Something like the code below should work for the programmable filter. Note that this assumes the input and output are polydata.<br><br>
<meta name="qrichtext" content="1"><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><style type="text/css">
p, li { white-space: pre-wrap; }
</style>
<table style="margin: 4px;">
<tbody><tr>
<td style="border: medium none;">
<p style="margin: 0px; text-indent: 0px;">pdi = self.GetPolyDataInput()</p>
<p style="margin: 0px; text-indent: 0px;">pdo = self.GetPolyDataOutput()</p>
<p style="margin: 0px; text-indent: 0px;">pdo.SetPoints(pdi.GetPoints())</p>
<p style="margin: 0px; text-indent: 0px;">np = pdo.GetNumberOfPoints()</p>
<p style="margin: 0px; text-indent: 0px;">a = vtk.vtkUnsignedCharArray()</p>
<p style="margin: 0px; text-indent: 0px;">a.SetNumberOfComponents(3)</p>
<p style="margin: 0px; text-indent: 0px;">a.SetNumberOfTuples(np)</p>
<p style="margin: 0px; text-indent: 0px;">a.SetName("color")</p>
<p style="margin: 0px; text-indent: 0px;">r = pdi.GetPointData().GetArray("r")</p>
<p style="margin: 0px; text-indent: 0px;">g = pdi.GetPointData().GetArray("g")</p>
<p style="margin: 0px; text-indent: 0px;">b = pdi.GetPointData().GetArray("b")</p>
<p style="margin: 0px; text-indent: 0px;"></p>
<p style="margin: 0px; text-indent: 0px;">for i in range(np):</p>
<p style="margin: 0px; text-indent: 0px;"> a.SetValue(i*3, r.GetValue(i))</p>
<p style="margin: 0px; text-indent: 0px;"> a.SetValue(i*3+1, g.GetValue(i))</p>
<p style="margin: 0px; text-indent: 0px;"> a.SetValue(i*3+2, b.GetValue(i))</p>
<p style="margin: 0px; text-indent: 0px;"></p>
<p style="margin: 0px; text-indent: 0px;"><br></p><p style="margin: 0px; text-indent: 0px;">pdo.GetPointData().AddArray(a)</p>
<p style="margin: 0px; text-indent: 0px;"></p></td></tr></tbody></table><br><br><div class="gmail_quote">On Fri, Jul 30, 2010 at 2:13 AM, Andrew Maclean <span dir="ltr"><<a href="mailto:andrew.amaclean@gmail.com">andrew.amaclean@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">I have a file that looks like this:<br>
x y z r g b px py<br>
<br>
-2.064749 -1.623789 5.264024 254 254 254 5.000000 7.000000<br>
<br>
-2.267242 -1.790226 5.803583 254 254 254 5.000000 8.000000<br>
<br>
-2.251401 -1.784915 5.786366 254 254 254 5.000000 9.000000<br>
<br>
-1.401535 -1.134097 3.676532 201 201 201 5.000000 14.000000<br>
<br>
-1.420374 -1.154109 3.741410 179 179 179 5.000000 15.000000<br>
<br>
...<br>
<br>
In ParaVew, I use the inbuilt CSV reader and get a table of labelled columns.<br>
In order tot get the points, I use a TableToPoints filter.<br>
The output of this filter is a table consisting of r,g,b, px, py,<br>
points, point ID.<br>
This plots OK in 3D.<br>
<br>
How can I transform the r, g, b arrays into a vtkUnsignedCharArray in<br>
order to add colour information to the points?<br>
I have been trying to use a programmable filter but don't seem to be<br>
able to access the r, g, b components.<br>
Also will the other components of the array be passed through, namely<br>
(points, and px, py)? Ultimately I want to create a 2d image of the<br>
px, py and colours.<br>
<br>
<br>
<br>
Any help appreciated.<br>
<br>
Thanks<br>
Andrew<br>
<br>
--<br>
___________________________________________<br>
Andrew J. P. Maclean<br>
Centre for Autonomous Systems<br>
The Rose Street Building J04<br>
The University of Sydney 2006 NSW<br>
AUSTRALIA<br>
Ph: +61 2 9351 3283<br>
Fax: +61 2 9351 7474<br>
URL: <a href="http://www.acfr.usyd.edu.au/" target="_blank">http://www.acfr.usyd.edu.au/</a><br>
___________________________________________<br>
_______________________________________________<br>
Powered by <a href="http://www.kitware.com" target="_blank">www.kitware.com</a><br>
<br>
Visit other Kitware open-source projects at <a href="http://www.kitware.com/opensource/opensource.html" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
<br>
Please keep messages on-topic and check the ParaView Wiki at: <a href="http://paraview.org/Wiki/ParaView" target="_blank">http://paraview.org/Wiki/ParaView</a><br>
<br>
Follow this link to subscribe/unsubscribe:<br>
<a href="http://www.paraview.org/mailman/listinfo/paraview" target="_blank">http://www.paraview.org/mailman/listinfo/paraview</a><br>
</blockquote></div><br>