="MsoNormal"><span style='font-size:10.0pt;
font-family:Arial'><font face="Arial"><font size=-1>Best
Regars, Ivo Leitão</font></font><o:p></o:p></span></div>
<pre>
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</blockquote>
<p>--
<br>João Duarte Cunha
<br>Investigador-Coordenador
<br>Director do Centro da Qualidade na Construção
<br>jdc@lnec.pt
<br>
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