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<p>Hi Sebastien,</p>
I stored the data as vtk data and used the vtkDataConverter which
seemed to work fine. When I run the code, every actor appears
exactly at the right place. So I guess the information in the vtk
data must be correct (without ever using any function like
"setPosition"). Though I do not understand why I cannot retrieve the
information of their positions in the code. <br>
<p>Here is how I read my data files, it is a function I found in the
documentation:</p>
<p>function loadSegment(string, actor, renderer, i){<br>
const reader = vtkHttpDataSetReader.newInstance({ fetchGzip:
true });<br>
reader.setUrl(string).then(() => {<br>
reader.loadData().then(() => {<br>
renderer.resetCamera();<br>
renderWindow.render();<br>
});<br>
});<br>
const mapper = vtkMapper.newInstance();<br>
mapper.setInputConnection(reader.getOutputPort());<br>
actor.setMapper(mapper);<br>
renderer.addActor(actor);<br>
}</p>
<p>Any ideas what could be wrong?</p>
<p>Thank you for your help!<br>
</p>
<br>
<div class="moz-cite-prefix">Am 20.10.2017 um 21:39 schrieb
Sebastien Jourdain:<br>
</div>
<blockquote
cite="mid:CABObKxegcx0h0Nm2XVjVQkzXue+Rq+jumZNN=yjX_MbLnEeOaQ@mail.gmail.com"
type="cite">
<div dir="ltr">Then I believe your dataset is not valid. How did
you build it?
<div><br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Fri, Oct 20, 2017 at 1:07 PM, Katrin
Hartwig <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:katrin_hartwig@gmx.de" target="_blank">katrin_hartwig@gmx.de</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div style="font-family:Verdana;font-size:12.0px">
<div>Hi Sebastian and Logan,
<div>
<div> </div>
<div>thank you a lot for your help and i apologize
for my late answer!</div>
<div>Unfortunately I still could not solve the
problem. I tried both suggestions:</div>
<div>With <strong>actor</strong>.getCenter() I get
the default-values (0,0,0) for each actor. So I
tried to get the information of the dataset as you
suggested:</div>
<span class="">
<div> </div>
<div> dataset = mapper.getInputData();</div>
<div> bounds = dataset.getBounds();</div>
<div> </div>
</span>
<div>By doing so I get the following error massage:</div>
<div><strong> "getBounds called on an array
with components of 1"</strong></div>
<div> </div>
<div>The output of getBounds remains default because
of the error.</div>
<div> </div>
<div>As I could not find any solutions yet, I would
be grateful for any help!</div>
<div> </div>
<div>Thank you</div>
<div>Katrin</div>
<div> </div>
<div name="quote" style="margin:10px 5px 5px
10px;padding:10px 0 10px 10px;border-left:2px
solid #c3d9e5;word-wrap:break-word">
<div style="margin:0 0 10px 0"><b>Gesendet:</b> Montag,
18. September 2017 um 16:38 Uhr<br>
<b>Von:</b> "Sebastien Jourdain" <<a
moz-do-not-send="true"
href="mailto:sebastien.jourdain@kitware.com"
target="_blank">sebastien.jourdain@kitware.<wbr>com</a>><br>
<b>An:</b> "Katrin Hartwig" <<a
moz-do-not-send="true"
href="mailto:katrin_hartwig@gmx.de"
target="_blank">katrin_hartwig@gmx.de</a>><br>
<b>Cc:</b> vtkusers <<a
moz-do-not-send="true"
href="mailto:vtkusers@vtk.org" target="_blank">vtkusers@vtk.org</a>><br>
<b>Betreff:</b> Re: [vtkusers] VTK-JS: How to
get Position of actor</div>
<div>
<div class="h5">
<div name="quoted-content">
<div>Hi Katrin,
<div> </div>
<div>The actor position only describe the
relative position to the data, that's
why by default they are always (0,0,0).</div>
<div>Which means its your source or
dataset that has the information about
the position that you are looking for.</div>
<div> </div>
<div>For example to find the bounds of a
rendered dataset you can do as follow.</div>
<div> </div>
<div>dataset = mapper.getInputData();</div>
<div>bounds = dataset.getBounds();</div>
<div> </div>
<div>// bounds is an array as follow:</div>
<div>// [ minX, maxX, minY, maxY, minZ,
maxZ]</div>
<div> </div>
<div>Hope that helps,</div>
<div> </div>
<div>Otherwise you can learn more on the
basic concepts behind VTK here: <a
moz-do-not-send="true"
href="https://www.vtk.org/vtk-users-guide/"
target="_blank">https://www.vtk.org/vtk-<wbr>users-guide/</a></div>
<div> </div>
<div>Seb</div>
</div>
<div class="gmail_extra">
<div class="gmail_quote">On Mon, Sep 18,
2017 at 7:31 AM, Katrin Hartwig <span><<a
moz-do-not-send="true"
href="mailto:katrin_hartwig@gmx.de"
target="_blank">katrin_hartwig@gmx.de</a>></span>
wrote:
<blockquote class="gmail_quote"
style="margin:0 0 0
0.8ex;border-left:1.0px
rgb(204,204,204)
solid;padding-left:1.0ex">
<div>
<div
style="font-family:Verdana;font-size:12.0px">
<div>Dear all,</div>
<div> </div>
<div>I am using a visualization of
several actors with VTK-js.
Unfortunately, when using <em>actor.getPosition()
</em>I always get [0,0,0] as a
result, no matter which actor I
checked, although they appear on
different positions in my
rendering window.</div>
<div>How can I get the real
positions or centers of the
different actors?</div>
<div> </div>
<div>As I am completely new to
VTK-js and I could not find any
solutions to my problem, any
help would be great!</div>
<div> </div>
<div>Thank you</div>
<div><span
class="m_9222974002551251524HOEnZb"><font
color="#888888">Katrin</font></span></div>
</div>
</div>
<br>
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