<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:arial, helvetica, sans-serif;font-size:10pt"><div style="color: black; font-family: arial, helvetica, sans-serif; font-size: 10pt; "></div><div style="color: black; font-family: arial, helvetica, sans-serif; font-size: 10pt; ">Heh,</div><div style="color: black; font-family: arial, helvetica, sans-serif; font-size: 10pt; "><br></div><div style="color: black; font-family: arial, helvetica, sans-serif; font-size: 10pt; ">I was able to figure it out in the meant time. All that was needed is to use SetOpacity under the actors Property. Results look really neat!</div><div style="color: black; font-family: arial, helvetica, sans-serif; font-size: 10pt; "><br></div><div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space: pre; ">
</span>VTK_CREATE(vtkUnstructuredGridReader,reader);</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>reader->SetFileName("part_ele.vtk");</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><br></font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>VTK_CREATE(vtkVertexGlyphFilter, filter);</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>filter->SetInputConnection(reader->GetOutputPort());</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>filter->Update();</font></div><div><span
class="Apple-tab-span" style="white-space:pre"><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"> </font></span></div><div><span class="Apple-style-span" style="font-family: arial, helvetica, sans-serif; font-size: small; "><span class="Apple-tab-span" style="white-space:pre"> </span></span><span class="Apple-style-span" style="font-family: arial, helvetica, sans-serif; font-size: small; ">//Create a mapper and actor</span></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>VTK_CREATE(vtkPolyDataMapper, mapper);</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>mapper->SetInputConnection(filter->GetOutputPort());</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif"
size="2"> </font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>actor = vtkActor::New();</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>actor->SetMapper(mapper);</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space:pre"> </span>actor->GetProperty()->SetPointSize(3);</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><span class="Apple-tab-span" style="white-space: pre; "> </span>actor->GetProperty()->SetOpacity(0.3);</font></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><br></font></div><font class="Apple-style-span" face="arial, helvetica, sans-serif"
size="2"> </font></div><span style="font-weight: bold; font-style: italic; color: black; font-family: arial, helvetica, sans-serif; font-size: 10pt; "><span class="Apple-style-span" style="font-size:small;">-- Lubos Brieda</span></span><span class="Apple-style-span" style="font-size: small; font-style: normal; font-weight: normal; color: black; font-family: arial, helvetica, sans-serif; "> </span><span style="font-weight: bold; font-style: italic; color: black; font-family: arial, helvetica, sans-serif; font-size: 10pt; "><span class="Apple-style-span" style="font-size:small;">--<br></span></span><div style="color: black; font-family: arial, helvetica, sans-serif; font-size: 10pt; "><span class="Apple-style-span" style="font-family:arial, helvetica, sans-serif;font-size:small;"><i>Slovak recipes: <a rel="nofollow" target="_blank" href="http://www.slovakcooking.com">www.slovakcooking.com</a> </i></span></div><div style="color: black;
font-family: arial, helvetica, sans-serif; font-size: 10pt; "><span class="Apple-style-span" style="font-family:arial, helvetica, sans-serif;font-size:small;"></span><span class="Apple-style-span" style="font-family:arial, helvetica, sans-serif;font-size:small;"><br></span></div><div style="color: black; font-family: arial, helvetica, sans-serif; font-size: 10pt; "><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><i><br></i></font></div><div style="color: black; font-family: arial, helvetica, sans-serif; font-size: 10pt; "><br></div><div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; color: black; "><br><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><font size="2" face="Tahoma"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> Lubos Brieda <lbrieda@yahoo.com><br><b><span style="font-weight: bold;">To:</span></b> vtkusers@vtk.org<br><b><span
style="font-weight: bold;">Sent:</span></b> Sat, March 26, 2011 9:50:40 AM<br><b><span style="font-weight: bold;">Subject:</span></b> [vtkusers] volume rendering of unstructured points<br></font><br><div style="font-family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;"><div></div><div>Hi everyone,</div><div><br></div><div>I would like to visualize a large number of particles in a manner similar to the "CUDA Smoke Particles" demo (<a rel="nofollow" target="_blank" href="http://www.youtube.com/watch?v=4uoVRs_zLn8">http://www.youtube.com/watch?v=4uoVRs_zLn8</a>). First I thought this will be quite straightforward using the volume render (similar to the ironProt.vtk example). However, it appears than in order to use a volume renderer, my data needs to be an image map - which implies structured grid. My data is a large number of (x,y,z) coordinates. </div><div><br></div><div>Question for you, what is the best approach? I can use
VertexGlyphFilter (<a rel="nofollow" target="_blank" href="http://www.vtk.org/Wiki/VTK/Examples/Cxx/Filtering/vtkVertexGlyphFilter">http://www.vtk.org/Wiki/VTK/Examples/Cxx/Filtering/vtkVertexGlyphFilter</a>) to plot the individual points, but what I really need is for each point to be a semi-translucent filter so that in regions with many points the cloud appears darker. </div><div><br></div><div>Thanks for all your help!<br> </div><span style="font-weight:bold;font-style:italic;"><span class="Apple-style-span" style="font-size:small;">-- Lubos Brieda</span></span><span class="Apple-style-span" style="font-size:small;font-style:normal;font-weight:normal;"> </span><span style="font-weight:bold;font-style:italic;"><span class="Apple-style-span" style="font-size:small;">--<br></span></span><div><span class="Apple-style-span" style="font-family:arial, helvetica, sans-serif;font-size:small;"><i>Slovak recipes: <a rel="nofollow"
target="_blank" href="http://www.slovakcooking.com">www.slovakcooking.com</a> </i></span></div><div><span class="Apple-style-span" style="font-family:arial, helvetica, sans-serif;font-size:small;"></span><span class="Apple-style-span" style="font-family:arial, helvetica, sans-serif;font-size:small;"><br></span></div><div><font class="Apple-style-span" face="arial, helvetica, sans-serif" size="2"><i><br></i></font></div><div><br></div><div style=""></div>
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