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Hi Julien, <br>
<br>
I managed to do it by creating a camera a setting it to the renderer
instead of using the renderer's camera.<br>
<br>
thank you.<br>
<br>
Le 30/09/2011 14:50, Juan Carlos Prieto a écrit :
<blockquote cite="mid:4E85BB33.10204@creatis.insa-lyon.fr"
type="cite">
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Hi Julien, <br>
<br>
Yes the 3D position, so I'm now using the vtkPropPicker, this
picker will actually give me the world position in the actor where
the hit occurred. <br>
I'm trying to solve another problem now. When I change the
camera's position and view direction, the actor is not rendered
unless I perform some interaction with the window (e.x. left
click, zoom etc.), If I perform the pick then the result is empty.
<br>
<br>
The idea is to find a set of intersections given a set of rays, so
I don't know how to update the view with out the interaction. <br>
<br>
Is there a way to do this?<br>
<br>
Le 30/09/2011 14:03, Julien Finet a écrit :
<blockquote
cite="mid:CAKoWPPHwv3yFOQ1iYxWUNvbgFj46PUetu+iSpv-cOYgP_u1V5A@mail.gmail.com"
type="cite">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 moz-do-not-send="true"
href="mailto:prieto@creatis.insa-lyon.fr">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"> 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 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 moz-do-not-send="true"
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 moz-do-not-send="true"
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 moz-do-not-send="true"
href="http://www.creatis.insa-lyon.fr"
target="_blank">CREATIS</a> Tel:<a
moz-do-not-send="true"
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href="http://www.creatis.insa-lyon.fr/%7Eprieto"
target="_blank">Personal page</a>
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<br>
<div>-- <br>
Juan Carlos Prieto <font face="arial"
color="grey" size="2"> <br>
Phd Student <br>
<a moz-do-not-send="true"
href="http://www.creatis.insa-lyon.fr"
target="_blank">CREATIS</a> Tel:<a
moz-do-not-send="true"
href="tel:%2B33472438918" value="+33472438918"
target="_blank">+33472438918</a> <br>
7 Av Jean Capelle <br>
69621 Villeurbanne Cedex <br>
France <br>
<a moz-do-not-send="true"
href="http://www.creatis.insa-lyon.fr/%7Eprieto"
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<br>
<div class="moz-signature">-- <br>
Juan Carlos Prieto <font face="arial" color="grey" size="2"> <br>
Phd Student <br>
<a moz-do-not-send="true"
href="http://www.creatis.insa-lyon.fr">CREATIS</a>
Tel:+33472438918 <br>
7 Av Jean Capelle <br>
69621 Villeurbanne Cedex <br>
France <br>
<a moz-do-not-send="true"
href="http://www.creatis.insa-lyon.fr/%7Eprieto">Personal
page</a> </font> </div>
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<br>
<div class="moz-signature">-- <br>
Juan Carlos Prieto
<font face="arial" color="grey" size="2">
<br>
Phd Student
<br>
<a href="http://www.creatis.insa-lyon.fr">CREATIS</a>
Tel:+33472438918
<br>
7 Av Jean Capelle
<br>
69621 Villeurbanne Cedex
<br>
France <br>
<a href="http://www.creatis.insa-lyon.fr/%7Eprieto">Personal
page</a>
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