<div dir="ltr">It sounds like the billboard actor will give you what you want for sure then.<div><br></div><div>Until you have that available, there are a couple other ways to do this:</div><div><br></div><div>1) vtkTextMapper with a vtkFollower. vtkTextMapper also has configurable text properties, unlike the vector text.</div><div><br></div><div>2) vtkTextActor -- you can set this 2D actor's position coordinate to a 3D world position and it should show up in the right spot. However, it is always rendered on top of all 3D geometry, which may or may not be desirable in your case.<br><div><div class="gmail_extra"><br></div><div class="gmail_extra">I'd really avoid using vtkVectorText if at all possible (ie. unless you *really* need the text to be rendered as polydata instead of a textured quad). I think the vtkTextMapper/vtkFollower approach would make the most sense here.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Cheers,</div><div class="gmail_extra">Dave</div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Feb 10, 2017 at 4:18 AM, M. Jordan <span dir="ltr"><<a href="mailto:mjordan@live.at" target="_blank">mjordan@live.at</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div id="m_-494195518645984562divtagdefaultwrapper" style="font-size:12pt;color:#000000;font-family:Calibri,Arial,Helvetica,sans-serif" dir="ltr">
<p>Thank you very much! <br>
</p>
<br>
<p>I am using VTK 7.0 and I think <font size="2"><span style="font-size:10pt">vtkBillboardTextActor3D</span></font> is not available in this version.<br>
I tried vtkTextActor3D but I need a text which is always facing the camera.<br>
<br>
I think it must be possible to calculate a new position point P' (bottom left corner) which leads to a text
<br>
whose center is at the desired position P.<br>
<br>
I tried to use follower->getCenter() to get the center of the bounding box of my text. But now I don't know how to shift<br>
the position point (bottom left corner) in a manner that the center point = my desired position.<br>
<br>
<br>
<br>
<br>
</p>
<br>
<div style="color:rgb(0,0,0)">
<div>
<hr style="display:inline-block;width:98%">
<div id="m_-494195518645984562x_divRplyFwdMsg" dir="ltr"><font style="font-size:11pt" face="Calibri, sans-serif" color="#000000"><b>Von:</b> David Lonie <<a href="mailto:david.lonie@kitware.com" target="_blank">david.lonie@kitware.com</a>><br>
<b>Gesendet:</b> Donnerstag, 09. Februar 2017 18:35<br>
<b>An:</b> M. Jordan<br>
<b>Cc:</b> <a href="mailto:vtkusers@vtk.org" target="_blank">vtkusers@vtk.org</a><br>
<b>Betreff:</b> Re: [vtkusers] vtkTextActor align to center of text</font>
<div> </div>
</div>
</div>
<font size="2"><span style="font-size:10pt">
<div class="m_-494195518645984562PlainText">You'll likely have better luck using vtkTextActor3D or<br>
vtkBillboardTextActor3D. These have vtkTextProperties you can modify<br>
to set things like justification/alignment.<br>
<br>
HTH,<br>
Dave<br>
<br>
On Thu, Feb 9, 2017 at 6:37 AM, M. Jordan <<a href="mailto:mjordan@live.at" target="_blank">mjordan@live.at</a>> wrote:<br>
> Hi,<br>
><br>
> I am creating a 3D text like this:<br>
><br>
> // create text<br>
> vtkSmartPointer<vtkVectorText> textSource =<br>
> vtkSmartPointer<vtkVectorText><wbr>::New();<br>
> textSource->SetText("TEST");<br>
> textSource->Update();<br>
> // create a mapper for the text<br>
> vtkSmartPointer<<wbr>vtkPolyDataMapper> txtmapper =<br>
> vtkSmartPointer<<wbr>vtkPolyDataMapper>::New();<br>
> txtmapper->SetInputConnection(<wbr>transformFilter-><wbr>GetOutputPort());<br>
> // create a subclass of vtkActor: a vtkFollower that remains facing the<br>
> camera<br>
> vtkSmartPointer<vtkFollower> follower =<br>
> vtkSmartPointer<vtkFollower>::<wbr>New();<br>
> follower->SetMapper(txtmapper)<wbr>;<br>
> follower->SetCamera(renderer-><wbr>GetActiveCamera());<br>
> follower->SetPosition(10.0,20.<wbr>0,30.0);<br>
><br>
> Now the passed follower position is approximately the bottom left corner of<br>
> my text.<br>
><br>
> How can I achieve a text which is centered about my desired position?<br>
> For example the text "101" should result in a 3D text with the center being<br>
> located in the middle of the "0"<br>
><br>
> Thank you very much!<br>
><br>
><br>
><br>
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</blockquote></div><br></div></div></div></div>