Hi Juan,<div>if you use a cellpicker, keep in mind that the volume ray caster is under the hood a cube with 6 faces (technically, with 12triangular faces). So you always pick the bounds of the volume.</div><div>Are you sure you are interested in the cell and not the 3D position ?</div>
<div>julien.<br><br><div class="gmail_quote">On Fri, Sep 30, 2011 at 7:38 AM, Juan Carlos Prieto <span dir="ltr"><<a href="mailto:prieto@creatis.insa-lyon.fr">prieto@creatis.insa-lyon.fr</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<u></u>
<div bgcolor="#ffffff" text="#000000">
Hi Julien, <br>
<br>
Thank you very much for the presentation, I kept on looking and I
saw that using a vtkCellPicker might do the job of finding the
intersection of a ray against an actor in a renderer. <br>
To do this, I'm moving the camera to look in the direction where I
want the intersection to happen, but it seems that after producing
the pick, it always finds the same cell in the actor. <br>
<br>
Can you give me some suggestion on how should I do this? <br>
<br>
Thank you very much<br>
<br>
Le 29/09/2011 20:22, Julien Finet a écrit :
<div><div></div><div class="h5"><blockquote type="cite">Hi Juan,
<div><br>
</div>
<div><br>
</div>
<div>You can find a GPU ray casting high level presentation in the
Kitware Source of October 2009:
<div><a href="http://www.kitware.com/products/archive/kitware_quarterly0708.pdf" target="_blank">http://www.kitware.com/products/archive/kitware_quarterly0708.pdf</a></div>
<div><br>
</div>
<div>Hth,</div>
<div>Julien.<br>
<br>
<div class="gmail_quote">On Thu, Sep 29, 2011 at 11:54 AM,
Juan Carlos Prieto <span dir="ltr"><<a href="mailto:prieto@creatis.insa-lyon.fr" target="_blank">prieto@creatis.insa-lyon.fr</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">
<div bgcolor="#ffffff" text="#000000"> Dear VTK Users, <br>
<br>
I was wondering if anyone can point me out to the
documentation of the VTK rendering pipeline, I want to
analyze how the ray casting is done as I came across a
little problem where I need find the point of
intersection in the surface. <br>
<br>
Thank you very much. <br>
<font color="#888888"> <br>
<div>-- <br>
Juan Carlos Prieto <font face="arial" color="grey" size="2"> <br>
Phd Student <br>
<a href="http://www.creatis.insa-lyon.fr" target="_blank">CREATIS</a> Tel:<a href="tel:%2B33472438918" value="+33472438918" target="_blank">+33472438918</a>
<br>
7 Av Jean Capelle <br>
69621 Villeurbanne Cedex <br>
France <br>
<a href="http://www.creatis.insa-lyon.fr/%7Eprieto" target="_blank">Personal page</a> </font> </div>
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<br>
</div>
</div>
</blockquote>
<br>
<div>-- <br>
Juan Carlos Prieto
<font face="arial" color="grey" size="2">
<br>
Phd Student
<br>
<a href="http://www.creatis.insa-lyon.fr" target="_blank">CREATIS</a>
Tel:<a href="tel:%2B33472438918" value="+33472438918" target="_blank">+33472438918</a>
<br>
7 Av Jean Capelle
<br>
69621 Villeurbanne Cedex
<br>
France <br>
<a href="http://www.creatis.insa-lyon.fr/%7Eprieto" target="_blank">Personal
page</a>
</font>
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</blockquote></div><br></div>